Volumetric imaging in a radiation therapy device

摘要

#CMT# #/CMT# A radiation therapy unit volumetric imaging procedure rotates (4) a patient on a couch (3) steadily about an axis through the radiation therapy unit isocentre (5) at an angle to the beam whilst taking and storing X ray images (1, 2) for computer (6) generation of a volumetric image dataset. #CMT# : #/CMT# Independent claims are included for computer programs implementing the procedure. #CMT#USE : #/CMT# Volumetric imaging procedure for radiation therapy units. #CMT#ADVANTAGE : #/CMT# Does not require encroachment on the therapy unit and can be retrofitted to existing equipment. Rotation of the patient avoids rotation of the heavy therapy unit. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows the X ray therapy unit during imaging. 1, 2 : X ray images 3 : Couch 4 : Axis of rotation 5 : X ray treatment unit isocentre 6 : Computer.