Multicenter Investigation of the Effective Dose for Whole-body CT Scanning
| Autor: | Toshimitsu Sato, Yukihiro Saito, Nobutoshi Saito, Makoto Ooba |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Dosimeter
Phantoms Imaging business.industry Hybrid type Whole body ct General Medicine Iterative reconstruction Manikins Radiation Dosage Effective dose (radiation) Imaging phantom 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Effective energy 030220 oncology & carcinogenesis Humans Dosimetry Medicine Female Tomography X-Ray Computed Nuclear medicine business |
| Zdroj: | Japanese Journal of Radiological Technology. 73:258-266 |
| ISSN: | 1881-4883 0369-4305 |
| DOI: | 10.6009/jjrt.2017_jsrt_73.4.258 |
| Popis: | Objective To study whether the actual radiation exposure is different between computed tomography (CT) scanners and medical centers when the same patient is scanned, we investigated the actual effective doses for a whole body (Chest-Pelvis) CT scan in a multicenter study. Materials and methods Data from subjects were collected using 12 CT scanners at six medical centers in Yamagata city. Effective-dose data were acquired by scanning the same phantom (ATOM Dosimetry Phantoms Model702-B) using 120 kV tube voltage. Effective doses were calculated using corrected data from a radiophotoluminescent glass dosimeter (GD-302M). GD-302M had energy- dependent issues, which needed to be corrected. Also, differences in sensitivity based on arrangement within the phantom were insignificant. Results The mean effective energy was 48.6 keV (range, 42.5-55.4 keV), and the mean effective dose was 16.3 mSv (range, 8.9-26.0 mSv). The mean effective dose with a hybrid type iterative reconstruction was 10.7 mSv (range, 8.9-16.4 mSv), but the mean effective dose without any iterative reconstruction was 20.3 mSv (range, 16.2-26.0 mSv). We found an approximate linear correlation between dose length product (DLP) on operation consoles and the effective dose. Conclusion We suggest that the actual radiation exposure was different at each medical center when the same patient is scanned. |
| Databáze: | OpenAIRE |
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