Matches in DBpedia 2015-10 for { ?s ?p "Dose area product (DAP) is a quantity used in assessing the radiation risk from diagnostic x-ray examinations and interventional procedures. It is defined as the absorbed dose multiplied by the area irradiated, expressed in gray square centimetres (Gy cm²) (sometimes mGy cm² or cGy cm²). Manufacturers of DAP meters usually calibrate them in terms of absorbed dose to air. DAP reflects not only the dose within the radiation field but also the area of tissue irradiated. Therefore, it may be a better indicator of the overall risk of inducing cancer than the dose within the field. It also has the advantages of being easily measured, with the permanent installation of a DAP meter on the x-ray set.Due to the divergence of a beam emitted from a ‘point source’, the area irradiated (A) increases with the square of distance from the source (A ∝ d²), while radiation intensity (I) decreases according to the inverse square of distance (I ∝ 1/d²). Consequently, the product of intensity and area, and therefore DAP, is independent of distance from the source."@en }
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- Dose_area_product abstract "Dose area product (DAP) is a quantity used in assessing the radiation risk from diagnostic x-ray examinations and interventional procedures. It is defined as the absorbed dose multiplied by the area irradiated, expressed in gray square centimetres (Gy cm²) (sometimes mGy cm² or cGy cm²). Manufacturers of DAP meters usually calibrate them in terms of absorbed dose to air. DAP reflects not only the dose within the radiation field but also the area of tissue irradiated. Therefore, it may be a better indicator of the overall risk of inducing cancer than the dose within the field. It also has the advantages of being easily measured, with the permanent installation of a DAP meter on the x-ray set.Due to the divergence of a beam emitted from a ‘point source’, the area irradiated (A) increases with the square of distance from the source (A ∝ d²), while radiation intensity (I) decreases according to the inverse square of distance (I ∝ 1/d²). Consequently, the product of intensity and area, and therefore DAP, is independent of distance from the source.".