Abstract
A technique suitable for diffusion tensor imaging (DTI) at high field strengths is presented in this work. The method is based on a periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) k-space trajectory using EPI as the signal readout module, and hence is dubbed PROPELLER EPI. The implementation of PROPELLER EPI included a series of correction schemes to reduce possible errors associated with the intrinsically higher sensitivity of EPI to off-resonance effects. Experimental results on a 3.0 Tesla MR system showed that the PROPELLER EPI images exhibit substantially reduced geometric distortions compared with single-shot EPI, at a much lower RF specific absorption rate (SAR) than the original version of the PROPELLER fast spin-echo (FSE) technique. For DTI, the self-navigated phase-correction capability of the PROPELLER EPI sequence was shown to be effective for in vivo imaging. A higher signal-to-noise ratio (SMR) compared to single-shot EPI at an identical total scan time was achieved, which is advantageous for routine DTI applications in clinical practice.
| Original language | English |
|---|---|
| Pages (from-to) | 1232-1240 |
| Number of pages | 9 |
| Journal | Magnetic Resonance in Medicine |
| Volume | 54 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - Nov 2005 |
| Externally published | Yes |
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Keywords
- Diffusion tensor imaging
- EPI
- Geometric distortions
- PROPELLER imaging
- Specific absorption rate
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging
- Radiological and Ultrasound Technology
Cite this
PROPELLER EPI : An MRI technique suitable for diffusion tensor imaging at high field strength with reduced geometric distortions. / Wang, Fu Nien; Huang, Teng Yi; Lin, Fa Hsuan; Chuang, Tzu Chao; Chen, Nan Kuei; Chung, Hsiao Wen; Chen, Cheng Yu; Kwong, Kenneth K.
In: Magnetic Resonance in Medicine, Vol. 54, No. 5, 11.2005, p. 1232-1240.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - PROPELLER EPI
T2 - An MRI technique suitable for diffusion tensor imaging at high field strength with reduced geometric distortions
AU - Wang, Fu Nien
AU - Huang, Teng Yi
AU - Lin, Fa Hsuan
AU - Chuang, Tzu Chao
AU - Chen, Nan Kuei
AU - Chung, Hsiao Wen
AU - Chen, Cheng Yu
AU - Kwong, Kenneth K.
PY - 2005/11
Y1 - 2005/11
N2 - A technique suitable for diffusion tensor imaging (DTI) at high field strengths is presented in this work. The method is based on a periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) k-space trajectory using EPI as the signal readout module, and hence is dubbed PROPELLER EPI. The implementation of PROPELLER EPI included a series of correction schemes to reduce possible errors associated with the intrinsically higher sensitivity of EPI to off-resonance effects. Experimental results on a 3.0 Tesla MR system showed that the PROPELLER EPI images exhibit substantially reduced geometric distortions compared with single-shot EPI, at a much lower RF specific absorption rate (SAR) than the original version of the PROPELLER fast spin-echo (FSE) technique. For DTI, the self-navigated phase-correction capability of the PROPELLER EPI sequence was shown to be effective for in vivo imaging. A higher signal-to-noise ratio (SMR) compared to single-shot EPI at an identical total scan time was achieved, which is advantageous for routine DTI applications in clinical practice.
AB - A technique suitable for diffusion tensor imaging (DTI) at high field strengths is presented in this work. The method is based on a periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) k-space trajectory using EPI as the signal readout module, and hence is dubbed PROPELLER EPI. The implementation of PROPELLER EPI included a series of correction schemes to reduce possible errors associated with the intrinsically higher sensitivity of EPI to off-resonance effects. Experimental results on a 3.0 Tesla MR system showed that the PROPELLER EPI images exhibit substantially reduced geometric distortions compared with single-shot EPI, at a much lower RF specific absorption rate (SAR) than the original version of the PROPELLER fast spin-echo (FSE) technique. For DTI, the self-navigated phase-correction capability of the PROPELLER EPI sequence was shown to be effective for in vivo imaging. A higher signal-to-noise ratio (SMR) compared to single-shot EPI at an identical total scan time was achieved, which is advantageous for routine DTI applications in clinical practice.
KW - Diffusion tensor imaging
KW - EPI
KW - Geometric distortions
KW - PROPELLER imaging
KW - Specific absorption rate
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UR - http://www.scopus.com/inward/citedby.url?scp=27644579499&partnerID=8YFLogxK
U2 - 10.1002/mrm.20677
DO - 10.1002/mrm.20677
M3 - Article
VL - 54
SP - 1232
EP - 1240
JO - Magnetic Resonance in Medicine
JF - Magnetic Resonance in Medicine
SN - 0740-3194
IS - 5
ER -