Localized prostate cancer with intermediate- or high-risk features treated with combined external beam radiotherapy and iodine-125 seed brachytherapy.

OBJECTIVE: The aim of the study is to compare the results of the combined external beam radiotherapy (EBRT) with iodine-125 seed brachytherapy vs. brachytherapy alone for prostate cancer treatment in patients with intermediate and high risk of disease recurrence. METHODS AND MATERIALS: Ninety-six patients were treated from January 1998 to December 2006. Twenty-four patients received combined treatment and 72 patients received brachytherapy alone. Patients were classified into intermediate or high risk of recurrence according to the D'Amico's classification. The prescribed dose for brachytherapy was 145Gy as monotherapy and 110Gy for combined treatment. The dose of EBRT was 45Gy over 5 weeks, with 1.8Gy daily fractions. Results were analyzed based on Phoenix definition of biochemical recurrence, that is, nadir plus 2ng/mL. RESULTS: Biochemical control was achieved by 96% (23 of 24) of patients receiving combined treatment and by 72% (52 of 72) in the group treated by brachytherapy alone (p<0.015). The addition of EBRT resulted in a 94% biochemical disease-free survival at 5 years; and in brachytherapy alone group, the rate was 54% (p<0.011). Mean followup was 96 months (24-132 months; confidence interval 95%: 90-102). CONCLUSION: This study shows that in patients with localized prostate cancer, with intermediate and high risk of biochemical recurrence, the addition of EBRT can confer a significant biochemical control advantage when added to brachytherapy.

Accuracy of magnetic resonance imaging compared with computed tomography for implant planning.

AIM: The objective of this study was to evaluate the reliability of magnetic resonance imaging (MRI) compared with computed tomography (CT) for dental implant planning in respect to bone measurements. METHODS: Five dry mandibles were submitted to MRI and CT examinations. Each mandible had three specific sites identified with markers, in a total of 15 sites to be studied. The images provided by the MRI and CT examinations were delivered to four specialists in Oral and Maxillofacial Radiology to measure the bone height at the specific sites. Subsequently, the bone height of the dry mandibles was directly measured in the determined sites. The measurements obtained by the specialists in MRI and CT images were compared with the measurements obtained directly from the dry mandibles using the ANOVA test with a 0.05 significance level. RESULTS: The differences between the measurements obtained directly from the dry mandibles and the measurements from the MRI exams varied from 0.13 to 1.67 mm, with 10 sites being overestimated in MRI exams and five sites being underestimated. The differences between the measurements from the dry mandibles and CT exams varied from 0.02 to 1.25 mm, with nine sites being overestimated in CT exams and six sites being underestimated. The differences between the measurements from the MRI and CT exams varied from 0.03 to 1.00 mm, with nine sites giving higher values in MRI exams and six sites giving higher values in CT exams. There were no statistically significant differences between the three grous of measurements (P=0.98). CONCLUSION: The MRI, when compared with CT, shown to be reliable in respect to bone measurements for dental implant planning.

Comparaçäo entre a ortopantomografia e a tomografia computadorizada no planejamento de implantes / Comparison between the orthopantomography and computed tomography for implant planning

O presente estudo avaliou-se as ampliaçöes verticais produzidas nas radiografias panorâmicas, comparando-as com as medidas obtidas em exames de tomografia computadorizada, utilizando o "Denta Scan". Foram escolhidas as regiöes das arcadas, denominadas sítios, que pudessem ser identificadas nos dois exames, mensuradas e comparadas. Foram incluídos no estudo 33 pacientes com o total de 90 sítios analisados (47 na maxila e 43 na mandíbula) e as medidas encontradas foram submetidas ao teste t de Student para valores pareados. Foram encontradas diferenças estatisticamente significativas (P<0,05) entre as medidas da panorâmica e da tomografia computadorizada em ambas as arcadas

Produção de material instrucional para o ensino da radiologia por meio da digitalização de imagens / Development of educational material for radiology teaching using image digitalization

Criou-se um banco de dados usando a digitalização de imagens radiográficas para salvá-las da deterioração do tempo e, também, tornar mais ágil sua manipulação pelos profissionais que as utilizam. Foi criado um banco de dados que torna possível o armazenamento dos dados clínicos de cada paciente e, vinculadas a esses dados, suas respectivas imagens digitalizadas, com o propósito de ensino e pesquisa. Os elementos que compõem o banco de dados foram determinados por meio de pesquisa feita com os professores do Departamento de Radiologia da Universidade Federal do Rio de Janeiro. Conseguiu-se elaborar um sistema que contém dados e imagens, de baixo custo e de fácil manipulação por parte dos usuários.

Síndrome de Hughes-Stovin: relato de um caso / Hughes-Stovin syndrome: a case report

Relata caso de paciente que desenvolveu hipertensäo intracraniana por trombose do seio digital. Evolui, meses depois, com embolia pulmonar e trombose venosa profunda do membro inferior direito. Ocorreu óbito por hemoptise maciça. Na avaliaçäo radiológica do tórax, realizada por meio de telerradiografias, tomografia linear, tomografia computadorizada e arteriografia pulmonar, ficou caracterizada a presença de aneurismas das artérias pulmonares, bilateralmente