Collimator with variable exposure field

• Main Authors: LI CHAO, YAO JIN, XIONG DUANPING, WEI CHONGGAO, CHEN WEIMING, WU DAKE
• Format: Patent
• Language: Chinese; English
• Published: 12.06.2013
• Subjects: ELECTROTHERAPY; GAMMA RAY OR X-RAY MICROSCOPES; HUMAN NECESSITIES; HYGIENE; IRRADIATION DEVICES; MAGNETOTHERAPY; MEDICAL OR VETERINARY SCIENCE; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PHYSICS; RADIATION THERAPY; TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOTOTHERWISE PROVIDED FOR; ULTRASOUND THERAPY

The utility model belongs to a collimator with a variable exposure field in the field of medical equipment. The collimator is composed of a frame housing (1) and blocks (4). The collimator is characterized in that a rolling disc (2) is arranged on the frame housing (1), is in revolute joint connection with the frame housing (1) and can move forwardly and backwardly relative to the frame housing (1) under the drive of a motor; the rolling disc (2) is connected with projections (5) on transverse planes of the blocks (4) via curve clamping grooves (3) or a linkage mechanism; the blocks (4) are structured by multiple layers that are mutually staggered so as to form a collimator exposure field (6); and the blocks (4) are in sliding connection with the frame housing (1). The collimator with the variable exposure field, brought forward by the utility model, has a simple structure and enables the exposure field of the collimator to be changed in a real-time manner only through one drive during radiation treatment.