Wanzhan Liu
Overview
Explore the profile of Wanzhan Liu including associated specialties, affiliations and a list of published articles.
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10
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275
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Recent Articles
1.
Liu W, Zhang S, Collins C, Wang J, Smith M
Concepts Magn Reson Part B Magn Reson Eng
. 2012 Jun;
29B(4):176-184.
PMID: 22661912
Four 12-rung linear birdcage-type coils were built to experimentally examine the effects of the end-ring/shield configuration on radiofrequency magnetic field (B(1)) homogeneity and SNR at 125 MHz. The coil configurations...
2.
Liu W, Kao C, Collins C, Smith M, Yang Q
Magn Reson Med
. 2012 Apr;
69(1):290-4.
PMID: 22473620
In numerical analyses of radiofrequency (RF) fields for MRI, RF power is often permitted to radiate out of the problem region. In reality, RF power will be confined by the...
3.
Wang Z, Lin J, Mao W, Liu W, Smith M, Collins C
J Magn Reson Imaging
. 2007 Jul;
26(2):437-41.
PMID: 17654736
Purpose: To present and discuss numerical calculations of the specific absorption rate (SAR) and temperature in comparison to regulatory limits. While it is possible to monitor whole-body or whole-head average...
4.
Meadowcroft M, Zhang S, Liu W, Park B, Connor J, Collins C, et al.
Magn Reson Med
. 2007 Apr;
57(5):835-41.
PMID: 17457873
Direct imaging of a histological slice is challenging. The vast difference in dimension between planar size and the thickness of histology slices would require an RF coil to produce a...
5.
Collins C, Wang Z, Mao W, Fang J, Liu W, Smith M
Magn Reson Med
. 2007 Feb;
57(3):470-4.
PMID: 17326169
A number of methods to improve excitation homogeneity in high-field MRI have been proposed, and some of these methods rely on separate control of radiofrequency (RF) coils in a transmit...
6.
Collins C, Liu W, Swift B, Smith M
Magn Reson Med
. 2005 Nov;
54(6):1327-32.
PMID: 16270331
Image inhomogeneity related to high radiofrequencies is one of the major challenges for high field imaging. This inhomogeneity can be thought of as having 2 radiofrequency-field related contributors: the transmit...
7.
Central brightening due to constructive interference with, without, and despite dielectric resonance
Collins C, Liu W, Schreiber W, Yang Q, Smith M
J Magn Reson Imaging
. 2005 Jan;
21(2):192-6.
PMID: 15666397
Purpose: To aid in discussion about the mechanism for central brightening in high field magnetic resonance imaging (MRI), especially regarding the appropriateness of using the term dielectric resonance to describe...
8.
Collins C, Liu W, Wang J, Gruetter R, Thomas Vaughan J, Ugurbil K, et al.
J Magn Reson Imaging
. 2004 Apr;
19(5):650-6.
PMID: 15112317
Purpose: To examine relationships between specific energy absorption rate (SAR) and temperature distributions in the human head during radio frequency energy deposition in MRI. Materials And Methods: A multi-tissue numerical...
9.
Liu W, Collins C, Delp P, Smith M
Magn Reson Med
. 2004 Jan;
51(1):217-21.
PMID: 14705065
We modeled four different end-ring/shield configurations of a birdcage coil to examine their effects on field homogeneity and signal-to-noise ratio (SNR) at 64 MHz and 125 MHz. The configurations are...
10.
Alecci M, Collins C, Wilson J, Liu W, Smith M, Jezzard P
Magn Reson Med
. 2003 Jan;
49(2):363-70.
PMID: 12541257
The use of detached endcaps for 3 T birdcage coils was investigated both theoretically and experimentally. Finite difference time domain analysis, along with workbench and MRI techniques, were used to...