External beam radiotherapy and imaging with radioactive isotope

摘要

A method of delivering external radiation beams to a target volume in a body portion includes positioning a radioactive isotope source at a plurality of locations spaced apart around the body portion, and collimating radiation beams of the radioactive isotope source from the plurality of locations, whereby the target volume in the body portion is deposited with a predetermined dose distribution. A radiation device employs a member having a configuration adapted to surround a body portion to be irradiated. The member has a channel and a plurality of collimators spaced apart along and coupled to the channel. The plurality of collimators define a plurality of dwelling locations for a radioactive isotope source in the channel and are configured to collimate radiation beams of the radioactive isotope source.

主权项

1. A method of delivering external radiation beams to a target volume in a body portion, comprising the steps of:
positioning one or more radioactive isotope source(s) at a plurality of locations around the body portion; and collimating radiation beams of the one or more radioactive isotope source(s) from the plurality of locations, whereby the target volume in the body portion is deposited with a predetermined dose distribution; wherein the plurality of locations are coplanar and spaced apart substantially evenly along a generally circular orbit surrounding the body portion such that the collimated radiation beams are directed to the target volume from the plurality of the coplanar locations surrounding the body portion along the generally circular orbit and a combined dose deposited to the body portion has a dose distribution with a substantially lower dose at a skin surface of the body portion than in the target volume.