𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Reduction of artifacts in T2-weighted PROPELLER in high-field preclinical imaging

✍ Scribed by Prachi Pandit; Yi Qi; Kevin F. King; G. Allan Johnson

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
542 KB
Volume
65
Category
Article
ISSN
0740-3194

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A simple technique is implemented for correction of artifacts arising from nonuniform T~2~‐weighting of k‐space data in fast spin echo–based PROPELLER (periodically rotated overlapping parallel lines with enhanced reconstruction). An additional blade with no phase‐encoding gradients is acquired to generate the scaling factor used for the correction. Results from simulations and phantom experiments, as well as in vivo experiments in free‐breathing mice, demonstrate the advantages of the proposed method. This technique is developed specifically for high‐field imaging applications where T~2~ decay is rapid. Magn Reson Med, 2011. © 2010 Wiley‐Liss, Inc.

📜 SIMILAR VOLUMES

Removal of local field gradient artifact
Removal of local field gradient artifacts in T2*-weighted images at high fields by gradient-echo slice excitation profile imaging
✍ Qing X. Yang; Gerald D. Williams; Roger J. Demeure; Timothy J. Mosher; Michael B 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 891 KB

## Abstract Development of high magnetic field MRI techniques is hampered by the significant artifacts produced by B~0~ field inhomogeneities in the excited slices. A technique, gradient‐echo slice excitation profile imaging (__GESEPI__), is presented for recovering the signal lost caused by intrav

Sensitivity enhancement and reduction of
Sensitivity enhancement and reduction of Gibbs artifact in T2- weighted imaging using variable tip angle excitation
✍ A. G. Webb; R. B. Clarkson 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 257 KB

## Abstract Introduction of a Gaussian weighting function into the phase encoding of the spin‐echo imaging method via variable tip angle excitation, with concomitant optimization of the recycle delay, is shown to increase the sensitivity of __T__~2~‐weighted imaging by up to 40%. In addition, the G

Motion artifact in T2-weighted fast spin
Motion artifact in T2-weighted fast spin-echo images of the liver: Effect on image contrast and reduction of artifact using respiratory triggering in normal volunteers
✍ Kyuran A. Choe; Robert C. Smith; Ken Wilkens; R. Todd Constable 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 981 KB

## Abstract The purpose of our study was to evaluate the effect of respiratory motion on the image contrast of T2‐weighted fast spin‐echo (FSE) images of the liver as well as the reduction of motion artifact using respiratory triggering of the data acquisition. We imaged the livers of 10 healthy vo

Chemical-shift artifact reduction in had
Chemical-shift artifact reduction in hadamard-encoded MR spectroscopic imaging at high (3T and 7T) magnetic fields
✍ Gadi Goelman; Songtao Liu; Roman Fleysher; Lazar Fleysher; Robert I. Grossman; O 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 367 KB

## Abstract Proton MR spectroscopic imaging (MRSI) at higher magnetic fields (__B__~0~) suffers metabolite localization errors from different chemical‐shift displacements (CSDs) if spatially‐selective excitation is used. This phenomenon is exacerbated by the decreasing radiofrequency (RF) field str

Reduction of magnetic field inhomogeneit
Reduction of magnetic field inhomogeneity artifacts in echo planar imaging with SENSE and GESEPI at high field
✍ Qing X. Yang; Jianli Wang; Michael B. Smith; Mark Meadowcroft; Xiaoyu Sun; Paul 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 533 KB

## Abstract Geometric distortion, signal‐loss, and image‐blurring artifacts in echo planar imaging (EPI) are caused by frequency shifts and __T__ relaxation distortion of the MR signal along the __k__‐space trajectory due to magnetic field inhomogeneities. The EPI geometric‐distortion artifact asso

Correlation between high-field t2- weigh
Correlation between high-field t2- weighted MR imaging and histology of ischemic lesions in gerbil brain
✍ Paui D. Hockings; Stephen E. Rose; Stuart Crozier; Wolfgang Roffman; David M. Do 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 688 KB

## Abstract Global forebrain ischemia in the Mongolian gerbil is a common animal model for use in stroke research. We produced lesions of graded severity in gerbil brains (after prescreening by MR imaging) by performing 6 minute bilateral carotid artery occlusions while monitoring pericranial tempe