JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Analytical Consideration of Surface Dose and Kerma for Megavoltage Photon Beams in Clinical Radiation Therapy
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Analytical Consideration of Surface Dose and Kerma for Megavoltage Photon Beams in Clinical Radiation Therapy
Birgani, Mohammad Javad Tahmasebi; Behrooz, Mohammad Ali; Razmjoo, Sasan; Zabihzadeh, Mansour; Fatahiasl, Jafar; Maskni, Reza; Abdalvand, Neda; Asgarian, Zeynab; Shamsi, Azin;
  PDF(new window)
 Abstract
Background: In radiation therapy, estimation of surface doses is clinically important. This study aimed to obtain an analytical relationship to determine the skin surface dose, kerma and the depth of maximum dose, with energies of 6 and 18 megavoltage (MV). Materials and Methods: To obtain the dose on the surface of skin, using the relationship between dose and kerma and solving differential equations governing the two quantities, a general relationship of dose changes relative to the depth was obtained. By dosimetry all the standard square fields of to , an equation similar to response to differential equations of the dose and kerma were fitted on the measurements for any field size and energy. Applying two conditions: a) equality of the area under dose distribution and kerma changes in versus depth in 6 and 18 MV, b) equality of the kerma and dose at $x
 Keywords
Dosimetry;skin surface dose;kerma;percentage depth dose;buildup region;
 Language
English
 Cited by
 References
1.
Apipunyasopon L, Phaisangittisakul N, Srisatit S (2013). Equivalent square formula for determining the surface dose of rectangular field from 6 MV therapeutic photon beam. J Appl Clin Med Physics, 14.

2.
Attix FH 2008. Introduction to radiological physics and radiation dosimetry, John Wiley & Sons.

3.
Bilge H, Cakir A, Okutan M, et al (2009). Surface dose measurements with GafChromic EBT film for 6 and 18MV photon beams. Physica Med, 25, 101-4. crossref(new window)

4.
Butson M, Mathur J, Metcalfe P (1997). Skin dose from radiotherapy X-ray beams: The influence of energy. Australasian Radiol, 41, 148-50. crossref(new window)

5.
Butson MJ, Cheung T, Peter K, et al (2004). Surface dose extrapolation measurements with radiographic film. Physics Med Biol, 49, 197. crossref(new window)

6.
Charles M, Khan Z (1978). Implementation of the ICRP recommendation on skin dose measurement using thermoluminescent dosemeters. Physics Med Biol, 23, 972. crossref(new window)

7.
Cora S, Francescon P (1995). Accurate build-up and surface dose measurements of megavolt photon beams from variety of accelerators. Phys Med, 11, 17-22.

8.
Devic S, Seuntjens J, Abdel-Rahman W, et al (2006). Accurate skin dose measurements using radiochromic film in clinical applications. Medical Physics, 33, 1116-24. crossref(new window)

9.
Ishmael Parsai E, Shvydka D, Pearson D, et al (2008). Surface and build-up region dose analysis for clinical radiotherapy photon beams. Applied Radiat Isotopes, 66, 1438-42. crossref(new window)

10.
Jornet N, Ribas M, Eudaldo T (2000). In vivo dosimetry: intercomparison between p-type based and n-type based diodes for the 16-25 MV energy range. Med Physics, 27, 1287-93. crossref(new window)

11.
Klein EE, Esthappan J, Li Z (2003). Surface and buildup dose characteristics for 6, 10, and 18 MV photons from an Elekta Precise linear accelerator. J Applied Clin Med Physics, 4, 1-7. crossref(new window)

12.
Lin J-P, Chu T-C, Lin S-Y, et al (2001). Skin dose measurement by using ultra-thin TLDs. Applied Radiat Isotopes, 55, 383-91. crossref(new window)

13.
Loevinger R (1981). A formalism for calculation of absorbed dose to a medium from photon and electron beams. Medical physics,8, 1-12. crossref(new window)

14.
Nilsson B, Montelius A (1986). Fluence perturbation in photon beams under nonequilibrium conditions. Med Physics, 13, 191-5. crossref(new window)

15.
Ravikumar M, Ravichandran R (2000). Dose measurements in the build-up region for the photon beams from Clinac-1800 dual energy medical linear accelerator. Strahlentherapie und Onkologie, 176, 223-8. crossref(new window)

16.
Scalchi P, Francescon P, Rajaguru P (2005). Characterization of a new MOSFET detector configuration for in vivo skin dosimetry. Medical physics, 32, 1571-8. crossref(new window)

17.
Tannous N, Gagnon W, Almond P (1981). Buildup region and skin-dose measurements for the Therac 6 Linear Accelerator for radiation therapy. Medical Physics, 8, 378-81. crossref(new window)

18.
Xiang HF, Song JS, Chin DW, et al (2007). Build-up and surface dose measurements on phantoms using micro-MOSFET in 6 and 10MV x-ray beams and comparisons with Monte Carlo calculations. Medical Physics,34, 1266-73. crossref(new window)