Establishing Magnetic Resonance Images Orientation for the EADC-ADNI Manual Hippocampal Segmentation Protocol

EADC-ADNI Working Group on The Harmonized Protocol for Hippocampal Volumetry, Alzheimer's Disease Neuroimaging Initiative

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20 Scopus citations

Abstract

Background and purpose: An effort to define and validate a Harmonized Protocol for standard hippocampal segmentation is being carried out. We wished to estimate the effect of magnetic resonance image (MRI) spatial orientation on manual hippocampal segmentations to define optimal standard orientation of MRIs for hippocampal volumetry. Methods: Three expert tracers segmented twice the hippocampi of 10 ADNI subjects on MRI slices oriented perpendicular to the anterior-posterior commissure (AC-PC) line and the long hippocampal axes plane, following internationally harmonized landmarks. We computed intra and interrater reliability figures for total volumes and similarity coefficients. Results: Total volume reliability was similar for both orientations. Similarity coefficients were significantly higher for the AC-PC orientation (exact P = 0.002). Discussion: These data show that AC-PC orientation is slightly more reliable for manual segmentations, possibly due to better visualization of the cerebrospinal fluid spaces separating hippocampal head and amygdala. A Delphi panel of experts has used these data to decide on the optimal orientation for a Harmonized Protocol for hippocampal segmentation.

Original languageEnglish (US)
Pages (from-to)509-514
Number of pages6
JournalJournal of Neuroimaging
Volume24
Issue number5
DOIs
StatePublished - Jan 1 2014

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Keywords

  • Harmonized protocol
  • Hippocampus
  • Magnetic resonance imaging
  • Manual segmentation
  • Standard operating procedures

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Clinical Neurology

Cite this

EADC-ADNI Working Group on The Harmonized Protocol for Hippocampal Volumetry, & Alzheimer's Disease Neuroimaging Initiative (2014). Establishing Magnetic Resonance Images Orientation for the EADC-ADNI Manual Hippocampal Segmentation Protocol. Journal of Neuroimaging, 24(5), 509-514. https://doi.org/10.1111/jon.12065