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Shortening MR Image Acquisition Time for Volumetric Interpolated Breath-hold Examination with a Recently Developed Parallel Imaging Reconstruction Technique: Clinical Feasibility¹

¹ From the Departments of Radiology (C.A.M., D.L., M.M., I.P., N.M.R.), Medicine (Cardiovascular Division) (D.K.S.), and Neurology (B.J.R.), Beth Israel Deaconess Medical Center, 330 Brookline Ave, Room AN-239, Boston, MA 02215; Harvard Medical School, Boston, Mass (C.A.M., D.L., M.M., I.P., D.K.S., N.M.R.); and Harvard-MIT Division of Health Sciences and Technology, Boston, Mass (E.N.Y., D.K.S.). Received October 7, 2002; revision requested December 3; final revision received June 2, 2003; accepted June 25. D.K.S. supported by National Institutes of Health grants R29 HL60802 and R01 EB00447 and by a Whitaker Foundation Biomedical Engineering grant. Address correspondence to C.A.M. (e-mail: charles_mckenzie@caregroup.harvard.edu).

A recently developed parallel magnetic resonance (MR) imaging technique, parallel imaging with an augmented radius in k space, was used to accelerate the volumetric interpolated breath-hold examination (VIBE) performed in 20 patients referred for clinical liver imaging. Nonaccelerated MR images were also acquired in these patients. A five-point scale was used to score the quality of the images. The acceleration resulted in reduced image quality: The nonaccelerated images had a significantly higher (P < .05) mean score—3.8 ± 0.3 (SD), indicating good quality—than the accelerated images—3.0 ± 0.3, indicating acceptable quality. However, for three patients who could not hold their breath for the duration necessary for nonaccelerated imaging, less severe breathing artifacts on the accelerated images resulted in improved quality compared with the quality of the nonaccelerated images. Parallel MR imaging–accelerated VIBE may be beneficial for patients who have difficulty sustaining a breath hold for the duration necessary to perform nonaccelerated imaging.

© RSNA, 2003

Index terms: Magnetic resonance (MR), comparative studies, **.121412, **.121416, **.12143² • Magnetic resonance (MR), reconstruction algorithms, **.121412, **.121416, **.12143 • Magnetic resonance (MR), technology, **.121412, **.121416, **.12143 • Magnetic resonance (MR), three-dimensional, **.121412, **.121416, **.12143

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