Patent ID: 9616249
Date: 2017-04-11
CPC Classifications: A61B,A61N,G16H

Claim:
1. A radiotherapy control apparatus, comprising: a single fluoroscopic imaging device adapted to emit radiographic radiation; a fluoroscopic image acquisition unit adapted to acquire a fluoroscopic image of three or more markers implanted in the body of a patient, the fluoroscopic image being a single image that is taken by the radiographic radiation, which is emitted from the single fluoroscopic imaging device while the patient is in a radiotherapy, and in a single view of the fluoroscopic image acquisition unit; a projection line calculation unit adapted to identify projected positions of the respective markers on the fluoroscopic image and calculate equations of respective projection lines linking together these projected positions and a focus position of the fluoroscopic imaging device; an inter-marker distance acquisition unit adapted to acquire inter-maker distances between each pair of the markers; a marker position calculation unit adapted to calculate current positions of the respective markers based on the equations of the projection lines and the inter-marker distances; and a therapeutic radiation emission determination unit adapted to determine whether to emit therapeutic radiation based on the current positions of the respective markers.