Quantitative evaluation of virtual monochromatic imaging for detection of microcalcifications

2020 ◽  
Author(s):  
Hyemi Kim ◽  
Minjae Lee ◽  
Dohyeon Kim ◽  
Hee-Joung Kim
Keyword(s):  
Quantitative Evaluation ◽  
Virtual Monochromatic Imaging ◽  
Monochromatic Imaging

Evaluation of three-dimensional iterative image reconstruction in virtual monochromatic imaging at 40 kilo-electron volts: phantom and clinical studies to assess the image noise and image quality in comparison with other reconstruction techniques

2020 ◽  
Vol 93 (1110) ◽  
pp. 20190675
Author(s):  
Takuya Ishikawa ◽  
Shigeru Suzuki ◽  
Yoshiaki Katada ◽  
Tomoko Takayanagi ◽  
Rika Fukui ◽  
...  
Keyword(s):  
Clinical Study ◽  
Image Reconstruction ◽  
Image Quality ◽  
Three Dimensional ◽  
Image Noise ◽  
Reconstruction Technique ◽  
Iterative Image Reconstruction ◽  
Virtual Monochromatic Imaging ◽  
Monochromatic Imaging

Objective: The purpose of this study was to evaluate the image quality in virtual monochromatic imaging (VMI) at 40 kilo-electron volts (keV) with three-dimensional iterative image reconstruction (3D-IIR). Methods: A phantom study and clinical study (31 patients) were performed with dual-energy CT (DECT). VMI at 40 keV was obtained and the images were reconstructed using filtered back projection (FBP), 50% adaptive statistical iterative reconstruction (ASiR), and 3D-IIR. We conducted subjective and objective evaluations of the image quality with each reconstruction technique. Results: The image contrast-to-noise ratio and image noise in both the clinical and phantom studies were significantly better with 3D-IIR than with 50% ASiR, and with 50% ASiR than with FBP (all, p < 0.05). The standard deviation and noise power spectra of the reconstructed images decreased in the order of 3D-IIR to 50% ASiR to FBP, while the modulation transfer function was maintained across the three reconstruction techniques. In most subjective evaluations in the clinical study, the image quality was significantly better with 3D-IIR than with 50% ASiR, and with 50% ASiR than with FBP (all, p < 0.001). Regarding the diagnostic acceptability, all images using 3D-IIR were evaluated as being fully or probably acceptable. Conclusions: The quality of VMI at 40 keV is improved by 3D-IIR, which allows the image noise to be reduced and structural details to be maintained. Advances in knowledge: The improvement of the image quality of VMI at 40 keV by 3D-IIR may increase the subjective acceptance in the clinical setting.

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

Dual-Energy Multi–Detector Row CT with Virtual Monochromatic Imaging for Improving Patient-to-Patient Uniformity of Aortic Enhancement during CT Angiography: An in Vitro and in Vivo Study

Radiology ◽  
2014 ◽  
Vol 272 (3) ◽  
pp. 895-902 ◽  
Author(s):  
Daniele Marin ◽  
Ghaneh Fananapazir ◽  
Achille Mileto ◽  
Kingshuk Roy Choudhury ◽  
Joshua M. Wilson ◽  
...  
Keyword(s):  
Ct Angiography ◽  
Dual Energy ◽  
In Vivo Study ◽  
Virtual Monochromatic Imaging ◽  
Monochromatic Imaging

Impact of Dual-Energy Multi–Detector Row CT with Virtual Monochromatic Imaging on Renal Cyst Pseudoenhancement: In Vitro and in Vivo Study

Radiology ◽  
2014 ◽  
Vol 272 (3) ◽  
pp. 767-776 ◽  
Author(s):  
Achille Mileto ◽  
Rendon C. Nelson ◽  
Ehsan Samei ◽  
Tracy A. Jaffe ◽  
Erik K. Paulson ◽  
...  
Keyword(s):  
Renal Cyst ◽  
Dual Energy ◽  
In Vivo Study ◽  
Virtual Monochromatic Imaging ◽  
Monochromatic Imaging
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