Reduction of respiratory motion artifacts for free-breathing whole-heart coronary MRA by weighted iterative reconstruction

2014 ◽  
Vol 73 (5) ◽  
pp. 1885-1895 ◽  
Author(s):  
Christoph Forman ◽  
Davide Piccini ◽  
Robert Grimm ◽  
Jana Hutter ◽  
Joachim Hornegger ◽  
...  
Keyword(s):  
Iterative Reconstruction ◽  
Respiratory Motion ◽  
Free Breathing ◽  
Motion Artifacts ◽  
Coronary Mra ◽  
Whole Heart

scholarly journals 3D radial sampling and 3D affine transform-based respiratory motion correction technique for free-breathing whole-heart coronary MRA with 100% imaging efficiency

2011 ◽  
Vol 65 (5) ◽  
pp. 1269-1277 ◽  
Author(s):  
Himanshu Bhat ◽  
Lan Ge ◽  
Sonia Nielles-Vallespin ◽  
Sven Zuehlsdorff ◽  
Debiao Li
Keyword(s):  
Motion Correction ◽  
Respiratory Motion ◽  
Free Breathing ◽  
Respiratory Motion Correction ◽  
Radial Sampling ◽  
Affine Transform ◽  
Coronary Mra ◽  
Correction Technique ◽  
Whole Heart

scholarly journals Free-breathing 3D whole-heart coronary mra using respiratory motion-resolved sparse reconstruction

2016 ◽  
Vol 18 (S1) ◽  
Author(s):  
Davide Piccini ◽  
Li Feng ◽  
Gabriele Bonanno ◽  
Simone Coppo ◽  
Jérôme Yerly ◽  
...  
Keyword(s):  
Respiratory Motion ◽  
Free Breathing ◽  
Sparse Reconstruction ◽  
Coronary Mra ◽  
Whole Heart

scholarly journals Single-Breath-Hold Whole-heart Unenhanced Coronary MRA Using Multi-shot Gradient Echo EPI at 3T: Comparison with Free-breathing Turbo-field-echo Coronary MRA on Healthy Volunteers

2018 ◽  
Vol 17 (2) ◽  
pp. 161-167
Author(s):  
Yuji Iyama ◽  
Takeshi Nakaura ◽  
Yasunori Nagayama ◽  
Seitaro Oda ◽  
Daisuke Utsunomiya ◽  
...  
Keyword(s):  
Healthy Volunteers ◽  
Free Breathing ◽  
Breath Hold ◽  
Gradient Echo ◽  
Single Breath ◽  
Coronary Mra ◽  
Single Breath Hold ◽  
Whole Heart ◽  
Turbo Field Echo

scholarly journals Correcting versus resolving respiratory motion in free-breathing whole-heart MRA: a comparison in patients with thoracic aortic disease

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Robert E. Stroud ◽  
Davide Piccini ◽  
U. Joseph Schoepf ◽  
John Heerfordt ◽  
Jérôme Yerly ◽  
...  
Keyword(s):  
Respiratory Motion ◽  
Free Breathing ◽  
Aortic Disease ◽  
Thoracic Aortic Disease ◽  
Whole Heart

A quantitative comparison between a navigated Cartesian and a self‐navigated radial protocol from clinical studies for free‐breathing 3D whole‐heart bSSFP coronary MRA

2019 ◽  
Vol 84 (1) ◽  
pp. 157-169
Author(s):  
John Heerfordt ◽  
Matthias Stuber ◽  
Aurélien Maillot ◽  
Veronica Bianchi ◽  
Davide Piccini
Keyword(s):  
Clinical Studies ◽  
Free Breathing ◽  
Quantitative Comparison ◽  
Coronary Mra ◽  
Whole Heart

scholarly journals Improved respiratory self-navigation for 3D radial acquisitions through the use of a pencil-beam 2D-T2 -prep for free-breathing, whole-heart coronary MRA

2017 ◽  
Vol 79 (3) ◽  
pp. 1293-1303 ◽  
Author(s):  
Andrew J. Coristine ◽  
Jerome Chaptinel ◽  
Giulia Ginami ◽  
Gabriele Bonanno ◽  
Simone Coppo ◽  
...  
Keyword(s):  
Free Breathing ◽  
Pencil Beam ◽  
Coronary Mra ◽  
Whole Heart

scholarly journals Respiratory Motion-Registered Isotropic Whole-Heart T2 Mapping in Patients With Acute Non-ischemic Myocardial Injury

