scholarly journals Dose reduction potential of iterative reconstruction algorithms in neck CTA—a simulation study

2016 ◽  
Vol 45 (8) ◽  
pp. 20160228 ◽  
Author(s):  
Stephan Ellmann ◽  
Ferdinand Kammerer ◽  
Thomas Allmendinger ◽  
Michael Brand ◽  
Rolf Janka ◽  
...  
Keyword(s):  
Dose Reduction ◽  
Simulation Study ◽  
Iterative Reconstruction ◽  
Reduction Potential ◽  
Reconstruction Algorithms

The impact of CT radiation dose reduction and iterative reconstruction algorithms from four different vendors on coronary calcium scoring

2014 ◽  
Vol 24 (9) ◽  
pp. 2201-2212 ◽  
Author(s):  
Martin J. Willemink ◽  
Richard A. P. Takx ◽  
Pim A. de Jong ◽  
Ricardo P. J. Budde ◽  
Ronald L. A. W. Bleys ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Dose Reduction ◽  
Iterative Reconstruction ◽  
Radiation Dose Reduction ◽  
Coronary Calcium ◽  
Calcium Scoring ◽  
Reconstruction Algorithms ◽  
Coronary Calcium Scoring ◽  
Ct Radiation ◽  
The Impact

Dose reduction potential of the scanning geometry CT D'OR: a simulation study

2009 ◽  
Author(s):  
Hugo de las Heras ◽  
Oleg Tischenko ◽  
Helmut Schlattl ◽  
Yuan Xu ◽  
Christoph Hoeschen
Keyword(s):  
Dose Reduction ◽  
Simulation Study ◽  
Reduction Potential ◽  
Scanning Geometry

scholarly journals The influence of model iterative reconstruction on image quality in standard and low-dose computer tomography of the chest. experimental study.

2020 ◽  
Author(s):  
Антон Yu. Silin ◽  
Ivan S. Gruzdev ◽  
Sergey P. Morozov
Keyword(s):  
Radiation Dose ◽  
Dose Reduction ◽  
Spatial Resolution ◽  
Iterative Reconstruction ◽  
Low Dose ◽  
Reconstruction Algorithms ◽  
Anthropomorphic Phantom ◽  
Pulmonary Lesions ◽  
Calibration Phantom

Background: One of the ways to reduce the radiation dose in CT is to improve image reconstruction algorithms. The latest offer from scanner manufacturers is Model Iterative Reconstruction (MIR). Aims: To compare the quality of visualization of the structures of the organs of the chest and to prove the effectiveness of the low-dose protocol with iterative model reconstruction. Materials and methods: A calibration phantom with a spatial resolution module and an anthropomorphic phantom of the upper body of an adult with nodules in the lungs was scanned on two CT scanners of different manufacturers using the standard dose protocol (SDCT) with algorithms of hybrid iterative reconstruction (HIR) of images and MIR and low-dose protocol (LDCT) and MIR algorithm. The quality of the obtained images was evaluated by the parameters: noise (SD), the contrast-to-noise ratio (CNR), spatial resolution and visualization of pulmonary nodules. The radiation dose was calculated according to the scanner data, the data of individual dosimeters placed on the anthropomorphic phantom, and using a dosimetric phantom. Results: The average SD was 11.5; 24.4 and 21.6; CNR 85.47; 40.6 and 45.6; spatial resolution 2 mm; 2 mm and 3 mm for SDCT with MIR, SDCT with HIR and LDCT with MIR, respectively. Visualization of pulmonary lesions remained excellent in all cases. The radiation dose in case of SDCT was 2.7, and in case of LDCT - 0.67 mSv. The dose reduction was confirmed by dosimeter data. Similar results were obtained by repeating the experiment on a second scanner. Conclusions: The average SD was 11.5; 24.4 and 21.6; CNR 85.47; 40.6 and 45.6; spatial resolution 2 mm; 2 mm and 3 mm for SDCT with MIR, SDCT with HIR and LDCT with MIR, respectively. Visualization of pulmonary lesions remained excellent in all cases. The radiation dose in case of SDCT was 2.7, and in case of LDCT - 0.67 mSv. The dose reduction was confirmed by dosimeter data. Similar results were obtained by repeating the experiment on a second scanner.

scholarly journals X-Ray Dose Reduction in Abdominal Computed Tomography Using Advanced Iterative Reconstruction Algorithms

PLoS ONE ◽  
2014 ◽  
Vol 9 (3) ◽  
pp. e92568 ◽  
Author(s):  
Peigang Ning ◽  
Shaocheng Zhu ◽  
Dapeng Shi ◽  
Ying Guo ◽  
Minghua Sun
Keyword(s):  
Computed Tomography ◽  
Dose Reduction ◽  
Iterative Reconstruction ◽  
Reconstruction Algorithms ◽  
X Ray ◽  
Abdominal Computed Tomography

CT pulmonary angiography: dose reduction via a next generation iterative reconstruction algorithm

2018 ◽  
Vol 60 (4) ◽  
pp. 478-487 ◽  
Author(s):  
Andreas Sauter ◽  
Thomas Koehler ◽  
Bernhard Brendel ◽  
Juliane Aichele ◽  
Jan Neumann ◽  
...  
Keyword(s):  
Image Quality ◽  
Dose Reduction ◽  
Iterative Reconstruction ◽  
Low Dose ◽  
Reconstruction Algorithm ◽  
Pulmonary Angiography ◽  
Reconstruction Algorithms ◽  
Iterative Reconstruction Algorithm ◽  
Dose Levels ◽  
Rule Out

Background Computed tomography pulmonary angiography (CTPA) is the standard imaging modality for detection or rule out of pulmonary embolism (PE); however, radiation exposure is a serious concern. With iterative reconstruction algorithms a distinct dose reduction could be achievable. Purpose To evaluate a next generation iterative reconstruction algorithm for detection or rule-out of PE in simulated low-dose CTPA. Material and Methods Low-dose CT datasets with 50%, 25%, and 12.5% of the original tube current were simulated based on CTPA examinations of 92 patients with suspected PE. All datasets were reconstructed with two reconstruction algorithms: standard filtered back-projection (FBP) and iterative model reconstruction (IMR). In total, 736 CTPA datasets were evaluated by three blinded radiologists regarding image quality, diagnostic confidence, and detectability of PE. Furthermore, contrast-to-noise ratio (CNR) was calculated. Results Images reconstructed with IMR showed better detectability of PE than images reconstructed with FBP, especially at lower dose levels. With IMR, sensitivity was over 95% for central and segmental PE down to a dose level of 25%. Significantly higher subjective image quality was shown at lower dose levels (25% and 12.5%) for IMR images whereas it was higher for FBP images at higher dose levels. FBP was rated as showing less artificial image appearance. CNR was significantly higher with IMR at all dose levels. Conclusion By using IMR, a dose reduction of up to 50% while maintaining satisfactory image quality seems feasible in standard clinical situations, resulting in a mean effective dose of 1.38 mSv for CTPA.

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