EurekaMag.com logo
+ Site Statistics
References:
53,517,315
Abstracts:
29,339,501
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Single echo MRI



Single echo MRI



Plos One 9(1): E86008-E86008



Previous nonlinear gradient research has focused on trajectories that reconstruct images with a minimum number of echoes. Here we describe sequences where the nonlinear gradients vary in time to acquire the image in a single readout. The readout is designed to be very smooth so that it can be compressed to minimal time without violating peripheral nerve stimulation limits, yielding an image from a single 4 ms echo. This sequence was inspired by considering the code of each voxel, i.e. the phase accumulation that a voxel follows through the readout, an approach connected to traditional encoding theory. We present simulations for the initial sequence, a low slew rate analog, and higher resolution reconstructions. Extremely fast acquisitions are achievable, though as one would expect, SNR is reduced relative to the slower Cartesian sampling schemes because of the high gradient strengths. The prospect that nonlinear gradients can acquire images in a single <10 ms echo makes this a novel and interesting approach to image encoding.

(PDF same-day service: $19.90)

Accession: 055793846

Download citation: RISBibTeXText

PMID: 24465837

DOI: 10.1371/journal.pone.0086008



Related references

Comparison of multi-echo and single-echo gradient-recalled echo sequences for SPIO-enhanced liver MRI at 3 T. Clinical Radiology 65(11): 916-923, 2010

Comparison of conventional single echo and multi-echo sequences with a fast spin-echo sequence for quantitative T2 mapping: application to the prostate. Journal of Magnetic Resonance Imaging 6(4): 603-607, 1996

Stomach diseases: MR evaluation using combined t2-weighted single-shot echo train spin-echo and gadolinium-enhanced spoiled gradient-echo sequences. Journal of Magnetic Resonance Imaging 10(6): 950-960, 1999

Colon diseases: MR evaluation using combined T2-weighted single-shot echo train spin-echo and gadolinium-enhanced spoiled gradient-echo sequences. Journal of Magnetic Resonance Imaging 12(2): 297-305, 2000

Mean diffusivity, fractional anisotropy maps, and three-dimensional white-matter tractography by diffusion tensor imaging. Comparison between single-shot fast spin-echo and single-shot echo-planar sequences at 1.5 Tesla. European Radiology 18(4): 830-834, 2007

Single-shot echo-planar imaging with Nyquist ghost compensation: interleaved dual echo with acceleration (IDEA) echo-planar imaging (EPI). Magnetic Resonance in Medicine 69(1): 37-47, 2013

MRI of the lung: value of different turbo spin-echo, single-shot turbo spin-echo, and 3D gradient-echo pulse sequences for the detection of pulmonary metastases. Journal of Magnetic Resonance Imaging 25(1): 73-81, 2006

Single breath-hold T2-weighted MR imaging of the liver: value of single-shot fast spin-echo and multishot spin-echo echoplanar imaging. Ajr. American Journal of Roentgenology 174(5): 1423-1431, 2000

Can a single-shot black-blood T2-weighted spin-echo echo-planar imaging sequence with sensitivity encoding replace the respiratory-triggered turbo spin-echo sequence for the liver? An optimization and feasibility study. Journal of Magnetic Resonance Imaging 21(3): 219-229, 2005

Acquisition of spin echo and stimulated echo by a single sequence: application to MRI of diffusion. Magnetic Resonance Imaging 12(4): 605-611, 1994

Ultrafast bold fMRI using single-shot spin-echo echo planar imaging. Journal of Medical Physics 34(1): 37-42, 2010

Single-shot echo-planar imaging of multiple sclerosis: effects of varying echo time. Neuroradiology 41(3): 163-166, 1999

YFR-90 shallow water digital echo-integrator with single-chip microcomputer preprocessing echo-signle. Marine Fisheries Research (Shandong). Nov; 14: 55-63, 1993

Can a brief, single-view screening echo detect significant echo findings? Implications regarding telemedicine evaluation. Circulation 98(17 SUPPL ): I844, Oct 27, 1998

Simultaneous acquisition of gradient-echo and asymmetric spin-echo for single-shot z-shim: Z-SAGA. Magnetic Resonance in Medicine 51(1): 212-216, 2004