Rapid acquisition spin-echo (RASE) MR imaging: A new technique for reduction of artifacts and acquisition time

S. A. Mirowitz, J. K.T. Lee, J. J. Brown, S. S. Eilenberg, Jay Heiken, W. H. Perman

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

The rapid acquisition spin-echo (RASE) technique combines a short repetition time, a short echo time, and a single excitation pusle sequence with half-Fourier data sampling. This allows for acquisition of 11 strongly T1-weighted sections during a single 23-second breath-holding period. Measurements obtained from volunteers and with phantoms reveal that RASE images have a lower signal-to-noise ratio and contrast-to-noise ratio than do conventional muitiacquisition spin-echo (SE) images due to reduced data acquisition. However, liver-spleen contrast and spatial resolution are not affected. Moreover, contrast-to-artifact (C/A) measurements are 77% greater with RASE. When normalized for imaging time, all parameters are significantly higher with RASE, with a C/A per unit time that was 338% higher. Randomized, blinded review of RASE and SE sequences from 20 patients was conducted to evaluate qualitative performance. Excellent to good performances for phase-encoding artifact reduction, edge sharpness, and overall image quality were recorded for 89%, 88%, and 86% of RASE examinations, respectively, versus 41%, 59%, and 47% of conventional SE examinations, respectively. All results were statistically significant with P < .001. RASE is an easily implemented imaging technique that utilizes widely available existing technology. Its major benefits relate to significant reduction in imaging time, elimination of respiratory artifacts, and the potential for performing dynamic contrast material-enhanced screening examinations.

Original languageEnglish (US)
Pages (from-to)131-135
Number of pages5
JournalRadiology
Volume175
Issue number1
DOIs
StatePublished - Jan 1 1990
Externally publishedYes

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Artifacts
Magnetic Resonance Imaging
Breath Holding
Signal-To-Noise Ratio
Contrast Media
Noise
Volunteers
Spleen
Technology
Liver

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

Rapid acquisition spin-echo (RASE) MR imaging : A new technique for reduction of artifacts and acquisition time. / Mirowitz, S. A.; Lee, J. K.T.; Brown, J. J.; Eilenberg, S. S.; Heiken, Jay; Perman, W. H.

In: Radiology, Vol. 175, No. 1, 01.01.1990, p. 131-135.

Research output: Contribution to journalArticle

Mirowitz, S. A. ; Lee, J. K.T. ; Brown, J. J. ; Eilenberg, S. S. ; Heiken, Jay ; Perman, W. H. / Rapid acquisition spin-echo (RASE) MR imaging : A new technique for reduction of artifacts and acquisition time. In: Radiology. 1990 ; Vol. 175, No. 1. pp. 131-135.
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