Zobrazeno 1 - 10
of 243
pro vyhledávání: '"David I. Hoult"'
Autor:
Nicolas Boulant, David I. Hoult
Publikováno v:
Magnetic Resonance in Medicine. 67:339-343
When designing a radio-frequency pulse to produce a desired dependence of magnetization on frequency or position, the small flip angle approximation is often used as a first step, and a Fourier relation between pulse and transverse magnetization is t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c563524d53b1e48ba2d408c860503014
https://doi.org/10.1002/mrm.23270
https://doi.org/10.1002/mrm.23270
Autor:
Karl Edler, David I. Hoult
Publikováno v:
Magnetic Resonance in Medicine. 60:277-287
The issue of eddy currents induced by the rapid switching of magnetic field gradients is a long-standing problem. A new method for dealing with this problem is presented whereby spatial harmonic components of the magnetic field are continuously sense
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c723b1a3cc3799e8d5eedfa58778de5
https://doi.org/10.1002/mrm.21693
https://doi.org/10.1002/mrm.21693
Autor:
John K. Saunders, H. Glen Kolansky, Jonathan C. Sharp, Frank A. Roberts, Andrew E. Procca, Rudy A. Sebastian, Garnette R. Sutherland, Dennis L. Kripiakevich, Boguslaw Tomanek, Akos Dombay, David I. Hoult, Marcia Gervin, David L. Rayner
Publikováno v:
Journal of Magnetic Resonance Imaging. 13:78-86
The engineering of a novel intra-operative MRI system is described. A movable, 1.5 Tesla MRI magnet was placed in a neurosurgical operating room without affecting established neurosurgical procedure. The system allows fast, high-quality MR intra-oper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb965af9cc2bc0f05a6aa9e2701657d5
https://doi.org/10.1002/1522-2586(200101)13:1<78::aid-jmri1012>3.0.co
https://doi.org/10.1002/1522-2586(200101)13:1<78::aid-jmri1012>3.0.co
Autor:
David I. Hoult
Publikováno v:
Journal of Magnetic Resonance Imaging. 12:46-67
Image signal-to-noise ratio and power dissipation are investigated theoretically up to 400 MHz. While the text is mathematical, the figures give insights into predictions. Hertz potential is introduced for probe modeling where charge separation canno
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f85967f8d923fa1188ba8f70688e542
https://doi.org/10.1002/1522-2586(200007)12:1<46::aid-jmri6>3.0.co
https://doi.org/10.1002/1522-2586(200007)12:1<46::aid-jmri6>3.0.co
Autor:
David I. Hoult
Publikováno v:
Concepts in Magnetic Resonance. 12:173-187
Confusion exists over the application of the Principle of Reciprocity to NMR signal strength calculations when wavelength in a sample is comparable to the latter's size. A simple and easily reproduced bench experiment that validates the principle is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f93115dad1b173abbacb1d03f8e9ada0
https://doi.org/10.1002/1099-0534(2000)12:4<173::aid-cmr1>3.0.co
https://doi.org/10.1002/1099-0534(2000)12:4<173::aid-cmr1>3.0.co
Autor:
Gwendolyn N. Chmurny, David I. Hoult
Publikováno v:
Concepts in Magnetic Resonance. 2:131-149
The fundamental physics underlying the art of shimming a high-resolution NMR superconducting magnet is described, and the rationale of the design of shim coils, together with their various appelations, is discussed. The effects of the various shims o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6816018c86dabe403e923e500d91cc26
https://doi.org/10.1002/cmr.1820020303
https://doi.org/10.1002/cmr.1820020303
Autor:
Boguslaw Tomanek, David I. Hoult
An analysis is presented of mutually inductive coupling in probe design. It is assumed that near field couplings predominate and that lumped constants may therefore be employed. Using three published designs as examples, analytic techniques are prese
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47442262c007cdbbc679273d38824eee
https://nrc-publications.canada.ca/eng/view/object/?id=230b0f36-6c3d-4ce6-89b5-b93a38e900e6
https://nrc-publications.canada.ca/eng/view/object/?id=230b0f36-6c3d-4ce6-89b5-b93a38e900e6
Autor:
David I. Hoult
Publikováno v:
eMagRes
The sections in this article are 1 Introduction 2 Signal Reception 3 Unavoidable Noise 4 Signal-to-Noise Ratio 5 Electric Fields and Extraneous Noise 6 Conclusion 7 Acknowledgements 8 Biographical Sketch Related Articles
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd1deef6264c7a16792ad0205880814f
https://nrc-publications.canada.ca/eng/view/object/?id=6bc628fa-626e-4829-82ad-33efbddfa334
https://nrc-publications.canada.ca/eng/view/object/?id=6bc628fa-626e-4829-82ad-33efbddfa334
The design and construction of an RF coil system for use in MR breast imaging is described. The two-ring, tuned Helmholtz coil, with its axis perpendicular to the chest, surrounds a single pendant breast and is coupled both internally and to the MRI
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0ba0046de3fdc83e93c7eac8c920f1a
https://nrc-publications.canada.ca/eng/view/object/?id=d2fe90e2-5e54-44bc-9db1-fe4fe38e420e
https://nrc-publications.canada.ca/eng/view/object/?id=d2fe90e2-5e54-44bc-9db1-fe4fe38e420e
Autor:
Deon F. Louw, David I. Hoult, Garnette R. Sutherland, Taro Kaibara, John K. Saunders, Boguslaw Tomanek
Object. The authors' goal was to place a mobile, 1.5-tesla magnetic resonance (MR) imaging system into a neurosurgical operating room without adversely affecting established neurosurgical management. The system would help to plan accurate surgical co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::96280a114a592fe9d332edd02eac719e
https://nrc-publications.canada.ca/eng/view/object/?id=694447e5-cc37-4f98-b97d-0d0e80bb8e50
https://nrc-publications.canada.ca/eng/view/object/?id=694447e5-cc37-4f98-b97d-0d0e80bb8e50