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Boulant N, Le Ster C, Amadon A, Aubert G, Beckett A, Belorgey J, Bonnelye C, Bosch D, Brunner DO, Dilasser G, Dubois O, Ehses P, Feinberg D, Feizollah S, Gras V, Gross S, Guihard Q, Lannou H, Le Bihan D, Mauconduit F, Molinié F, Nunio F, Pruessmann K, Quettier L, Scheffler K, Stöcker T, Tardif C, Ugurbil K, Vignaud A, Vu A, Wu X. The possible influence of third-order shim coils on gradient-magnet interactions: an inter-field and inter-site study. MAGMA 2024; 37:169-183. [PMID: 38197908 PMCID: PMC10995016 DOI: 10.1007/s10334-023-01138-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 11/28/2023] [Accepted: 11/30/2023] [Indexed: 01/11/2024]
Abstract
OBJECTIVE To assess the possible influence of third-order shim coils on the behavior of the gradient field and in gradient-magnet interactions at 7 T and above. MATERIALS AND METHODS Gradient impulse response function measurements were performed at 5 sites spanning field strengths from 7 to 11.7 T, all of them sharing the same exact whole-body gradient coil design. Mechanical fixation and boundary conditions of the gradient coil were altered in several ways at one site to study the impact of mechanical coupling with the magnet on the field perturbations. Vibrations, power deposition in the He bath, and field dynamics were characterized at 11.7 T with the third-order shim coils connected and disconnected inside the Faraday cage. RESULTS For the same whole-body gradient coil design, all measurements differed greatly based on the third-order shim coil configuration (connected or not). Vibrations and gradient transfer function peaks could be affected by a factor of 2 or more, depending on the resonances. Disconnecting the third-order shim coils at 11.7 T also suppressed almost completely power deposition peaks at some frequencies. DISCUSSION Third-order shim coil configurations can have major impact in gradient-magnet interactions with consequences on potential hardware damage, magnet heating, and image quality going beyond EPI acquisitions.
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Affiliation(s)
- Nicolas Boulant
- CEA, CNRS, BAOBAB, NeuroSpin, University Paris-Saclay, 91191, Gif Sur Yvette Cedex, France.
| | - Caroline Le Ster
- CEA, CNRS, BAOBAB, NeuroSpin, University Paris-Saclay, 91191, Gif Sur Yvette Cedex, France
| | - Alexis Amadon
- CEA, CNRS, BAOBAB, NeuroSpin, University Paris-Saclay, 91191, Gif Sur Yvette Cedex, France
| | - Guy Aubert
- CEA, Irfu, DACM, University Paris-Saclay, Gif Sur Yvette, France
| | - Alexander Beckett
- Brain Imaging Center and Helen Wills Neuroscience Institute, University of California, Berkeley, CA, USA
- Advanced MRI Technologies, Sebastopol, CA, USA
| | - Jean Belorgey
- CEA, Irfu, DIS, University Paris-Saclay, Gif Sur Yvette, France
| | - Cédric Bonnelye
- CEA, CNRS, BAOBAB, NeuroSpin, University Paris-Saclay, 91191, Gif Sur Yvette Cedex, France
| | - Dario Bosch
- Department for Biomedical Magnetic Resonance, University of Tübingen, Tübingen, Germany
- High-Field MR Center, Max Planck Institute for Biological Cybernetics, Tübingen, Germany
| | | | | | - Olivier Dubois
- CEA, Irfu, DIS, University Paris-Saclay, Gif Sur Yvette, France
| | | | - David Feinberg
- Brain Imaging Center and Helen Wills Neuroscience Institute, University of California, Berkeley, CA, USA
- Advanced MRI Technologies, Sebastopol, CA, USA
| | - Sajjad Feizollah
- Montreal Neurological Institute-Hospital, McGill University, Montreal, QC, Canada
| | - Vincent Gras
- CEA, CNRS, BAOBAB, NeuroSpin, University Paris-Saclay, 91191, Gif Sur Yvette Cedex, France
| | | | - Quentin Guihard
- CEA, Irfu, DIS, University Paris-Saclay, Gif Sur Yvette, France
| | - Hervé Lannou
- CEA, Irfu, DACM, University Paris-Saclay, Gif Sur Yvette, France
| | - Denis Le Bihan
- CEA, CNRS, BAOBAB, NeuroSpin, University Paris-Saclay, 91191, Gif Sur Yvette Cedex, France
| | - Franck Mauconduit
- CEA, CNRS, BAOBAB, NeuroSpin, University Paris-Saclay, 91191, Gif Sur Yvette Cedex, France
| | | | - François Nunio
- CEA, Irfu, DIS, University Paris-Saclay, Gif Sur Yvette, France
| | | | - Lionel Quettier
- CEA, Irfu, DACM, University Paris-Saclay, Gif Sur Yvette, France
| | - Klaus Scheffler
- Department for Biomedical Magnetic Resonance, University of Tübingen, Tübingen, Germany
- High-Field MR Center, Max Planck Institute for Biological Cybernetics, Tübingen, Germany
| | - Tony Stöcker
- Center for Neurogenerative Diseases, Bonn, Germany
| | - Christine Tardif
- Montreal Neurological Institute-Hospital, McGill University, Montreal, QC, Canada
| | - Kamil Ugurbil
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
| | - Alexandre Vignaud
- CEA, CNRS, BAOBAB, NeuroSpin, University Paris-Saclay, 91191, Gif Sur Yvette Cedex, France
| | - An Vu
- University of California, San Francisco, CA, USA
- San Francisco VA Health Care System, San Francisco, CA, USA
| | - Xiaoping Wu
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
