Dap Dose Area Product. Dose Area Product Dose area product (DAP) is a quantity used in assessing the radiation risk from diagnostic xray 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).
OverviewHow DAP is measuredKerma Area ProductAn ionization chamber is placed beyond the Xray collimators and must intercept the entire Xray field for an accurate reading Different parameters of the Xray set such as peak voltage (kVp) tube current (mA) exposure time or the area of the field can also be changed For example a 5 cm × 5 cm Xray field with an entrance dose of 1 mGy will yield a 25 mGycm DAP value When the field is increased to 10 cm × 10 cm with the same entrance dose the DAP increases to 100 mGy Text under.
DoseArea ProducttoEffective Dose Conversion
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Dose area product Wikipedia
Input value dose area product (DAP) Conversion factor (mSv/Gycm2) Gycm2 mGycm2 cGycm2 dGycm2 Gym2 Chest PA 016 Chest Lat 013 Cervical spine AP 019 Cervical spine Lat 012 Head AP 0058 Head PA 0034 Head Lat 0037 Shoulder AP 0064 Shoulder (axial) 0046 Thoracic spine AP 024 Thoracic spine LAT 0091 Lumbar spine AP.
Dose area product Radiology Reference Article
This article provides an overview of the total amount of radiation used in any radiographic examination expressed as the kermaarea product (KAP) which is also referred to as the “dosearea product (DAP)” [ 3 ] Incident Radiation Air Kerma.
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Dose area product (DAP) is a product of the surface area of the patient that is exposed to radiation at the skin entrance (in square centimeters or square meters) multiplied by the radiation dose at this surface (in grays) ( 2 21 ).