Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 18 de 18
Filtrar
1.
J Microbiol Immunol Infect ; 54(3): 349-358, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-33863652

RESUMO

The radiology department was categorized as a "high risk area" during the severe acute respiratory syndrome (SARS) outbreak in 2003 and is similarly considered a "high risk area" during the current coronavirus (COVID-19) pandemic. The purpose of infection control is to isolate patients with suspected or confirmed COVID-19 from uninfected people by utilizing separate equipment, spaces, and healthcare workers. Infection control measures should be prioritized to prevent the nosocomial spread of infection. We established a COVID-19 infection control team in our radiology department. The team's responsibilities include triaging patients with confirmed or suspected COVID-19, performing imaging and reporting, using dedicated equipment, disinfecting the equipment and the immediate environment, and staff scheduling.


Assuntos
COVID-19/prevenção & controle , Infecção Hospitalar/prevenção & controle , Controle de Infecções/métodos , Guias de Prática Clínica como Assunto , Serviço Hospitalar de Radiologia/organização & administração , Pessoal de Saúde , Humanos , Assistência ao Paciente/métodos , Planejamento de Assistência ao Paciente , Segurança do Paciente , Equipamento de Proteção Individual/normas , Admissão e Escalonamento de Pessoal/organização & administração , Avaliação de Programas e Projetos de Saúde
2.
Can Assoc Radiol J ; 67(4): 379-386, 2016 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-27499452

RESUMO

One of the most common knee injuries is ligament tear, which may initially manifest as an osseous injury in radiographs. Radiologists should therefore be able to recognize ligament tears of the knee as osseous abnormalities in images. This review focuses on the imaging features of knee ligament injuries and their related osseous injuries: anterior cruciate ligament (ACL) tear with Segond fracture; associated marrow contusion; ACL avulsion fracture; posterior cruciate ligament (PCL) tear with osseous avulsion of the ligament including arcuate sign; reverse Segond fracture; PCL avulsion fracture; medial collateral ligament tear with Pellegrini-Stieda disease; lateral collateral ligament tear with avulsion fracture of the fibular head; and patellar ligament injuries with Osgood-Schlatter and Sinding-Larsen-Johansson.


Assuntos
Fêmur/diagnóstico por imagem , Articulação do Joelho/diagnóstico por imagem , Ligamentos Articulares/lesões , Imageamento por Ressonância Magnética , Radiografia , Tíbia/diagnóstico por imagem , Fêmur/lesões , Fíbula/diagnóstico por imagem , Fíbula/lesões , Humanos , Ligamentos Articulares/diagnóstico por imagem , Patela/diagnóstico por imagem , Patela/lesões , Ruptura/diagnóstico por imagem , Tíbia/lesões
3.
Int Urol Nephrol ; 45(5): 1309-18, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23283594

RESUMO

BACKGROUND: N-Acetylcysteine (NAC) is reported to have potential for preventing of contrast-induced nephropathy (CIN) in patients undergoing coronary angiography. However, the effectiveness of NAC in preventing CIN in patients undergoing contrast-enhanced computed tomography (CT) is still controversial. We conducted a meta-analysis of relevant randomized controlled trials (RCTs) to further examine this issue. METHODS: RCTs were identified by computerized searching in PubMed, EMBASE, SCOPUS, and Cochrane databases. Two reviewers independently assessed the methodological quality of each study. A meta-analysis was performed to evaluate the effectiveness of NAC in preventing CIN in patients undergoing CT. The primary outcome was the incidence of contrast-induced nephropathy, and the requirement for dialysis. The secondary outcome was the change of serum creatinine. RESULTS: Six randomized controlled trials were identified with a total of 496 patients meeting the criteria for this study. Prophylactic administration of NAC in patients with serum creatinine above 1.2 mg/dL undergoing contrast-enhanced CT, along with hydration, reduced the risk of CIN (relative risk 0.20; 95 % confidence interval: 0.07-0.57). Requirement for dialysis was not significantly different between the NAC group and the control group. CONCLUSIONS: This review provides evidence of the efficacy of NAC in preventing the incidence of CIN and recommends that NAC be more widely used in high-risk patients undergoing contrast-enhanced CT. On the basis of the evidence reviewed, further research involving large RCTs may be warranted.


