scholarly journals Virtual monochromatic imaging in dual-source dual-energy CT: Radiation dose and image quality

2011 ◽  
Vol 38 (12) ◽  
pp. 6371-6379 ◽  
Author(s):  
Lifeng Yu ◽  
Jodie A. Christner ◽  
Shuai Leng ◽  
Jia Wang ◽  
Joel G. Fletcher ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Virtual Monochromatic Imaging ◽  
Monochromatic Imaging ◽  
Ct Radiation ◽  
Dual Source

Trends in radiation dose and image quality for pediatric patients with a multidetector CT and a third-generation dual-source dual-energy CT

2019 ◽  
Vol 124 (8) ◽  
pp. 745-752 ◽  
Author(s):  
Andrea Agostini ◽  
Alberto Mari ◽  
Cecilia Lanza ◽  
Nicolo’ Schicchi ◽  
Alessandra Borgheresi ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Pediatric Patients ◽  
Multidetector Ct ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Third Generation ◽  
Dual Source

Single- and dual-energy CT pulmonary angiography using second- and third-generation dual-source CT systems: comparison of radiation dose and image quality

2019 ◽  
Vol 29 (9) ◽  
pp. 4603-4612 ◽  
Author(s):  
Lukas Lenga ◽  
Franziska Trapp ◽  
Moritz H. Albrecht ◽  
Julian L. Wichmann ◽  
Addison A. Johnson ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Pulmonary Angiography ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Third Generation ◽  
Dual Source Ct ◽  
Ct Pulmonary Angiography ◽  
Dual Source

Comparison of image quality and radiation dose of different pulmonary CTA protocols on a 128-slice CT: high-pitch dual source CT, dual energy CT and conventional spiral CT

2011 ◽  
Vol 22 (2) ◽  
pp. 279-286 ◽  
Author(s):  
Tobias De Zordo ◽  
Klemens von Lutterotti ◽  
Christian Dejaco ◽  
Peter F. Soegner ◽  
Renate Frank ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Spiral Ct ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Dual Source Ct ◽  
High Pitch ◽  
Dual Source

scholarly journals Virtual monochromatic imaging in dual-source and dual-energy CT for visualization of acute ischemic stroke

2015 ◽  
Vol 67 (1) ◽  
pp. 103-107 ◽  
Author(s):  
Hidetake Hara ◽  
Hiroshi Muraishi ◽  
Hiroki Matsuzawa ◽  
Toshiyuki Inoue ◽  
Yasuo Nakajima ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Virtual Monochromatic Imaging ◽  
Monochromatic Imaging ◽  
Dual Source

New Fast kVp Switching Dual-Energy CT: Reduced Severity of Beam Hardening Artifacts and Improved Image Quality in Reduced-Iodine Virtual Monochromatic Imaging

2020 ◽  
Vol 27 (11) ◽  
pp. 1586-1593
Author(s):  
Haruto Sugawara ◽  
Tomoko Takayanagi ◽  
Takuya Ishikawa ◽  
Yoshiaki Katada ◽  
Rika Fukui ◽  
...  
Keyword(s):  
Image Quality ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Beam Hardening ◽  
Virtual Monochromatic Imaging ◽  
Monochromatic Imaging

Single- and dual-energy CT of the abdomen: comparison of radiation dose and image quality of 2nd and 3rd generation dual-source CT

2016 ◽  
Vol 27 (2) ◽  
pp. 642-650 ◽  
Author(s):  
Julian L. Wichmann ◽  
Andrew D. Hardie ◽  
U. Joseph Schoepf ◽  
Lloyd M. Felmly ◽  
Jonathan D. Perry ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Dual Source Ct ◽  
Dual Source

scholarly journals Diagnosis of Pulmonary Artery Embolism: Comparison of Single-Source CT and 3rd Generation Dual-Source CT using a Dual-Energy Protocol Regarding Image Quality and Radiation Dose

