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Titolo:
A NEW SILENT MAGNETIC-RESONANCE-IMAGING USING A ROTATING DC GRADIENT
Autore:
CHO ZH; CHUNG ST; CHUNG JY; PARK SH; KIM JS; MOON CH; HONG IK;
Indirizzi:
UNIV CALIF IRVINE,DEPT RADIOL SCI IRVINE CA 92717 KOREA ADV INST SCI & TECHNOL,DEPT INFORMAT & COMMUNICAT SEOUL SOUTH KOREA
Titolo Testata:
Magnetic resonance in medicine
fascicolo: 2, volume: 39, anno: 1998,
pagine: 317 - 321
SICI:
0740-3194(1998)39:2<317:ANSMUA>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
SENSORY STIMULATION; REDUCTION; SEQUENCE; NOISE; COILS;
Keywords:
GRADIENT PULSING SOUND NOISE; PROJECTION RECONSTRUCTION; ROTATING DC GRADIENT; SILENT MR IMAGING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
Z.H. Cho et al., "A NEW SILENT MAGNETIC-RESONANCE-IMAGING USING A ROTATING DC GRADIENT", Magnetic resonance in medicine, 39(2), 1998, pp. 317-321

Abstract

A new approach to silent MR imaging using a rotating DC gradient has been explored and experimentally studied. Acoustic or sound noise has been one of the problems in examining patients, mainly due to the fastgradient pulsings in interaction with the main magnetic field. The sound noise has been noted to be proportionately louder as the magnetic field strength becomes larger. In this report, we describe a new imaging technique using a mechanically rotating DC gradient coil. The rotating DC gradient coil can effectively replace both phase encoding as well as readout gradient pulsings, and data obtained in this manner can provide a set of projection data that later can be used for projectionreconstruction. With some interpolation techniques one can also perform conventional two-dimensional fast Fourier transform image reconstruction. The sound noise intensity compared with the conventional imaging technique, such as the spin-echo sequence, has been reduced down to about -20.7 dB or 117.5 times with this new technique. The experimental pulse sequence and its principle are described and images obtained by the new silent MR imaging technique are reported.

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Documento generato il 18/01/20 alle ore 21:38:57