EVALUATION OF TUMOR CONTROL AND NORMAL TISSUE COMPLICATION PROBABILITY IN HEAD AND NECK CANCERS WITH DIFFERENT SOURCES OF RADIATION: A COMPARATIVE STUDY

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SRIVASTAVA ANOOP KUMAR; RASTOGI MADHUP; MISHRA S.P.

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Journal: IRANIAN JOURNAL OF MEDICAL PHYSICS Year:2017 | Volume:14 | Issue:3 Page(s): 167-172

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Title

EVALUATION OF TUMOR CONTROL AND NORMAL TISSUE COMPLICATION PROBABILITY IN HEAD AND NECK CANCERS WITH DIFFERENT SOURCES OF RADIATION: A COMPARATIVE STUDY

Author(s)

SRIVASTAVA ANOOP KUMAR | RASTOGI MADHUP | MISHRA S.P. | Issue Writer Certificate

Keywords

TUMOR CONTROL PROBABILITY

NORMAL TISSUE COMPLICATION PROBABILITY

DOSE VOLUME HISTOGRAM

Abstract

Introduction: The ultimate goal of radiation treatment planning is to yield a high TUMOR CONTROL PROBABILITY (TCP) with a low NORMAL TISSUE COMPLICATION PROBABILITY (NTCP). Historically DOSE VOLUME HISTOGRAM (DVH) with only volumetric dose distribution was utilized as a popular tool for plan evaluation hence present study aimed to compare the radiobiological effectiveness of the cobalt-60 (Co-60) gamma photon and 6MV X-rays of linear accelerators (Linac) in the radiotherapy of head and neck tumors.Materials and Methods: TCP and NTCP were calculated using DVH through the BIOPLAN software developed by Sanchez-Nieto and Nahum. The treatment planning was performed for all the patients using both treatment modalities (i.e., Co-60 and 6 MV Linac). The TCP was also manually calculated using a mathematical formula proposed by Brenner’s et al.Results: The average TCP calculated by the BIOPLAN for Co-60 and 6 MV X-rays were 44.6% and 60.8%, respectively. Furthermore, the average NTCPs obtained for the organ at risk, namely optic nerve, for Co-60 and 6 MV X-ray were 0.24 % and 0.03 %, respectively. Regarding the spinal cord, the average NTCPs for Co-60 gamma photon and 6 MV X-ray of Linac were 0.05 % and 0.002%, respectively.Conclusion: As the findings of the present study indicated, Co-60 unit could provide comparable TCP along with minimal NTCP, compared to the high-cost technologies of Linac. The design of treatment plans based on the radiobiological parameters facilitated the judicious choice of physical parameters for the achievement of high TCP and low NTCP.

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APA: Copy

SRIVASTAVA, ANOOP KUMAR, RASTOGI, MADHUP, & MISHRA, S.P.. (2017). EVALUATION OF TUMOR CONTROL AND NORMAL TISSUE COMPLICATION PROBABILITY IN HEAD AND NECK CANCERS WITH DIFFERENT SOURCES OF RADIATION: A COMPARATIVE STUDY. IRANIAN JOURNAL OF MEDICAL PHYSICS, 14(3), 167-172. SID. https://sid.ir/paper/693949/en

Vancouver: Copy

SRIVASTAVA ANOOP KUMAR, RASTOGI MADHUP, MISHRA S.P.. EVALUATION OF TUMOR CONTROL AND NORMAL TISSUE COMPLICATION PROBABILITY IN HEAD AND NECK CANCERS WITH DIFFERENT SOURCES OF RADIATION: A COMPARATIVE STUDY. IRANIAN JOURNAL OF MEDICAL PHYSICS[Internet]. 2017;14(3):167-172. Available from: https://sid.ir/paper/693949/en

IEEE: Copy

ANOOP KUMAR SRIVASTAVA, MADHUP RASTOGI, and S.P. MISHRA, “EVALUATION OF TUMOR CONTROL AND NORMAL TISSUE COMPLICATION PROBABILITY IN HEAD AND NECK CANCERS WITH DIFFERENT SOURCES OF RADIATION: A COMPARATIVE STUDY,” IRANIAN JOURNAL OF MEDICAL PHYSICS, vol. 14, no. 3, pp. 167–172, 2017, [Online]. Available: https://sid.ir/paper/693949/en

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