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Gruber B, Stockmann JP, Mareyam A, Keil B, Bilgic B, Chang Y, Kazemivalipour E, Beckett AJ, Vu AT, Feinberg D, Wald LL. A 128-channel receive array for cortical brain imaging at 7 T. Magn Reson Med 2023; 90:2592-2607. [PMID: 37582214 PMCID: PMC10543549 DOI: 10.1002/mrm.29798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 06/27/2023] [Accepted: 06/28/2023] [Indexed: 08/17/2023]
Abstract
PURPOSE A 128-channel receive-only array for brain imaging at 7 T was simulated, designed, constructed, and tested within a high-performance head gradient designed for high-resolution functional imaging. METHODS The coil used a tight-fitting helmet geometry populated with 128 loop elements and preamplifiers to fit into a 39 cm diameter space inside a built-in gradient. The signal-to-noise ratio (SNR) and parallel imaging performance (1/g) were measured in vivo and simulated using electromagnetic modeling. The histogram of 1/g factors was analyzed to assess the range of performance. The array's performance was compared to the industry-standard 32-channel receive array and a 64-channel research array. RESULTS It was possible to construct the 128-channel array with body noise-dominated loops producing an average noise correlation of 5.4%. Measurements showed increased sensitivity compared with the 32-channel and 64-channel array through a combination of higher intrinsic SNR and g-factor improvements. For unaccelerated imaging, the 128-channel array showed SNR gains of 17.6% and 9.3% compared to the 32-channel and 64-channel array, respectively, at the center of the brain and 42% and 18% higher SNR in the peripheral brain regions including the cortex. For R = 5 accelerated imaging, these gains were 44.2% and 24.3% at the brain center and 86.7% and 48.7% in the cortex. The 1/g-factor histograms show both an improved mean and a tighter distribution by increasing the channel count, with both effects becoming more pronounced at higher accelerations. CONCLUSION The experimental results confirm that increasing the channel count to 128 channels is beneficial for 7T brain imaging, both for increasing SNR in peripheral brain regions and for accelerated imaging.
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Affiliation(s)
- Bernhard Gruber
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
- High Field MR Center, Center for Medical Physics and Biomedical Engineering, Medical University Vienna, Austria
| | - Jason P. Stockmann
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Azma Mareyam
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Boris Keil
- Institute of Medical Physics and Radiation Protection, Department of Life Science Engineering, Mittelhessen University of Applied Sciences, Giessen, Germany
- Department of Diagnostic and Interventional Radiology, University Hospital Marburg, Philipps University of Marburg, Marburg, Germany
| | - Berkin Bilgic
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Yulin Chang
- Siemens Medical Solutions USA, Inc., Malvern, PA, USA
| | - Ehsan Kazemivalipour
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
| | - Alexander J.S. Beckett
- Advanced MRI Technologies, Sebastopol, CA, USA
- Helen Wills Institute for Neuroscience, University of California, Berkeley, CA, USA
| | - An T. Vu
- Radiology, University of California, San Francisco, CA, USA
- San Francisco Veteran Affairs Health Care System, San Francisco, CA, USA
| | - David Feinberg
- Advanced MRI Technologies, Sebastopol, CA, USA
- Helen Wills Institute for Neuroscience, University of California, Berkeley, CA, USA
| | - Lawrence L. Wald
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA
- Division of Health Sciences Technology, Harvard - Massachusetts Institute of Technology, Cambridge, MA, USA
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Chan RW, Cron GO, Asaad M, Edelman BJ, Lee HJ, Adesnik H, Feinberg D, Lee JH. Distinct local and brain-wide networks are activated by optogenetic stimulation of neurons specific to each layer of motor cortex. Neuroimage 2022; 263:119640. [PMID: 36176220 PMCID: PMC10025169 DOI: 10.1016/j.neuroimage.2022.119640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 09/13/2022] [Accepted: 09/19/2022] [Indexed: 11/20/2022] Open
Abstract
Primary motor cortex (M1) consists of a stack of interconnected but distinct layers (L1-L6) which affect motor control through large-scale networks. However, the brain-wide functional influence of each layer is poorly understood. We sought to expand our knowledge of these layers' circuitry by combining Cre-driver mouse lines, optogenetics, fMRI, and electrophysiology. Neuronal activities initiated in Drd3 neurons (within L2/3) were mainly confined within M1, while stimulation of Scnn1a, Rbp4, and Ntsr1 neurons (within L4, L5, and L6, respectively) evoked distinct responses in M1 and motor-related subcortical regions, including striatum and motor thalamus. We also found that fMRI responses from targeted stimulations correlated with both local field potentials (LFPs) and spike changes. This study represents a step forward in our understanding of how different layers of primary motor cortex are embedded in brain-wide circuitry.
