Iterative reconstruction for low dose dual energy CT using information-divergence constrained spectral redundancy information

2018 ◽  
Vol 26 (2) ◽  
pp. 311-330 ◽  
Author(s):  
Jiahui Lin ◽  
Hao Zhang ◽  
Jing Huang ◽  
Zhaoying Bian ◽  
Shanli Zhang ◽  
...  
Keyword(s):  
Iterative Reconstruction ◽  
Low Dose ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Information Divergence

Dual-energy CT for the characterization of urinary calculi: In vitro and in vivo evaluation of a low-dose scanning protocol

2009 ◽  
Vol 19 (6) ◽  
pp. 1553-1559 ◽  
Author(s):  
C. Thomas ◽  
O. Patschan ◽  
D. Ketelsen ◽  
I. Tsiflikas ◽  
A. Reimann ◽  
...  
Keyword(s):  
Low Dose ◽  
Urinary Calculi ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
In Vivo Evaluation ◽  
Scanning Protocol

scholarly journals First experience with combined use of adaptive statistical iterative reconstruction and gemstone spectral imaging in spinal fusion CT images

2015 ◽  
Author(s):  
Fengdan Wang ◽  
Yan Zhang ◽  
Zhengyu Jin ◽  
Richard Zwar
Keyword(s):  
Image Quality ◽  
Iterative Reconstruction ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Metal Artifacts ◽  
Adaptive Statistical Iterative Reconstruction ◽  
Subjective Image Quality ◽  
Gemstone Spectral Imaging ◽  
Statistical Iterative Reconstruction ◽  
Combined Use

Objective. To explore whether the image noises and the metal artifacts could be further managed by the combined use of two technologies, the adaptive statistical iterative reconstruction (ASIR) and the monochromatic imaging generated by gemstone spectral imaging (GSI) dual-energy CT. Materials and Methods. Fifty-one patients with 318 spinal pedicle screws were prospectively scanned with dual energy CT by using fast kV-switching GSI between 80 and 140 kVp. The monochromatic GSI images at 110 keV were reconstructed either without ASIR or with ASIR of various levels (30%, 50%, 70% and 100%). For these five sets of images, both objective and subjective image quality assessments were performed to evaluate the image quality. Results. With objective image quality assessment, the metal artifacts (measured by an artifacts index) significantly decreased when increasing levels of ASIR was utilized (p < 0.001). Moreover, adding ASIR to GSI also decreased the image noise (p < 0.001) and improved the signal-to-noise ratio (SNR, p < 0.001). With subjective image quality analysis, the inter-reader agreements were good, with intra-class correlation coefficients (ICC) of 0.89 to 0.99. Meanwhile, the visualization of the peri-implant soft tissue was improved at higher ASIR levels (p < 0.001). Conclusion. Combined use of ASIR and GSI is shown to decrease the image noise and improve the image quality in post-spinal fusion CT scans. Optimal results were achieved with ASIR levels of over 70%.

SU-E-I-41: Dictionary Learning Based Quantitative Reconstruction for Low-Dose Dual-Energy CT (DECT)

2015 ◽  
Vol 42 (6Part6) ◽  
pp. 3250-3251
Author(s):  
Q Xu ◽  
L Xing ◽  
G Xiong ◽  
K Elmore ◽  
J Min
Keyword(s):  
Dictionary Learning ◽  
Low Dose ◽  
Dual Energy ◽  
Dual Energy Ct ◽  
Quantitative Reconstruction

Performance evaluation of multi-material electronic cleansing for ultra-low-dose dual-energy CT colonography

2016 ◽  
Author(s):  
Rie Tachibana ◽  
Naja Kohlhase ◽  
Janne J. Näppi ◽  
Toru Hironaka ◽  
Junko Ota ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Ct Colonography ◽  
Low Dose ◽  
Dual Energy ◽  
Dual Energy Ct

Low-dose dual-energy CT

2011 ◽  
Vol 8 (1) ◽  
pp. 7-7
Author(s):  
Sarah Payton
Keyword(s):  
Low Dose ◽  
Dual Energy ◽  
Dual Energy Ct
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