Different Dosimeters/Detectors Used in Small-Field Dosimetry: Pros and Cons

Wrya Parwaie, Soheila Refahi, Mahdieh Afkhami Ardekani, Bagher Farhood


With the advent of complex and precise radiation therapy techniques, the use of relatively small
fields is needed. Using such field sizes can cause uncertainty in dosimetry; therefore, special
attention is required both in dose calculations and measurements. There are several challenges in
small-field dosimetry such as the steep gradient of the radiation field, volume averaging effect, lack
of charged particle equilibrium, partial occlusion of radiation source, beam alignment, and unable
to use a reference dosimeter. Due to these challenges, special dosimeters are needed for small-field
dosimetry, and this review article discusses this topic.

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