Image guided radiation therapy apparatus

摘要

An IGRT apparatus includes a medical imaging device integrated with a linear accelerator, the linear accelerator is configured for emitting a radiation beam, which is shaped by a beam shaper, and a gantry. The position of the beam shaper is adjustable between a first position and a second position; the first position is a treatment position and the second position is a non-treatment position and the first position is within the gantry and the second position is removed from the gantry.

主权项

1. An image-guided radiation therapy (IGRT) apparatus, comprising:
a medical imaging device integrated with a linear accelerator, the linear accelerator configured for emitting a radiation beam which is shaped by a beam shaper; a gantry configured to rotate the emitted radiation beam about an axis; and wherein the beam shaper is mounted to an adjustment arm configured to rotatably adjust the beam shaper between a first position and a second position, wherein the first position is a treatment position and the second position is a non-treatment position, wherein the first position is within the gantry and the second position is outside the outer circumference of the gantry, and wherein the medical imaging device is an MRI device generating a magnetic field, and the second position is a radial distance away from the magnetic field such that a magnetic field strength generated by the MRI device at the second position is lower than a magnetic field strength generated by the MRI device at the first position.