Method for the evaluation of a average glandular dose in mammography

Okunade, Akintunde Akangbe

doi:10.1118/1.2179150

Title: Method for the evaluation of a average glandular dose in mammography

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Abstract

This paper concerns a method for accurate evaluation of average glandular dose (AGD) in mammography. At different energies, the interactions of photons with tissue are not uniform. Thus, optimal accuracy in the estimation of AGD is achievable when the evaluation is carried out using the normalized glandular dose values, g(x,E), that are determined for each (monoenergetic) x-ray photon energy, E, compressed breast thickness (CBT), x, breast glandular composition, and data on photon energy distribution of the exact x-ray beam used in breast imaging. A generalized model for the values of g(x,E) that is for any arbitrary CBT ranging from 2 to 9 cm (with values that are not whole numbers inclusive, say, 4.2 cm) was developed. Along with other dosimetry formulations, this was integrated into a computer software program, GDOSE.FOR, that was developed for the evaluation of AGD received from any x-ray tube/equipment (irrespective of target-filter combination) of up to 50 kVp. Results are presented which show that the implementation of GDOSE.FOR yields values of normalized glandular dose that are in good agreement with values obtained from methodologies reported earlier in the literature. With the availability of a portable device for real-time acquisition of spectra, the model and computer softwaremore »« less

Authors:

Okunade, Akintunde Akangbe ^[1]

Obafemi Awolowo University, Ile-Ife, Osun State (Nigeria)

Publication Date:: Sat Apr 15 00:00:00 EDT 2006

OSTI Identifier:: 20775116

Resource Type:: Journal Article

Journal Name:: Medical Physics

Additional Journal Information:: Journal Volume: 33; Journal Issue: 4; Other Information: DOI: 10.1118/1.2179150; (c) 2006 American Association of Physicists in Medicine; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-2405

Country of Publication:: United States

Language:: English

Subject:: 62 RADIOLOGY AND NUCLEAR MEDICINE; ACCURACY; BIOMEDICAL RADIOGRAPHY; COMPUTER CODES; DOSIMETRY; ENERGY SPECTRA; EVALUATION; FILTERS; MAMMARY GLANDS; PHOTONS; RADIATION DOSES; THICKNESS; X-RAY TUBES

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                    Okunade, Akintunde Akangbe. Method for the evaluation of a average glandular dose in mammography.  United States: N. p., 2006. 
        Web.  doi:10.1118/1.2179150.

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                    Okunade, Akintunde Akangbe. Method for the evaluation of a average glandular dose in mammography.  United States.  https://doi.org/10.1118/1.2179150

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                    Okunade, Akintunde Akangbe. 2006.  
        "Method for the evaluation of a average glandular dose in mammography".  United States.  https://doi.org/10.1118/1.2179150.

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@article{osti_20775116,

  title        = {Method for the evaluation of a average glandular dose in mammography},

  author       = {Okunade, Akintunde Akangbe},

  abstractNote = {This paper concerns a method for accurate evaluation of average glandular dose (AGD) in mammography. At different energies, the interactions of photons with tissue are not uniform. Thus, optimal accuracy in the estimation of AGD is achievable when the evaluation is carried out using the normalized glandular dose values, g(x,E), that are determined for each (monoenergetic) x-ray photon energy, E, compressed breast thickness (CBT), x, breast glandular composition, and data on photon energy distribution of the exact x-ray beam used in breast imaging. A generalized model for the values of g(x,E) that is for any arbitrary CBT ranging from 2 to 9 cm (with values that are not whole numbers inclusive, say, 4.2 cm) was developed. Along with other dosimetry formulations, this was integrated into a computer software program, GDOSE.FOR, that was developed for the evaluation of AGD received from any x-ray tube/equipment (irrespective of target-filter combination) of up to 50 kVp. Results are presented which show that the implementation of GDOSE.FOR yields values of normalized glandular dose that are in good agreement with values obtained from methodologies reported earlier in the literature. With the availability of a portable device for real-time acquisition of spectra, the model and computer software reported in this work provide for the routine evaluation of AGD received by a specific woman of known age and CBT.},

  doi          = {10.1118/1.2179150},

  url          = {https://www.osti.gov/biblio/20775116},
  journal      = {Medical Physics},

  issn         = {0094-2405},

  number       = 4,

  volume       = 33,

  place        = {United States},

  year         = {Sat Apr 15 00:00:00 EDT 2006},

  month        = {Sat Apr 15 00:00:00 EDT 2006}

}

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