scholarly journals Effect of iterative reconstruction techniques on image quality in low radiation dose chest CT: a phantom study

2019 ◽  
Vol 25 (6) ◽  
pp. 442-450 ◽  
Author(s):  
Yan Xu ◽  
◽  
Ting-ting Zhang ◽  
Zhi-hai Hu ◽  
Juan Li ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Iterative Reconstruction ◽  
Chest Ct ◽  
Phantom Study ◽  
Low Radiation Dose

scholarly journals Impact of radiation dose and iterative reconstruction on pulmonary nodule measurements at chest CT: a phantom study

2015 ◽  
Vol 21 (6) ◽  
pp. 459-465 ◽  
Author(s):  
Hyungjin Kim ◽  
Chang Min Park ◽  
Hee-Dong Chae ◽  
Sang Min Lee ◽  
Jin Mo Goo
Keyword(s):  
Radiation Dose ◽  
Pulmonary Nodule ◽  
Iterative Reconstruction ◽  
Chest Ct ◽  
Phantom Study

Performance Evaluation of Two Iterative Reconstruction Algorithms--MBIR and ASIR, in Low Radiation Dose and Low Contrast Dose Abdominal CT in Children

2019 ◽  
Author(s):  
Jihang Sun ◽  
Lixin Yang ◽  
Zuofu Zhou ◽  
Dan Zhang ◽  
Wei Han ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Iterative Reconstruction ◽  
Image Noise ◽  
Abdominal Ct ◽  
Low Contrast ◽  
Low Radiation Dose ◽  
Contrast Dose ◽  
Contrast Enhanced Ct ◽  
Noise Ratio

Abstract Background The adverse effect of low-dose CT on image quality may be mitigated using iterative reconstructions. The purpose of this study was to evaluate the performance of the full model-based iterative reconstruction (MBIR) and adaptive statistical reconstruction (ASIR) algorithms in low radiation dose and low contrast dose abdominal contrast-enhanced CT (CECT) in children. Methods A total of 59 children (32 males and 27 females) undergoing low radiation dose (100kVp) and low contrast dose (270 mgI/ml) abdominal CECT were enrolled. The median age was 4.0 years (ranging from 0.3 to 13 years). The raw data were reconstructed with MBIR, ASIR and filtered back projection (FBP) algorithms into 6 groups (MBIR, 100%ASIR, 80%ASIR, 60%ASIR, 40%ASIR and FBP). The CT numbers, standard deviations, signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of liver, pancreas, kidney and abdominal aorta were measured. Two radiologists independently evaluated the subjective image quality including the overall image noise and structure display ability on a 4-point scale with 3 being clinically acceptable. The measurements among the reconstruction groups were compared using one-way ANOVA. Results The overall image noise score and display ability were 4.00±0.00 and 4.00±0.00 with MBIR, and 3.27±0.33 and 3.25±0.43 with ASIR100%, respectively, which met the diagnostic requirement; other reconstructions couldn’t meet the diagnostic requirements. Compared with FBP images, the noise of MBIR images was reduced by 62.86%-65.73% for the respective organs (F=48.15-80.47, P<0.05), and CNR increased by 151.38%-170.69% (F=22.94-38.02, P<0.05). Conclusions MBIR or ASIR100% improves the image quality of low radiation dose and contrast dose abdominal CT in children to meet the diagnostic requirements, and MBIR has the best performance.

Improved image quality and low radiation dose with hybrid iterative reconstruction with 80kV CT pulmonary angiography

2014 ◽  
Vol 83 (10) ◽  
pp. 1962-1969 ◽  
Author(s):  
Azien Laqmani ◽  
Marc Regier ◽  
Simon Veldhoen ◽  
Alexandra Backhaus ◽  
Felicia Wassenberg ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Iterative Reconstruction ◽  
Pulmonary Angiography ◽  
Ct Pulmonary Angiography ◽  
Low Radiation Dose ◽  
Hybrid Iterative Reconstruction
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