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Article in English | LILACS, BBO | ID: biblio-1155002


ABSTRACT Objctive: To assess the soft tissue characteristics of Bangladeshi adults to formulate soft tissue 3D CT standards using Holdaway's (HA) and lip morphology (LM) analyses. Another aim of this study was to assess the gender dimorphism of Bangladeshi population. Material and Methods: One hundred and seventeen (Eighty-five men and Thirty-two women) Bangladeshi adults have obtained their computed tomography (CT) scan at the Radiology Department for normal diagnosis. Craniofacial deformities were undetected in all cases. The CT images were prepared by a 3D imaging programming software (Mimics 11.02 Materialise). Parameters from the identified landmark points were measured in 3D through this software. Results: Upper lip thickness (ULT) (vermillion UL-A point) measurement was significant in HA and in LM analyses, upper lip protrusion (ULP) (Ls to Sn-SPog) measurement has demonstrated significant difference among both genders, where p-value was less than 0.05. Mean measurements of Bangladeshi adults were relatively comparable except the face convexity (FC) when compared with the HA cephalometric soft tissue values. Conclusion: By using HA and LM analyses, 3D CT soft tissue standards were established for Bangladeshi adults. Measurements for all parameters have remained equivalent with the HA standard data apart from the FC measurement. This consequently may demonstrate that the Bangladeshi population retains a convex shape with a slight protrusive lip or retruded chin.

Humans , Male , Female , Adult , Orthodontics, Corrective , Skull/diagnostic imaging , Diagnostic Imaging/instrumentation , Craniofacial Abnormalities/diagnostic imaging , Face/diagnostic imaging , Therapy, Soft Tissue , Bangladesh/epidemiology , Tomography, X-Ray Computed/instrumentation , Cross-Sectional Studies , Cross-Sectional Studies/methods , Retrospective Studies , Data Interpretation, Statistical , Sex Characteristics
Article in English | LILACS, BBO | ID: biblio-1154999


ABSTRACT Objective: To evaluate the intra-examiner and inter-examiner reliability of linear and curvilinear measurements for the complete assessment of implant sites and jaw pathologies using Cone-Beam Computed Tomography (CBCT). Material and Methods: Fifty cone-beam computed tomographic images of patients were retrieved from the archives of Dentomaxillofacial Radiology. CBCT images taken for implant planning and evaluation of intrabony jaw pathologies (benign cyst/tumor) were included. Two expert oral and maxillofacial radiologists analyzed the images independently and made the measurements. The images for implant planning were analyzed for width, the height of the edentulous site, and the qualitative analysis of bone in the region. Jaw pathologies were assessed for linear dimensions and curvilinear measurements. Results: The inter-observer measurement error for implant site analysis ranged from 0.12 to 0.42 mm with almost perfect agreement (ICC: 0.94 to 1). The inter-observer measurement error for jaw pathology was 0.09 to 0.25 mm (ICC: 0.98-1). Curvilinear measurements showed perfect agreement between the observers. The intraobserver reliability for the various parameters used for the assessment of the implant site and jaw pathologies indicated almost perfect agreement. Conclusion: Reliability between the radiologists is high for various measurements on CBCT images taken for implant planning and jaw pathologies.

Humans , Pathology, Oral , Diagnostic Imaging/instrumentation , Radiographic Image Interpretation, Computer-Assisted/instrumentation , Dental Implantation/instrumentation , Cone-Beam Computed Tomography , Mandible/diagnostic imaging , Retrospective Studies , Observational Studies as Topic/methods , Dimensional Measurement Accuracy , Radiologists , India/epidemiology , Jaw , Mandible/pathology
Article in English | LILACS, BBO | ID: biblio-1180853


ABSTRACT Objective: To evaluate dental age assessment reliability through Tooth Coronal Index (TCI) method. Material and Methods: The cone-beam computed tomography (CBCT) scans of 160 individuals aged between 20-70 years were analyzed in the present study. The height of the crown, i.e., coronal height, and the height of the coronal pulp cavity, i.e., coronal pulp cavity height, of mandibular second premolars and first molars were calculated and then TCI was measured. The actual age of a subject was compared with TCI of tooth and the acquired data were subjected to Pearson's correlation and unpaired t-tests. Results: Negative correlation was observed between the real age and TCI of mandibular first molar (r = -0.094, p=0.382) and second premolar (r = -0.176, p=0.0961. Statistically significant difference was observed between actual age and TCI for mandibular second premolar and first molar (p<0.001). Conclusion: Tooth coronal index has the potential to estimate age of an individual on CBCT scans. It is simple, cost-effective than histological methods and can be applied to both living and unknown dead.

