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Created page with "The air kerma on the central x-ray beam axis at the point where the x-ray beam enters the patient. The contribution of backscatter radiation is included through backscatter fa..."
The air kerma on the central x-ray beam axis at the point where the x-ray beam enters the patient. The contribution of backscatter radiation is included through backscatter factor (B), thus:
<div style='text-align: center;'>
<math>K_e= B⋅K_i</math>
</div>
The unit for entrance surface air kerma is the Gy. Entrance surface air kerma Ke can be calculated from incident air kerma <math>K_i</math> using suitable backscatter factor B, or determined directly using small dosimeters (thermoluminescent or semiconductor) positioned at the representative point on the skin of the patients. (Adapted from [[ICRP Publication 117]], 2010)
''[[ICRP Glossary]] entry - May 2019''
<div style='text-align: center;'>
<math>K_e= B⋅K_i</math>
</div>
The unit for entrance surface air kerma is the Gy. Entrance surface air kerma Ke can be calculated from incident air kerma <math>K_i</math> using suitable backscatter factor B, or determined directly using small dosimeters (thermoluminescent or semiconductor) positioned at the representative point on the skin of the patients. (Adapted from [[ICRP Publication 117]], 2010)
''[[ICRP Glossary]] entry - May 2019''