การศึกษาปริมาณรังสีและปริมาณรังสีกระเจิงจากการตรวจ ด้วยเครื่องเอกซเรย์คอมพิวเตอร์ในหุ่นจำลอง

บทคัดย่อ

This study aimed to use Optically Stimulated Luminescent (OSL) dosimeter to
measure the radiation dose and radiation dose distribution from CT scan. OSL dosimeters were
placed on eyes, thyroid glands, breasts, abdomen, lower abdomen, and gonad to measure
the equivalent dose. OSL dosimeters were attached to the column placed around the CT
couch to measure the radiation dose distribution. The results showed that lower abdomen
received the highest radiation doses (58 mSv) when examined with the whole abdomen
protocol. The organs outside the primary beam such as breasts, thyroid glands, and eyes
received the radiation dose of 39.5 mSv, 2.22 mSv, and 0.59 mSv, respectively. The radiation
dose distribution from CT scan showed that the radiation dose around gantry area (0.87 mSv)
was higher than the couch area (0.02 mSv). Moreover, the radiation dose distribution at thyroid
gland level was higher than that measured at gonad level. Radiation protection as low as
reasonably achievable principle can be applied to patients, staffs, and patient’s relatives to
prevent any radiation incident.