Humans , Male , Female , Adult , Middle Aged , Aged , Diagnostic Imaging/instrumentation , Age Determination by Skeleton , Cone-Beam Computed Tomography/instrumentation , Bicuspid/anatomy & histology , Statistics, Nonparametric , Molar/anatomy & histology
Pesqui. bras. odontopediatria clín. integr ; 19(1): 4340, 01 Fevereiro 2019. tab, ilus
Article in English | LILACS, BBO | ID: biblio-998250


Objective: To assess the prevalence of incidental findings in relation to the side of a patient's face, location, and age group on cone beam computed tomography. Material and Methods: 175 CBCT examinations were performed on patients aged between 12 and 77 years, consisting of recordings of the anatomical location and findings following each examination. For standardization of tomographic evaluations, acquired images were analyzed by two previously trained expert radiologists. After positional adjustment of the multi-dimensional images on the monitor screen, examination of each scan was conducted simultaneously on the coronal, axial, and sagittal planes. Fisher's exact tests and Chi-square tests were used to compare the frequencies of incidental findings using a significance level of 0.05. Results: The most frequent incidental finding was maxillary sinus mucosal thickening, which occurred on the right and left side in 46.3% and 46.9% of the patients, respectively. The second most frequent incidental finding was flattening of the mandibular condyle, occurring on the right and left side in 29.7% and 24% of the patients, respectively. No significant difference was observed among the individual age groups. The number of incidental findings per patient varied from 0 to 5 on the right side and left side and from 0 to 12 in total. The Kendall correlation coefficient for the number of incidental findings between the sides was 0.25 (p<0.0001), indicating a weak but significant and positive association between the sides in relation to the number of incidental findings. The mean total number of incidental findings was 4.07. Conclusion: The prevalence of the individual incidental findings and the total number of findings were not statistically different. However, some alterations were more likely to be observed bilaterally.

Humans , Child , Adolescent , Adult , Middle Aged , Aged , Diagnostic Imaging/instrumentation , Prevalence , Incidental Findings , Cone-Beam Computed Tomography/instrumentation , Brazil , Chi-Square Distribution , Statistics, Nonparametric
Pesqui. bras. odontopediatria clín. integr ; 19(1): 4917, 01 Fevereiro 2019. ilus, tab, graf
Article in English | LILACS, BBO | ID: biblio-998265


Objective: To observe the outcomes of dental implant treatment based on the evaluation of bone conditions using Cone Beam Computed Tomography (CBCT). Material and Methods: A total of 31 dental implants were collected for the present study. Subsequently, mesial and distal bone losses were examined, while buccal and lingual bone thickness were measured at 7 levels. Evaluation and interpretation of CBCT results was performed by 3 independent examiners. Results: The average of mesial bone loss was 1.08 mm and 1.36 mm on distal bone. Every dental implant had lingual/palatal bone on level 1 to 3, only 1 (6.5%) didn't have bone on level 4, 3 implants (9.7%) had no bone at level 5 and 6, and 22 implants (74.2%) had no bone at level 7/implant platform. There were 8 implants (25.8%) didn't have buccal bone at level 7, only 1 implant (3.2%) didn't have buccal bone at level 2,4,5 and 6, and there were 2 implants (6.5%) had no buccal bone on level 3. Dehiscence / fenestration can be seen on 90% of the implant subjects. Conclusion: These bone loss condition could be consequence of several factors such as infection, diagnosis, treatment plan, and operator's surgery skills. The implants that placed without CBCT could lead to operator miscalculation on bone condition, therefore in moderate to advanced cases, the use of CBCT should be mandatory for treatment plan.

