Effect of automated tube voltage selection, integrated circuit detector and advanced iterative reconstruction on radiation dose and image quality of 3rd generation dual-source aortic CT angiography: An intra-individual comparison
| Autor: | Akos Varga-Szemes, Stefanie Mangold, Stephen R. Fuller, Christian Canstein, Julian L. Wichmann, Fabian Bamberg, Damiano Caruso, Carlo N. De Cecco, Konstantin Nikolaou, U. Joseph Schoepf |
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| Rok vydání: | 2016 |
| Předmět: |
Male
aorta automated tube voltage selection CT angiography dual-source CT radiation dose reduction Computed Tomography Angiography Image quality Contrast Media Iterative reconstruction Integrated circuit 030204 cardiovascular system & hematology Radiation Dosage Aortography 030218 nuclear medicine & medical imaging law.invention 03 medical and health sciences 0302 clinical medicine Contrast-to-noise ratio law Hounsfield scale Image noise Humans Medicine Radiology Nuclear Medicine and imaging Aorta Aged Retrospective Studies Observer Variation Radon transform business.industry Detector General Medicine Middle Aged Aortic Aneurysm Aortic Dissection Radiographic Image Interpretation Computer-Assisted Female Nuclear medicine business |
| Zdroj: | European Journal of Radiology. 85:972-978 |
| ISSN: | 0720-048X |
| DOI: | 10.1016/j.ejrad.2016.02.021 |
| Popis: | To compare, on an intra-individual basis, the effect of automated tube voltage selection (ATVS), integrated circuit detector and advanced iterative reconstruction on radiation dose and image quality of aortic CTA studies using 2nd and 3rd generation dual-source CT (DSCT).We retrospectively evaluated 32 patients who had undergone CTA of the entire aorta with both 2nd generation DSCT at 120kV using filtered back projection (FBP) (protocol 1) and 3rd generation DSCT using ATVS, an integrated circuit detector and advanced iterative reconstruction (protocol 2). Contrast-to-noise ratio (CNR) was calculated. Image quality was subjectively evaluated using a five-point scale. Radiation dose parameters were recorded.All studies were considered of diagnostic image quality. CNR was significantly higher with protocol 2 (15.0±5.2 vs 11.0±4.2; p.0001). Subjective image quality analysis revealed no significant differences for evaluation of attenuation (p=0.08501) but image noise was rated significantly lower with protocol 2 (p=0.0005). Mean tube voltage and effective dose were 94.7±14.1kV and 6.7±3.9mSv with protocol 2; 120±0kV and 11.5±5.2mSv with protocol 1 (p0.0001, respectively).Aortic CTA performed with 3rd generation DSCT, ATVS, integrated circuit detector, and advanced iterative reconstruction allow a substantial reduction of radiation exposure while improving image quality in comparison to 120kV imaging with FBP. |
| Databáze: | OpenAIRE |
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