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Information Journal Paper

Title

EVALUATION OF DEPTH DOSE CHARACTERISTICS OF SUPERFICIAL X-RAYS MACHINE USING DIFFERENT KVP AND APPLICATORS DIAMETER

Pages

  159-166

Abstract

 Background: RADIOTHERAPY TREATMENT Planning requires different dosimetric quantities as input in order to calculate a desired dose distribution. This study has been focused to evaluate the DEPTH DOSE characteristics of superficial X-rays being used for RADIOTHERAPY TREATMENT.Materials and Methods: Computerized 3-D water phantom of multi-data system was used. The measurements were made through PTW (Physikalirsch-Technische Werkstalten) farmer type NT-30006 waterproof ionization chamber of 0.6cc, and PTW electrometer for digital dose rate reading in Gy/min using five different diameter applicators and filters at five different values of accelerating potentials (kVps).Results: The dose rate at various KVP X-ray beams was observed to decrease significantly with increasing depth in water phantom for all applicator diameters from 98% (at 0.1cm depth) down to 43% (at 2cm i.e. reference condition). The dose rate increases by increasing the value of KVP with a maximum at 150 KVP (1.6 and 0.93 Gy/ min for respective applicator diameters 2.5cm and 10cm). Applicator with 2.5cm diameter demonstrates better dose rate at 85kVp at different depths. PDD decreases lower than 50% for all combination of applicators and KVPs at/or above 2cm depth so these measurements should not be considered for treatment planning.Conclusion: Higher energy X-rays are suggested to be used for applicators of higher diameters and smaller energy X-rays for applicators having smaller diameters.

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    APA: Copy

    ISMAIL, M., AFZAL, M., NADEEM, M., RANA, A.M., AMJAD, S., & BUZDAR, S.A.. (2011). EVALUATION OF DEPTH DOSE CHARACTERISTICS OF SUPERFICIAL X-RAYS MACHINE USING DIFFERENT KVP AND APPLICATORS DIAMETER. INTERNATIONAL JOURNAL OF RADIATION RESEARCH, 9(3), 159-166. SID. https://sid.ir/paper/286562/en

    Vancouver: Copy

    ISMAIL M., AFZAL M., NADEEM M., RANA A.M., AMJAD S., BUZDAR S.A.. EVALUATION OF DEPTH DOSE CHARACTERISTICS OF SUPERFICIAL X-RAYS MACHINE USING DIFFERENT KVP AND APPLICATORS DIAMETER. INTERNATIONAL JOURNAL OF RADIATION RESEARCH[Internet]. 2011;9(3):159-166. Available from: https://sid.ir/paper/286562/en

    IEEE: Copy

    M. ISMAIL, M. AFZAL, M. NADEEM, A.M. RANA, S. AMJAD, and S.A. BUZDAR, “EVALUATION OF DEPTH DOSE CHARACTERISTICS OF SUPERFICIAL X-RAYS MACHINE USING DIFFERENT KVP AND APPLICATORS DIAMETER,” INTERNATIONAL JOURNAL OF RADIATION RESEARCH, vol. 9, no. 3, pp. 159–166, 2011, [Online]. Available: https://sid.ir/paper/286562/en

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