Positron emission tomography: a technical introduction for clinicians.

Up to a few years ago, positron emission tomography (PET) was known as a very expensive research tool using positron emitting radiopharmaceuticals to study metabolic processes in vivo. Recent developments in detector technology enabled the detection of the distribution of positron emitting radionuclides inside the human body through dual-headed gamma camera systems. These much cheaper cameras did move the focus of PET from research to clinical applications.

[Gamma-chamber control of patients with Fraley syndrome].

Forty patients with Fraley syndrome were examined via "radioisotopic method for sector investigation of renal function" and the patients were grouped into 5 groups according to the results obtained. It was stressed that via the method used in patients with Fraley syndrome, an effective control could be carried out of the urodynamic disturbances and their effect on the vitality of the respective nephron population; the information obtained objectivizes the pathological deviations hence modelling the therapeutic behaviour.

[201T1 study of regional myocardial perfusion using a gamma counter and the EC1020 computer].

Myocardial perfusion was followed up after 500-1000 muCi 201TI-chloride injection at a gamma camera Pho-Gamma HP, Nuclar, Chicago with 4060 channel analyser and the images, according to the programmes of the authors, were processed with a computer type EC 1020. Some of the patients were examined by removing the detector, aiming at magnifying of the image and enhancing the differentiation ability under I cm. In some borderline cases, the patients were examined under physical loading and at rest for the differentiation of the normal from the disperfusion myocardial zones.