Assuntos
Acetilcisteína/uso terapêutico , Injúria Renal Aguda/induzido quimicamente , Injúria Renal Aguda/prevenção & controle , Meios de Contraste/efeitos adversos , Sequestradores de Radicais Livres/uso terapêutico , Injúria Renal Aguda/fisiopatologia , Injúria Renal Aguda/terapia , Creatinina/sangue , Cistatina C/sangue , Hidratação , Taxa de Filtração Glomerular , Humanos , Ensaios Clínicos Controlados Aleatórios como Assunto , Diálise Renal , Tomografia Computadorizada por Raios X
4.
JBR-BTR ; 95(5): 322-4, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-23198376

RESUMO

Sacrococcygeal teratoma (SCT) is a neoplasm derived from more than one primitive germ cell layer. SCTs have rarely been reported in adults. We present a case of a 17-year-old youth who complained of a painful mass over his left buttock.The mass had been growing gradually since his childhood. Magnetic resonance imaging showed a well-defined soft-tissue mass which contained mainly fat tissue and large intestine. The patient had complete excision of the tumor and coccyx.The gross impression and histology revealed a mature teratoma.


Assuntos
Região Sacrococcígea , Neoplasias da Coluna Vertebral/diagnóstico , Teratoma/diagnóstico , Adolescente , Diagnóstico Diferencial , Humanos , Imageamento por Ressonância Magnética , Masculino , Neoplasias da Coluna Vertebral/patologia , Neoplasias da Coluna Vertebral/cirurgia , Teratoma/patologia , Teratoma/cirurgia , Tomografia Computadorizada por Raios X
6.
Acta Cytol ; 55(1): 30-7, 2011.
Artigo em Inglês | MEDLINE | ID: mdl-21135519

RESUMO

OBJECTIVE: We investigated the role and turn around time of rapid staining and immediate interpretation of fine-needle aspiration cytology (FNAC) for women with palpable breast lesions. STUDY DESIGN: A total of 408 FNAC specimens from 400 patients with palpable breast lesions was analyzed for immediate interpretation and preliminary cytologic diagnosis. All cytological diagnoses were correlated with subsequent alcohol-fixed Papanicolaou-stained slides, mammographic, ultrasonographic and histopathological findings. RESULTS: Of the 408 specimens, 243 (59.6%) were interpreted as benign, 37 (9.0%) atypical, 22 (5.4%) suspicious, 68 (16.7%) malignant, and 38 (9.3%) unsatisfactory. 132 of 408 (32.4%) had subsequent surgical procedures; the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy were 88.5, 100, 100, 81.9 and 92.4%, respectively. The average turn around time was 8.6 min. Mammographic results were available in 242 (59.3%) cases, with 112 (46.3%) undergoing surgical excision. In correlation with mammography and surgical pathology, the false-positive rate, false-negative rate, sensitivity, specificity and accuracy were 1.9, 10.5, 98.1, 89.5 and 95.8%, respectively. CONCLUSIONS: Rapid FNAC interpretation is a useful, effective diagnostic method for palpable breast lesions in our healthcare environment.


Assuntos
Biópsia por Agulha Fina/métodos , Neoplasias da Mama/diagnóstico , Neoplasias da Mama/patologia , Neoplasias da Mama/cirurgia , Mamografia/métodos , Coloração e Rotulagem/métodos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Criança , Técnicas Citológicas , Detecção Precoce de Câncer , Feminino , Humanos , Imuno-Histoquímica/métodos , Programas de Rastreamento , Pessoa de Meia-Idade , Sensibilidade e Especificidade , Adulto Jovem
8.
J Orthop Sci ; 15(1): 44-50, 2010 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-20151250

RESUMO

BACKGROUND: The aim of this study was to develop, from patients' characteristics and radiography, a formula reflecting the decision for total knee arthroplasty (TKA) in patients with a painful osteoarthritic knee. METHODS: We reviewed medical records of 193 consecutive patients who had knee osteoarthritis and underwent primary TKA surgery and 133 consecutive patients with knee osteoarthritis who did not have surgery in one institution during the preceding 5 years. Two skeletal radiologists graded, from 0 to 3, radiographic joint space narrowing (JSN), osteophytes, subchondral sclerosis, and subchondral cysts. The association between the variables and outcome were calculated by the chi-squared test and multivariable logistic regression. RESULTS: Women had more TKAs than men (P = 0.002), and the TKA and non-TKA groups differed in terms of self-care ability (P < 0.001). There were no significant differences in age or body mass index between the two groups. The relevant factors in the reflective formula were age, sex, self-care ability, JSN, and osteophytes in the medial compartment. The retrospective sensitivity and specificity for patients who underwent TKA surgery were 84% and 83%, respectively. The diagnostic efficacy in retrospect evaluated by a receiver operating characteristic curve was 0.92. CONCLUSIONS: A formula reflecting the decision for TKA surgery in patients with a painful osteoarthritic knee has been developed with acceptable diagnostic efficacy obtained retrospectively. The formula should be validated by further study.


