Výsledky vyhledávání - "J A, Helpern"

High-resolution human cervical spinal cord imaging at 7 T

Autor: E E, Sigmund, G A, Suero, C, Hu, K, McGorty, D K, Sodickson, G C, Wiggins, J A, Helpern

Publikováno v: NMR in biomedicine. 25(7)

We present high-resolution anatomical imaging of the cervical spinal cord in healthy volunteers at the ultrahigh field of 7 T with a prototype four-channel radiofrequency coil array, in comparison with 3-T imaging of the same subjects. Signal-to-nois

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::00deb0c4f59c9027a92ec659c670ee95
https://pubmed.ncbi.nlm.nih.gov/22183956

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RF excitation profiles with FAIR: impact of truncation of the arterial input function on quantitative perfusion

Autor: M L, Lipton, C A, Branch, J, Hrabe, D P, Lewis, J A, Helpern

Publikováno v: Journal of magnetic resonance imaging : JMRI. 13(2)

This study investigates the impact of imaging coil length and consequent truncation of the arterial input function on the perfusion signal contrast obtained in the flow-sensitive alternating inversion recovery (FAIR) perfusion imaging measurement. We

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::f6191f4e548a9955acac107b99bd0d10
https://pubmed.ncbi.nlm.nih.gov/11169826

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MR perfusion imaging in human brain using the UNFAIR technique. Un-inverted flow-sensitive alternating inversion recovery

Autor: J L, Tanabe, M, Yongbi, C, Branch, J, Hrabe, G, Johnson, J A, Helpern

Publikováno v: Journal of magnetic resonance imaging : JMRI. 9(6)

Pulsed arterial spin labeling magnetic resonance techniques have been developed recently to estimate cerebral blood flow (CBF). Flow-sensitive alternating inversion recovery (FAIR) is one such technique that has been implemented successfully in human

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::067ab6793e322a91ccad946c520b9370
https://pubmed.ncbi.nlm.nih.gov/10373023

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Rapid and continuous monitoring of cerebral perfusion by magnetic resonance line scan assessment with arterial spin tagging

Autor: C A, Branch, L, Hernandez, M, Yongbi, N C, Huang, J A, Helpern

Publikováno v: NMR in biomedicine. 12(1)

A new approach is presented for rapid and continuous monitoring of cerebral perfusion which is based upon line-scan MR column imaging with arterial spin tagging (AST) of endogenous water. Spin tagging of arterial water protons is accomplished using a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::27a6e85d1785c1921fc1f1b28c82f7ca
https://pubmed.ncbi.nlm.nih.gov/10195325

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Pathophysiological correlates of cerebral ischemia the significance of cellular acid base shifts

Autor: K M, Welch, S R, Levine, J A, Helpern

Publikováno v: Functional neurology. 5(1)

In vivo 31-Phosphorus nuclear magnetic resonance (31PNMR) spectroscopy was used to study regional high energy phosphate, and phospholipid metabolism together with intracellular pH in patients with acute hemispheric ischemic stroke. The pH of ischemic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::55c1d5dd187433cc9cc4bfc208f48a16
https://pubmed.ncbi.nlm.nih.gov/2401427

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ChemInform Abstract: AN IMPROVED GENERAL PROCEDURE FOR THE SYNTHESIS OF N,N′-BIS(ACRYLOYL)DIAMINOALKANES

Autor: J. A. HELPERN, J. T. SPARROW

Publikováno v: Chemischer Informationsdienst. 12

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aeee9467a4b7b98c9d5fe27b2482ccf6
https://doi.org/10.1002/chin.198107189

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Observations suggesting a possible link between gammacarboxyglutamic acid and porcine bioprosthetic valve calcification

Autor: J A, Helpern, S J, McGee, J M, Riddle

Publikováno v: Henry Ford Hospital medical journal. 30(3)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::0189995d7cbd746d97ddc847c58bc01b
https://pubmed.ncbi.nlm.nih.gov/7161130

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ChemInform Abstract: CHEMICAL MODIFICATION OF PEPTIDES CONTAINING Γ-CARBOXYGLUTAMIC ACID

Autor: N. T. III BOGGS, H. D. BRUTON, D. H. CRAIG, J. A. HELPERN, H. C. MARSH, M. D. PEGRAM, D. J. VANDENBERGH, K. A. KOEHLER, R. G. HISKEY

Publikováno v: Chemischer Informationsdienst. 13

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6426f0a1bec8655621806bfee6762f0d
https://doi.org/10.1002/chin.198243342

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In vivo 31-P NMR of photoactivated hematoporphyrin derivative in cat brain

Autor: M, Chopp, J A, Helpern, S, Frinak, F W, Hetzel, J R, Ewing, K M, Welch

Publikováno v: Medical physics. 12(2)

In vivo 31-P nuclear magnetic resonance (NMR) spectroscopy was performed on cat brains injected with hematoporphyrin derivative (HpD). A 2-cm-diam region of the right parietal lobe was photoactivated with red light. The 31-P NMR spectra of the photoa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::c1c7570a42b32c9739d2f6cfa7f3e04f
https://pubmed.ncbi.nlm.nih.gov/4000089

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