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Affiliation(s)
- Russell W Chan
- Department of Neurology and Neurological Sciences, Stanford University, CA 94305, USA
| | - Greg O Cron
- Department of Neurology and Neurological Sciences, Stanford University, CA 94305, USA
| | - Mazen Asaad
- Department of Molecular and Cellular Physiology, Stanford University, CA 94305, USA
| | - Bradley J Edelman
- Department of Neurology and Neurological Sciences, Stanford University, CA 94305, USA
| | - Hyun Joo Lee
- Department of Neurology and Neurological Sciences, Stanford University, CA 94305, USA
| | - Hillel Adesnik
- Helen Wills Neuroscience Institute, University of California, Berkeley, CA 94720, USA
| | - David Feinberg
- Helen Wills Neuroscience Institute, University of California, Berkeley, CA 94720, USA
| | - Jin Hyung Lee
- Department of Neurology and Neurological Sciences, Stanford University, CA 94305, USA; Department of Bioengineering, Stanford University, CA 94305, USA; Department of Neurosurgery, Stanford University, CA 94305, USA; Department of Electrical Engineering, Stanford University, CA 94305, USA.
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Pisanski K, Feinberg D, Oleszkiewicz A, Sorokowska A. Voice cues are used in a similar way by blind and sighted adults when assessing women's body size. Sci Rep 2017; 7:10329. [PMID: 28871192 PMCID: PMC5583321 DOI: 10.1038/s41598-017-10470-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 08/10/2017] [Indexed: 12/01/2022] Open
Abstract
Humans’ ability to gauge another person’s body size from their voice alone may serve multiple functions ranging from threat assessment to speaker normalization. However, how this ability is acquired remains unknown. In two experiments we tested whether sighted, congenitally blind and late blind adults could accurately judge the relative heights of women from paired voice stimuli, and importantly, whether errors in size estimation varied with task difficulty across groups. Both blind (n = 56) and sighted (n = 61) listeners correctly judged women’s relative heights on approximately 70% of low difficulty trials, corroborating previous findings for judging men’s heights. However, accuracy dropped to chance levels for intermediate difficulty trials and to 25% for high difficulty trials, regardless of the listener’s sightedness, duration of vision loss, sex, or age. Thus, blind adults estimated women’s height with the same degree of accuracy, but also the same pattern of errors, as did sighted controls. Our findings provide further evidence that visual experience is not necessary for accurate body size estimation. Rather, both blind and sighted listeners appear to follow a general rule, mapping low auditory frequencies to largeness across a range of contexts. This sound-size mapping emerges without visual experience, and is likely very important for humans.
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Affiliation(s)
- Katarzyna Pisanski
- Institute of Psychology, University of Wroclaw, Wroclaw, Poland. .,Mammal Vocal Communication and Cognition Research Group, University of Sussex, Brighton, UK.
| | - David Feinberg
- Department of Psychology, Behaviour & Neuroscience, McMaster University, Hamilton, Canada
| | - Anna Oleszkiewicz
- Institute of Psychology, University of Wroclaw, Wroclaw, Poland.,Smell & Taste Clinic, Department of Otorhinolaryngology, TU Dresden, Germany
| | - Agnieszka Sorokowska
- Institute of Psychology, University of Wroclaw, Wroclaw, Poland.,Smell & Taste Clinic, Department of Otorhinolaryngology, TU Dresden, Germany
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Adluru G, Gur Y, Chen L, Feinberg D, Anderson J, DiBella EVR. MRI reconstruction of multi-image acquisitions using a rank regularizer with data reordering. Med Phys 2016; 42:4734-44. [PMID: 26233201 DOI: 10.1118/1.4926777] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
PURPOSE To improve rank constrained reconstructions for undersampled multi-image MRI acquisitions. METHODS Motivated by the recent developments in low-rank matrix completion theory and its applicability to rapid dynamic MRI, a new reordering-based rank constrained reconstruction of undersampled multi-image data that uses prior image information is proposed. Instead of directly minimizing the nuclear norm of a matrix of estimated images, the nuclear norm of reordered matrix values is minimized. The reordering is based on the prior image estimates. The method is tested on brain diffusion imaging data and dynamic contrast enhanced myocardial perfusion data. RESULTS Good quality images from data undersampled by a factor of three for diffusion imaging and by a factor of 3.5 for dynamic cardiac perfusion imaging with respiratory motion were obtained. Reordering gave visually improved image quality over standard nuclear norm minimization reconstructions. Root mean squared errors with respect to ground truth images were improved by ∼18% and ∼16% with reordering for diffusion and perfusion applications, respectively. CONCLUSIONS The reordered low-rank constraint is a way to inject prior image information that offers improvements over a standard low-rank constraint for undersampled multi-image MRI reconstructions.
