S Gordic1, L Desbiolles2, P Stolzmann1, L Gantner1, S Leschka2, D B Husarik1, H Alkadhi3. 1. Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Switzerland. 2. Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Switzerland; Division of Radiology and Nuclear Medicine, Kantonsspital St Gallen, Switzerland. 3. Institute of Diagnostic and Interventional Radiology, University Hospital Zurich, Switzerland. Electronic address: hatem.alkadhi@usz.ch.
Abstract
AIM: To determine qualitative and quantitative image-quality parameters in abdominal imaging using advanced modelled iterative reconstruction (ADMIRE) with third-generation dual-source 192 section CT. MATERIALS AND METHODS: Forty patients undergoing abdominal portal-venous CT at different tube voltage levels (90, 100, 110, and 120 kVp, n = 10 each) and 10 consecutive patients undergoing abdominal non-enhanced low-dose CT (100 kVp, 60 mAs) using a third-generation dual-source 192 section CT machine in the single-source mode were included. Images were reconstructed with filtered back projection (FBP) and ADMIRE (strength levels 1-5). Two blinded, independent readers subjectively determined image noise, artefacts, visibility of small structures, and image contrast, and measured attenuation in the liver, spleen, kidney, muscle, fat, and urinary bladder, and objective image noise. RESULTS: Subjective noise was significantly lower and image contrast significantly higher for each increasing ADMIRE strength level and also for ADMIRE 1 compared to FBP (all, p < 0.001). No significant differences were found for artefact and visibility ratings among image sets (all, p > 0.05). Attenuation was similar across tube voltage-image datasets in all anatomical regions (all, p > 0.05). Objective noise was significantly lower for each increasing ADMIRE strength level, and for ADMIRE 1 compared to FBP (all, p < 0.001, maximal reduction 53%). Independent predictors of noise were tube voltage (p < 0.05) and current (p < 0.001), diameter (p < 0.05), and reconstruction algorithm (p<0.001); the amount of noise reduction was related only to the reconstruction algorithm (p < 0.001). CONCLUSION: Abdominal CT using ADMIRE results in an improved image quality with lower image noise as compared with FBP, while the attenuation of various anatomical regions remains constant among reconstruction algorithms.
AIM: To determine qualitative and quantitative image-quality parameters in abdominal imaging using advanced modelled iterative reconstruction (ADMIRE) with third-generation dual-source 192 section CT. MATERIALS AND METHODS: Forty patients undergoing abdominal portal-venous CT at different tube voltage levels (90, 100, 110, and 120 kVp, n = 10 each) and 10 consecutive patients undergoing abdominal non-enhanced low-dose CT (100 kVp, 60 mAs) using a third-generation dual-source 192 section CT machine in the single-source mode were included. Images were reconstructed with filtered back projection (FBP) and ADMIRE (strength levels 1-5). Two blinded, independent readers subjectively determined image noise, artefacts, visibility of small structures, and image contrast, and measured attenuation in the liver, spleen, kidney, muscle, fat, and urinary bladder, and objective image noise. RESULTS: Subjective noise was significantly lower and image contrast significantly higher for each increasing ADMIRE strength level and also for ADMIRE 1 compared to FBP (all, p < 0.001). No significant differences were found for artefact and visibility ratings among image sets (all, p > 0.05). Attenuation was similar across tube voltage-image datasets in all anatomical regions (all, p > 0.05). Objective noise was significantly lower for each increasing ADMIRE strength level, and for ADMIRE 1 compared to FBP (all, p < 0.001, maximal reduction 53%). Independent predictors of noise were tube voltage (p < 0.05) and current (p < 0.001), diameter (p < 0.05), and reconstruction algorithm (p<0.001); the amount of noise reduction was related only to the reconstruction algorithm (p < 0.001). CONCLUSION: Abdominal CT using ADMIRE results in an improved image quality with lower image noise as compared with FBP, while the attenuation of various anatomical regions remains constant among reconstruction algorithms.
Authors: Stefanie Mangold; Julian L Wichmann; U Joseph Schoepf; Zachary B Poole; Christian Canstein; Akos Varga-Szemes; Damiano Caruso; Fabian Bamberg; Konstantin Nikolaou; Carlo N De Cecco Journal: Eur Radiol Date: 2016-02-04 Impact factor: 5.315
Authors: Sonja Gordic; Lotus Desbiolles; Martin Sedlmair; Robert Manka; André Plass; Bernhard Schmidt; Daniela B Husarik; Francesco Maisano; Simon Wildermuth; Hatem Alkadhi; Sebastian Leschka Journal: Eur Radiol Date: 2015-06-03 Impact factor: 5.315
Authors: Stefanie Mangold; Julian L Wichmann; U Joseph Schoepf; Sheldon E Litwin; Christian Canstein; Akos Varga-Szemes; Giuseppe Muscogiuri; Stephen R Fuller; Andrew C Stubenrauch; Konstantin Nikolaou; Carlo N De Cecco Journal: Eur Radiol Date: 2015-12-28 Impact factor: 5.315
Authors: J-E Scholtz; M Kaup; K Hüsers; M H Albrecht; B Bodelle; S C Metzger; J M Kerl; R W Bauer; T Lehnert; T J Vogl; J L Wichmann Journal: AJNR Am J Neuroradiol Date: 2015-10-01 Impact factor: 3.825
Authors: Stefanie Mangold; Julian L Wichmann; U Joseph Schoepf; Damiano Caruso; Christian Tesche; Daniel H Steinberg; Akos Varga-Szemes; Andrew C Stubenrauch; Richard R Bayer; Matthew Biancalana; Konstantin Nikolaou; Carlo N De Cecco Journal: Eur Radiol Date: 2016-09-28 Impact factor: 5.315