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An overview on small-field dosimetry in photon beam radiotherapy: Developments and challenges

1 Radiation and Wave Research Center, AJA University of Medical Sciences, Tehran, Iran
2 Department of Medical Physics, Tabriz Medical School, Tabriz, Iran
3 Department of Paramedical, Medical School, Tabriz University of Medical Sciences, Tabriz, Iran
4 Department of Radiation Oncology, Imam Hospital, Tabriz, Iran
5 Department of Radiology, AJA University, Tehran, Iran
6 Department of Pediatric Nephrology, AJA University of Medical Sciences, Tehran, Iran
7 Department of Medical Physics, RAZAVI Hospital, Mashhad, Iran

Correspondence Address:
Habib Alah Dadgar,
Department of Medical Physics, RAZAVI Hospital, Mashhad
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Source of Support: None, Conflict of Interest: None

Small fields are more repeatedly used for radiation therapy as small segments in intensity-modulated radiotherapy or as in the form of independent fields in stereotactic radiosurgery and other novel equipment such as cyberknife and tomotherapy. Nevertheless, the application of small fields for radiotherapy of lung makes the dose calculation and planning inaccurate due to the existence of electronic disequilibrium and intrinsic deficiencies within most of the analytical dose calculation algorithms. The current review attempts to gather the information in this regard and focuses on the current progresses and retaining issues associated with this type of photon beams.

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