METHOD FOR PRE-RADIAL KNEE JOINT TOPOMETRY FOR ORTHOVOLTAGE X-RAY THERAPY IN DEGENERATIVE-INFLAMMATORY DISEASES Russian patent published in 2019 - IPC A61N5/10 

FIELD: medicine.

SUBSTANCE: invention relates to radiation therapy, and can be used for pre-radial topometry of knee joint for carrying out orthovoltage X-ray therapy in degenerative-inflammatory diseases. Computed tomography is performed to determine a topography of articular clefts of the knee joint and a depth of administering the dose with a scanning interval of 1.25–2.5 mm. That is ensured by first placing the patient on the right side and then on the left side. Knee flexion angle 10–15°. Maximum width of the joint space for patellofemoral and thybofemoral joints for the medial and lateral sides is determined on the scans. For patellofemoral joint, a line is drawn along its articular surfaces and distance AB is calculated from point A located on skin surface to point B located in the centre of patellofemoral joint at maximum depth. To control subsequent laying, perpendicular to table surface is made from point B and distance BC is measured, where C is point on table surface. Line perpendicular to the lateral surface of the skin is drawn through a point E located at the centre of the tybio-femoral articulation at the maximum depth for the tybio-femoral articulation, and the distance DE from the point E to the point D on the skin surface is calculated. To control subsequent laying, perpendicular to table surface is made from point E and distance EF is measured, where F is point on table surface. Marking is applied from the medial and lateral sides on skin in points A and D for both joints. Obtained marking is used for orthovoltage X-ray therapy in degenerative-inflammatory diseases.

EFFECT: method ensures compliance with quality assurance of radiation therapy according to international recommendations (ESTRO, 2008, 2015) and national guidelines, significant reduction of radiation load on adjacent tissues and organs, accurate reproduction of stacking in each session of irradiation for a short period of time and control of laying accuracy during each session by creation of algorithm for determination of topography of articular joints of knee joint and depth of dose supply.

1 cl, 6 dwg