A Test Device for Radiodiagnostic Systems

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Abstract
The fol-iowing requirements for test devices to investigate radiodiagnostic procedures are presented. The contrast of the test device should be within the diagnostic range and resemble biological contrasts; the nest units have to be arranged discontinuously and at random; the test device should be 3-dimensional; the study of movement should be possible; the movements should preferably mimic biological movements. A test device in accordance with these requirements was built of 2 plates copied from the visual acuity test tables. In addition to the discontinuity and the suitable contrast of the test device, spatiality and the effect of movement were studied. An experiment was carried out to investigate the effect of geometric enlargement. The results are discussed and so are the prospects for further development of artificial devices, investigations employing experimental animals and applications in human subjects.

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