scholarly journals Compressed sensing reconstruction for undersampled breath-hold radial cine imaging with auxiliary free-breathing data

2013 ◽  
Vol 39 (1) ◽  
pp. 179-188 ◽  
Author(s):  
Seunghoon Nam ◽  
Susie N. Hong ◽  
Mehmet Akçakaya ◽  
Yongjun Kwak ◽  
Beth Goddu ◽  
...  
Keyword(s):  
Compressed Sensing ◽  
Free Breathing ◽  
Cine Imaging ◽  
Breath Hold

scholarly journals Assessment of Left Ventricular Function and Mass on Free-Breathing Compressed Sensing Real-Time Cine Imaging

2017 ◽  
Vol 81 (10) ◽  
pp. 1463-1468 ◽  
Author(s):  
Tomoyuki Kido ◽  
Teruhito Kido ◽  
Masashi Nakamura ◽  
Kouki Watanabe ◽  
Michaela Schmidt ◽  
...  
Keyword(s):  
Compressed Sensing ◽  
Left Ventricular Function ◽  
Real Time ◽  
Ventricular Function ◽  
Free Breathing ◽  
Left Ventricular ◽  
Cine Imaging

Morphological and functional assessment of the uterus: “one-stop shop imaging” using a compressed-sensing accelerated, free-breathing T1-VIBE sequence

2020 ◽  
pp. 028418512093626
Author(s):  
Daniel Hausmann ◽  
Diana Kreul ◽  
Markus Klarhöfer ◽  
Dominik Nickel ◽  
Robert Grimm ◽  
...  
Keyword(s):  
Compressed Sensing ◽  
Free Breathing ◽  
Breath Hold ◽  
Junctional Zone ◽  
Time And Motion ◽  
One Stop ◽  
Resolution Imaging ◽  
Magnetic Resonance Imaging Mri ◽  
Uterine Perfusion ◽  
Diagnostic Capabilities

Background The combination of motion-insensitive, high-temporal, and spatial resolution imaging with evaluation of quantitative perfusion has the potential to increase the diagnostic capabilities of magnetic resonance imaging (MRI) in the female pelvis. Purpose To compare a free-breathing compressed-sensing VIBE (fbVIBE) with flexible temporal resolution (range = 4.6–13.8 s) with breath-hold VIBE (bhVIBE) and to evaluate the potential value of quantifying uterine perfusion. Material and Methods A total of 70 datasets from 60 patients (bhVIBE: n = 30; fbVIBE: n = 40) were evaluated by two radiologists. Only temporally resolved reconstruction (fbVIBE) was performed on 30 of the fbVIBE datasets. For a subset (n = 10) of the fbVIBE acquisitions, a time- and motion-resolved reconstruction (mrVIBE) was evaluated. Image quality (IQ), artifacts, diagnostic confidence (DC), and delineation of uterine structures (DoS) were graded on Likert scales (IQ/DC/DoS: 1 (non-diagnostic) to 5 (perfect); artifacts: 1 (no artifacts) to 5 (severe artifacts)). A Tofts model was applied for perfusion analysis. Ktrans was obtained in the myometrium (Mm), junctional zone (Jz), and cervix (Cx). Results The median IQ/DoS/DC scores of fbVIBE (4/5/5 κ >0.7–0.9) and bhVIBE (4/4/4; κ = 0.5–0.7; P > 0.05) were high, but Artifacts were graded low (fbVIBE/bhVIBE: 2/2; κ = 0.6/0.5; P > 0.05). Artifacts were only slightly improved by the additional motion-resolved reconstruction (fbVIBE/mrVIBE: 2/1.5; P = 0.08); fbVIBE was preferred in most cases (7/10). Significant differences of Ktrans values were found between Cx, Jz, and Mm (0.12/0.21/0.19; P < 0.05). Conclusion The fbVIBE sequence allows functional and morphological assessment of the uterus at comparable IQ to bhVIBE.

scholarly journals Free-Breathing 3D Imaging of Right Ventricular Structure and Function Using Respiratory and Cardiac Self-Gated Cine MRI

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Yanchun Zhu ◽  
Jing Liu ◽  
Jonathan Weinsaft ◽  
Pascal Spincemaille ◽  
Thanh D. Nguyen ◽  
...  
Keyword(s):  
Image Quality ◽  
Right Ventricular ◽  
3D Imaging ◽  
Free Breathing ◽  
Cine Mri ◽  
Cine Imaging ◽  
Breath Hold ◽  
Imaging Method ◽  
Long Term Outcome ◽  
And Function

