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Method for improved surface tracking-based motion management and dynamic planning in adaptive external beam radiation therapy

A treatment method and body surface technology, applied in X-ray/γ-ray/particle irradiation therapy, radiotherapy, treatment, etc., can solve the problems of low efficiency, incorrect prediction of target movement, harmful quantitative administration of surrounding normal tissues, etc. Achieve improved delivery gating

Active Publication Date: 2015-11-25
KONINKLJIJKE PHILIPS NV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Registration errors can then accumulate during treatment, leading to incorrect predictions of target motion for treatment delivery
Therefore, designing delivery gating schemes and dynamic disposition plans based on the tumor's original size and shape is not only inefficient but also leads to dosing that is detrimental to surrounding normal tissues

Method used

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  • Method for improved surface tracking-based motion management and dynamic planning in adaptive external beam radiation therapy
  • Method for improved surface tracking-based motion management and dynamic planning in adaptive external beam radiation therapy
  • Method for improved surface tracking-based motion management and dynamic planning in adaptive external beam radiation therapy

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Embodiment Construction

[0021] refer to figure 1 A treatment system 10 (eg, an external beam radiation therapy (EBRT) system) includes a pre-procedural imaging system 12 that generates a pre-procedural planning image 14 of a target of a patient 16 and normal tissue surrounding the target of the patient 16 . The surrounding normal tissue usually includes one or more organs at risk (OARs), and the target is usually the lesion to be treated, such as a tumor. Additionally, the pre-procedural planning image 14 can include the external body surface of the patient 16 adjacent to the target. For example, where the target is a tumor in the lung of patient 16 , the external body surface is the external chest surface of patient 16 .

[0022] The pre-procedure planning image 14 is typically four-dimensional (4D), where it typically includes a three-dimensional (3D) image for each of multiple points in time. This is in contrast to 3D images which only include a single time point. The multiple points in time ca...

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Abstract

A therapy system and method treats an internal target of a patient (16). A treatment plan (36) is received to treat the internal target. The treatment plan (36) includes a plurality of treatment fractions including correspondences (38) between the internal target and an external body surface based on a pre-procedural planning image (14) and pre- procedural tracking data (20). Before selected treatment fractions of the plurality of treatment fractions, a pre-fraction planning image (50) of the target is received, tracking data (20, 52) of the external body surface of the patient (16) is received, and the correspondences (38) between the internal target and the external body surface are updated based on the received pre-fraction planning image (50) and the received tracking data (20, 52). Therapy is delivered to the patient (16) in accordance with the treatment plan (36) and using the updated correspondences (38).

Description

technical field [0001] This application relates generally to external beam radiation therapy (EBRT). This application has particular reference to, and will be described with particular reference to, surface tracking based motion management and dynamic programming applications. However, it is to be understood that the present application is also applicable to other application scenarios and is not necessarily limited to the aforementioned applications. Background technique [0002] EBRT is delivered in multiple parts spanning many weeks, but is usually designed based on a single static treatment plan. Failure to account for intra-section motion (e.g. respiratory motion, cardiac motion, etc.) and inter-section motion (e.g. tumor shrinkage due to progressive radiation damage) may result in incomplete dose coverage to the target (e.g. Injury to normal tissue, surrounding normal tissue may include organs at risk (OAR). To ensure complete coverage of the target, margins are oft...

Claims

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Application Information

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IPC IPC(8): A61N5/10
CPCA61N5/1039A61N5/1037A61N5/1049A61B6/5264A61N5/1068A61N5/107
Inventor S·巴拉特K·卢
Owner KONINKLJIJKE PHILIPS NV
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