Improved image quality and detection of acute cerebral infarction with PROPELLER diffusion-weighted MR imaging

Kirsten P. Forbes, James G. Pipe, John P. Karis, Joseph E. Heiserman

Research output: Contribution to journalArticle

89 Scopus citations

Abstract

PURPOSE: To compare periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) multishot fast spin-echo diffusion-weighted magnetic resonance (MR) imaging with single-shot echo-planar diffusion-weighted MR imaging for image quality and visualization of acute cerebral infarction. MATERIALS AND METHODS: Seventy subjects (35 men, 35 women; mean age, 55 years ± 24 [SD]) who were suspected of having acute cerebral infarction (symptom duration, 2.8 days ± 2.7) underwent PROPELLER and echo-planar MR imaging (b = 1,000 sec/mm2). Two neuroradiologists compared unlabeled images for presence of artifacts, visualization of infarction, and their preference of images. Interobserver agreement and image comparison were assessed by using the κ statistic and the χ2 test, respectively. RESULTS: PROPELLER MR imaging reduced susceptibility artifacts (n = 70 subjects), which limited visualization of temporal (echo-planar, n = 64; PROPELLER, n = 0; P < .01, χ2 test), frontal (echo-planar, n = 58; PROPELLER, n = 1; P < .01), and parietal lobes (echo-planar, n = 5; PROPELLER, n = 0; P < .05) and cerebellum (echo-planar, n = 36; PROPELLER, n = 0; P < .01) and brainstem (echo-planar, n = 23; PROPELLER, n = 0; P < .01). Acute infarction (n = 31 subjects) was better demonstrated at PROPELLER MR imaging (PROPELLER better, n = 18; echo-planar better, n = 1; PROPELLER and echo-planar equal, n = 12; P < .01, χ2 test). PROPELLER MR imaging was preferred in all (n = 70) but one case in which the lesion lay within the intersection gap (PROPELLER preferred, n = 69; echo-planar preferred, n = 1; P < .01, χ2 test). CONCLUSION: With a short increase in imaging time, PROPELLER MR imaging offers better image quality and detection of acute cerebral infarction than does echo-planar MR imaging.

Original languageEnglish (US)
Pages (from-to)551-555
Number of pages5
JournalRadiology
Volume225
Issue number2
DOIs
StatePublished - Nov 1 2002

Keywords

  • Brain, infarction
  • Magnetic resonance (MR), diffusion study
  • Magnetic resonance (MR), k-space
  • Magnetic resonance (MR), pulse sequences

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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