Journal of Medical Physics
TECHNICAL NOTE
Year
: 2013  |  Volume : 38  |  Issue : 2  |  Page : 98--105

Comparative study of four advanced 3d-conformal radiation therapy treatment planning techniques for head and neck cancer


Mohamed Yassine Herrassi1, Farida Bentayeb2, Maria Rosa Malisan3 
1 Departement of Physics, Laboratory of High Energy Physics, Modelling and Simulation, Faculty of Science, Mohammed V Agdal University, Rabat; Department of Medical Physics, Ryad Oncology Center, Casablanca, Morocco
2 Departement of Physics, Laboratory of High Energy Physics, Modelling and Simulation, Faculty of Science, Mohammed V Agdal University, Rabat, Morocco
3 Department of Medical Physics, University Hospital, Udine, Italy

Correspondence Address:
Farida Bentayeb
Departement of Physics, Laboratory of High Energy Physics, Modelling and Simulation, Faculty of Science, Mohammed V Agdal University, Rabat
Morocco

For the head-and-neck cancer bilateral irradiation, intensity-modulated radiation therapy (IMRT) is the most reported technique as it enables both target dose coverage and organ-at-risk (OAR) sparing. However, during the last 20 years, three-dimensional conformal radiotherapy (3DCRT) techniques have been introduced, which are tailored to improve the classic shrinking field technique, as regards both planning target volume (PTV) dose conformality and sparing of OARSQs, such as parotid glands and spinal cord. In this study, we tested experimentally in a sample of 13 patients, four of these advanced 3DCRT techniques, all using photon beams only and a unique isocentre, namely Bellinzona, Forward-Planned Multisegments (FPMS), ConPas, and field-in-field (FIF) techniques. Statistical analysis of the main dosimetric parameters of PTV and OARSQs DVHSQs as well as of homogeneity and conformity indexes was carried out in order to compare the performance of each technique. The results show that the PTV dose coverage is adequate for all the techniques, with the FPMS techniques providing the highest value for D95%; on the other hand, the best sparing of parotid glands is achieved using the FIF and ConPas techniques, with a mean dose of 26 Gy to parotid glands for a PTV prescription dose of 54 Gy. After taking into account both PTV coverage and parotid sparing, the best global performance was achieved by the FIF technique with results comparable to that of IMRT plans. This technique can be proposed as a valid alternative when IMRT equipment is not available or patient is not suitable for IMRT treatment.


How to cite this article:
Herrassi MY, Bentayeb F, Malisan MR. Comparative study of four advanced 3d-conformal radiation therapy treatment planning techniques for head and neck cancer.J Med Phys 2013;38:98-105


How to cite this URL:
Herrassi MY, Bentayeb F, Malisan MR. Comparative study of four advanced 3d-conformal radiation therapy treatment planning techniques for head and neck cancer. J Med Phys [serial online] 2013 [cited 2021 Sep 24 ];38:98-105
Available from: https://www.jmp.org.in/article.asp?issn=0971-6203;year=2013;volume=38;issue=2;spage=98;epage=105;aulast=Herrassi;type=0