Patent ID: 8005190
Filing Date: 2011-08-23
Classification: A61N

Abstract:
1. A radiotherapy apparatus controller comprising: a portal image taking unit configured to take a first transmission image, in which a marker member positioned at a predetermined position is shown, by using therapeutic radiation and an imager; a gantry position collector configured to collect a first gantry position at which a gantry is positioned when said first transmission image is taken from a sensor measuring a position at which said gantry is positioned, said gantry supporting said imager and a therapeutic radiation radiating device which radiates said therapeutic radiation; a marker position calculator configured to calculate a first marker position at which said marker member is shown in said first transmission image; and a marker position table generator configured to update a marker position table, which correlates a plurality of gantry positions with a plurality of marker positions, so that said first gantry position corresponds to said first marker position.