Diagnostic Imaging/instrumentation , Alveolar Bone Loss/diagnosis , Cone-Beam Computed Tomography/instrumentation , Mandible/diagnostic imaging , Statistics, Nonparametric , Indonesia
Article in English | LILACS, BBO | ID: biblio-965569


In the last decades, head and face imaging has shifted from two-dimensional (2D) representations (conventional radiography, photography) to three-dimensional (3D) techniques that can better depict the complex morphology of this part of the body, since they can provide a large number of additional anthropometric information [1-3]. 3D imaging systems can be divided into volumetric (computed tomography, cone beam computed tomography, magnetic resonance imaging) and optical surface instruments (laser scanning, moiré techniques, stereophotogrammetry, patterned light techniques) [4]. These last are safe and not invasive, and provide a 3D representation of the external (cutaneous) facial surface.

Diagnostic Imaging/instrumentation , Photogrammetry/methods , Child , Adolescent , Face , Anthropometry/methods , Imaging, Three-Dimensional/methods , Dimensional Measurement Accuracy
Einstein (Säo Paulo) ; 14(4): 577-579, Oct.-Dec. 2016. graf
Article in English | LILACS | ID: biblio-1039718


ABSTRACT The intraoperative identification of certain anatomical structures because they are small or visually occult may be challenging. The development of minimally invasive surgery brought additional difficulties to identify these structures due to the lack of complete tactile sensitivity. A number of different forms of intraoperative mapping have been tried. Recently, the near-infrared fluorescence imaging technology with indocyanine green has been added to robotic platforms. In addition, this technology has been tested in several types of operations, and has advantages such as safety, low cost and good results. Disadvantages are linked to contrast distribution in certain clinical scenarios. The intraoperative near-infrared fluorescent imaging is new and promising addition to robotic surgery. Several reports show the utility of this technology in several different procedures. The ideal dose, time and site for dye injection are not well defined. No high quality evidence-based comparative studies and long-term follow-up outcomes have been published so far. Initial results, however, are good and safe.

RESUMO A identificação intraoperatória de certas estruturas anatômicas, por seu tamanho ou por elas serem ocultas à visão, pode ser desafiadora. O desenvolvimento da cirurgia minimamente invasiva trouxe dificuldades adicionais, pela falta da sensibilidade tátil completa. Diversas formas de detecção intraoperatória destas estruturas têm sido tentadas. Recentemente, a tecnologia de fluorescência infravermelha com verde de indocianina foi associada às plataformas robóticas. Além disso, essa tecnologia tem sido testada em uma variedade de cirurgias, e suas vantagens parecem estar ligadas a baixo custo, segurança e bons resultados. As desvantagens estão associadas à má distribuição do contraste em determinados cenários. A imagem intraoperatória por fluorescência infravermelha é uma nova e promissora adição à cirurgia robótica. Diversas séries mostram a utilidade da tecnologia em diferentes procedimentos. Dose ideal, local e tempo da injeção do corante ainda não estão bem estabelecidos. Estudos comparativos de alta qualidade epidemiológica baseados em evidência ainda não estão disponíveis. No entanto, os resultados iniciais são bons e seguros.

Humans , Diagnostic Imaging/methods , Monitoring, Intraoperative , Surgery, Computer-Assisted/methods , Robotic Surgical Procedures/methods , Infrared Rays , Biliary Tract/anatomy & histology , Diagnostic Imaging/instrumentation , Feasibility Studies , Indocyanine Green
Full dent. sci ; 7(25): 98-101, jan.2016. tab
Article in Portuguese | LILACS | ID: lil-790084


This study aims to evaluate the association between habitual body posture during sleep, sleep disturbances, and TMD severity. One hundred and fifty patients with complaints of TMD signs and symptoms were considered for this study. However, sixty-seven patients were diagnosed with TMD through the Research Diagnostic Criteria for Temporomandibular Dysfunction (RDC-TMD) and were evaluated in the study. The sleep habits were assessed using specific questionnaires answered individually. It was use a self-report questionnaire with questions relating to different sleep habits: sleep with hand under the chin, wake up with face discomfort, read or watch TV on bed, take drug or alcohol to sleep; and questions relating to sleep disorders based on General Health Questionnaire (GHQ): difficulty to keeping sleep, wake up early and get no sleep. The level of TMD was obtained with FonsecaÆs anamnestic index. A database was created and the statistical analysis used in this study was the chi-square test, with a significance level of 95% (p < 0.05). There was a statistical association between the TMD severity and patients who sleep with hand under the chin (p=0.004), wake up with face discomfort (0=0.004), and read or watch TV on bed (p=0.009). It can be concluded that patients with TMD require special consideration with respect to usual body posture during sleep...

