UNIVERSAL TEST-OBJECT FOR MONITORING OF X-RAY AND COMPUTER CT SCANNERS PARAMETRES AND CHARACTERISTICS CONSTANCY Russian patent published in 2010 - IPC A61B6/03 G01D18/00 G01N29/30 

FIELD: metering equipment.

SUBSTANCE: invention is related to X-ray diagnostic equipment and is intended to monitor constancy of parametres and characteristics of X-ray and computer CT scanners. Test object comprises body made of Perspex in the form of hollow cylinder, installed horizontally on supports, internal cavity of which is separated by partition into sections, one of which is filled with water, and the other one contains inserts having groups of openings with various diametre and tungsten wire installed in parallel to longitudinal axis of body cylinder symmetry. One of inserts is arranged in the form of solid cylinder made of Perspex, where tungsten wire is melted in parallel to axis of insert cylinder symmetry, with displacement from it upward along vertical line. One base of insert cylinder is rigidly fixed on partition with displacement of its longitudinal axis of symmetry upwards along vertical line versus longitudinal axis of body cylinder symmetry, and tungsten wire is installed at the distance of 20-30 mm from longitudinal axis of body cylinder symmetry. On the other base of insert cylinder there is holder fixed rigidly, free base of which is truncated at the angle of 60°-70° versus longitudinal axis of body cylinder symmetry, and another insert is installed on it, being arranged in the form of detachable flat aluminium plate of rectangular shape with thickness of 0.5-1.0 mm, comprising groups of through holes with diametre of 0.5; 0.7; 1.0; 1.5 and 2.0 mm, which are provided along its whole surface. On external side surface of cylinder there are marks applied, three of which are arranged in the form of straight line sections matched with generatrices of body cylinder along its full length, and arranged accordingly, as one in upper part of body cylinder, and two other - at its sides in mutually perpendicular longitudinal planes of body cylinder symmetry. Two other marks are arranged along full length of body cylinder circumference and are installed, accordingly, one in the middle of body section filled with water and other in the second section of body directly above middle of insert cylinder. On body there are the following components provided - rigidly fixed cover on the side of water-filled section, and detachable cover - on the side of section with inserts.

EFFECT: invention expands arsenal of test objects of X-ray computer CT scanners.

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