EVALUATION OF PATIENT EXPOSURE IN FAST kVp SWITCHING DUAL ENERGY COMPUTED TOMOGRAPHY: PHANTOM STUDY
| Autor: | K Yagami, K Matsumoto, Shane Foley, H Okada, R Suzuki, Y Tsukahara, H Takai, N Yasuda, Syouichi Suzuki, S Shigeyama, Toshiharu Miyoshi |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Radiation Dosage Imaging phantom Pelvis 030218 nuclear medicine & medical imaging Radiography Dual-Energy Scanned Projection 03 medical and health sciences 0302 clinical medicine Radiation Monitoring Abdomen Humans Dosimetry Radiology Nuclear Medicine and imaging Radiation Dosimeter Radiological and Ultrasound Technology Phantoms Imaging business.industry Public Health Environmental and Occupational Health Dual-Energy Computed Tomography General Medicine Patient exposure 030220 oncology & carcinogenesis Absorbed dose Radiography Thoracic Anthropomorphic phantom Dual energy ct Tomography X-Ray Computed Nuclear medicine business |
| Zdroj: | Radiation Protection Dosimetry. 181:261-268 |
| ISSN: | 1742-3406 0144-8420 |
| Popis: | The aim of this study was to evaluate the suitability of size specific dose estimates (SSDE) to estimate patient dose in Fast kVp switching dual energy CT. An anthropomorphic phantom (RAN-110) was repeatedly scanned (chest, abdomen and the pelvis) using a 64 detector row MDCT (Discovery CT750 HD, GE Healthcare, Milwaukee, WI, USA) with various CT parameters, including Fast kVp switching. Dosimetry was performed using thermo-luminescent dosimeters, positioned both superficially and within the phantom. SSDE was calculated for all slices of the anthropomorphic phantom using both the localiser and axial images. In Fast kVp switching, SSDE underestimated the measured absorbed dose for the chest/abdomen region ~35% at the maximum, but were in closer agreement for the pelvic region about within 10%. In single energy techniques, SSDE could not be applied in the estimation of organ doses, but in Fast kVp switching dual energy techniques, SSDE could be applied for anatomical regions with larger thicknesses. |
| Databáze: | OpenAIRE |
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