Este estudo tem como objetivo avaliar a associação entre a postura corporal habitual durante o sono, distúrbios do sono e severidade da DTM. Cento e cinquenta pacientes com queixas de sinais e sintomas de DTM foram considerados para este estudo. Sessenta e sete pacientes foram diagnosticados com DTM através dos critérios diagnósticos de pesquisa em disfunção temporomandibular (RDC - TMD) e incluídos neste trabalho. Os hábitos de sono foram avaliados por meio de questionários específicos. Foi usado um questionário de autorrelato com as questões relativas a diferentes hábitos de sono: dormir com a mão sob o queixo, acordar com desconforto no rosto, ler ou assistir TV na cama, usar drogas ou álcool para dormir; e as questões relacionadas aos distúrbios do sono baseadas no Questionário de Saúde Geral (General Health Questionnaire - GHQ): dificuldade em manter o sono, acordar cedo e ficar sem dormir. O grau de DTM foi obtido com o índice de Fonseca. Um banco de dados foi criado e a análise estatística utilizada neste estudo foi o teste do qui-quadrado, com um nível de significância de 95% (p <0,05). Houve uma associação estatisticamente significativa entre a severidade da DTM e os pacientes que dormem com a mão sob o queixo (p = 0,004), acordam com desconforto na face (0 = 0,004) e leem ou assistem TV na cama (p = 0,009). Pode-se concluir que os pacientes com DTM requerem uma análise especial com relação à postura corporal habitual durante o sono...

Humans , Diagnostic Imaging/instrumentation , Sleep , Temporomandibular Joint Dysfunction Syndrome/etiology , Chi-Square Distribution , Surveys and Questionnaires
Article in English | WPRIM | ID: wpr-77116


The advent of three-dimensional printing (3DP) technology has enabled the creation of a tangible and complex 3D object that goes beyond a simple 3D-shaded visualization on a flat monitor. Since the early 2000s, 3DP machines have been used only in hard tissue applications. Recently developed multi-materials for 3DP have been used extensively for a variety of medical applications, such as personalized surgical planning and guidance, customized implants, biomedical research, and preclinical education. In this review article, we discuss the 3D reconstruction process, touching on medical imaging, and various 3DP systems applicable to medicine. In addition, the 3DP medical applications using multi-materials are introduced, as well as our recent results.

Biomedical Research , Computer-Aided Design , Diagnostic Imaging/instrumentation , Humans , Precision Medicine , Printing, Three-Dimensional , Prostheses and Implants
Ortodontia ; 48(5): 447-451, set.-out.2015. ilus
Article in Portuguese | LILACS | ID: lil-783988


O objetivo do presente estudo foi avaliar as alterações das medidas angulares e lineares mais comumente utilizadas em cefalometria, quando a posição natural da cabeça (PNC) é modificada durante a tomada da telerradiografia em norma lateral (acréscimo e decréscimo de 7° em relação à PNC). Para tanto, foram analisadas 90 telerradiografias de 30 pacientes do sexo feminino (média de idade de 22,7 anos). Em cada paciente, foram obtidas três telerradiografias em um único momento: PNC, PNC acrescida de 7° e PNC com decréscimo de 7°. Os resultados apontaram alterações significativas para as medidas SN.VER, HF.VER e ângulo Z, porém, não foram observadas diferenças estatisticamente significantes para as demais grandezas: SNA, SNB, ANB, PP.GoGn, 1.PP, IMPA, 1.1, SN.GoGn, FMA, SN.PP, S-N, ENA-ENP, Co-Gn, Co-Go e Go-Gn. Sendo assim, concluiu-se que a inclinação da cabeça do paciente, dada pelo acréscimo ou decréscimo de 7° em relação à PNC, não apresenta interferência para as medidas cefalométricas aqui estudadas, salvo aquelas que levam em consideração a linha vertical verdadeira para sua construção...

