Effects of MRI scan acceleration on brain volume measurement consistency

Gunnar Krueger, Cristina Granziera, Clifford R. Jack, Jeffrey L. Gunter, Arne Littmann, Bénédicte Mortamet, Stephan Kannengiesser, Alma Gregory Sorensen, Chadwick P. Ward, Denise A. Reyes, Paula J. Britson, Hubertus Fischer, Matt A. Bernstein

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Purpose: To evaluate the effects of recent advances in magnetic resonance imaging (MRI) radiofrequency (RF) coil and parallel imaging technology on brain volume measurement consistency. Materials and Methods: In all, 103 whole-brain MRI volumes were acquired at a clinical 3T MRI, equipped with a 12- and 32-channel head coil, using the T1-weighted protocol as employed in the Alzheimer's Disease Neuroimaging Initiative study with parallel imaging accelerations ranging from 1 to 5. An experienced reader performed qualitative ratings of the images. For quantitative analysis, differences in composite width (CW, a measure of image similarity) and boundary shift integral (BSI, a measure of whole-brain atrophy) were calculated. Results: Intra- and intersession comparisons of CW and BSI measures from scans with equal acceleration demonstrated excellent scan-rescan accuracy, even at the highest acceleration applied. Pairs-of-scans acquired with different accelerations exhibited poor scan-rescan consistency only when differences in the acceleration factor were maximized. A change in the coil hardware between compared scans was found to bias the BSI measure. Conclusion: The most important findings are that the accelerated acquisitions appear to be compatible with the assessment of high-quality quantitative information and that for highest scan-rescan accuracy in serial scans the acquisition protocol should be kept as consistent as possible over time.

Original languageEnglish (US)
Pages (from-to)1234-1240
Number of pages7
JournalJournal of Magnetic Resonance Imaging
Issue number5
StatePublished - Nov 2012


  • brain
  • magnetic resonance imaging (MRI)
  • measurement consistency

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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