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Affiliation(s)
- Ganesh Adluru
- UCAIR, Department of Radiology, University of Utah, Salt Lake City, Utah 84108
| | - Yaniv Gur
- IBM Almaden Research Center, San Jose, California 95120
| | - Liyong Chen
- Advanced MRI Technologies, Sebastpool, California, 95472
| | - David Feinberg
- Advanced MRI Technologies, Sebastpool, California, 95472
| | - Jeffrey Anderson
- UCAIR, Department of Radiology, University of Utah, Salt Lake City, Utah 84108
| | - Edward V R DiBella
- UCAIR, Department of Radiology, University of Utah, Salt Lake City, Utah 84108 and Department of Bioengineering, University of Utah, Salt Lake City, Utah 84112
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Feinberg D, Steele G, Robeznieks A. Aiming to provide concierge care 'for the masses'. Mod Healthc 2015; 45:30-31. [PMID: 26619696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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Sotiropoulos SN, Moeller S, Jbabdi S, Xu J, Andersson JL, Auerbach EJ, Yacoub E, Feinberg D, Setsompop K, Wald L, Behrens T, Ugurbil K, Lenglet C. Effects of image reconstruction on fiber orientation mapping from multichannel diffusion MRI: reducing the noise floor using SENSE. Magn Reson Med 2013; 70:1682-9. [PMID: 23401137 PMCID: PMC3657588 DOI: 10.1002/mrm.24623] [Citation(s) in RCA: 145] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Revised: 11/10/2012] [Accepted: 12/09/2012] [Indexed: 11/11/2022]
Abstract
PURPOSE To examine the effects of the reconstruction algorithm of magnitude images from multichannel diffusion MRI on fiber orientation estimation. THEORY AND METHODS It is well established that the method used to combine signals from different coil elements in multichannel MRI can have an impact on the properties of the reconstructed magnitude image. Using a root-sum-of-squares approach results in a magnitude signal that follows an effective noncentral-χ distribution. As a result, the noise floor, the minimum measurable in the absence of any true signal, is elevated. This is particularly relevant for diffusion-weighted MRI, where the signal attenuation is of interest. RESULTS In this study, we illustrate problems that such image reconstruction characteristics may cause in the estimation of fiber orientations, both for model-based and model-free approaches, when modern 32-channel coils are used. We further propose an alternative image reconstruction method that is based on sensitivity encoding (SENSE) and preserves the Rician nature of the single-channel, magnitude MR signal. We show that for the same k-space data, root-sum-of-squares can cause excessive overfitting and reduced precision in orientation estimation compared with the SENSE-based approach. CONCLUSION These results highlight the importance of choosing the appropriate image reconstruction method for tractography studies that use multichannel receiver coils for diffusion MRI acquisition.
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Affiliation(s)
- S. N. Sotiropoulos
- Centre for Functional Magnetic Resonance Imaging of the Brain, University of Oxford, Oxford, UK
| | - S. Moeller
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
| | - S. Jbabdi
- Centre for Functional Magnetic Resonance Imaging of the Brain, University of Oxford, Oxford, UK
| | - J. Xu
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
| | - J. L. Andersson
- Centre for Functional Magnetic Resonance Imaging of the Brain, University of Oxford, Oxford, UK
| | - E. J. Auerbach
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
| | - E. Yacoub
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
| | - D. Feinberg
- Advanced MRI Technologies, Sebastopol, CA, USA
- Helen Wills Institute for Neuroscience, University of California, Berkeley, CA, USA
| | - K. Setsompop
- Department of Radiology, Massachusetts General Hospital, Charlestown, MA, USA
| | - L.L. Wald
- Department of Radiology, Massachusetts General Hospital, Charlestown, MA, USA
| | - T.E.J. Behrens
- Centre for Functional Magnetic Resonance Imaging of the Brain, University of Oxford, Oxford, UK
- Wellcome Trust Centre for NeuroImaging, University College London, London, UK
| | - K. Ugurbil
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
| | - C. Lenglet
- Center for Magnetic Resonance Research, University of Minnesota, Minneapolis, MN, USA
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Landers D, Matsen P, Gordon D, Gove M, Glenn R, Barron E, Dyson P, Haldeman D, Akins J, Feinberg D, Wright B, Stanziano D, Dyer E, Vitelli T, Holubec O, Reynolds K, Weiss R. What are your marketing and communications priorities for next year? How has health care reform impacted your strategies? Mark Health Serv 2013; 33:6-9. [PMID: 24640457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
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Feinberg D. 10 minutes with David Feinberg. Interview by Rhoda Weiss. Mark Health Serv 2013; 33:14-17. [PMID: 24069682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
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Liu Y, Zhu X, Feinberg D, Guenther M, Gregori J, Weiner MW, Schuff N. Arterial spin labeling MRI study of age and gender effects on brain perfusion hemodynamics. Magn Reson Med 2012; 68:912-22. [PMID: 22139957 DOI: 10.1002/mrm.23286] [Citation(s) in RCA: 139] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 09/30/2011] [Accepted: 10/13/2011] [Indexed: 11/11/2022]
Abstract
Normal aging is associated with diminished brain perfusion measured as cerebral blood flow (CBF), but previously it is difficult to accurately measure various aspects of perfusion hemodynamics including: bolus arrival times and delays through small arterioles, expressed as arterial-arteriole transit time. To study hemodynamics in greater detail, volumetric arterial spin labeling MRI with variable postlabeling delays was used together with a distributed, dual-compartment tracer model. The main goal was to determine how CBF and other perfusion hemodynamics vary with aging. Twenty cognitive normal female and 15 male subjects (age: 23-84 years old) were studied at 4 T. Arterial spin labeling measurements were performed in the posterior cingulate cortex, precuneus, and whole brain gray matter. CBF declined with advancing age (P < 0.001). Separately from variations in bolus arrival times, arterial-arteriole transit time increased with advancing age (P < 0.01). Finally, women had overall higher CBF values (P < 0.01) and shorter arterial-arteriole transit time (P < 0.01) than men, regardless of age. The findings imply that CBF and blood transit times are compromised in aging, and these changes together with differences between genders should be taken into account when studying brain perfusion.
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Affiliation(s)
- Yinan Liu
- Center for Imaging of Neurodegenerative Diseases, Department of Veterans Affairs Medical Center, San Francisco, California, USA.