The aim of the present study was to assess the alterations in angular and linear cephalometric measurements when modifying the natural head position (NHP) inclination to +7 or -7 degrees. Ninety cephalometric radiographs of 30 female patients (average of 22.7 years old) were obtained as follows: NHP, with +7 degrees and with -7 degrees. Statistically significant differences were observed for measurements SN.VER, HF.VER and Z angle. No influence was observed on all other measurements: SNA, SNB, ANB, PP.GoGn, 1. PP, IMPA, 1.1, SN.GoGn, FMA, SN.PP, S-N, ENA-ENP, Co-Gn, Co-Go and Go-Gn. It was concluded that tipping the head towards +7 or -7 degrees in relation to NHP has no interference to cephalometric measurements studied here, except those which use the true vertical line for its construction...

Humans , Female , Young Adult , Cephalometry , Diagnostic Imaging/instrumentation , Orthodontics , Radiography
Full dent. sci ; 6(22): 261-275, mar. 2015. ilus
Article in Portuguese | LILACS | ID: lil-754394


A tomografia computadorizada de feixe cônico, também conhecida como tomografia cone beam, foi especialmente desenvolvida para a Odontologia. Esta técnica imaginológica permite a reconstrução de imagens bidimensionais e tridimensionais, além de mensurações precisas em todos os planos de espaço (axial, sagital e coronal). Este artigo apresenta informações atualizadas colhidas na literatura, tendo como objetivo trazer dados sobre o equipamento tomográfico, o processo de formação da imagem e as principais aplicações clínicas desta tecnologia nas diferentes especialidades odontológicas, além de apresentar casos que demonstraram uma marcante discrepância entre o diagnóstico realizado quando da utilização de radiografias convencionais e de imagens obtidas da tomografia computadorizada de feixe cônico...

The cone beam computed tomography was specially developed for Dentistry. This imaging technique allows the reconstruction of two and three-dimensional images, and also precise mensurations in all space plans (axial, sagital, and coronal). This article presents up to date information obtained from literature, aiming to bring data about the tomographic equipment, the image creation process and the main applications in different dental areas, and presenting as well clinical cases that shows an outstanding discrepancy between the diagnosis realized by conventional radiographies and by images obtained from cone beam computed tomography...

Humans , Female , Adolescent , Young Adult , Diagnostic Imaging/instrumentation , Esthetics, Dental , Specialties, Dental , Cone-Beam Computed Tomography/instrumentation , Radiography, Dental/instrumentation
Article in English | WPRIM | ID: wpr-79636


The purpose of this cross-sectional study was to measure imaging utilization rates and the negative appendectomy rate (NAR) in metropolitan Seoul, Korea. The study included 2321 adolescents and adults (> or =15 yr; median [interquartile range] age, 37 [27-50] yr; 46.7% female) undergoing appendectomy in 2011 at eight tertiary and three secondary hospitals. Imaging utilization rate was 99.7% (95% confidence interval, 99.4%-99.9%). CT and ultrasonography utilization rates as an initial imaging modality were 93.1% (92.0%-94.1%), and 6.5% (5.6%-7.6%), respectively. The NAR in patients undergoing CT only, complementary ultrasonography following CT, ultrasonography only, and complementary CT following ultrasonography were 3.3% (2.6%-4.1%), 27% (14%-44%), 9% (4%-16%), and 8% (2%-20%), respectively. The use of ultrasonography instead of CT as the initial imaging modality was significantly associated with higher NAR (adjusted odds ratio [AOR], 2.28 [1.22-4.27]; risk difference, 4.4 [0-8.8] percentage points), however, the population attributable risk was 0.3 [0-0.6] percentage points. We observed a very high CT utilization rate and a low NAR in metropolitan Seoul. Although the use of CT was significantly associated with the lower NAR, CT utilization rate already has reached the level that increase in CT utilization from the status quo would hardly decrease the NAR further.

