PMID- 22006586
OWN - NLM
STAT- MEDLINE
DCOM- 20120919
LR  - 20150525
IS  - 1522-2594 (Electronic)
IS  - 0740-3194 (Linking)
VI  - 67
IP  - 6
DP  - 2012 Jun
TI  - Spectroscopic imaging using concentrically circular echo-planar trajectories in 
      vivo.
PG  - 1515-22
LID - 10.1002/mrm.23184 [doi]
AB  - An alternative to the standard echo-planar spectroscopic imaging technique is 
      presented, spectroscopic imaging using concentrically circular echo-planar 
      trajectories (SI-CONCEPT). In contrast to the conventional chemical shift imaging 
      data, the sampled data from each set of concentric rings were regridded into 
      Cartesian space. Usage of concentric k-space trajectories has the advantage of 
      requiring significantly reduced slew rates than echo-planar spectroscopic 
      imaging, allowing for the collection of higher spectral bandwidths and opening 
      the door for high-bandwidth echo-planar styled spectroscopic imaging at higher 
      magnetic fields. Before two-dimensional spatial and one-dimensional spectral 
      encoding, the volume of interest was localized using the standard point-resolved 
      spectroscopy sequence. The feasibility of using concentric k-space trajectories 
      is demonstrated, and the spatial profiles and representative spectra are compared 
      with the standard echo-planar spectroscopic imaging technique in a gray matter 
      phantom containing metabolites at physiological concentrations and healthy human 
      brain in vivo. The symmetric nature of the concentric circles also reduces the 
      number of required excitations for a given resolution by a factor of two. 
      Possible artifacts and limitations are discussed.
CI  - Copyright (c) 2011 Wiley Periodicals, Inc.
FAU - Furuyama, Jon K
AU  - Furuyama JK
AD  - Department of Radiological Sciences, University of California, Los Angeles, 
      California 90095, USA.
FAU - Wilson, Neil E
AU  - Wilson NE
FAU - Thomas, M Albert
AU  - Thomas MA
LA  - eng
PT  - Journal Article
DEP - 20111017
PL  - United States
TA  - Magn Reson Med
JT  - Magnetic resonance in medicine
JID - 8505245
SB  - IM
MH  - Adult
MH  - *Algorithms
MH  - Brain/*anatomy & histology/*metabolism
MH  - Echo-Planar Imaging/instrumentation/*methods
MH  - Humans
MH  - Image Enhancement/methods
MH  - Image Interpretation, Computer-Assisted/*methods
MH  - Magnetic Resonance Spectroscopy/*methods
MH  - Male
MH  - Phantoms, Imaging
MH  - Reproducibility of Results
MH  - Sensitivity and Specificity
EDAT- 2011/10/19 06:00
MHDA- 2012/09/20 06:00
CRDT- 2011/10/19 06:00
PHST- 2011/04/18 00:00 [received]
PHST- 2011/07/05 00:00 [revised]
PHST- 2011/08/01 00:00 [accepted]
PHST- 2011/10/19 06:00 [entrez]
PHST- 2011/10/19 06:00 [pubmed]
PHST- 2012/09/20 06:00 [medline]
AID - 10.1002/mrm.23184 [doi]
PST - ppublish
SO  - Magn Reson Med. 2012 Jun;67(6):1515-22. doi: 10.1002/mrm.23184. Epub 2011 Oct 17.