Feasibility of linear diode array based small field data acquisition for 6 MV &amp; 15 MV photon beams – An intercomparison with micro ion chamber

Gul, Attia; Kakakhel, Muhammad Basim; Amjad, Nauman; Razzaq, Aasia; Mirza, Sikander M.

doi:10.1016/j.radphyschem.2019.05.007

Cited by 5 publications

(1 citation statement)

References 29 publications

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“…[4][5][6] The last decade has witnessed a lot of effort for identification of suitable detectors and/ or applying appropriate corrections to employ these detectors for accurate dose measurement in small fields. [7][8][9][10][11] Yet, there is no one-size-fits-all solution available for small field dosimetry with each detector having its own pros and cons. 12,13 However, new detectors are being introduced to meet the above-mentioned challenges.…”

Section: Introductionmentioning

confidence: 99%

Feasibility study of using Stereotactic Field Diode for field output factors measurement and evaluating three new detectors for small field relative dosimetry of 6 and 10 MV photon beams

Gul

Fukuda

Mizuno

et al. 2020

J Applied Clin Med Phys

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This study assesses the feasibility of using stereotactic field diode (SFD) as an alternate to gaf chromic films for field output factor (FF) measurement and further evaluating three new detectors for small field dosimetry. Varian 21EX linear accelerator was used to generate 6 and 10 MV beams of nominal square fields ranging from 0.5 × 0.5 cm2 to 10 × 10 cm2. One passive (EBT3 films) and five active detectors including IBA RAZOR diode(RD), SFD, RAZOR nanochamber (RNC), pinpoint chamber (PTW31023), and semiflex chamber (PTW31010) were employed. FFs were measured using films and SFD while beam profiles and percentage depth dose (PDD) distribution were acquired with active detectors. Polarity (kpol) and recombination (ks) effects of ion chambers were determined and corrected for output ratio measurement. Correction factors (CF) of RD, RNC, and PTW31023 in axial and radial orientation were also measured. Stereotactic field diode measured FFs have shown good agreement with films (with difference of <1%). RD and RNC measured beam profiles were within 3% deviation from the SFD values. Variation in kpol with field size for RNC and PTW31023 was up to 4% and 0.4% (for fields ≥ 1 × 1 cm2), respectively, while variation in ks of PTW31023 was <0.2 %. The maximum values of CF have been calculated to be 5.2%, 2.0%, 13.6%, and 25.5% for RD, RNC, PTW31023‐axial, and PTW31023‐radial respectively. This study concludes that SFD with appropriate CFs as given in TRS 483 may be used for measuring FFs as an alternate to EBT3 films. Whereas RD and RNC may be used for beam profile and PDD measurement in small fields. Considering the limit of usability of 2%, RNC may be used without CF for FF measurement in the smallfields investigated in this study.

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Section: Introductionmentioning

confidence: 99%

Feasibility study of using Stereotactic Field Diode for field output factors measurement and evaluating three new detectors for small field relative dosimetry of 6 and 10 MV photon beams

Gul

Fukuda

Mizuno

et al. 2020

J Applied Clin Med Phys

Self Cite

View full text Add to dashboard Cite

show abstract

Evaluation of scanning resolution, detector choice and detector orientation to be used for accurate and time-efficient commissioning of a 6MV clinical linear accelerator

Azhar

Gul

Javid

et al. 2022

Radiat Environ Biophys

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Evaluation of MAGIC-f polymer gel dosimeter for dose profile measurement in small fields and stereotactic irradiation

Azadeh

Amiri

Mostaar

et al. 2022

Radiation Physics and Chemistry

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Feasibility of linear diode array based small field data acquisition for 6 MV & 15 MV photon beams – An intercomparison with micro ion chamber

Cited by 5 publications

References 29 publications

Feasibility study of using Stereotactic Field Diode for field output factors measurement and evaluating three new detectors for small field relative dosimetry of 6 and 10 MV photon beams

Feasibility study of using Stereotactic Field Diode for field output factors measurement and evaluating three new detectors for small field relative dosimetry of 6 and 10 MV photon beams

Evaluation of scanning resolution, detector choice and detector orientation to be used for accurate and time-efficient commissioning of a 6MV clinical linear accelerator

Evaluation of MAGIC-f polymer gel dosimeter for dose profile measurement in small fields and stereotactic irradiation

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Feasibility of linear diode array based small field data acquisition for 6 MV & 15 MV photon beams – An intercomparison with micro ion chamber

Cited by 5 publications

References 29 publications

Feasibility study of using Stereotactic Field Diode for field output factors measurement and evaluating three new detectors for small field relative dosimetry of 6 and 10 MV photon beams

Feasibility study of using Stereotactic Field Diode for field output factors measurement and evaluating three new detectors for small field relative dosimetry of 6 and 10 MV photon beams

Evaluation of scanning resolution, detector choice and detector orientation to be used for accurate and time-efficient commissioning of a 6MV clinical linear accelerator

Evaluation of MAGIC-f polymer gel dosimeter for dose profile measurement in small fields and stereotactic irradiation

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Feasibility of linear diode array based small field data acquisition for 6 MV & 15 MV photon beams – An intercomparison with micro ion chamber