Assuntos
Artroplastia do Joelho , Articulação do Joelho/diagnóstico por imagem , Osteoartrite do Joelho/diagnóstico por imagem , Osteoartrite do Joelho/cirurgia , Osteófito/diagnóstico por imagem , Seleção de Pacientes , Índice de Gravidade de Doença , Atividades Cotidianas , Adulto , Idoso , Idoso de 80 Anos ou mais , Artroplastia do Joelho/reabilitação , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Curva ROC , Radiografia , Recuperação de Função Fisiológica , Estudos Retrospectivos
9.
Hip Int ; 19(4): 382-5, 2009.
Artigo em Inglês | MEDLINE | ID: mdl-20041387

RESUMO

PURPOSE: To investigate statistical association between epiphyseal scar and osteonecrosis of the femoral head (ONFH) with magnetic resonance (MR) imaging. PATIENTS AND METHODS: We retrospectively reviewed 71 consecutive patients who underwent MR imaging of bilateral hips that showed nontraumatic ONFH. There were 110 hips with ONFH and 31 normal hips; one hip received bipolar arthroplasty before the MR studies. All cases of ONFH had typical MR findings. The epiphyseal scars in the femoral head were classified as type I (a sealed-off scar) or type II (a perforated scar). Bone marrow edema, if present, in the proximal femur was identified on coronal T2-weighted or STIR MR images. RESULTS: The type of femoral epiphyseal scar was clearly delineated in 97 hips. In cases with ONFH, a type I scar occurred in 46 hips (64%), and a type II scar in 26 hips (36%). In cases of ONFH with bone marrow edema, 69% of hips (24/35) had a type I scar and 31% of hips (11/35) had a type II scar. There was no statistical association between the type of epiphyseal scar and ONFH, regardless of staging (P=0.29), or the type of scar and bone marrow edema (P=0.42). CONCLUSION: There is not a significant statistical association between a sealed-off scar and ONFH.


Assuntos
Necrose da Cabeça do Fêmur/patologia , Lâmina de Crescimento/patologia , Imageamento por Ressonância Magnética , Adulto , Feminino , Humanos , Masculino , Estudos Retrospectivos , Fatores de Risco , Índice de Gravidade de Doença
10.
AJR Am J Roentgenol ; 192(4): 974-9, 2009 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-19304703

RESUMO

OBJECTIVE: The purpose of this study was to use dynamic contrast-enhanced MRI to ascertain the relation between intervertebral disk degeneration and lumbar vertebral marrow blood perfusion. SUBJECTS AND METHODS: We recruited 25 patients (50 vertebral bodies) who underwent dynamic contrast-enhanced MRI of the lumbar spine. The peak signal enhancement of each vertebral body was calculated from the time signal after curve fitting of a pharmacokinetic model. We controlled for other variables that might have affected blood perfusion by assessing two vertebral bodies in each patient. The 25 patients were divided into three groups. In group 1, one of the vertebral bodies (L1 or L3) evaluated was between two adjacent normal disks and the other was between two adjacent degenerated disks. In group 2, each of the two vertebral bodies evaluated was between two normal disks. In group 3 each of the two vertebral bodies evaluated was between two degenerated disks. RESULTS: Without normalization by minimization of other variables, there were no statistically significant differences in original peak enhancement values among groups 1, 2, and 3 (p = 0.179). After normalization, the peak enhancement in group 1 (0.846 +/- 0.060) was significantly lower than that in group 2 (0.988 +/- 0.047) (p = 0.003) or group 3 (0.973 +/- 0.081) (p = 0.008). CONCLUSION: After normalization, lumbar vertebral marrow perfusion correlated well with intervertebral disk degeneration evaluated with dynamic contrast-enhanced MRI. Blood perfusion was 14% less in the vertebral body marrow between two degenerated disks than in vertebral marrow between two normal disks.


