Multiple liver amoebic abscesses detected on FDG PET/CT.

We report a case of liver amoebic abscesses in a 58-year-old man referred for a FDG PET/CT with an initial diagnosis of secondary hepatic lesions. This patient, coming from Sri Lanka, presented with fever and shivers, pain in the right flank, vomiting, and diarrhea for a month. The FDG PET/CT showed a hepatic heterogeneous uptake with multiple cold lesions surrounded by a faint hypermetabolism.

Ventricular tachycardia reveals cardiac infiltration due to mediastinal lymphoma.

A 61-year-old man was referred to us for palpitations and ventricular tachycardia. After being treated by chemotherapy for a mediastinum lymphoplasmocytic lymphoma, a ventricular tachycardia (VT) occurred. It was well tolerated.

Comparison between factor analysis of dynamic structures and Fourier analysis in detection of segmental wall motion abnormalities: a clinical evaluation.

To evaluate Factor Analysis of Dynamic Structures (FADS) versus or in association with other methods, a protocol was set up including as 'gold standard' investigation the left ventricular angiography (LVA) and processing by Fourier Analysis (FA), and FADS with different variants. To refine the diagnosis of Regional Wall Motion Abnormalities (RWMA), processing was done on a sectorial basis for more accurate spatial localization and functional description. 53 patients were studied (8 normal, 45 with coronary artery disease).

Radionuclide evaluation of cardiac function during sleep in children with bronchopulmonary dysplasia.

The influence of sleep on cardiac function in severe bronchopulmonary dysplasia was assessed in five children 1.5 to 5 years of age. Left and right ventricular ejection fractions (LVEF and RVEF) were investigated by equilibrium radionuclide ventriculography in five children undergoing polygraphic monitoring during the different states of alertness: wakefulness, nonrapid eye movement sleep, and rapid eye movement sleep.

Automated processing of first-pass radionuclide angiocardiography by factor analysis of dynamic structures.

A method for automatic processing of cardiac first-pass radionuclide study is presented. This technique, factor analysis of dynamic structures (FADS) provides an automatic separation of anatomical structures according to their different temporal behaviour, even if they are superimposed. FADS has been applied to 76 studies.

[Tomodensitometry and cerebral scintigraphy. Respective indications].

The comparative values of computerized tomography and radionuclide scan for the diagnosis of brain lesions were assessed on a series of 550 patients. A number of indications for each of these two methods have emerged from our results and from those found in the literature. The biases encountered in this type of study are discussed, and a "decision-making flow-chart" is proposed.

Factor analysis in gated cardiac studies.

Factor analysis of dynamic structures (FADS) can automatically provide "physiological" factors related to anatomical structures that have different temporal behavior, even if these structures overlap; it also yields images corresponding to the factors' spatial distributions. In normal patients, two significant cardiac factors, corresponding to the atria and the ventricles, may be extracted. A third significant factor can be obtained when additional dynamic structures exist.

Bone scintigraphy in Perthes disease.

After intravenous injection of 99mTc methyldiphosphonate, 190 hip bone scans were performed on 103 children. In 64 children with Perthes disease, 61 of 71 hips (86%) showed abnormal scintigraphy. There were no false positives.

Thallium uptake in fasted and nonfasted rats.

Thallium uptake was studied in selected organs in two groups of rats: fasted and nonfasted. A significant increase in thallium uptake was found in the stomach and the small intestine after eating while a significant decrease was found in the lung.

Bone scintigraphy in the diagnosis and follow up of Perthes' disease.

One hundred and thirty three children were studied (a total of 218 scintigrams) after IV injection of 100 microCi/kg 99Tc-MDP. Of 64 pathological hips (6 being bilateral), 52 were judged typically abnormal, 8 without initial radiological evidence. Of the rest, 8 were considered doubtful and 4 normal.

Performance characteristics of a commercial ECG gate.

A commercial ECG gate was tested to evaluate its ability to predict accurately the time of end-systole. The predicted times followed the manufacturer's specifications quite well. These times were compared with the actual times of end-systole as determined by computer-derived left-ventricular time-activity curves using Tc-99m-labeled red blood cells.

[Extra-intracranial arterial bypasses. Evaluation of their permeability by use of the Doppler effect].

40 temporo-sylvian anastomoses were controlled using Doppler ultrasonic examination. The results are compared to post-operative arteriograms. The Doppler examination has proved to be highly accurate when compared to contrast arteriography in the survey of extra-intracranial anastomosis.