Abstract
A CS-137 blood product irradiator (BPI) is used for extracorporeal irradiation of bone grafts. For dose verification purposes two bone phantoms were constructed of plaster of Paris and irradiated in the BPI. The first was a hollow cylinder measuring 15 cm /sX 3.3 cm to simulate cortical bone, filled with paraffin wax to simulate yellow bone marrow. The second was a concave ellipse 11.5 cm /sX 9.5 cm /sX 2.5 cm to simulate a section of ilium. The absorbed dose was measured with radiochromic film in the phantoms and in water for comparison with the manufacturer’s calibration certificate. The relative dose distribution in the bone phantoms was measured using Li-F thermoluminescent dosimeters and normalized to a reference point near the centre of each phantom. The doses measured in water matched the calibration certificate within 4%. The doses measured at the cylindrical and elliptical phantom reference points were 49.9 Gy and 52.3 Gy respectively, compared to the nominal dose of 50.0 Gy. The relative doses within the cylindrical phantom ranged from 88% to 100% along the central axis of the wax cylinder, from 89% to 100% along the plaster/wax interface, and from 90% to 103% along the outer surface of the plaster cylinder. The relative doses within the elliptical phantom ranged from 100% to 108% along the inside surface, from 99% to 107% along the outer surface, and from 98% to 103% through the centre of the plaster ellipse. These data agree well with the isodose plot provided by the manufacturer.
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Uyttendaele D, De Schryver A, Claessens H,et. al. Limb conservation in primary tumours by resection, extracorporeal irradiation and re-implantation. J Bone Joint Surg [Br] 1988;70-B:348–353.
Takahashi S, Sugimoto M, Kotoura Y,et. al. Incorporation of cortical bone autografts following intraoperative extracorporeal irradiation in rabbits. Int. J. Radiat. Oncol. Biol. Phys. 1991; 21:1221–1230.
Böhm P, Scherer MA,Incorporation of devitalised autografts in dogs. Int Orthop 1997;21:283–290.
Voggenreiter G, Ascher R, Blüme G,et. al. Extracorporeal irradiation and incorporation of bone grafts —autogenic cortical grafts studied in rats. Acta Orthop Scand 1996;67(6):583–588.
ICRU Report 44,Tissue substitutes in radiation dosimehy and measurement. International Commission on Radiation Units and Measurements, Bethesda, Md., U.S.A., 1989.
Kron T, Duggan L, Smith T,et. al.Dose response of various radiation detectors to synchrotron radiation. Phys Med Biol 1998;43:3235–3259.
Fearon TC and Luban NL.Practical dosimetric aspects of blood and bloodproduct irradiation. Transfusion 1986;26:457–459.
Folkard M, Roper MJ, Michael BD.Measurement and analysis of supralinearity in TLD-I 00 irradiated by 1.5 keV xrays. Phys Med Biol 1989;34:707–715.
Bogner L, Härtl P, Scherer J,et.al. Dosimetrie eines Blutbestrahlungsgerätes. Strahlenther Onkol 1998; 174:431–436.
Young JG, Boas JF.Comparison of TLD and electron spin resonance as dosimetry methods in the investigation of the dose distribution inside 137 Cs Gammacell-1000 irradiator. Australas Phys Eng Sci Med 1994; 17:136–140.
Jenkin RD.Radiation treatment of Ewing’s sarcoma and osteogenic sarcoma. Can J Surg 1977;20:530–536.
Donaldson SS, Torrey M, Link M,et al.A multidisciplinaly study investigating radiotherapy in Ewing’s sarcoma: end results of POG #8346. Int. J. Radiat. Oncol. Biol. Phys. 1998; 42: 125–135.
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Ralston, A., Estoesta, E., Stevens, G. et al. Extracorporeal irradiation — novel use of a blood product irradiator. Australas. Phys. & Eng. Sci. Med. 24, 59–62 (2001). https://doi.org/10.1007/BF03178347
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DOI: https://doi.org/10.1007/BF03178347