Motion management in mri-guided linac

Abstract

Described herein is a system and method of controlling real-time image-guided adaptive radiation treatment of at least a portion of a region of a patient. The computer-implemented method comprises obtaining a plurality of real-time image data corresponding to 2-dimensional (2D) magnetic resonance imaging (MRI) images including at least a portion of the region, performing 2D motion field estimation on the plurality of image data, approximating a 3- dimensional (3D) motion field estimation, including applying a conversion model to the 2D motion field estimation, determining at least one real-time change of at least a portion of the region based on the approximated 3D motion field estimation, and controlling the treatment of at least a portion of the region using the determined at least one change.

Description

[0001] priority claim [0002] This patent application requires Priority of U.S. Provisional Patent Application Serial No. 62 / 090,601, filed December 11, 2014, entitled "MOTIONMANAGEMENT IN MRI-GU1DED LINAC," by Hebert interest, the entire content of this application is incorporated herein by reference. technical field [0003] The present disclosure relates to medical systems, and more particularly to nuclear magnetic resonance or other imaging or radiation therapy systems. Background technique [0004] Radiation therapy (also called radiotherapy) is used in the treatment of cancer or other diseases. A linear accelerator ("linac") may be used in radiation therapy to direct a radiation beam at a desired location on a patient. A linear accelerator can direct photons (eg, as X-rays), electrons, or other subatomic particles at a target such as a cancerous tumor. For example, the radiation beam can be shaped to match the shape of the tumor by using a multi-leaf collimator (...

AI Technical Summary

Problems solved by technology

These methods may have the following limitations: 1) there may be significant out-of-plane motion, which may be difficult to localize using 2D slices; 2) slices are often target-centered, making it difficult to simultaneously track (multiple) OARs; Information is only collected in 2D slices during this period, which makes it difficult to perform dose calculations, e.g. offline retrospective calculations for dosimetry for adaptive radiotherapy (dose compensation utilizes full 3D information of patient anatomy over time)

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