scholarly journals Automatic correction of echo-planar imaging (EPI) ghosting artifacts in real-time interactive cardiac MRI using sensitivity encoding

2008 ◽  
Vol 27 (1) ◽  
pp. 239-245 ◽  
Author(s):  
Yoon-Chul Kim ◽  
Jon-Fredrik Nielsen ◽  
Krishna S. Nayak
Keyword(s):  
Real Time ◽  
Cardiac Mri ◽  
Echo Planar Imaging ◽  
Automatic Correction ◽  
Planar Imaging ◽  
Sensitivity Encoding ◽  
Ghosting Artifacts ◽  
Echo Planar

The clinical potential of ultra-high-speed echo-planar imaging

1990 ◽  
Vol 333 (1632) ◽  
pp. 507-514 ◽  
Keyword(s):  
Real Time ◽  
High Speed ◽  
Echo Planar Imaging ◽  
Lesion Detection ◽  
Whole Body ◽  
Planar Imaging ◽  
Cardiac Events ◽  
Ultra High Speed ◽  
Movement Artefact ◽  
Echo Planar

Ultra-high-speed echo-planar imaging (EP1) allows acquisition of a complete twodimensional image in 64 to 128 ms devoid of movement artefact and without sacrifice of contrast due to relaxation time effects. In conventional whole-body MRI, however, obtrusive movement artefact and extended imaging time, resulting from the need to apply multiple sequences to facilitate lesion detection and pathological characterization, remain limitations. Reduced total examination time increases patient tolerance and throughput • furthermore optimization of contrast to achieve maximal conspicuity of particular features in liver or brain pathology is achieved simply and interactively by real time adjustment of the imaging parameters. The method provides the opportunity to study in real time dynamic events such as flow phenomena in the vascular and cerebrospinal fluid compartments of the brain as well as the kinetics of administered contrast agents, EPI is the only means of capturing the irregular motion of aperiodic cardiac events and bowel peristalsis.

Real-time flow measurements using echo-planar imaging

1991 ◽  
Vol 18 (1) ◽  
pp. 1-8 ◽  
Author(s):  
D. N. Guilfoyle ◽  
P. Gibbs ◽  
R. J. Ordidge ◽  
P. Manwield
Keyword(s):  
Real Time ◽  
Echo Planar Imaging ◽  
Planar Imaging ◽  
Flow Measurements ◽  
Time Flow ◽  
Echo Planar

scholarly journals Improving the image quality of DWI in breast cancer: comparison of multi-shot DWI using multiplexed sensitivity encoding to conventional single-shot echo-planar imaging DWI

2020 ◽  
pp. 20200427
Author(s):  
Gabrielle C Baxter ◽  
Andrew J Patterson ◽  
Ramona Woitek ◽  
Iris Allajbeu ◽  
Martin J Graves ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Image Quality ◽  
Coefficient Of Variation ◽  
Echo Planar Imaging ◽  
Single Shot ◽  
Planar Imaging ◽  
Benign Lesions ◽  
Sensitivity Encoding ◽  
Echo Planar

Objective: To compare diffusion-weighted images (DWI) acquired using single-shot echo-planar imaging (ss-EPI) and multiplexed sensitivity encoding (MUSE) in breast cancer. Methods 20 females with pathologically confirmed breast cancer (age 51 ± 12 years) were imaged with ss-EPI-DWI and MUSE-DWI. ADC, normalised ADC (nADC), blur and distortion metrics and qualitative image quality scores were compared. The Crété-Roffet and Mattes mutual information metrics were used to evaluate blurring and distortion, respectively. In a breast phantom, six permutations of MUSE-DWI with varying parallel acceleration factor and number of shots were compared. Differences in ADC and nADC were compared using the coefficient of variation in the phantom and a paired t-test in patients. Differences in blur, distortion and qualitative metrics were analysed using a Wilcoxon signed-rank test. Results: There was a low coefficient of variation (<2%) in ADC between ss-EPI-DWI and all MUSE-DWI permutations acquired using the phantom. 22 malignant and three benign lesions were identified in 20 patients. ADC values measured using MUSE were significantly lower compared to ss-EPI for malignant but not benign lesions (p < 0.001, p = 0.21). nADC values were not significantly different (p = 0.62, p = 0.28). Blurring and distortion improved with number of shots and acceleration factor, and significantly improved with MUSE in patients (p < 0.001, p = 0.002). Qualitatively, image quality improved using MUSE. Conclusion: MUSE improves the image quality of breast DWI compared to ss-EPI. Advances in knowledge: MUSE-DWI has superior image quality and reduced blurring and distortion compared to ss-EPI-DWI in breast cancer.

scholarly journals Comparison of Real-Time Water Proton Spectroscopy and Echo-Planar Imaging Sensitivity to the BOLD Effect at 3 T and at 7 T

PLoS ONE ◽  
2014 ◽  
Vol 9 (3) ◽  
pp. e91620 ◽  
Author(s):  
Yury Koush ◽  
Mark A. Elliott ◽  
Frank Scharnowski ◽  
Klaus Mathiak
Keyword(s):  
Real Time ◽  
Echo Planar Imaging ◽  
Water Proton ◽  
Planar Imaging ◽  
Proton Spectroscopy ◽  
Bold Effect ◽  
Echo Planar

scholarly journals Real-time geometric distortion correction for interventional imaging with echo-planar imaging (EPI)

2009 ◽  
Vol 61 (4) ◽  
pp. 994-1000 ◽  
Author(s):  
Iulius Dragonu ◽  
Baudouin Denis de Senneville ◽  
Bruno Quesson ◽  
Chrit Moonen ◽  
Mario Ries
Keyword(s):  
Real Time ◽  
Echo Planar Imaging ◽  
Distortion Correction ◽  
Geometric Distortion ◽  
Planar Imaging ◽  
Interventional Imaging ◽  
Echo Planar

Improved diffusion-weighted single-shot echo-planar imaging (EPI) in stroke using sensitivity encoding (SENSE)

2001 ◽  
Vol 46 (3) ◽  
pp. 548-554 ◽  
Author(s):  
Roland Bammer ◽  
Stephen L. Keeling ◽  
Michael Augustin ◽  
Klaas P. Pruessmann ◽  
Roswitha Wolf ◽  
...  
Keyword(s):  
Echo Planar Imaging ◽  
Single Shot ◽  
Planar Imaging ◽  
Sensitivity Encoding ◽  
Diffusion Weighted ◽  
Echo Planar
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