Assuntos
Medula Óssea/irrigação sanguínea , Deslocamento do Disco Intervertebral/diagnóstico , Deslocamento do Disco Intervertebral/etiologia , Vértebras Lombares/irrigação sanguínea , Imageamento por Ressonância Magnética/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Meios de Contraste , Feminino , Gadolínio DTPA , Humanos , Processamento de Imagem Assistida por Computador , Análise dos Mínimos Quadrados , Masculino , Pessoa de Meia-Idade , Estatísticas não Paramétricas
11.
Comput Med Imaging Graph ; 32(1): 78-81, 2008 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-17931832

RESUMO

Hemangioblastoma of the conus medullaris with MRI has not been reported before. A 75-year-old man had a history of falling due to weakness of his left lower limb. MRI revealed a well-defined oval mass in the conus medullaris. The tumor had an isointense signal relative to spinal cord on T1-weighted images, hyperintense signal areas intermixed with punctate spots of hypointensity on T2-weighted images, and heterogeneous obvious enhancement on gadolinium-enhanced T1-weighted images. Associated abnormally tortuous vessels were noted in the dura proximal to the tumor. Histological findings were compatible with the diagnosis of hemangioblastoma. Hemangioblastoma should be included in the differential diagnosis in patients with an enhancing tumor and adjacent engorged vessels of the spinal cord.


Assuntos
Hemangioblastoma/diagnóstico , Neoplasias da Medula Espinal/diagnóstico , Medula Espinal/patologia , Idoso , Hemangioblastoma/complicações , Hemangioblastoma/cirurgia , Humanos , Laminectomia , Dor Lombar/complicações , Vértebras Lombares/cirurgia , Imageamento por Ressonância Magnética , Masculino , Transtornos Musculares Atróficos/complicações , Reflexo Anormal , Fluxo Sanguíneo Regional , Região Sacrococcígea/patologia , Medula Espinal/cirurgia , Neoplasias da Medula Espinal/complicações , Neoplasias da Medula Espinal/cirurgia , Osteofitose Vertebral/cirurgia
12.
Clin Imaging ; 31(3): 214-6, 2007.
Artigo em Inglês | MEDLINE | ID: mdl-17449385

RESUMO

Gluteal intramuscular myxomas with MR images have not been reported before. A 45-year-old man presented with a palpable mass in his right buttock for several months. Magnetic resonance imaging showed an intramuscular cystic lesion with homogeneous signal intensity at the right gluteus muscle, and the mass had thin peripheral enhancement after gadolinium administration. The patient was treated by marginal excision of the tumor. Histologic diagnosis was compatible with intramuscular myxoma.


Assuntos
Neoplasias Musculares/diagnóstico por imagem , Mixoma/diagnóstico por imagem , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Neoplasias Musculares/fisiopatologia , Mixoma/fisiopatologia , Radiografia
13.
Comput Med Imaging Graph ; 30(8): 479-82, 2006 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-17056231

RESUMO

Alveolar soft-part sarcoma (ASPS) is rare. We present a case of a 30-year-old woman with a 6-month history of a palpable mass in her left thigh. MRI showed an 8-cm mass and a satellite nodule at the left gluteus muscle. The main tumor exhibited an isointense signal on T1-weighted images and high-signal-intensity areas with low-signal-intensity scanty solid components on T2-weighted images. MR angiography showed dilated and tortuous veins around the tumor. Histologic findings were compatible with ASPS.


Assuntos
Sarcoma/patologia , Neoplasias de Tecidos Moles/patologia , Adulto , Feminino , Humanos , Angiografia por Ressonância Magnética , Imageamento por Ressonância Magnética , Sarcoma/irrigação sanguínea , Neoplasias de Tecidos Moles/irrigação sanguínea , Coxa da Perna
14.
Comput Med Imaging Graph ; 30(3): 209-12, 2006 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-16624522

RESUMO

We present a case of an intermuscular cavernous lymphangioma with predominantly composed of fatty tissue. A 58-year-old man complained a palpable painless mass over his right arm for 1 month. Magnetic resonance imaging (MRI) showed a 14-cm mass with predominantly composed of fatty tissue between long and short heads of triceps muscle. There were some serpiginous structures with hyperintensity within the tumors on gradient-echo and gadolinium enhanced T1-weighted images. Histologic examination revealed a picture of intermuscular angioma predominantly composed of cavernous lymphangioma.


