腹部癌の1.5テスラ磁気共鳴ガイド下直線加速器におけるオンライン適応計画における腹部圧迫の線量測定効果

Moghadaseh Khaleghibizaki^1,2, Angela Sobremonte³, Luis Perles¹

¹Departments of Radiation Physics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.

Physics and imaging in radiation oncology

|January 16, 2026

Abstract:

Compression belts (CBs) are sometimes used to reduce respiratory motion during stereotactic body radiotherapy of abdominal cancers with magnetic resonance (MR)-guided online adaptive planning. This study evaluated the dosimetric effects of overriding the relative electron density (ED) value of CBs in creating synthetic computed tomography (CT) scans for MR-guided adaptive planning. We evaluated plans for 12 patients with abdominal cancer and identified that ED values between 0.2 and 0.3 achieved the best approximation of CB ED in dose calculation. Our study presented an approach to estimate appropriate ED overrides for CBs in MR-guided online adaptive planning.

キーワード:

腹部圧迫電子密度オーバーライド MRガイド下適応放射線療法合成CT

さらに関連する動画

08:17

Dynamic Lung Tumor Tracking for Stereotactic Ablative Body Radiation Therapy

Published on: June 7, 2015

16.2K

08:54

Treatment of Liver Metastases Using an Internal Target Volume Method for Stereotactic Body Radiotherapy

Published on: May 8, 2018

14.9K

関連する概念動画

01:10

Computed Tomography

8.0K

Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...

8.0K