Acute Disease , Adolescent , Adult , Appendicitis/diagnosis , Cross-Sectional Studies , Diagnostic Imaging/instrumentation , Female , Humans , Male , Middle Aged , Sensitivity and Specificity , Tomography, X-Ray Computed , Young Adult
Rev. argent. ultrason ; 11(4): 212-214, dic. 2012.
Article in Spanish | LILACS | ID: lil-671868


Descripción de diferentes causales de responsabilidad en el campo de la ultrasonografía y del diagnóstico por imágenes

Diagnostic Imaging/ethics , Diagnostic Imaging/instrumentation , Liability, Legal , Medical Records/legislation & jurisprudence , Ultrasonography
GEN ; 66(2): 102-106, jun. 2012. tab
Article in Spanish | LILACS | ID: lil-664210


La ecografía abdominal es importante en el diagnóstico y tratamiento de un número elevado de patologías abdominales. El dolor abdominal es la principal indicación de ecografía. Se plan-tea la posibilidad de diagnosticar alteraciones y/o patologías asintomáticas, que pueden requerir intervención temprana. Determinar el beneficio de la ecosonografía abdominal en la evaluación pediátrica de rutina. Trabajo prospectivo y transversal. Se incluyen pacientes escogidos al azar, para realizarles ecografía abdominal. Distribuidos en grupo A, los niños con solicitud de evaluación gastrointestinal y grupo B, niños sin patología gastrointestinal. Se solicita consentimiento informado. Un total de 182 niños, promedio de edad 4,70 años (rango 1m-14 años), 92 varones y 90 hembras. De 131 niños, con enfermedad gastrointestinal, grupo A, 32(24,42%) presentaron alteraciones a la ecografía. De ellos 17/32(53,12%) con hallazgos ecográficos en relación a la enfermedad de base siendo lo más frecuentes hepatopatías (esteatosis, hepatomegalia, fibrosis periportal), litiasis vesicular, cambios en vísceras huecas y reflujo gastroesofágico; 15/32(46,88%) se detectaron alteraciones no relacionados con la enfermedad de base, como: enfermedad renal, tumoración abdominal, esplenomegalia. Grupo B: 16/51 (31,37%) se detectó alteraciones en órganos abdominales: barro biliar, esplenomegalia, hepatopatía, alteraciones renales y otras. Se encontró una diferencia significativa entre los grupos, en relación al hallazgo de alteraciones ecográficas no relacionadas con el motivo de consulta. Los resultados permiten inferir que la ecografía es una herramienta sensible que puede ser utilizada de rutina en la evaluación pediátrica para detectar alteraciones en órganos abdominales para una intervención temprana y tratamiento oportuno.

Abdominal ultrasound is important in the diagnosis and treatment of a large number of abdominal pathology. Abdominal pain is the main indication for ultrasound. It raises the possibility of diagnosing disorders and/or asymptomatic pathologies that may require early intervention. To determine the benefit of abdominal sonography in the routine pediatric evaluation. Prospective and cross. Includes patients are randomly selected for abdominal ultrasound and distributed in two groups: Group A, children with gastrointestinal application indication for assessment and group B, children without gastrointestinal pathology. Informed consent is requested. Results: A total of 182 children, mean age 4.70 years (range 1 m-14 years), 92 males and 90 females. Of 131 children with gastrointestinal disease, group A, 32 (24.42%) had alterations to the ultrasound. Of these 17/32 (53.12%) with ultrasound findings in relation to the underlying disease being the most common liver disease (steatosis, hepatomegaly, periportal fibrosis), gallstones, changes in hollow viscera and gastroesophageal reflux; 15/32 (46.88%) were detected abnormalities not related to underlying disease, such as kidney disease, abdominal tumor, splenomegaly. Group B: 16/51 (31.37%) resulted with detected abnormalities in abdominal organs, biliary sludge, spleen, liver, renal and others. We found a significant difference between groups in relation to the discovery of ultrasound abnormalities unrelated to the complaint. The results allow to conclude that ultrasound is a sensitive tool that can be used in routine pediatric evaluation to detect changes in abdominal organs for early intervention and treatment.

