Keywords:
Not applicable, Experimental, Occupational / Environmental hazards, Dosimetric comparison, Radiation safety, Dosimetry, CT, Radioprotection / Radiation dose, Radiographers
Authors:
Y. Takei1, S. Suzuki2, H. Itoh3, M. Hashimoto4, H. Ueno5, A. Hirosawa5, S. Ishizaki3, K. Matsubara6, I. Kobayashi7; 1Kurashiki/JP, 2Nagoya, Aichi/JP, 3Toyama/JP, 4Kobe/JP, 5Takaoka/JP, 6Kanazawa/JP, 7Tsukuba, Ibaraki/JP
DOI:
10.26044/ecr2020/C-00463
Methods and materials
Scatter X-rays Measurements: The Scatter Radiation measurements were performed with single-energy (SE) and dual-energy (DE) head CT scans using the third generation dual-source CT (SOMATOM Force, SIEMENS Healthineer, Erlangen, Germany).
The anthropomorphic phantom (Model RAN-110, Phantom Laboratory, Salem, USA) placed on the CT table. A solid-state detector (SSD) survey meter (X2 Survey Sensor, Unfors RaySafe, Billdal, Sweden) and an ion chamber (IC: 10X6-180, Radcal, Monrovia, USA) placed at caregiver standing position nearby both side of CT gantry (see fig.2).
The SE and DE head CT scans performed at three times to measure the scatter X-rays from the phantom. The exposure parameter of the SE and the DE scan showed the table 2.
Penetration Measured with Lead and Non-lead aprons using SE and DECT: The penetrated scatter X-rays measurements through radiation protective aprons were performed with the SE and DE scans.
The Optically Stimulated Luminescense (OSL) dosimeter (nanoDot, Nagase Landauer, Tsukuba, Japan) were pasted inside and outside of the radiation protective aprons (see fig.3).
A lead or non-lead protective aprons were placed at caregivers standing position nearby both side of CT gantry (see fig.4). The SE and DE head CT scans performed at three times to measure the penetrated scatter X-rays through the radiation protective aprons.