ANALYTICAL APPROACH FOR DETERMINATION OF EFFECTIVE POINT OF MEASUREMENT FOR CYLINDRICAL IONIZATION CHAMBER

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TAHMASEBI BIRGANI M.J.; BEHROOZ M.A.; TALAIE GOMARY M.; KARBALAIE S.M.

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Journal Paper

Paper Information

Journal: Jundishapur Scientific Medical Journal Year:2011 | Volume:9 | Issue:6 (69) Page(s): 587-591

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Title

ANALYTICAL APPROACH FOR DETERMINATION OF EFFECTIVE POINT OF MEASUREMENT FOR CYLINDRICAL IONIZATION CHAMBER

Author(s)

TAHMASEBI BIRGANI M.J. | BEHROOZ M.A. | TALAIE GOMARY M. | KARBALAIE S.M. | Issue Writer Certificate

Keywords

EFFECTIVE POINT OF MEASUREMENT

CYLINDRICAL IONIZATION CHAMBER

PERCENT-DEPTH-DOSE CURVES

Abstract

Background and Objective: CYLINDRICAL IONIZATION CHAMBER is used for measurements of patient dose in radiation therapy. By determination the EFFECTIVE POINT OF MEASUREMENT we can determine the dose distribution and the parameters of treatment. Therefore in this research we introduce an analytical approach for determination this point in CC13 CYLINDRICAL IONIZATION CHAMBER that used for dosimetry of linear accelerator.Subjects and Methods: In this study a CC13 ionization chamber was used for dose measurement of 6 and 18 photon beams of Variant accelerator in different field sizes, 5*5 cm2 up to 35*35cm2. Measurements were performed in blue phantom, up to 5cm depth and data fit software was used for evaluation of experimental data.Results: with our formalism the Pdis quantity in 6MV for 5x5 thought 35x35cm2 were measured 3.088 to 2.88 mm and in 18 MV are measured 4.62 to 4.20 mm.Conclusion: The first critical point of each curve is caused by changing environment from air to water during measuring of ionization. In fact it can be considered critical point as EFFECTIVE POINT OF MEASUREMENT of ionization chamber. Investigation shows that any increasing in field size, decrease and increasing of energy increase the depth of this critical point.

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APA: Copy

TAHMASEBI BIRGANI, M.J., BEHROOZ, M.A., TALAIE GOMARY, M., & KARBALAIE, S.M.. (2011). ANALYTICAL APPROACH FOR DETERMINATION OF EFFECTIVE POINT OF MEASUREMENT FOR CYLINDRICAL IONIZATION CHAMBER. JUNDISHAPUR SCIENTIFIC MEDICAL JOURNAL, 9(6 (69)), 587-591. SID. https://sid.ir/paper/568849/en

Vancouver: Copy

TAHMASEBI BIRGANI M.J., BEHROOZ M.A., TALAIE GOMARY M., KARBALAIE S.M.. ANALYTICAL APPROACH FOR DETERMINATION OF EFFECTIVE POINT OF MEASUREMENT FOR CYLINDRICAL IONIZATION CHAMBER. JUNDISHAPUR SCIENTIFIC MEDICAL JOURNAL[Internet]. 2011;9(6 (69)):587-591. Available from: https://sid.ir/paper/568849/en

IEEE: Copy

M.J. TAHMASEBI BIRGANI, M.A. BEHROOZ, M. TALAIE GOMARY, and S.M. KARBALAIE, “ANALYTICAL APPROACH FOR DETERMINATION OF EFFECTIVE POINT OF MEASUREMENT FOR CYLINDRICAL IONIZATION CHAMBER,” JUNDISHAPUR SCIENTIFIC MEDICAL JOURNAL, vol. 9, no. 6 (69), pp. 587–591, 2011, [Online]. Available: https://sid.ir/paper/568849/en

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