Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Patrick J. Ledden"'
Publikováno v:
Magnetic Resonance in Medicine. 52:131-140
A variety of continuous and pulsed arterial spin labeling (ASL) perfusion MRI techniques have been demonstrated in recent years. One of the reasons these methods are still not routinely used is the limited extent of the imaging region. Of the ASL met
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94bad2535a32f96c826049585022e82d
https://doi.org/10.1002/mrm.20124
https://doi.org/10.1002/mrm.20124
Autor:
Renxin Chu, Jacco A. de Zwart, Patrick J. Ledden, Peter van Gelderen, Jerzy Bodurka, Jeff H. Duyn
Publikováno v:
Magnetic Resonance in Medicine. 51:22-26
The performance of a 16-channel receive-only RF coil for brain imaging at 3.0 Tesla was investigated using a custom-built 16-channel receiver. Both the image signal-to-noise ratio (SNR) and the noise amplification (g-factor) in sensitivity-encoding (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce9ab29e757b597de524b3cfbd3fa88b
https://doi.org/10.1002/mrm.10678
https://doi.org/10.1002/mrm.10678
Publikováno v:
Concepts in Magnetic Resonance. 15:92-100
In this work, we demonstrate and characterize a large-volume radiofrequency (RF) coil insert used to perform human torso magnetic resonance imaging at 3 T. The coil is a transmission line resonator of elliptic cross-section that can be actively detun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce63fb8e559ae512d55f5add5a15ee88
https://doi.org/10.1002/cmr.10014
https://doi.org/10.1002/cmr.10014
Autor:
Lawrence L. Wald, Timothy G. Reese, Greg Zaharchuk, Patrick J. Ledden, Bruce R. Rosen, Kenneth K. Kwong
Publikováno v:
Magnetic Resonance in Medicine. 41:1093-1098
An arterial spin labeling technique using separate RF labeling and imaging coils was used to obtain multislice perfusion images of the human brain at 3 T. Continuous RF irradiation at a peak power of 0.3 W was applied to the carotid arteries to adiab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eff18b79c8fc55b78953780738b1fa02
https://doi.org/10.1002/(sici)1522-2594(199906)41:6<1093::aid-mrm4>3.0.co
https://doi.org/10.1002/(sici)1522-2594(199906)41:6<1093::aid-mrm4>3.0.co
Autor:
Christopher J. Schmidt, Kenneth K. Kwong, Thomas J. Brady, Brigitte P. Poncelet, Patrick J. Ledden, Todd M. Koelling, Howard L. Kantor, Robert M. Weisskoff, Timothy G. Reese
Publikováno v:
Magnetic Resonance in Medicine. 41:510-519
This paper presents a flow-sensitive alternating inversion recovery (FAIR) method for measuring human myocardial perfusion at 1.5 T. Slice-selective/non-selective IR images were collected using a double-gated IR echoplanar imaging sequence. Myocardia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f48bb579ad08e23fa33bb844e0678f3
https://doi.org/10.1002/(sici)1522-2594(199903)41:3<510::aid-mrm13>3.0.co
https://doi.org/10.1002/(sici)1522-2594(199903)41:3<510::aid-mrm13>3.0.co
Publikováno v:
Hum Brain Mapp
A clustered volume acquisition functional MRI pulse sequence was modified to assess the response to the acoustic noise of echo‐planar imaging in the auditory cortex and to determine whether it is possible to obtain data which is relatively free of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::def20216f108a37b18ca3fdc552e1aab
https://doi.org/10.1002/(sici)1097-0193(1999)7:2<79::aid-hbm1>3.0.co
https://doi.org/10.1002/(sici)1097-0193(1999)7:2<79::aid-hbm1>3.0.co
Publikováno v:
Hum Brain Mapp
The effects of the noise of echo‐planar functional magnetic resonance imaging on auditory cortex responses were compared for two methods of acquiring functional MR data. Responses observed with a distributed volume acquisition sequence were compare
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab8f836ba12892f7aa885ca0c6e5ed5b
https://doi.org/10.1002/(sici)1097-0193(1999)7:2<89::aid-hbm2>3.0.co
https://doi.org/10.1002/(sici)1097-0193(1999)7:2<89::aid-hbm2>3.0.co
Autor:
Lawrence L. Wald, Yin-Ching Iris Chen, Eekkehard H. G. K. Küestermann, Bruce G. Jenkins, John R. Keltner, John R. Baker, Richard T. Matthews, Bruce R. Rosen, Patrick J. Ledden
Publikováno v:
Magnetic Resonance in Medicine. 39:651-656
A double-quantum filter (DQF) sequence with PRESS localization was developed for in vivo detection of the glucose resonances in the 3.85-ppm region of the brain proton spectrum. The efficiency and spectral editing characteristics were studied in phan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dcef69e20875d711869a0b933f037c01
https://doi.org/10.1002/mrm.1910390420
https://doi.org/10.1002/mrm.1910390420
Autor:
John R. Baker, A.R. Guimaraes, Nelson Y. S. Kiang, Thomas M. Talavage, Patrick J. Ledden, Barbara C. Fullerton, Bruce R. Rosen, Jennifer R. Melcher, Robert M. Weisskoff
Publikováno v:
Human Brain Mapping. 6:33-41
There is a lack of physiological data pertaining to how listening humans process auditory information. Functional magnetic resonance imaging (fMRI) has provided some data for the auditory cortex in awake humans, but there is still a paucity of compar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2564918146498b2eff7c9f420b1433ee
https://doi.org/10.1002/(sici)1097-0193(1998)6:1<33::aid-hbm3>3.0.co
https://doi.org/10.1002/(sici)1097-0193(1998)6:1<33::aid-hbm3>3.0.co
Autor:
Patrick J. Ledden
Publikováno v:
Journal of Modern Literature. 22:329-336
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1e2ac6bafec78cb8670c91ee0da7896
https://doi.org/10.1353/jml.1999.0037
https://doi.org/10.1353/jml.1999.0037