Proscan is to make a lungs image. The register of X-ray radiation, which passed through the patient, unit ProScan uses a silicon linear detector. It has protect proper operation with majority of similar units need a three. High frequency generator is connected to a 220 V 10% single phase network with resistance up to 3 Ohm. X-ray protective cabin made of modern composite materials reduce personnel radiation exposure practically to the natural level. High competence of registration permits obtaining a direct short with 1% contrast resolution at only 100 mR in the patients plane for ProScan 2000 and at 250 mR for ProScan 70. It adds spatial resolution in the patients plane of 2.2 Lp/mm for ProScan 2000 3.2 Lp/mm for ProScan 70. The silic linear detector does not need periodic maintenance. It has specific features of ProScan 2000 and ProScan 70. Detector is being moved along the chest horizontally together with a sector shaped x ray formed by the slit diaphragm.