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Van Essen DC, Ugurbil K, Auerbach E, Barch D, Behrens TEJ, Bucholz R, Chang A, Chen L, Corbetta M, Curtiss SW, Della Penna S, Feinberg D, Glasser MF, Harel N, Heath AC, Larson-Prior L, Marcus D, Michalareas G, Moeller S, Oostenveld R, Petersen SE, Prior F, Schlaggar BL, Smith SM, Snyder AZ, Xu J, Yacoub E. The Human Connectome Project: a data acquisition perspective. Neuroimage 2012; 62:2222-31. [PMID: 22366334 DOI: 10.1016/j.neuroimage.2012.02.018] [Citation(s) in RCA: 1309] [Impact Index Per Article: 109.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2011] [Revised: 10/24/2011] [Accepted: 02/08/2012] [Indexed: 11/28/2022] Open
Abstract
The Human Connectome Project (HCP) is an ambitious 5-year effort to characterize brain connectivity and function and their variability in healthy adults. This review summarizes the data acquisition plans being implemented by a consortium of HCP investigators who will study a population of 1200 subjects (twins and their non-twin siblings) using multiple imaging modalities along with extensive behavioral and genetic data. The imaging modalities will include diffusion imaging (dMRI), resting-state fMRI (R-fMRI), task-evoked fMRI (T-fMRI), T1- and T2-weighted MRI for structural and myelin mapping, plus combined magnetoencephalography and electroencephalography (MEG/EEG). Given the importance of obtaining the best possible data quality, we discuss the efforts underway during the first two years of the grant (Phase I) to refine and optimize many aspects of HCP data acquisition, including a new 7T scanner, a customized 3T scanner, and improved MR pulse sequences.
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Affiliation(s)
- D C Van Essen
- Department of Anatomy & Neurobiology, Washington University, St. Louis, MO, USA.
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Zimmermann J, Goebel R, De Martino F, van de Moortele PF, Feinberg D, Adriany G, Chaimow D, Shmuel A, Uğurbil K, Yacoub E. Mapping the organization of axis of motion selective features in human area MT using high-field fMRI. PLoS One 2011; 6:e28716. [PMID: 22163328 PMCID: PMC3233606 DOI: 10.1371/journal.pone.0028716] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Accepted: 11/14/2011] [Indexed: 11/18/2022] Open
Abstract
Functional magnetic resonance imaging (fMRI) at high magnetic fields has made it possible to investigate the columnar organization of the human brain in vivo with high degrees of accuracy and sensitivity. Until now, these results have been limited to the organization principles of early visual cortex (V1). While the middle temporal area (MT) has been the first identified extra-striate visual area shown to exhibit a columnar organization in monkeys, evidence of MT's columnar response properties and topographic layout in humans has remained elusive. Research using various approaches suggests similar response properties as in monkeys but failed to provide direct evidence for direction or axis of motion selectivity in human area MT. By combining state of the art pulse sequence design, high spatial resolution in all three dimensions (0.8 mm isotropic), optimized coil design, ultrahigh field magnets (7 Tesla) and novel high resolution cortical grid sampling analysis tools, we provide the first direct evidence for large-scale axis of motion selective feature organization in human area MT closely matching predictions from topographic columnar-level simulations.
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Affiliation(s)
- Jan Zimmermann
- Department of Cognitive Neuroscience, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands
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Vingilis-Jaremko L, Maurer D, Feinberg D. The attractiveness of facial avergeness: A comparison of adults and children. J Vis 2011. [DOI: 10.1167/11.11.448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Reynoso AA, Usaj G, Balseiro CA, Feinberg D, Avignon M. Anomalous Josephson current in junctions with spin polarizing quantum point contacts. Phys Rev Lett 2008; 101:107001. [PMID: 18851244 DOI: 10.1103/physrevlett.101.107001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2008] [Indexed: 05/26/2023]
Abstract
We consider a ballistic Josephson junction with a quantum point contact in a two-dimensional electron gas with Rashba spin-orbit coupling. The point contact acts as a spin filter when embedded in a circuit with normal electrodes. We show that with an in-plane external magnetic field an anomalous supercurrent appears even for zero phase difference between the superconducting electrodes. In addition, the external field induces large critical current asymmetries between the two flow directions, leading to supercurrent rectifying effects.
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Affiliation(s)
- A A Reynoso
- Instituto Balseiro, Centro Atómico Bariloche, Río Negro, Argentina
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Zhu X, Schuff N, Gunther M, Feinberg D, Zhang Y, Jahng GH, Weiner MW. O1–05–02: Age and Alzheimer's disease related effects on cerebral blood flow and arterial transit time of posterior cingulate cortex with serial arterial spin labeling MRI. Alzheimers Dement 2007. [DOI: 10.1016/j.jalz.2007.04.069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Xiaoping Zhu
- Department of RadiologyUCSFSan FranciscoCAUSA
- Center for Imaging of Neurodegenerative DiseasesVA Medical CenterSan FranciscoCAUSA
| | - Norbert Schuff
- Department of RadiologyUCSFSan FranciscoCAUSA
- Center for Imaging of Neurodegenerative DiseasesVA Medical CenterSan FranciscoCAUSA
| | | | | | - Yu Zhang
- Department of RadiologyUCSFSan FranciscoCAUSA
- Center for Imaging of Neurodegenerative DiseasesVA Medical CenterSan FranciscoCAUSA
| | - Geon-ho Jahng
- Department of RadiologyUCSFSan FranciscoCAUSA
- Center for Imaging of Neurodegenerative DiseasesVA Medical CenterSan FranciscoCAUSA
| | - Michael W. Weiner
- Department of RadiologyUCSFSan FranciscoCAUSA
- Center for Imaging of Neurodegenerative DiseasesVA Medical CenterSan FranciscoCAUSA
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Abstract
Twenty-five 6 to 13-year-old children with autism spectrum disorders, who were high functioning, were given 12 weeks of parent-assisted children's friendship training. Thirteen were prescribed various psychotropic medications by physicians in the community prior to treatment (medicated) while 12 were not (unmedicated). Two parent-rated and three teacher-rated social measures served as outcome variables. Results revealed that unmedicated subjects had greater positive change on three of these five measures when compared to children in the medicated group. It was hypothesized that being prescribed psychotropic medication was a marker for refractory psychosocial treatment response by children with autism spectrum disorders.
