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However, at least one difficulty that arises is that the LINAC could potentially collide or nearly collide with the patient's skin surface at an off-normal tilt of the curved rail with respect to the longitudinal axis.
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[0047] Systems, methods, and associated computer program products for image-guided radiation therapy (IGRT) are further described below, including image-guided radiation therapy (IGRT) systems that provide an advantageous combination of high mechanical stability, radiation Versatility during delivery, outdoor configuration, and the ability to keep the patient stationary between the time of (i) pre-treatment imaging and / or setup imaging and (ii) treatment delivery including in-treatment imaging. In a preferred embodiment, there is provided a radiotherapy apparatus comprising: an annular gantry having a central opening; a radiotherapy head connected to the annular gantry a frame and rotatable at least 180 degrees arc around the central opening; and a stage translation mechanism configured to translate the annular stage in a direction extending through the longitudinal axis of the central opening . In a preferred embodiment, the annular gantry is contained within an annular gant...
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Abstract
The invention describes a radiation treatment device and a method for performing an image-guided radiation therapy (IGRT) on a body part of a patient. The radiation treatment device includes a ring gantry having a central opening; a radiation treatment head coupled to the ring gantry that is rotatable around the central opening in at least a 180 degree arc; and a gantry translation mechanism configured to translate the ring gantry in a direction of a longitudinal axis extending through the central opening.
Description
[0001] This application is a divisional application of a Chinese invention patent application with an application date of January 10, 2012, an application number of 201280010985.5, and an invention title of "radiation therapy delivery system with a ring gantry". [0002] Cross References to Related Applications [0003] This application claims the benefit of U.S. Provisional Application No. 61 / 434,824, filed January 20, 2011, and U.S. Application Nos. 13 / 088,289 and 13 / 088,321, both filed April 15, 2011, all of which are for all purposes Incorporated herein by reference. The subject matter of this patent specification is related to that of the following commonly assigned applications: U.S. Application No. 13 / 033,571, filed February 23, 2011; U.S. Application No. 13 / 033,584, filed February 23, 2011; International Application No. PCT / US11 / 25936, filed June 8, 2010; U.S. Provisional Application No. 61 / 352,637, filed June 8, 2010; U.S. Provisional Application No. 61 / 371,732, filed ...
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