Female , Child, Preschool , Child , Diagnostic Imaging/instrumentation , Gastrointestinal Diseases/pathology , Ultrasonography , Gastroenterology , Pediatrics
Radiol. bras ; 44(4): 238-243, jul.-ago. 2011. tab
Article in Portuguese | LILACS | ID: lil-598551


OBJETIVO: Analisar a inovação tecnológica brasileira na área de radiologia e diagnóstico por imagem, em termos de indicadores de patentes. MATERIAIS E MÉTODOS: Este é um estudo analítico-exploratório de informações recuperadas por meio de consultas cruzadas nas bases de dados dos escritórios de propriedade intelectual do Brasil (Instituto Nacional da Propriedade Industrial - INPI), dos Estados Unidos (United States Patent and Trademark Office - USPTO) e da Europa (European Patent Office - EPO). RESULTADOS: Foram encontradas 277.057 patentes. Desse total, 7.800 foram registradas no INPI (3 por cento), 65.428 (24 por cento) registradas no EPO e 203.829 (73 por cento) emitidas no USPTO. O Brasil é o país signatário em 1.732 patentes publicadas no INPI, 80 no EPO e 26 no escritório USPTO. Globalmente, 219.993 (79 por cento) patentes referiam-se a dispositivos eletrônicos ligados a informática em saúde, ultrassonografia, ressonância magnética, tomografia computadorizada e procedimentos de geração, comunicação e arquivamento de imagens, e 57.064 (21 por cento) das patentes tratavam das tecnologias relacionadas a radioproteção e dosimetria, física nuclear, eletroterapia, terapia magnética e radioterapia. CONCLUSÃO: Os resultados obtidos apontam para a fragilidade da produção nacional de inovação tecnológica registrada em patentes, no campo de radiologia e diagnóstico por Imagem.

OBJECTIVE: To analyze the Brazilian technological innovation in the field of radiology and imaging diagnosis, in terms of patent indicators. MATERIALS AND METHODS: Exploratory analytical study of information retrieved through cross queries in databases of intellectual property offices in Brazil (State Industrial Property Office [Instituto Nacional da Propriedade Industrial - INPI]), United States (United States Patent and Trademark Office - USPTO) and Europe (European Patent Office - EPO). RESULTS: There were 277,057 patents in the field of radiology and imaging diagnosis. Of this total, 7,800 were registered at INPI (3 percent), 65,428 (24 percent) registered at the EPO and 203,829 (73 percent) issued by USPTO. Brazil is a signatory to 1,732 patents published by the INPI, 80 by the EPO and 26 by the USPTO. Overall, 219,993 (79 percent) patents were related to electronic devices strongly linked to information technology in health care, ultrasonography, tomography, magnetic resonance imaging procedures as well as to images generation, communication and archiving, and 57,064 patents (21 percent) dealt with technologies related to radiation protection and dosimetry, nuclear physics, electrotherapy, magnetic therapy and radiotherapy. CONCLUSION: The results indicate the weakness of the domestic production of patented technological innovation in the field of radiology and imaging diagnosis.

Diagnostic Imaging/instrumentation , Intellectual Property , Patent Indicators , Technology, Radiologic/instrumentation , Brazil , Radiology , Tomography , Ultrasonography , X-Rays
Rev. clín. pesq. odontol. (Impr.) ; 6(1): 49-55, jan.-abr. 2010. ilus, tab
Article in English | LILACS, BBO | ID: lil-617365


OBJECTIVE: To compare the findings of the clinical examination of the oral cavity with and without theaid of an intraoral video camera (“videoroscopy”) with the purpose of diagnosing epithelial precursorlesions (leukoplakia, erythroplakia and actinic cheilitis) and precancerous conditions (lichen planus).MATERIALS AND METHODS: Both forms of examination were performed in 100 patients withincreased risk of oral cancer. All patients were examined without the aid of any enlargement apparatusbefore the intraoral video camera was used. After each of the exams, the presence or absence of epithelialprecursor lesions or lichen planus was recorded. In the event a lesion was found, a digital picture was takena toluidine blue staining test was performed and then a biopsy was done. RESULTS: Of the patients withepithelial precursor lesions or lichen planus, 80% of the lesions had been observed in both of the examinationswhile 7% only had been diagnosed the after the videoroscopy. The results of the histopathological analysisand the toluidine blue staining tests are also presented. CONCLUSIONS: In this study videoroscopy issuggested for use on a regular basis in patients with an increased risk of oral cancer in an attempt to diagnoseearly lesions, select of the best area to be biopsied and during the following up of these lesions.

