Patent ID: 7634057

Claim:
A radiotherapy system comprising: a collimator operable to shape and steer a radiation beam in at least two dimensions; a turntable for supporting a patient thereupon adapted to rotate the patient about a rotational axis, the patient having a target therein for irradiation by said radiation beam, wherein said turntable is mounted on a movable cart; a detector adapted for measuring a position of said target relative to said radiation beam, said detector comprising an accelerometer operative to sense and measure movement of the patient and said target that moves together with movement of the patient; and a processor adapted to receive target positional data from said detector, said processor being in communication with said collimator for causing said collimator to steer said radiation beam in a direction to said target, and wherein said processor is operative to process said target positional data to position said movable cart to adjust the position of the patient and the target with respect to the radiation beam.