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Affiliation(s)
- Fred Frankel
- UCLA School of Medicine, 300 UCLA Medical Plaza, Suite 1402, Los Angeles, CA, 90095-6967, USA,
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19
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Simon P, Feinberg D. Electronic spin precession and interferometry from spin-orbital entanglement in a double quantum dot. Phys Rev Lett 2006; 97:247207. [PMID: 17280318 DOI: 10.1103/physrevlett.97.247207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2006] [Indexed: 05/13/2023]
Abstract
A double quantum dot inserted in parallel between two metallic leads can entangle the electron spin with the orbital (dot index) degree of freedom. An Aharonov-Bohm orbital phase can be transferred to the spinor wave function, providing a geometrical control of the spin precession around a fixed magnetic field. A fully coherent behavior occurs in a mixed orbital-spin Kondo regime. Evidence for the spin precession can be obtained, either using spin-polarized metallic leads or by placing the double dot in one branch of a metallic loop.
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Affiliation(s)
- P Simon
- Laboratoire de Physique et Modélisation des Milieux Condensés, CNRS and Université Joseph Fourier, BP 166, 38042 Grenoble, France
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20
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Zazunov A, Feinberg D, Martin T. Phonon squeezing in a superconducting molecular transistor. Phys Rev Lett 2006; 97:196801. [PMID: 17155648 DOI: 10.1103/physrevlett.97.196801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2006] [Indexed: 05/12/2023]
Abstract
Josephson transport through a single molecule or carbon nanotube is considered in the presence of a local vibrational mode coupled to the electronic charge. The ground-state solution is obtained exactly in the limit of a large superconducting gap and is extended by variational analysis. The Josephson current induces squeezing of the phonon mode, which is controlled by the superconducting phase difference and by the junction asymmetry. Optical probes of nonclassical phonon states are briefly discussed.
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Affiliation(s)
- A Zazunov
- Laboratoire de Physique et Modélisation des Milieux Condensés, Université Joseph Fourier, B.P. 166, 38042 Grenoble, France
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21
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Banatwala M, Farley C, Feinberg D, Humphrey JD. Parameterization of the shape of intracranial saccular aneurysms using Legendre polynomials. Comput Methods Biomech Biomed Engin 2005; 8:93-101. [PMID: 16154873 DOI: 10.1080/10255840500180708] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Our recent studies of the nonlinear mechanics of saccular aneurysms suggest that it is unlikely that these lesions enlarge or rupture via material (limit point) or dynamic (resonance) instabilities. Rather, there is a growing body of evidence from both vascular biology and biomechanical analyses that implicate mechanosensitive growth and remodeling processes. There is, therefore, a pressing need to quantify regional multiaxial wall stresses which, because of the membrane-like behavior of many aneurysms, necessitates better information on the applied loads and regional surface curvatures. Herein, we present and illustrate a method whereby regional curvatures can be estimated easily for sub-classes of human aneurysms based on clinically available data from magnetic resonance angiography (MRA). Whereas Legendre polynomials are used to illustrate this approach, different functions may prove useful for different sub-classes of lesions.
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Affiliation(s)
- M Banatwala
- Department of Biomedical Engineering, Texas A&M University, 337 Zachry Engineering Center, 3120 TAMU, College Station, TX, 77843-3120, USA
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22
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Abstract
It is shown that the spin-resolved current shot noise can probe attractive or repulsive interactions in mesoscopic systems. This is illustrated in two physical situations: (i) a normal-superconducting junction where the spin-current noise is found to be zero, and (ii) a single-electron transistor where the spin-current noise is found to be Poissonian. Repulsive interactions may also lead to weak attractive correlations (bunching of opposite spins) in conditions far from equilibrium. Spin-current shot noise can also be used to measure the spin relaxation time T1, and a setup is proposed in a quantum dot geometry.
