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Titolo:
Diffusion-weighted imaging with navigated interleaved echo-planar imaging and a conventional gradient system
Autore:
Bammer, P; Stollberger, R; Augustin, M; Simbrunner, J; Offenbacher, H; Kooijman, H; Ropele, S; Kapeller, P; Wach, P; Ebner, F; Fazekas, F;
Indirizzi:
Graz Univ, Magnet Resonance Inst, A-8036 Graz, Austria Graz Univ Graz Austria A-8036 agnet Resonance Inst, A-8036 Graz, Austria Graz Univ, Dept Neurol, A-8036 Graz, Austria Graz Univ Graz Austria A-8036 az Univ, Dept Neurol, A-8036 Graz, Austria Graz Univ, Dept Radiol, A-8036 Graz, Austria Graz Univ Graz Austria A-8036 az Univ, Dept Radiol, A-8036 Graz, Austria Philips Med Syst, Hamburg, Germany Philips Med Syst Hamburg GermanyPhilips Med Syst, Hamburg, Germany Graz Univ Technol, Inst Elect & Biomed Engn, A-8010 Graz, Austria Graz Univ Technol Graz Austria A-8010 Biomed Engn, A-8010 Graz, Austria
Titolo Testata:
RADIOLOGY
fascicolo: 3, volume: 211, anno: 1999,
pagine: 799 - 806
SICI:
0033-8419(199906)211:3<799:DIWNIE>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACUTE HUMAN STROKE; CEREBRAL-ISCHEMIA; MOTION ARTIFACTS; HUMAN BRAIN; MRI; COEFFICIENT; CATS;
Keywords:
brain, infarction; brain, MR; magnetic resonance (MR), diffusion study; magnetic resonance (MR), echo planar; magnetic resonance (MR), tissue characterization;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Stollberger, R Graz Univ, Magnet Resonance Inst, Auenbruggerpl 9, A-8036 Graz, Austria Graz Univ Auenbruggerpl 9 Graz Austria A-8036 raz, Austria
Citazione:
P. Bammer et al., "Diffusion-weighted imaging with navigated interleaved echo-planar imaging and a conventional gradient system", RADIOLOGY, 211(3), 1999, pp. 799-806

Abstract

PURPOSE: To demonstrate the technical feasibility; and precision of a navigated diffusion-weighted(DW) MR imaging method with interleaved echo-planarimaging and test its diagnostic sensitivity for detection of ischemic stroke. MATERIALS AND METHODS: Apparent diffusion coefficient (ADC) measurements were performed in phantoms, and six healthy adult volunteers were examined to determine intrasubject (precision) and intersubject (reference range) variations in absolute ADC and relative ADC (rADC) measurements,imaging maps and lesion rADC values were:also;obtained in 34 consecutive stroke patients to evaluate the sensitivity and reliability of DW-interleaved echo-planar:imaging for detection of ischemic brain damage. RESULTS: Phantom and volunteer ADC values were in excellent agreement withpublished data. The intra;subject variation of rADC was 6.2% . The ADC precision ranged from 6.5% in the subcortical white matter in the frontal lobeto 12.9% in the head of the caudate nucleus. Interleaved echo-planar imaging enabled rapid acquisition of high-quality images of the entire brain without substantial artifacts. Within the ist week, the sensitivity of DW-interleaved echo-planar imaging for detection of acute infarction was 90% (18:of 20 true-positive studies); and : independent of lesion location. CONCLUSION: aw-ininterleaved echo-planar with phase navigation and cardiactriggering i;robust reliable; and fast. With high sensitivity for detection of early ischemic infarction, it is useful for examining stroke:patients:by using MR systems with conventional gradient hardware.

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Documento generato il 03/07/20 alle ore 01:32:58