2017 ◽  
Vol 189 (06) ◽  
pp. 527-536 ◽  
Author(s):  
Bernhard Petritsch ◽  
Aleksander Kosmala ◽  
Tobias Gassenmaier ◽  
Andreas Weng ◽  
Simon Veldhoen ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Dual Source Ct ◽  
Single Source ◽  
Subjective Image Quality ◽  
Artery Embolism ◽  
Dual Source ◽  
Noise Ratio

Purpose To compare radiation dose, subjective and objective image quality of 3 rd generation dual-source CT (DSCT) and dual-energy CT (DECT) with conventional 64-slice single-source CT (SSCT) for pulmonary CTA. Materials and Methods 180 pulmonary CTA studies were performed in three patient cohorts of 60 patients each. Group 1: conventional SSCT 120 kV (ref.); group 2: single-energy DSCT 100 kV (ref.); group 3: DECT 90/Sn150 kV. CTDIvol, DLP, effective radiation dose were reported, and CT attenuation (HU) was measured on three central and peripheral levels. The signal-to-noise-ratio (SNR) and contrast-to-noise-ratio (CNR) were calculated. Two readers assessed subjective image quality according to a five-point scale. Results Mean CTDIvol and DLP were significantly lower in the dual-energy group compared to the SSCT group (p < 0.001 [CTDIvol]; p < 0.001 [DLP]) and the DSCT group (p = 0.003 [CTDIvol]; p = 0.003 [DLP]), respectively. The effective dose in the DECT group was 2.79 ± 0.95 mSv and significantly smaller than in the SSCT group (4.60 ± 1.68 mSv, p < 0.001) and the DSCT group (4.24 ± 2.69 mSv, p = 0.003). The SNR and CNR were significantly higher in the DSCT group (p < 0.001). Subjective image quality did not differ significantly among the three protocols and was rated good to excellent in 75 % (135/180) of cases with an inter-observer agreement of 80 %. Conclusion Dual-energy pulmonary CTA protocols of 3 rd generation dual-source scanners allow for significant reduction of radiation dose while providing excellent image quality and potential additional information by means of perfusion maps. Key Points: Citation Format

Evaluation of image quality and radiation dose of abdominal dual-energy CT

2017 ◽  
Vol 59 (7) ◽  
pp. 845-852 ◽  
Author(s):  
David Schmidt ◽  
Marcus Söderberg ◽  
Mats Nilsson ◽  
Håkan Lindvall ◽  
Christina Christoffersen ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Effective Dose ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Noise Levels ◽  
Dose Length Product ◽  
Widespread Implementation ◽  
Dual Source ◽  
The Mean

Background Dual-energy computed tomography (DECT) has conceptually been known since the late 1970s and commercially available as dual-source CT (DSCT) systems since 2006; however, the technique has not yet seen widespread implementation in routine protocols. Part of the cause for this is likely due to misconceptions about radiation dose and/or image quality when using DECT. Purpose To compare image quality and radiation dose of single-energy CT (SECT) and DECT abdominal examinations obtained in clinical practice on a second generation DSCT. Material and Methods A total of 495 included patients (mean age = 70.9 years) were retrospectively analyzed after undergoing either SECT (120 kVp and age-based mAs) or DECT examinations (80/Sn140 kVp and age-based mAs). The patients were divided into two groups based on examination type (247 SECT, 248 DECT), which were then subdivided into two groups, each based on age. Image noise was measured in the liver and image quality was subjectively assessed in 100 randomly selected patients. Results Noise levels were significantly lower in DECT (13.9 HU) compared with SECT (14.7 HU) ( P < 0.05). No significant differences in subjective image quality were found between DECT and SECT, except for one criterion in the 50–74-year age group. The mean dose-length product (DLP) (376 mGy-cm) and effective dose (6.1 mSv) of DECT were significantly lower than the DLP (513 mGy-cm) and effective dose (8.4 mSv) of SECT ( P < 0.05). Conclusion DECT can be implemented in routine clinical use without negatively impacting image quality while lowering radiation dose to the patient.

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