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Information Journal Paper

Title

Quantification of skin dose increase and photon beam attenuation for a commercial couch top and breast board using dosimetric and Monte Carlo methods

Pages

  299-309

Abstract

 Background: To study a enua on and increased skin dose for the iBEAM Standard couchtop, and a enua on of the BreastSTEP board, for an Elekta Compact 6 MV accelerator. Materials and Methods: Couchtop a enua on were measured for the range of gantry angles 125°-180° and field sizes 5×5-20×8 cm2. H&N extension and the BreastSTEP a enua ons measured in an 8×8 cm2 field. The couchtop effect on percentage depth-dose (PDD) measured by an EFD diode for field sizes 5×5-20×20 cm2 and compared with that produced by a Co-60 beam passing through a ‘ tennis-racket’ couch insert. A Monte Carlo (MC) model of the couchtop produced to provide more superficial PDDs. (PDDs that are more superficial) Results: Maximum couchtop a enua on (7. 6%) measured for the 135° gantry and 5×5 cm2 field. Couch extension a enua on was 1. 5% lower. Adding BreastSTEP increased a enua on by 2. 4%. MC a enua on results agreed with measurements to within 0. 2%. The couchtop removed the dose buildup effect almost completely and increased the PDD at 0. 4 mm depth by 60. 6%-74. 6%. MC-calculated PDDs at the depth range of skin basal cell layer (0. 1-0. 4 mm) increased by 55. 3%-63. 2%. The couch insert in the Co-60 beam increased the dose at 0. 4 mm depth by 18. 1%. For the same dose prescrip on at 10 cm depth, the insert in the Co-60 beam produced a skin dose 49. 7% lower than the couchtop at 6 MV. Conclusion: These results provide useful prac cal data on a enua on and skin dose increase applicable to many centres. The acceleratorcouchtop combina on creates a greater skin dose increase than a tennis-racket insert on a Co-60 unit.

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    Cite

    APA: Copy

    Arianfard, f., MOSLEH SHIRAZI, M.A., KARBASI, S., & MOUSAVI, S.. (2018). Quantification of skin dose increase and photon beam attenuation for a commercial couch top and breast board using dosimetric and Monte Carlo methods. INTERNATIONAL JOURNAL OF RADIATION RESEARCH, 16(3), 299-309. SID. https://sid.ir/paper/286750/en

    Vancouver: Copy

    Arianfard f., MOSLEH SHIRAZI M.A., KARBASI S., MOUSAVI S.. Quantification of skin dose increase and photon beam attenuation for a commercial couch top and breast board using dosimetric and Monte Carlo methods. INTERNATIONAL JOURNAL OF RADIATION RESEARCH[Internet]. 2018;16(3):299-309. Available from: https://sid.ir/paper/286750/en

    IEEE: Copy

    f. Arianfard, M.A. MOSLEH SHIRAZI, S. KARBASI, and S. MOUSAVI, “Quantification of skin dose increase and photon beam attenuation for a commercial couch top and breast board using dosimetric and Monte Carlo methods,” INTERNATIONAL JOURNAL OF RADIATION RESEARCH, vol. 16, no. 3, pp. 299–309, 2018, [Online]. Available: https://sid.ir/paper/286750/en

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