OBJETIVO: Comparar os achados do exame clínico da boca com e sem auxílio da vídeo-câmeraintrabucal (videoroscopia) com o propósito de diagnosticar lesões epiteliais precursoras(leucoplasia, eritroplasia, eritroleucoplasia e queilite actínica) e condições pré-cancerosas (líquen plano). MATERIAL E MÉTODOS: Os exames foram realizados em 100 pacientes com riscoaumentado para câncer oral. Todos os pacientes foram examinados sem o auxílio de qualqueraparelho de aumento antes que a vídeo-câmera intrabucal fosse usada. Após cada exame, a presençaou ausência de lesões epiteliais precursoras ou líquen plano foram anotadas. Nos casos em quelesões foram diagnosticadas, fotografaram-se as lesões, bem como o teste do azul de toluidina ea biópsia. RESULTADOS: Dos pacientes com lesão epitelial precursora ou líquen plano, 80%das lesões foram observadas em ambos os exames, enquanto 7% foram somente diagnosticadasapós a videoroscopia. Os resultados histopatológicos e dos testes com azul de toluidina foramtambém discutidos. CONCLUSÕES: Sugere-se a utilização regular da videoroscopia nos pacientescom risco aumentado para o câncer de boca, para auxiliar o diagnóstico de lesões precoces, naseleção da melhor área para a biópsia e acompanhamento dessas lesões.

Humans , Male , Female , Adolescent , Young Adult , Middle Aged , Diagnosis, Oral/instrumentation , Diagnostic Imaging/instrumentation , Mouth Neoplasms/diagnosis , Diagnostic Imaging/methods , Early Diagnosis , Epidemiologic Factors
Rev. bras. eng. biomed ; 25(2): 67-74, ago. 2009. ilus, graf
Article in Portuguese | LILACS | ID: lil-556116


O uso de interação da luz com a matéria não é um conceito novo em biologia para a detecção de processos físico-químicos, embora ainda seja utilizado de uma forma rudimentar. Já é sabido que imagens de refletância e fluorescência podem revelar informações importantes sobre tais processos em amostras biológicas. Apesar deste potencial, os sistemas experimentais disponíveis para a obtenção de tais imagens costumam serem complexos e de difícil implementação. Neste trabalho é descrita a construção e a caracterização de uma montagem experimental para produção de imagens hiperespectrais entre 400 e 1.000 nm. O sistema é composto de um espectrômetro, um conjunto de lentes para formação da imagem e uma câmera CCD para capturá-la. São descritos em detalhes o procedimento de calibração do sistema, o qual envolve os parâmetros largura da imagem, campo de visão, resolução espectral e espacial. O sistema de iluminação utiliza diodos emissores de luz de alta potência, tanto de luz branca quanto em 470 e 405 nm. Demonstramos que o sistema construído é capaz de obter imagens de fluorescência e/ou refletância de amostras biológicas. Como exemplos de aplicações, o instrumento aqui desenvolvido foi utilizado em dois campos distintos, a agricultura e a odontologia. Foram obtidas imagens de fluorescência de folhas de citros contaminadas com cancro cítrico, e de processos de desmineralização em dentes. Os resultados demonstram que o sistema construído está operando como projetado.

The use of light-mater interaction for the detection of chemicalphysical processes is not a new concept in biology, though it is still used in a rudimentary form. It is already known that reflectance as well as fluorescence images can reveal important information on such processes in biological samples. In spite of this potential, the experimental available image systems usually are complexes and of difficult implementation. In this work, we describe the construction and characterization of an experimental device to produce hyperspectral images between 400 and 1,000 nm. The system is composed of a spectrometer, a set of lenses for image formation and a CCD camera to capture it. We describe in details also the calibration procedure of the system, which involves parameters as image width, field of view, spectral and space resolution. The illumination system uses high power light emitting diodes, either at white light or at 470 and 405 nm. We demonstrate that our system is able to obtain reflectance as well as fluorescence images of biological samples. As examples of applications, we use it into two different fields, agriculture and dentistry. We obtained fluorescence images of citrus leaves contaminated with citrus canker and demineralization processes in teeth. Our results demonstrate that our system isoperating as designed.

Spectrometry, Fluorescence/instrumentation , Spectrometry, Fluorescence/methods , Spectrometry, Fluorescence , Spectrum Analysis/instrumentation , Spectrum Analysis/methods , Diagnostic Imaging/instrumentation , Molecular Imaging/instrumentation , Image Interpretation, Computer-Assisted/instrumentation , Risk Measurement Equipment