[en] Authors' experience in the examination of myocardial perfusion by single photon emission computed tomography (SPECT) is presented. Surveys of radionuclides used, load protocols, accumulation protocols and data evaluation are given. The sensitivity and specificity of myocardial SPECT are discussed with emphasis on the most frequent causes of false negative and false positive findings. Economic aspects are also mentioned, and possible future trends in this diagnostic technique are suggested

[en] A software package using Monte Carlo methods has been developed for the simulation of x-ray mammography. A simplified geometry of the mammographic apparatus has been considered along with the software phantom of compressed breast. This phantom may contain inhomogeneities of various compositions and sizes at any point. Using this model one can produce simulated mammograms. Results that demonstrate the validity of this simulation are presented. (authors)

[en] This hospital based study was undertaken to determine the commonest radiological features of childhood pulmonary tuberculosis in Khartoum, and to correlate these features with the clinical symptoms and laboratory investigations. A total of hundred patients were selected from referred clinics and the paediatric wards (inpatients) of three teaching hospitals in Khartoum, during the period february 95 to april 96. Almost all the families were from low socio economic status. The peak age incidence was at (7, 8, 10) years; 50% of children had received BCG vaccination and history of contact with TB was positive in 35%. Mantoux test was positive in 79% and four cases had smear-positive sputum for AAFB. The most frequent lesion on chest radiography was lemphadenopathy in 67% of cases followed by multiple lesions which were present in 65% of cases. Consolidation was present in 49 cases , 38 showed unilateral changes, while 11 showed bilateral changes. The right and particularly the right middle and lower lobes were more frequently affected. Seven patients had pleural effusion which was sided in five, left sided in one and bilateral in one. Cavitation was present in eight cases, broncho-pneumonic changes in three and only one case had miliary mottling. Positive mantoux test and chest x-ray were present in 72 patients, while all cases with negative mantoux and negative sputum smear showed significant radiological findings. (Author)

[en] This is a study to evaluate the use of computed tomography in the diagnosis of intracranial S.O.Ls in 100 consecutive patients in a period of 5/12/93-25/12/1994. Data was obtained from history, clinical examination, fudoscopy, plain skull x-ray and CT, the frequency of 25 variables were studied, data analysis was done using a computer. The statistical programme EPI version 6 was used in data analysis. Females constitute 53% and males 47%. The age ranged from 17 to 80 years. The majority of patients were in the range of 20-45 years compared to 55-65 years in the western countries. Central tribes constituted 46% of the population in then study. The common presenting symptoms were headache (83%), fits (53%) visual disturbance (52%), vomiting (21%), ataxia (6%) and deafiness (3%). Frequency of abnormal finding in plain skull x-ray was (21%). Frequency of bilateral papillodema was (42%) and (5%) unilateral papillodema. CT was normal in 29%, 20% glioma, 17% meningioma, 8% metastases, 5% pituitary adenoma, (6%) infections (tuberculoma, pyogenic abscesses and hydatid cyst) and (15%) were others. (Author)

No abstract available

No abstract available

No abstract available

No abstract available

No abstract available

No abstract available