Providing a movie of the beating heart in a single prescribed plane, cine MRI has been widely used in clinical cardiac diagnosis, especially in the left ventricle (LV). Right ventricular (RV) morphology and function are also important for the diagnosis of cardiopulmonary diseases and serve as predictors for the long term outcome. The purpose of this study is to develop a self-gated free-breathing 3D imaging method for RV quantification and to evaluate its performance by comparing it with breath-hold 2D cine imaging in 7 healthy volunteers. Compared with 2D, the 3D RV functional measurements show a reduction of RV end-diastole volume (RVEDV) by 10%, increase of RV end-systole volume (RVESV) by 1.8%, reduction of RV systole volume (RVSV) by 21%, and reduction of RV ejection fraction (RVEF) by 12%. High correlations between the two techniques were found (RVEDV: 0.94; RVESV: 0.85; RVSV: 0.95; and RVEF: 0.89). Compared with 2D, the 3D image quality measurements show a small reduction in blood SNR, myocardium-blood CNR, myocardium contrast, and image sharpness. In conclusion, the proposed self-gated free-breathing 3D cardiac cine imaging technique provides comparable image quality and correlated functional measurements to those acquired with the multiple breath-hold 2D technique in RV.

scholarly journals Right Ventricular Volume and Function Assessment in Congenital Heart Disease Using CMR Compressed-Sensing Real-Time Cine Imaging

2021 ◽  
Vol 10 (9) ◽  
pp. 1930
Author(s):  
Benjamin Longère ◽  
Julien Pagniez ◽  
Augustin Coisne ◽  
Hedi Farah ◽  
Michaela Schmidt ◽  
...  
Keyword(s):  
Congenital Heart Disease ◽  
Compressed Sensing ◽  
Real Time ◽  
Congenital Heart ◽  
Wall Motion ◽  
Cine Imaging ◽  
Breath Hold ◽  
Single Breath ◽  
Single Breath Hold ◽  
Rv Function

Background and objective: To evaluate the reliability of compressed-sensing (CS) real-time single-breath-hold cine imaging for quantification of right ventricular (RV) function and volumes in congenital heart disease (CHD) patients in comparison with the standard multi-breath-hold technique. Methods: Sixty-one consecutive CHD patients (mean age = 22.2 ± 9.0 (SD) years) were prospectively evaluated during either the initial work-up or after repair. For each patient, two series of cine images were acquired: first, the reference segmented multi-breath-hold steady-state free-precession sequence (SSFPref), including a short-axis stack, one four-chamber slice, and one long-axis slice; then, an additional real-time compressed-sensing single-breath-hold sequence (CSrt) providing the same slices. Two radiologists independently assessed the image quality and RV volumes for both techniques, which were compared using the Wilcoxon test and paired Student’s t test, Bland–Altman, and linear regression analyses. The visualization of wall-motion disorders and tricuspid-regurgitation-related signal voids were also analyzed. Results: The mean acquisition time for CSrt was 22.4 ± 6.2 (SD) s (95% CI: 20.8–23.9 s) versus 442.2 ± 89.9 (SD) s (95% CI: 419.2–465.2 s) for SSFPref (p < 0.001). The image quality of CSrt was diagnostic in all examinations and was mostly rated as good (n = 49/61; 80.3%). There was a high correlation between SSFPref and CSrt images regarding RV ejection fraction (49.8 ± 7.8 (SD)% (95% CI: 47.8–51.8%) versus 48.7 ± 8.6 (SD)% (95% CI: 46.5–50.9%), respectively; r = 0.94) and RV end-diastolic volume (192.9 ± 60.1 (SD) mL (95% CI: 177.5–208.3 mL) versus 194.9 ± 62.1 (SD) mL (95% CI: 179.0–210.8 mL), respectively; r = 0.98). In CSrt images, tricuspid-regurgitation and wall-motion disorder visualization was good (area under receiver operating characteristic curve (AUC) = 0.87) and excellent (AUC = 1), respectively. Conclusions: Compressed-sensing real-time cine imaging enables, in one breath hold, an accurate assessment of RV function and volumes in CHD patients in comparison with standard SSFPref, allowing a substantial improvement in time efficiency.

Comparison of breath-hold and free-breathing quantitative pulmonary perfusion MRI

Pneumologie ◽  
2012 ◽  
Vol 66 (06) ◽  
Author(s):  
D Maxien ◽  
M Ingrisch ◽  
F Meinel ◽  
S Thieme ◽  
MF Reiser ◽  
...  
Keyword(s):  
Free Breathing ◽  
Perfusion Mri ◽  
Breath Hold ◽  
Pulmonary Perfusion
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