Výsledky vyhledávání - "James R. Brookeman"

Regional anisotropy of airspace orientation in the lung as assessed with hyperpolarized helium-3 diffusion MRI

Autor: Peter Komlosi, William A. Tobias, Karen Mooney, Gordon D. Cates, Eduard E. de Lange, John P. Mugler, G. Wilson Miller, Jaime F. Mata, Talissa A. Altes, James R. Brookeman, Kun Qing

Publikováno v: Journal of Magnetic Resonance Imaging. 42:1777-1782

Purpose To evaluate regional anisotropy of lung-airspace orientation by assessing the dependence of helium-3 (3He) apparent diffusion coefficient (ADC) values on the direction of diffusion sensitization at two field strengths. Materials and Methods H

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7b01e476f4aabafdb93101925819d82e
https://doi.org/10.1002/jmri.24950

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Rapid acquisition of helium-3 and proton three-dimensional image sets of the human lung in a single breath-hold using compressed sensing

Autor: William A. Tobias, G. Wilson Miller, James R. Brookeman, John P. Mugler, Xiao Chen, Jaime F. Mata, Eduard E. de Lange, Xue Feng, Kun Qing, Talissa A. Altes, Gordon D. Cates, Nicholas J. Tustison

Publikováno v: Magnetic Resonance in Medicine. 74:1110-1115

Purpose To develop and validate a method for acquiring helium-3 (3He) and proton (1H) three-dimensional (3D) image sets of the human lung with isotropic spatial resolution within a 10-s breath-hold by using compressed sensing (CS) acceleration, and t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::076ed3ff4d1dc4f55e0d0d7346b44773
https://doi.org/10.1002/mrm.25499

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Characterization and Detection of Physiologic Lung Changes Before and After Placement of Bronchial Valves Using Hyperpolarized Helium-3 MR Imaging

Autor: Jonathon D. Truwit, James R. Brookeman, Peter Sylvester, Ajeet Vinayak, John P. Mugler, Yun Shim, Talissa A. Altes, Eduard E. de Lange, Jaime F. Mata

Publikováno v: Academic Radiology. 18:1195-1199

Rationale and Objectives The aim of this study was to determine the efficacy of hyperpolarized 3He (HHe) ventilation and apparent diffusion coefficient (ADC) HHe magnetic resonance imaging (MRI) in detecting changes in lung function and microstructur

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ea991336090867eec98b03716c3a47aa
https://doi.org/10.1016/j.acra.2011.03.002

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A short-breath-hold technique for lung p O2 mapping with 3 He MRI

Autor: Jing Cai, Gordon D. Cates, G. Wilson Miller, James R. Brookeman, John P. Mugler, William A. Tobias, Talissa A. Altes, Jaime F. Mata, Eduard E. de Lange

Publikováno v: Magnetic Resonance in Medicine. 63:127-136

A pulse-sequence strategy was developed for generating regional maps of alveolar oxygen partial pressure (pO2) in a single 6-sec breath hold, for use in human subjects with impaired lung function. Like previously described methods, pO2 values are obt

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::105a69adfcda20f7ed0f0413de7e4ed3
https://doi.org/10.1002/mrm.22181

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Hyperpolarized 3He MR Imaging of the Lung: Effect of Subject Immobilization on the Occurrence of Ventilation Defects

Autor: Jeffrey J. Knake, Eduard E. de Lange, Jaime F. Mata, Talissa A. Altes, John P. Mugler, James R. Brookeman

Publikováno v: Academic Radiology. 15:260-264

Rationale and Objectives To investigate immobilization-induced ventilation defects when performing hyperpolarized 3He (H3He) magnetic resonance imaging (MRI) of the lung. Methods and Materials Twelve healthy subjects underwent MRI of the lungs after

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5f74fa918692d167d6e21c1b0566854
https://doi.org/10.1016/j.acra.2007.09.023

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Direct Measurement of Lung Motion Using Hyperpolarized Helium-3 MR Tagging

Autor: Paul W. Read, Eduard E. de Lange, James R. Brookeman, Gordon D. Cates, Jing Cai, Stanley H Benedict, G. Wilson Miller, John P. Mugler, Talissa A. Altes, Ke Sheng

Publikováno v: International Journal of Radiation Oncology*Biology*Physics. 68:650-653

Purpose: To measure lung motion between end-inhalation and end-exhalation using a hyperpolarized helium-3 (HP 3 He) magnetic resonance (MR) tagging technique. Methods and Materials: Three healthy volunteers underwent MR tagging studies after inhalati

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58ba1201112c622cd4a0628f50979874
https://doi.org/10.1016/j.ijrobp.2007.02.011

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XTC MRI: Sensitivity improvement through parameter optimization

Autor: James R. Brookeman, Kai Ruppert, Hsuan-Tsung J. Wang, John P. Mugler, William A. Tobias, Jaime F. Mata, Gordon D. Cates, Klaus D. Hagspiel

Publikováno v: Magnetic Resonance in Medicine. 57:1099-1109

Xenon polarization Transfer Contrast (XTC) MRI pulse sequences permit the gas exchange of hyperpolarized xenon-129 in the lung to be measured quantitatively. However, the pulse sequence parameter values employed in previously published work were dete

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9cd99b4ca85c2ed9bfaf09f4f11c4e7
https://doi.org/10.1002/mrm.21241

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MR grid-tagging using hyperpolarized helium-3 for regional quantitative assessment of pulmonary biomechanics and ventilation

Autor: James R. Brookeman, Gordon D. Cates, Paul W. Read, Jaime F. Mata, John P. Mugler, Ke Sheng, E E de Lange, Xiaodong Zhong, Talissa A. Altes, Jing Cai, G.W. Miller

Publikováno v: Magnetic Resonance in Medicine. 58:373-380

A new technique is demonstrated in six healthy human subjects that combines grid-tagging and hyperpolarized helium-3 MRI to assess regional lung biomechanical function and quantitative ventilation. 2D grid-tagging, achieved by applying sinc-modulated

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5aaa375bdb54b1dfa38ab03dcfc2cbbe
https://doi.org/10.1002/mrm.21288

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A computer simulated phantom study of tomotherapy dose optimization based on probability density functions (PDF) and potential errors caused by low reproducibility of PDF

Autor: Ke Sheng, Jing Cai, J Molloy, James R. Brookeman, John J. Christopher, Paul W. Read

Publikováno v: Medical Physics. 33:3321-3326

Lung tumor motion trajectories measured by four-dimensional CT or dynamic MRI can be converted to a probability density function (PDF), which describes the probability of the tumor at a certain position, for PDF based treatment planning. Using this m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ea2701871a316dff41b82de147ffc51a
https://doi.org/10.1118/1.2222331

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Hyperpolarized HHe 3 MRI of the Lung in Cystic Fibrosis

Autor: Kimiknu Mentore, Eduard E. de Lange, Alix Paget-Brown, James R. Brookeman, Talissa A. Altes, Deborah K. Froh

Publikováno v: Academic Radiology. 12:1423-1429

Rationale and Objectives The purpose of this study is to determine hyperpolarized helium 3 (HHe) magnetic resonance (MR) findings of the lung in patients with cystic fibrosis (CF) compared with healthy subjects and determine whether HHe MR can detect

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d78daff904925fda6f633e44f04e3456
https://doi.org/10.1016/j.acra.2005.07.008

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