2021 ◽  
Vol 8 ◽  
Author(s):  
Karolina Dorniak ◽  
Lorenzo Di Sopra ◽  
Agnieszka Sabisz ◽  
Anna Glinska ◽  
Christopher W. Roy ◽  
...  
Keyword(s):  
Healthy Volunteers ◽  
Respiratory Motion ◽  
Myocardial Injury ◽  
T2 Mapping ◽  
Myocardial Edema ◽  
Free Breathing ◽  
Myocardial Inflammation ◽  
Patient Cohort ◽  
Significant Difference ◽  
Whole Heart

Background: T2 mapping is a magnetic resonance imaging technique that can be used to detect myocardial edema and inflammation. However, the focal nature of myocardial inflammation may render conventional 2D approaches suboptimal and make whole-heart isotropic 3D mapping desirable. While self-navigated 3D radial T2 mapping has been demonstrated to work well at a magnetic field strength of 3T, it results in too noisy maps at 1.5T. We therefore implemented a novel respiratory motion-resolved compressed-sensing reconstruction in order to improve the 3D T2 mapping precision and accuracy at 1.5T, and tested this in a heterogeneous patient cohort.Materials and Methods: Nine healthy volunteers and 25 consecutive patients with suspected acute non-ischemic myocardial injury (sarcoidosis, n = 19; systemic sclerosis, n = 2; acute graft rejection, n = 2, and myocarditis, n = 2) were included. The free-breathing T2 maps were acquired as three ECG-triggered T2-prepared 3D radial volumes. A respiratory motion-resolved reconstruction was followed by image registration of the respiratory states and pixel-wise T2 mapping. The resulting 3D maps were compared to routine 2D T2 maps. The T2 values of segments with and without late gadolinium enhancement (LGE) were compared in patients.Results: In the healthy volunteers, the myocardial T2 values obtained with the 2D and 3D techniques were similar (45.8 ± 1.8 vs. 46.8 ± 2.9 ms, respectively; P = 0.33). Conversely, in patients, T2 values did differ between 2D (46.7 ± 3.6 ms) and 3D techniques (50.1 ± 4.2 ms, P = 0.004). Moreover, with the 2D technique, T2 values of the LGE-positive segments were similar to those of the LGE-negative segments (T2LGE−= 46.2 ± 3.7 vs. T2LGE+ = 47.6 ± 4.1 ms; P = 0.49), whereas the 3D technique did show a significant difference (T2LGE− = 49.3 ± 6.7 vs. T2LGE+ = 52.6 ± 8.7 ms, P = 0.006).Conclusion: Respiratory motion-registered 3D radial imaging at 1.5T led to accurate isotropic 3D whole-heart T2 maps, both in the healthy volunteers and in a small patient cohort with suspected non-ischemic myocardial injury. Significantly higher T2 values were found in patients as compared to controls in 3D but not in 2D, suggestive of the technique's potential to increase the sensitivity of CMR at earlier stages of disease. Further study will be needed to demonstrate its accuracy.

SU-GG-J-19: A Theoretical Model for Respiratory Motion Artifacts in Free Breathing CT Scans

2008 ◽  
Vol 35 (6Part5) ◽  
pp. 2682-2682
Author(s):  
J Lewis ◽  
S Jiang
Keyword(s):  
Theoretical Model ◽  
Respiratory Motion ◽  
Free Breathing ◽  
Motion Artifacts ◽  
Ct Scans

A theoretical model for respiratory motion artifacts in free-breathing CT scans

2009 ◽  
Vol 54 (3) ◽  
pp. 745-755 ◽  
Author(s):  
John H Lewis ◽  
Steve B Jiang
Keyword(s):  
Theoretical Model ◽  
Respiratory Motion ◽  
Free Breathing ◽  
Motion Artifacts ◽  
Ct Scans

Free-breathing whole-heart coronary MRA with 3D radial SSFP and self-navigated image reconstruction

2005 ◽  
Vol 54 (2) ◽  
pp. 476-480 ◽  
Author(s):  
C. Stehning ◽  
P. Börnert ◽  
K. Nehrke ◽  
H. Eggers ◽  
M. Stuber
Keyword(s):  
Image Reconstruction ◽  
Free Breathing ◽  
Coronary Mra ◽  
Whole Heart
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