Abstract
Purpose: The main purpose of this work is to investigate the optimal usage of X-ray volume imaging (XVI) system in image-guided radiotherapy with different gantry rotations in order to reduce scanning volume. Methods: A total of 60 scans of 16 individual patients with breast and head and neck cancer were used in this study. Full and partial gantry rotations were performed at the same time with same setup on the couch using XVI system by changing the preset information. The reference and localization images were matched with this system. The set up errors were evaluated with XVI software. Results: Variation in translational errors with full and half gantry rotations in breast cases were <2 mm in 86.6% of measurements. Similarly, variations between full and partial gantry rotations in head and neck cases were <1 mm in 95.5% of measurements. Results showed almost similar translational and rotational shifts in both full and partial gantry rotations in the majority of the cases. Conclusion: Based on selected cases in this study, partial rotation of the gantry for acquiring 3D cone beam computerized tomography (CBCT) is very useful option in reducing scanning volume and total treatment time in IGRT. However, the use of partial rotation of the gantry depends on patient thickness and area to be reconstructed to track anatomical changes near to the target.
Highlights
Reproducible positioning of the patient on the couch of a method in Image guided radiotherapy (IGRT) to localize the target volume based on treatment unit for radiation delivery is one of the main volumetric information obtained by X-ray volume requirements for the tumor control in radiotherapy
Process of obtaining cone beam computerized tomography (CBCT) image is same in both full rotation and partial rotation methods used in this study except the number of images obtained during gantry rotation
Imaging volume in partial rotation method will be less when compared with full rotation method
Summary
Reproducible positioning of the patient on the couch of a method in IGRT to localize the target volume based on treatment unit for radiation delivery is one of the main volumetric information obtained by X-ray volume requirements for the tumor control in radiotherapy. Treatment delivery system.[1] Cone beam computed Cone-beam provides the possibility to make a whole tomography (CBCT) integrated with linear accelerator volume scan in one single rotation of the XVI system for patient position verification is one of the major 3 around the patient in treatment position. Setup errors dimensional (3D) methods in image guidance.[2,3] can be corrected by adjustment of translational and rotational deviations between the reference image and
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