The ability to compute CBCTeLFOV-based treatment plans equivalent to re-CT promises a potential improvement in IGART practice.Ĭomputational complexities encountered in craniospinal irradiation (CSI) have been widely investigated with different planning strategies. Utilization of CBCTeLFOV proves to be clinically appropriate and enables accurate prediction of geometric and dosimetric consequences within the planned course of treatment. Moreover, a similar and consistent pattern of results was also observed using deformed image data (initial planning CT deformed to CBCTeLFOV) with extended longitudinal projection and the same frame-of-reference as that of the CBCTeLFOV. Dosimetric analysis of the CBCTeLFOV-based adaptive re-plans showed excellent agreement with re-CT based re-plans. In patient studies, the dice-similarity-coefficient evaluation showed a good association (>0.9) between re-CT and CBCTeLFOV. Slice geometry, spatial resolution, line profiles and HU accuracy in the overlapping regions of the CBCTeLFOV yielded identical results when compared with reference CBCT.
Jstock indicator scanner registration#
Moreover, the efficacy of the CBCTeLFOV image data in deformable registration was also described. Segmentation accuracy/association between repeat CT (re-CT) and CBCTeLFOV was evaluated. Two case studies were used to illustrate the CBCTeLFOV-based IGART workflow in terms of dosimetric and clinical perspectives. Systemic validation was performed to evaluate the geometric and Hounsfield Units accuracy at the overlapping regions of the CBCTeLFOV using a Catphan®-504 phantom.
Jstock indicator scanner software#
cone beam abutment) and fused as a single DICOM set (CBCTeLFOV) using a custom-developed software script (coded in MatLab®) for extended localization. The protocol acquires two CBCT scans with a linear translation of treatment couch in the patient plane, allowing a 1 cm penumbral overlap (i.e. To investigate the efficacy of using cone beam CT with extended longitudinal field-of-view (CBCTeLFOV) for image guided adaptive radiotherapy (IGART).
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