Dual-energy computed tomography of the neck—optimizing tube current settings and radiation dose using a 3D-printed patient phantom
| Autor: | Wiebke Kress, Michael Scheel, Torsten Diekhoff, Bernd Hamm, Paul Jahnke |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Image quality Dual-Energy Computed Tomography Signal Imaging phantom 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Hounsfield scale Radiology Nuclear Medicine and imaging Original Article Tomography Monochromatic color Nuclear medicine business Sternocleidomastoid muscle 030217 neurology & neurosurgery |
| Zdroj: | Quant Imaging Med Surg |
| Popis: | BACKGROUND: Dual-energy computed tomography (DECT) is increasingly used in studies and clinical practice. However, the best protocol is controversially discussed and whether it exhibits more radiation exposure compared to conventional protocols. Thus, the purpose of the study was to determine optimal tube current settings for DECT in a 3D-printed anthropomorphic phantom of the neck. METHODS: A 3D-printed iodinated ink based phantom of a contrast enhanced CT of the neck was imaged. Six dual-energy multi-detector computed tomography scans were performed with six different tube currents (80 kVp: 30–400 mAs; 135 kVp: 5–160 mAs). 120 virtual blended images (VBIs) and 66 virtual monochromatic images (VMIs) were reconstructed and 12 regions of interest (bilaterally: common carotid arteries, subcutaneous soft tissue, mandibular bone, sternocleidomastoid muscle, submandibular gland, and mid-image: vertebral body of C2 and pharyngeal space) in six consecutive slices resulting in 96 measurements per scan were performed. Hounsfield units and signal- and contrast-to-noise ratio were compared to single-energy computed tomography as standard of reference. RESULTS: VBIs overestimated the Hounsfield units (P |
| Databáze: | OpenAIRE |
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