Journal of Current Oncology

ORIGINAL ARTICLE
Year
: 2020  |  Volume : 3  |  Issue : 2  |  Page : 55--61

Can a low-energy photon beam be suitable for the treatment of cervical malignancies? A dosimetric analysis


Manindra Bhushan1, Deepak Tripathi2, Lalit Kumar1, Rahul Lal Chowdhary4, Anjali Kakria4, Pawan Kumar1, Swarupa Mitra4, Munish Gairola4 
1 Medical Physics Division, Department of Radiation Oncology, Rajiv Gandhi Cancer Institute & Research Centre, Delhi, India
2 Amity Institute of Applied Sciences, Amity University, Noida, Uttar Pradesh, India

Correspondence Address:
Mr. Manindra Bhushan
Medical Physics Division, Radiation Oncology Department, Rajiv Gandhi Cancer Institute & Research Centre, Sector-5, Rohini, Delhi 110085.
India

Background: Radiotherapy to a patient with cervical cancer can be delivered by four-field “box technique” with a benefit of much less dose to intervening tissues along with a better and homogenous dose distribution at the target location. An important ingredient for a good radiotherapy planning is the choice of beam energy. The present study aims to investigate the feasibility of a 4 MV photon beam for the treatment of cervical cancers. Materials and Methods: A population of 20 patients, with carcinoma cervix, was included in the study. All the patients were planned for a prescribed dose of 45 Gy in 25 fractions. Results: Plans were evaluated for planning target volume and found better in terms of coverage and hot spots using 6 MV. The homogeneity index (HI) was 1.1 for both the energies. Similarly, conformity index (CI) was 2.0 depending on the method used for 4 MV and 6 MV photons. Although the HI and CI were comparable for both the plans, yet it seems significantly better for 6 MV. This indicates that spillage in 6 MV plans is lesser as compare to 4 MV. The present study reveals that there is a significant reduction in total monitor units in the plans with 6 MV photon beams, leading to fewer chances of secondary malignancies. Conclusion: A 6 MV photon beam has some proven mileage over 4 MV in terms of target coverage, dose homogeneity, and conformity and remains the best suitable photon energy for the treatment of cervical malignancies.


How to cite this article:
Bhushan M, Tripathi D, Kumar L, Chowdhary RL, Kakria A, Kumar P, Mitra S, Gairola M. Can a low-energy photon beam be suitable for the treatment of cervical malignancies? A dosimetric analysis.J Curr Oncol 2020;3:55-61


How to cite this URL:
Bhushan M, Tripathi D, Kumar L, Chowdhary RL, Kakria A, Kumar P, Mitra S, Gairola M. Can a low-energy photon beam be suitable for the treatment of cervical malignancies? A dosimetric analysis. J Curr Oncol [serial online] 2020 [cited 2022 Sep 25 ];3:55-61
Available from: http://www.https://journalofcurrentoncology.org//article.asp?issn=2589-8892;year=2020;volume=3;issue=2;spage=55;epage=61;aulast=Bhushan;type=0