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Affiliation(s)
- O Sauret
- Laboratoire d'Etudes des Propriétés Electroniques des Solides, Centre National de la Recherche Scientifique, BP 166, 38042 Grenoble 9, France
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23
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Abstract
Four groups were composed of children referred for friendship problems (age range: 6 to 12 years old). One group was diagnosed with both Attention Deficit Hyperactivity Disorder (ADHD) and Oppositional-Defiant Disorder (ODD), one group with ADHD only, one group with ODD only and one group with neither disorder. Parents and teachers were given questionnaires to rate the social behavior of each child. The groups differed significantly on one parent scale (Self-control) and one teacher scale (Aggression). Inspection of the items composing these scales suggested that some items measured social relationships with adults while other items measured peer relationships. Subsequent factor analysis separated peer and adult components. Analysis of subscales derived from factor analysis revealed the diagnosis of ADHD was associated with increases in classroom disruption and decreased resistance to provocation by peers, while the diagnosis of ODD was associated with increased in hostility towards peers, decreased resistance to provocation by peers and decreased respect for adults. Limitations of the study were: domains of social functioning assessed, sample size and diversity, and the absence of a comparison group with adequate peer relationships. Social skills programs should target social deficits associated with ODD and ADHD. The scales refined in the present study offer a convenient means of assessing peer dysfunction from the points of view of parents and teachers.
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Affiliation(s)
- Fred Frankel
- UCLA Department of Psychiatry, Los Angeles, CA, USA
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24
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Varrato J, Siderowf A, Damiano P, Gregory S, Feinberg D, McCluskey L. Postural change of forced vital capacity predicts some respiratory symptoms in ALS. Neurology 2001; 57:357-9. [PMID: 11468332 DOI: 10.1212/wnl.57.2.357] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The detection of respiratory muscle weakness in ALS is necessary to plan initiation of noninvasive positive pressure ventilation and begin discussion of advanced directives. The authors measured the erect seated and supine forced vital capacity (FVC) in 38 patients with ALS and 15 controls. The supine FVC is significantly lower and the erect--supine FVC difference is significantly greater in patients with complaints of dyspnea, orthopnea, and daytime fatigue.
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Affiliation(s)
- J Varrato
- Department of Neurology, University of Pennsylvania, Philadelphia, USA
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Keller MB, Ryan ND, Strober M, Klein RG, Kutcher SP, Birmaher B, Hagino OR, Koplewicz H, Carlson GA, Clarke GN, Emslie GJ, Feinberg D, Geller B, Kusumakar V, Papatheodorou G, Sack WH, Sweeney M, Wagner KD, Weller EB, Winters NC, Oakes R, McCafferty JP. Efficacy of paroxetine in the treatment of adolescent major depression: a randomized, controlled trial. J Am Acad Child Adolesc Psychiatry 2001; 40:762-72. [PMID: 11437014 DOI: 10.1097/00004583-200107000-00010] [Citation(s) in RCA: 440] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To compare paroxetine with placebo and imipramine with placebo for the treatment of adolescent depression. METHOD After a 7- to 14-day screening period, 275 adolescents with major depression began 8 weeks of double-blind paroxetine (20-40 mg), imipramine (gradual upward titration to 200-300 mg), or placebo. The two primary outcome measures were endpoint response (Hamilton Rating Scale for Depression [HAM-D] score < or = 8 or > or = 50% reduction in baseline HAM-D) and change from baseline HAM-D score. Other depression-related variables were (1) HAM-D depressed mood item; (2) depression item of the Schedule for Affective Disorders and Schizophrenia for Adolescents-Lifetime version (K-SADS-L); (3) Clinical Global Impression (CGI) improvement scores of 1 or 2; (4) nine-item depression subscale of K-SADS-L; and (5) mean CGI improvement scores. RESULTS Paroxetine demonstrated significantly greater improvement compared with placebo in HAM-D total score < or = 8, HAM-D depressed mood item, K-SADS-L depressed mood item, and CGI score of 1 or 2. The response to imipramine was not significantly different from placebo for any measure. Neither paroxetine nor imipramine differed significantly from placebo on parent- or self-rating measures. Withdrawal rates for adverse effects were 9.7% and 6.9% for paroxetine and placebo, respectively. Of 31.5% of subjects stopping imipramine therapy because of adverse effects, nearly one third did so because of adverse cardiovascular effects. CONCLUSIONS Paroxetine is generally well tolerated and effective for major depression in adolescents.
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Affiliation(s)
- M B Keller
- Department of Psychiatry and Human Behavior, Brown University School of Medicine, Providence, RI 02906, USA
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Castellani C, Feinberg D, Ranninger J. Electronic and magnetic correlations in an itinerant system of coupled diamagnetic pairs of electrons. ACTA ACUST UNITED AC 2001. [DOI: 10.1088/0022-3719/12/8/016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Abstract
The predominant electrophysiologic feature of vasculitic mononeuropathy multiplex is axonal loss. Electrophysiologic findings interpreted as conduction block have, however, also been reported to occur in neuropathy secondary to necrotizing vasculitis. We report 3 patients with mononeuropathy multiplex and biopsy proven vasculitis in whom eight nerves met criteria for conduction block. In each circumstance, serial study demonstrated conversion of the electrophysiologic findings to those most consistent with severe axonal loss. "Conduction block" in vasculitic mononeuropathy multiplex is secondary to focal axonal conduction failure presumably related to infarctive axonal injury. The term conduction block should be used with caution in this disorder and only if serial studies demonstrate findings consistent with this electrophysiologic diagnosis.
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Affiliation(s)
- L McCluskey
- Department of Neurology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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29
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Abstract
A man with shoulder pain and complaints of weakness had examination findings consistent with a suprascapular neuropathy with predominant involvement of the infraspinatus muscle. Electrodiagnostic studies confirmed an axon-loss suprascapular neuropathy with greater involvement of the infraspinatus muscle. Magnetic resonance imaging (MRI) demonstrated a large ganglion cyst originating from the glenohumeral joint. The clinical, electrodiagnostic, and radiologic evaluation of suprascapular neuropathy is discussed.
