Following informed consent to treatment by cRA, the patient underwent 4D computed tomography for treatment planning performed with a SOMATOM Sensation Open CT scanner (Siemens) as well as a contrast-enhanced electrocardiogram (ECG)-triggered cardiac CT (SOMATOM Definition Flash, Siemens) for co-registration in the treatment planning system (Varian Eclipse version 15.5; Varian Medical Systems Inc. Paolo Alto CA, USA). A pre-specified internal target volume (ITV) for respiratory motion management was enlarged by 4 mm to result in the planning target volume (PTV), which consisted of 104 cm3. The treatment planning procedure and consideration of organs at risk followed the protocol of the RAVENTA study.9 (link) Target volume transfer from the electroanatomic mapping (see Supplementary material online , Figure S2 ) to the treatment planning system was accomplished using the CARDIO-RT software.10 (link) Dose distribution was calculated using the AAA/Acuros AXB algorithm and cRA was performed on a Varian TrueBeam STX in four non-coplanar volumetric modulated arcs using a 6 mV flattening filter-free photon beams.
Varian eclipse version
Manufactured by Agilent Technologies
Sourced in United States
The Varian Eclipse is a laboratory equipment product offered by Agilent Technologies. It is a compact and versatile instrument designed for analytical tasks in various scientific and research settings. The core function of the Varian Eclipse is to perform precise measurements and analyses, but a detailed description of its intended use or specific features is not available without the risk of bias or extrapolation.
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2 protocols using varian eclipse version
1
Multimodal Cardiac Radiotherapy Planning
2
Breast Cancer Radiotherapy Planning Protocol
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Dose distribution was calculated with a radiation therapy planning system, a Varian Eclipse version 15.1 (Varian Medical System) using Anisotropic Analytical Algorithm. For CTV of the whole breast, ESTRO guideline was considered and 5 mm from the body surface of the CTV (4 mm for the small sized breast less than 400 cc) was edited [13 (link)]. To delineate OARs of the heart and sub-segments (left ventricle (LV) and LAD) of heart, the report of cardiac contouring atlas by Duane et al. [14 (link)] was used as a reference. The ipsilateral lung was delineated with CT window level and width of 0/1000 HU. The prescribed dose was modified as 50 Gy with 25 fractions to all patients to cover CTV > 95% with prescribed dose > 95% without maximum CTV dose > 107%. The field-in-field technique using 6MV photon beams was made. For this study, delineation of the CTV and OARs and treatment plans were newly verified in consultation with two experienced radiation oncologists (Yoon and Rim).
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