Assuntos
Tecido Adiposo , Linfangioma/diagnóstico , Imageamento por Ressonância Magnética , Braço/fisiopatologia , Tecido Conjuntivo , Humanos , Masculino , Pessoa de Meia-Idade
15.
Clin Imaging ; 30(1): 66-8, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-16377490

RESUMO

Tumoral calcinosis-like metastatic calcification in a patient with uremia on dialysis has rarely been reported in the radiological literatures. This report describes the radiographic, scintigraphic, ultrasound, and CT findings of this condition in a 54-year-old man who had a clinical history of renal dialysis for 6 years. Elevation of serum phosphate and parathyroid hormone levels was noted. Physical examination revealed a hard, movable, and tender mass over his left arm. Plain radiographs of the left shoulder showed an amorphous massive calcification in the upper arm. Scintigraphy showed increased tracer accumulation in the soft tissue of the proximal portion of the left arm and both thighs, where CT scan revealed multilocular, amorphous, calcified masses in these areas. Scintigraphy can help in screening multiple lesions, and CT scan may further help in identifying the extent of a localized lesion such as joint involvement. Ultrasound showed localized multiloculated fluid accumulation within hyperechoic masses and perifocal interstitial fluid collection, which can help to determine the activity of the lesion. Ultrasound findings of tumoral calcinosis have not been reported before.


Assuntos
Calcinose/diagnóstico , Hiperparatireoidismo/complicações , Diálise Renal/efeitos adversos , Neoplasias de Tecidos Moles/diagnóstico , Braço/diagnóstico por imagem , Calcinose/etiologia , Distúrbio Mineral e Ósseo na Doença Renal Crônica/complicações , Humanos , Masculino , Pessoa de Meia-Idade , Metástase Neoplásica , Neoplasias de Tecidos Moles/etiologia , Tomografia Computadorizada por Raios X , Ultrassonografia , Uremia/complicações
16.
Clin Imaging ; 29(2): 134-7, 2005.
Artigo em Inglês | MEDLINE | ID: mdl-15752970

RESUMO

Malignant fibrous histiocytoma (MFH) of the breast is very rare. Sonographic findings of MFH of the breast have not been reported before. We herein report a case of a 46-year-old woman with a histologically proved MFH of her right breast. Ultrasound examination revealed a 6-cm tumor mass with solid and cystic components, which were attributed after histological examination to hypercellularity and hemorrhage within the tumor. Histopathological diagnosis was compatible with MFH of the breast.


Assuntos
Neoplasias da Mama/diagnóstico por imagem , Histiocitoma Fibroso Benigno/diagnóstico por imagem , Mama/patologia , Neoplasias da Mama/patologia , Feminino , Histiocitoma Fibroso Benigno/patologia , Humanos , Pessoa de Meia-Idade , Ultrassonografia
17.
Skeletal Radiol ; 33(8): 485-7, 2004 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-15138724

RESUMO

Osseous hemangiopericytoma is rare. We present a case of a 30-year-old woman with low-back pain with radiation to the left buttock for 1 month. Magnetic resonance imaging (MRI) showed a tumor mass with areas of serpentine signal void pattern in the sacrum suggestive of a vascular tumor. Neither calcifications nor layered blood serum were noted. Histological diagnosis was compatible with osseous hemangiopericytoma.


Assuntos
Hemangiopericitoma/diagnóstico , Imageamento por Ressonância Magnética , Sacro , Neoplasias da Coluna Vertebral/diagnóstico , Adulto , Diagnóstico Diferencial , Feminino , Humanos , Sacro/patologia
18.
AJR Am J Roentgenol ; 182(5): 1119-22, 2004 May.
Artigo em Inglês | MEDLINE | ID: mdl-15100105

RESUMO

OBJECTIVE: We aimed to evaluate the appearance of chest radiographs in patients with severe acute respiratory syndrome (SARS) and correlate these findings with clinical outcomes. MATERIALS AND METHODS: We retrospectively reviewed the initial radiograph and a series of follow-up chest radiographs in 26 patients who had symptoms and signs consistent with SARS. Twenty-five patients completed the full course of radiographs in the hospital. The initial radiographic features and the distribution of parenchymal, mediastinal, and pleural abnormalities for each patient were evaluated. Follow-up radiographic findings were correlated with clinical outcomes for these patients. RESULTS: Initial chest radiographs showed abnormalities in 23 (88%) of 26 subjects. Eighteen patients (69%) had air-space consolidation, two (8%) had ground-glass attenuation, one (4%) had nodules, and two (8%) had mixed consolidation and nodules. Four patients (15%) had pleural effusion. Younger patients and those with normal initial radiographic findings or unifocal lung lesions had better outcomes. CONCLUSION: The initial predominant radiographic feature of SARS was air-space consolidation in the lateral and lower lung zones. Progressive deterioration to diffuse unilateral or bilateral consolidation in the series of follow-up chest radiographs is associated with a poor prognosis.


Assuntos
Síndrome Respiratória Aguda Grave/diagnóstico por imagem , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Radiografia , Estudos Retrospectivos
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...