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Affiliation(s)
- L McCluskey
- Department of Neurology of the University of Pennsylvania, Pennsylvania Hospital, Philadelphia 19107, USA
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Feinberg D. 5613492 Method and product for improved images in magnetic resonance imaging using multiple breatholding. Magn Reson Imaging 1997. [DOI: 10.1016/s0730-725x(97)89755-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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31
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Feinberg D, Theodorakis S, Ettouhami AM. Model for layered superconductors: From Josephson coupling to three-dimensional behavior. Phys Rev B Condens Matter 1994; 49:6285-6292. [PMID: 10011615 DOI: 10.1103/physrevb.49.6285] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Bulaevskii LN, Meshkov SV, Feinberg D. Evaporation of a single vortex line in a weakly coupled multilayered superconductor. Phys Rev B Condens Matter 1991; 43:3728-3731. [PMID: 9997705 DOI: 10.1103/physrevb.43.3728] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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34
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Feinberg D, Villard C. Intrinsic pinning and lock-in transition of flux lines in layered type-II superconductors. Phys Rev Lett 1990; 65:919-922. [PMID: 10043056 DOI: 10.1103/physrevlett.65.919] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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35
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Zheng H, Feinberg D, Avignon M. Quantum lattice fluctuations in the one-dimensional Peierls-Hubbard model. Phys Rev B Condens Matter 1990; 41:11557-11563. [PMID: 9993577 DOI: 10.1103/physrevb.41.11557] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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36
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37
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Zheng H, Feinberg D, Avignon M. Effect of quantum fluctuations on the Peierls dimerization in the one-dimensional molecular-crystal model. Phys Rev B Condens Matter 1989; 39:9405-9422. [PMID: 9947676 DOI: 10.1103/physrevb.39.9405] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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38
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39
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Feinberg D, Tartaglia P. Theory of orientational relaxation in systems with continuous symmetry. Phys Rev B Condens Matter 1987; 36:2220-2227. [PMID: 9943069 DOI: 10.1103/physrevb.36.2220] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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40
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41
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Feinberg D, Ranninger J. Self-trapping of a small polaron as a nonlinear process: The relaxation of a strongly coupled self-consistent spin-boson system. Phys Rev A Gen Phys 1986; 33:3466-3476. [PMID: 9897058 DOI: 10.1103/physreva.33.3466] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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42
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Crooks LE, Watts J, Hoenninger J, Arakawa M, Kaufman L, Guenther H, Feinberg D. Thin-section definition in magnetic resonance imaging. Technical concepts and their implementation. Radiology 1985; 154:463-7. [PMID: 3966133 DOI: 10.1148/radiology.154.2.3966133] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
In multisection magnetic resonance imaging, gradient strength and earliest desired echo time (TE) set a limit to the thinnest section achievable. Offset radio-frequency irradiation techniques and phase encoding within a thick section make possible the production of thin sections of clinically useful quality in practical imaging times.
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Crooks LE, Barker B, Chang H, Feinberg D, Hoenninger JC, Watts JC, Arakawa M, Kaufman L, Sheldon PE, Botvinick E. Magnetic resonance imaging strategies for heart studies. Radiology 1984; 153:459-65. [PMID: 6484178 DOI: 10.1148/radiology.153.2.6484178] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Given a suitable trigger signal, cardiac synchronized magnetic resonance (MR) imaging is simple to implement; however, single section techniques are not efficacious, especially when the heart rate sets the repetition interval. We demonstrate multi-section, double, and single-echo imaging, any of which rapidly covers the cardiac volume; 3-D modes capable of achieving very thin sections; and cycled multi-section imaging capable of efficaciously providing dynamic data on heart motion. These modes form a complementary, powerful set of options for clinical work.
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Palmer R, Yen A, Kuo I, Feinberg D, Wiedenbeck P, Perez-Mendez V, Skiöldebrand CG, Carlsson E. Computer graphic display of cardiac CT scans. Cardiovasc Intervent Radiol 1982; 5:97-104. [PMID: 7105083 DOI: 10.1007/bf02552087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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45
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Abstract
Two-hundred and ninety-one working women in Israel were interviewed 7-9 months after childbirth. The mean number of months that they had breastfed was 2.03. The duration of breastfeeding increased with religiousity and higher education. Women born in Europe, primiparas and grandparas (4 + children) and those over the age of 40 breastfed longer. Most of the women returned to work only after completing breastfeeding. Duration of breastfeeding was reduced when the mother suffered from stress, tiredness, encountered feeding problems, or if the baby cried excessively.
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Hauser MJ, Feinberg D. Problem solving revisited. J Psychiatr Nurs Ment Health Serv 1977; 15:13-7. [PMID: 200743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In this paper the increasing problems and need for novel solutions in today's world are discussed. A framework consisting of the combination of the problem-solving process and the creative thinking process is considered. Inherent in each process is a predominant mode of thought: reasoning or vertical thinking in the problem-solving process, and imagination or lateral thinking in the creative thinking process. These processes directed in a complementary manner are suggested as a means of solving problems creatively in situations which call for unique and novel solutions.
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50
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Agmon N, Feinberg D. [Treatment of colostomy patients]. Acta Biochim Biophys Acad Sci Hung 1973; 21:26-34. [PMID: 4763835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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