scholarly journals Interleaved echo-planar imaging for fast multiplanar magnetic resonance temperature imaging of ultrasound thermal ablation therapy

2004 ◽  
Vol 20 (4) ◽  
pp. 706-714 ◽  
Author(s):  
R. Jason Stafford ◽  
Roger E. Price DVM ◽  
Chris J. Diederich ◽  
Marko Kangasniemi ◽  
Lars E. Olsson ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Thermal Ablation ◽  
Echo Planar Imaging ◽  
Planar Imaging ◽  
Temperature Imaging ◽  
Ablation Therapy ◽  
Thermal Ablation Therapy ◽  
Magnetic Resonance Temperature Imaging ◽  
Echo Planar

scholarly journals Magnetic Resonance Fingerprinting with Combined Gradient- and Spin-echo Echo-planar Imaging: Simultaneous Estimation of T1, T2 and T2* with integrated-B1 Correction

2019 ◽  
Author(s):  
Mahdi Khajehim ◽  
Thomas Christen ◽  
J. Jean Chen
Keyword(s):  
Magnetic Resonance ◽  
Spin Echo ◽  
Echo Planar Imaging ◽  
Simultaneous Estimation ◽  
Single Shot ◽  
Planar Imaging ◽  
Reconstruction Process ◽  
Data Segment ◽  
T1 And T2 ◽  
Echo Planar

AbstractPurposeTo introduce a novel magnetic-resonance fingerprinting (MRF) framework with single-shot echo-planar imaging (EPI) readout to simultaneously estimate tissue T2, T1 and T2*, and integrate B1 correction.MethodsSpin-echo EPI is combined with gradient-echo EPI to achieve T2 estimation as well as T1 and T2* quantification. In the dictionary matching step, the GE-EPI data segment provides estimates of tissue T1 and T2* with additional B1 information, which are then incorporated into the T2-matching step that uses the SE-EPI data segment. In this way, biases in T2 and T2* estimates do not affect each other.ResultsAn excellent correspondence was found between our T1, T2, and T2* estimates and results obtained from standard approaches in both phantom and human scans. In the phantom scan, a linear relationship with R2>0.96 was found for all parameter estimates. The maximum error in the T2 estimate was found to be below 6%. In the in-vivo scan, similar contrast was noted between MRF and standard approaches, and values found in a small region of interest (ROI) located in the grey matter (GM) were in line with previous measurements (T2MRF=88±7ms vs T2Ref=89±11ms, T1MRF=1153±154ms vs T1Ref=1122±52ms, T2*MRF=56±4ms vs T2*Ref=53±3ms).ConclusionAdding a spin echo data segment to EPI based MRF allows accurate and robust measurements of T2, T1 and T2* relaxation times. This MRF framework is easier to implement than spiral-based MRF. It doesn’t suffer from undersampling artifacts and seems to require a smaller dictionary size that can fasten the reconstruction process.

Magnetic resonance fingerprinting using echo-planar imaging: Joint quantification of T1 and T2∗ relaxation times

2016 ◽  
Vol 78 (5) ◽  
pp. 1724-1733 ◽  
Author(s):  
Benedikt Rieger ◽  
Fabian Zimmer ◽  
Jascha Zapp ◽  
Sebastian Weingärtner ◽  
Lothar R. Schad
Keyword(s):  
Magnetic Resonance ◽  
Relaxation Times ◽  
Echo Planar Imaging ◽  
Planar Imaging ◽  
T2 Relaxation ◽  
T1 And T2 ◽  
Echo Planar

Accelerated magnetic resonance diffusion tensor imaging of the median nerve using simultaneous multi-slice echo planar imaging with blipped CAIPIRINHA

2015 ◽  
Vol 26 (6) ◽  
pp. 1921-1928 ◽  
Author(s):  
Lukas Filli ◽  
Marco Piccirelli ◽  
David Kenkel ◽  
Andreas Boss ◽  
Andrei Manoliu ◽  
...  
Keyword(s):  
Diffusion Tensor Imaging ◽  
Magnetic Resonance ◽  
Median Nerve ◽  
Diffusion Tensor ◽  
Echo Planar Imaging ◽  
Planar Imaging ◽  
Echo Planar

Ultrafast magnetic resonance scanning of the liver with echo-planar imaging

1990 ◽  
Vol 63 (750) ◽  
pp. 430-437 ◽  
Author(s):  
M. K. Stehling ◽  
R. M. Charnley ◽  
A. M. Blamire ◽  
R. J. Ordidge ◽  
R. Coxon ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Echo Planar Imaging ◽  
Planar Imaging ◽  
Magnetic Resonance Scanning ◽  
Echo Planar
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