Keywords:
Oncology, Cone beam CT, Dosimetry, Cancer
Authors:
N. Mitina, T. Peterson, R. Guidi, C. Hargrave
DOI:
10.26044/ranzcr2023/C-285
Results
Literature review:
The systematic literature review employed a key word search including the following; ‘stereotactic spine radiotherapy conformity index’ and ‘stereotactic spine radiotherapy conformation’. The review (Figure 5) identified four suitable articles [2,3,4,5]. Only articles that included the Paddick Conformity Index were included. These articles confirmed significant discrepancy in reported CI and GI values for SBRT spine treatment plans. Only one study [2] reported results for Cervical, Thoracic and Lumbar spine treatments separately. Published mean CI and GI values in these articles ranged from 0.52 to 0.89 and 2.87 to 6.76 respectively. Furthermore, there was some discrepancy in PTV delineation and expansions with one study reporting a GTV to PTV expansion of 3mm, without including a CTV making this study unusable for comparison. This significant variation in the reported results and PTV delineation as well as low number of included cases, severely limit the usefulness of comparing our results to the published data.
Treatment Plan Data: