[Detectability of pulmonary coin lesions: a comparative assessment of the image quality of a storage phosphor system and a conventional film screen system].

The object of this study was to compare the prototype of a storage phosphor digital radiography system (Siemens) which allows postprocessing image data adjustment with the stored information, with an optimised conventional film system with respect of image quality and diagnostic accuracy. The test objects were pulmonary coin lesions as the search for primary or secondary lung tumours is one of the most frequent clinical requests and the detectability of coin lesions depends very much on their relative contrast against the surrounding area. In order to achieve reproducible results, an anthropomorphic lung phantom was used.

[Economics and efficacy of the use of contrast media].

Data collected on side-effects of nonionic contrast media during the last couple of years agree in respect of lowering of adverse reactions in comparison to ionic contrast media. Statistic valuation of the different studies has been discussed controversially, but better results cannot be expected in the near future for data-collecting reasons: The data available so far suggest the application of nonionic contrast media. Economic reasons may postpone the change from ionic to nonionic contrast medium.

[Results of percutaneous transluminal angioplasty].

Percutaneous transluminal angioplasty (PTA) can be subdivided into three epochs: 1. from its inception by Dotter and Judkins up to the first coronary artery stenosis dilatation with the Grüntzig balloon catheter system; 2. from the introduction of coronary stenosis dilatation by Grüntzig up to its unequivocal acceptance; 3.

Digital transvenous angiography in follow-up examinations after carotid reconstruction: early results.

A total of 187 check-up examinations by DVSA were carried out after various types of carotid reconstructions. The results were inconclusive in only 2.7% of the cases.