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ORIGINAL ARTICLES
Year : 2022  |  Volume : 5  |  Issue : 1  |  Page : 4-7

Dr. Kanhu’s COSID index: An acronym for plan evaluation in SRS & SBRT


1 Department of Radiation Oncology, Mahatma Gandhi Cancer Hospital and research Institute, Visakhapatnam, Andhra Pradesh, India
2 Department of Radiation Oncology, Acharya Harihar Post Graduate Institute of Cancer, Cuttack, India
3 Department of Medical Physics, Mahatma Gandhi Cancer Hospital and research Institute, Visakhapatnam, Andhra Pradesh, India

Correspondence Address:
Dr. Kanhu Charan Patro
Department of Radiation Oncology, Mahatma Gandhi Cancer Hospital and Research Institute, Visakhapatnam, Andhra Pradesh
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jco.jco_34_21

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Background: A major parameter in the workflow of radiation treatment is the plan evaluation. In order to achieve high dose to target, minimum dose to the critical structures and accurate delivery of treatment, various qualitative and quantitative parameters need to be assessed during plan evaluation. Material and Methods: Here we propose an acronym COSID to describe the five major indices that need to be evaluated during a stereotactic treatment plan. Results: The stereotactic radiation plan evaluation include good target coverage, minimum dose to the organs at risk (OAR), homogeneity and conformity of dose to the target. As very high dose is being delivered in stereotactic radiotherapy in one or small number of fractions, certain other parameters such as the dose fall of beyond the target and the complexity of plan must to be addressed. The proposed COSID index is an acronym for these parameters such as Coverage Index, OAR Index, Spillage Index, Imaging Index and Delivery Index. Conclusion: The paper highlights the five important parameters that need to be assessed while evaluating a Stereotactic Radiosurgery (SRS) or Stereotactic Radiotherapy (SRT) plan.


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