Design and Construction of Cervix Phantom for Brachytherapy Dose Assessment Procedure for Clinical Application

Authors(5) :-Justice Avevor, Issahaku Shirazu, Samuel Nii Adu Tagoe, J. H. Amuasi, J. J. Fletcher

An important point to consider in a brachytherapy dosimetry study is the design of an appropriate phantom size in calculations or experimental measurements. Perspex sheets of various size and thickness are used to design the cervix phantom. The aim of the study is to design and construct cervix phantom to mimic the pelvic segment of a standard adult human patients undergoing Brachytherapy. This is to allow assessment of dose to cervix and the surrounding tissues during cervix Brachytherapy. The methodology include; first phantom design where physical dimensions of the phantom were determined from a sampling of 30 patientsí cases to simulate an average patient size. Secondly, construction of phantom with fabricated cylindrical shape, composed of 6 mm Perspex sheets, and the assembly enclosed with the 4 mm Perspex sheet. The result of the constructed phantom had lateral separation of 34 cm, an anterior and posterior separation of 27 cm; with length of 33 cm. The Perspex pieces were glued to each other with Trichloromethane (chloroform) at room temperature. Chloroform dissolves the Perspex (PMMA), and when applied to the surfaces of the Perspex sheets, the surfaces stick together after the chloroform dries up. In forming the surface of the phantom, the 4 mm Perspex sheet was oven heated to a temperature of 140?C to make the sheet malleable. One end of the phantom was made thicker than the other end by gluing another 6 mm Perspex sheet such that the thickness of that particular end of the phantom was 12 mm. A hole of diameter 6.5 cm, which was a little bit posterior to the phantom, was created central to the 12 mm end of the phantom. The opening created was covered by 11 x 11 cm2 and 12 mm Perspex slab which was formed by gluing two 6 mm sheets together. A hole of diameter 5 cm was also made central to the cover created, such that the centre of this hole matches that of the hole on the end of the phantom. A 2.4 cm thick ring with internal diameter of 5 cm and external diameter of 6 cm was fabricated from 2.4 cm Perspex slab, which was formed from gluing four pieces of 6 mm Perspex sheets together. The fabricated ring was mounted on the 11 x 11 cm2 cover created such that the internal walls of the ring and that of the hole in the cover matches. The ring was then glued to the cover using the chloroform. The built phantom simulate actual patient anatomy and produce an excellent result to be use for clinical application.

Authors and Affiliations

Justice Avevor
University of Cape Coast, School of Agriculture and Physical Sciences Faculty of Physical Sciences, Department of Physics, Cape coast, Ghana
Issahaku Shirazu
National Centre of Radiotherapy and Nuclear Medicine, Department of Medical Physics, Korle-Bu Teaching Hospital, Accra Ghana
Samuel Nii Adu Tagoe
Graduate School of Nuclear and Allied Sciences, University of Ghana, Legon, Ghana
J. H. Amuasi
Ghana Atomic Energy Commission, Radiological and Medical Sciences Research Institute, Medical Radiation Physics Centre, Accra, Ghana.
J. J. Fletcher
Ghana Atomic Energy Commission, Radiological and Medical Sciences Research Institute, Medical Radiation Physics Centre, Accra, Ghana.

Brachytherapy, Cervix Phantom, Rectum, Bladder, Perspex Sheet

  1. Sessions JB, Roshau JN, Tressler MA, et al. Comparisons of point and average organ dose within an anthropomor- Comparisons of point and average organ dose within an anthropomorphic physical phantom and a computational model of the newborn patient. Med Phys. 2002;29(6):1080-89.
  2. Jones AK, Hintenlang DE, Bolch WE. Tissue-equivalent materials for construction of tomographic dosimetry phantoms in pediatric radiology. Med Phys. 2003;30(8):2072-81.
  3. Kan MWK, Leung LHT, Wong W, Lam N. Radiation dose from cone beam computed tomography for imageguided radiation therapy. Int J Radiation Oncology Biol Phys. 2008;70(1):272-79.
  4. Hurwitz LM, Yoshizumi TT, Goodman PC, et al. Effective dose determination using an anthropomorphic phantom and metal oxide semiconductor field effect transistor technology for clinical adult body multidetector array computed tomography protocols. J Comput Assist Tomogr. 2007;31(4):544-49.
  5. Staton RJ, Jones AK, Lee C, et al. A tomographic physical phantom of the newborn child with real-time dosimetry. II. Scaling factors for calculation of mean organ dose in pediatric radiology. Med Phys. 2006;33(9):3283-89.
  6. White DR, Martin RJ, Darlison R. Epoxy resin based tissue substitutes. Br J Radiol. 1977;50(599):814-21.
  7. White DR. The formulation of tissue substitute materials using basic interaction data. Phys Med Biol. 1977;22(5):889-99.
  8. Lee C, Lee C, Park SH, Lee JK. Development of the two Korean adult tomographic computational phantoms for organ dosimetry. Med Phys. 2006;33(2):380-90.

Publication Details

Published in : Volume 3 | Issue 6 | September-October 2017
Date of Publication : 2017-10-31
License:  This work is licensed under a Creative Commons Attribution 4.0 International License.
Page(s) : 106-109
Manuscript Number : IJSRSET173488
Publisher : Technoscience Academy

Print ISSN : 2395-1990, Online ISSN : 2394-4099

Cite This Article :

Justice Avevor, Issahaku Shirazu, Samuel Nii Adu Tagoe, J. H. Amuasi, J. J. Fletcher, " Design and Construction of Cervix Phantom for Brachytherapy Dose Assessment Procedure for Clinical Application, International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 3, Issue 6, pp.106-109, September-October.2017
URL : http://ijsrset.com/IJSRSET173488

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