Nowadays, dual energy X-ray absorptiometry is used in bone mineral density
systems to assess the amount of osteoporosis. The purpose of this research is
to evaluate patient organ doses from dual X-ray absorptiometry by
thermoluminescence dosimeters chips and Monte Carlo method. To achieve this
goal, in the first step, the surface dose of the cervix, kidney, abdomen
region, and thyroid were measured by using TLD-GR 200 at various organ
locations. Then, to evaluate the absorbed dose by simulation, the BMD system,
patient's body, X-ray source and radiosensitive tissues were simulated by the
Monte Carlo method. The results showed, for the spine (left femur) bone
mineral density scan by using thermoluminescence dosimeters, the absorbed
doses of the cervix and kidney were 4.5 (5.64) and 162.17 (3.99)(mGy),
respectively. For spine (left femur) bone mineral density scan in simulation,
the absorbed doses of the cervix and kidney were 4.19 (5.88) and 175
(3.68)(mGy), respectively. The data obtained showed that the absorbed dose of
the kidney in the spine scan is noticeable. Furthermore, because of the small
relative difference between the simulation and experimental results, the
radiation absorbed dose may be assessed by simulation and software,
especially for internal organs, and at different depths of otherwise
inaccessible organs which is not possible in experiments.
Assessment of the absorbed dose to organs from bone mineral density scan by using TLDS and the Monte Carlo method
