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[Organ-based Tube-current Modulation Applied on Different MDCT Scanners: Reduction in the Radiation Dose to the Eye Lens at Head CT]
- Source :
- Nihon Hoshasen Gijutsu Gakkai zasshi. 76(4)
- Publication Year :
- 2020
-
Abstract
- Purpose Organ-based tube current modulation (OB-TCM) techniques, which are provided by three vendors, reduces the radiation dose to the lens of the eyes by decreasing the tube current, when the X-ray tube passes over the anterior surface of critical organs. However, the characteristics of dose modulation of these techniques are different. The purpose of this study was to understand the performance characteristics of OB-TCM technique of each computed tomography (CT) vendor at head CT. Methods We used three CT scanners (SOMATOM Definition Flash; Siemens Healthcare, Revolution CT; GE Healthcare, and Aquilion ONE Genesis Edition; Canon Medical Systems). We measured the radiation dose to the lens surface as evaluation of radiation dose reduction and measured the image noise as index of image quality. We measured the radiation dose rate in the air for analysis of the characteristics of dose modulation in each OB-TCM. Results When applying OB-TCM, the radiation doses for the lens surface were decreased by 28%, 22%, and 25% for Siemens, GE, and Canon CT scanners, respectively, and the image noise level was increased by 5.6%, 8.5%, and 15.1% for Siemens, GE, and Canon CT scanners, respectively. The characteristics of dose modulation in each OB-TCM were also confirmed by measured the radiation dose rate. Conclusion We confirmed that each OB-TCM has different influence on image quality and radiation doses for lens surface, due to the different characteristics of dose modulation for each CT vendor.
- Subjects :
- medicine.diagnostic_test
business.industry
Image quality
Phantoms, Imaging
Radiation dose
Computed tomography
General Medicine
Radiation
Radiation Dosage
030218 nuclear medicine & medical imaging
law.invention
Lens (optics)
03 medical and health sciences
0302 clinical medicine
Radiation Protection
law
030220 oncology & carcinogenesis
Tube current modulation
Lens, Crystalline
Image noise
Medicine
Eye lens
Nuclear medicine
business
Tomography, X-Ray Computed
Subjects
Details
- ISSN :
- 03694305
- Volume :
- 76
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Nihon Hoshasen Gijutsu Gakkai zasshi
- Accession number :
- edsair.doi.dedup.....abe58a34b756ddd8bfe35bddb3ce8b73