X-ray Dosimetry
X-ray dosimetry is the calculation of the absorbed dose in matter and living tissue that results from the exposure to ionizing radiation. The business of monitoring radiation dose has lead to this scientific subspecialty in the fields of health physics and medical physics. The main idea is focused on the calculation of internal and external doses from all ionizing radiation sources.
The dose is reported in the unit gray (Gy) for the matter or sieverts (Sv) for living tissue. The conversions are 1 Gy or 1 Sv is equal to 1 joule of energy per kilogram of mass. Non- SI units are still used in the field, especially in The United Statesl, where dose is often reported in rads and dose equivalent in rems. By definition, 1 Gy = 100 rad and 1 Sv = 100 rem.
Some exams will not allow lead shielding due to the area of intrest being in a place that the lead would interfer with. Seeing the body part is the reason for the exam and the lead can not block the path of the X-ray beam.
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