South Asian Journal of Cancer

LETTER TO THE EDITOR
Year
: 2017  |  Volume : 6  |  Issue : 1  |  Page : 37--38

Treatment planning challenges for prosthesis prostate cancer patients in radiation therapy


N Adhikari, Dinesh Babu Pandey 
 Department of Physics, Tri Chandra College, Kathmandu, Nepal

Correspondence Address:
Dinesh Babu Pandey
Department of Physics, Tri Chandra College, Kathmandu
Nepal




How to cite this article:
Adhikari N, Pandey DB. Treatment planning challenges for prosthesis prostate cancer patients in radiation therapy.South Asian J Cancer 2017;6:37-38


How to cite this URL:
Adhikari N, Pandey DB. Treatment planning challenges for prosthesis prostate cancer patients in radiation therapy. South Asian J Cancer [serial online] 2017 [cited 2020 Jul 12 ];6:37-38
Available from: http://journal.sajc.org/text.asp?2017/6/1/37/202571


Full Text

Dear Editor,

In Volume 3, Issue 1 of the South Asian Journal of Cancer, an article entitled “a dosimetric study of volumetric modulated arc therapy (VMAT) planning techniques for treatment of low-risk prostate cancer in patients with bilateral hip prostheses” was published.[1] The results in the study [1] demonstrated the number of arcs in the case of VMAT can affect the quality of the treatment plan. Hence, the four-arc technique was determined to provide good radiation dose distributions in the prostate cancer plans with bi-lateral hip prostheses. However, the paper [1] is limited to one treatment modality in the form of VMAT.

Currently, there is an increasing interest in using proton therapy for the prostate cancer treatment. Proton therapy is considered as one of the most advanced radiotherapy techniques. Recent studies have shown the feasibility of using proton therapy for the prostate cancer patients with metallic hip prosthesis. In the article [2] published by Journal of Applied Clinical Medical Physics (JACMP), authors have shown the lateral proton fields along with the oblique proton fields can be used to treat the prostate cancer patients who have a metallic prosthesis. Additionally, authors have shown that proton therapy is significantly better than VMAT as proton plans had better target coverage and reduced dose to the rectum and bladder. One of the differences between the papers published in South Asian Journal of Cancer (SAJC)[1] and JACMP [2] is the number of metallic hip prosthesis. The paper in SAJC involved two metallic hips, whereas the paper in the JACMP includes one metallic hip. For a single prosthesis, proton therapy was found to be better than VMAT,[2] and it would be interesting to compare the dosimetric quality of these two latest technologies (proton therapy and VMAT) for bi-lateral hip prostate cases. The RapidArc VMAT prostate plans can also be planned using flattening filter-free beams [3] and more accurate dose calculation algorithm such as Acuros XB.[4]

References

1Rana SB, Pokharel S. A dosimetric study of volumetric modulated arc therapy planning techniques for treatment of low-risk prostate cancer in patients with bilateral hip prostheses. South Asian J Cancer 2014;3:18-21.
2Rana S, Cheng C, Zheng Y, Hsi W, Zeidan O, Schreuder N, et al. Dosimetric study of uniform scanning proton therapy planning for prostate cancer patients with a metal hip prosthesis, and comparison with volumetric-modulated arc therapy. J Appl Clin Med Phys 2014;15:4611.
3Rout BK, Muralidhar KR, Ali M, Shekar MC, Kumar A. Dosimetric study of RapidArc plans with flattened beam (FB) and flattening filter-free (FFF) beam for localized prostate cancer based on physical indices. Int J Cancer Ther Oncol 2014;2:02046.
4Ojala J. The accuracy of the Acuros XB algorithm in external beam radiotherapy – A comprehensive review. Int J Cancer Ther Oncol 2014;2:020417.