System for delivering conformal radiation therapy while simultaneously imaging soft tissue

摘要

Devices and processes for performing magnetic resonance imaging of the anatomy of a patient during radiation therapy to measure and control the radiation dose delivered to the patient.

主权项

1. A radiation treatment system, comprising:
a radiation therapy beam source configured to deliver ionizing radiation to a patient having moving tissues during a treatment fraction; a magnetic resonance imaging system configured to acquire a sequence of 3D images of patient anatomy fast enough to capture intra-fraction organ motions; a controller in communication with the radiation therapy beam source and the magnetic resonance imaging system such that the controller can substantially simultaneously
a) control the radiation therapy beam source to deliver ionizing radiation to the patient; andb) control the magnetic resonance imaging system to acquire the sequence of 3D images of patient anatomy; and a processor configured to determine an actual dose deposition in the patient from the sequence of 3D images of patient anatomy and the delivered ionizing radiation by summing doses delivered to the moving tissues of the patient over at least a portion of the treatment fraction.