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Neuroradiology

, 50:569 | Cite as

Validation of hippocampal volumes measured using a manual method and two automated methods (FreeSurfer and IBASPM) in chronic major depressive disorder

  • Woo Suk Tae
  • Sam Soo Kim
  • Kang Uk Lee
  • Eui-Cheol Nam
  • Keun Woo Kim
Diagnostic Neuroradiology

Abstract

Introduction

To validate the usefulness of the packages available for automated hippocampal volumetry, we measured hippocampal volumes using one manual and two recently developed automated volumetric methods.

Methods

The study included T1-weighted magnetic resonance imaging (MRI) of 21 patients with chronic major depressive disorder (MDD) and 20 normal controls. Using coronal turbo field echo (TFE) MRI with a slice thickness of 1.3 mm, the hippocampal volumes were measured using three methods: manual volumetry, surface-based parcellation using FreeSurfer, and individual atlas-based volumetry using IBASPM. In addition, the intracranial cavity volume (ICV) was measured manually.

Results

The absolute left hippocampal volume of the patients with MDD measured using all three methods was significantly smaller than the left hippocampal volume of the normal controls (manual P = 0.029, FreeSurfer P = 0.035, IBASPM P = 0.018). After controlling for the ICV, except for the right hippocampal volume measured using FreeSurfer, both measured hippocampal volumes of the patients with MDD were significantly smaller than the measured hippocampal volumes of the normal controls (right manual P = 0.019, IBASPM P = 0.012; left manual P = 0.003, FreeSurfer P = 0.010, IBASPM P = 0.002),. In the intrarater reliability test, the intraclass correlation coefficients (ICCs) were all excellent (manual right 0.947, left 0.934; FreeSurfer right 1.000, left 1.000; IBASPM right 1.000, left 1.000). In the test of agreement between the volumetric methods, the ICCs were right 0.846 and left 0.848 (manual and FreeSurfer), and right 0.654 and left 0.717 (manual and IBASPM).

Conclusion

The automated hippocampal volumetric methods showed good agreement with manual hippocampal volumetry, but the volume measured using FreeSurfer was 35% larger and the agreement was questionable with IBASPM. Although the automated methods could detect hippocampal atrophy in the patients with MDD, the results indicate that manual hippocampal volumetry is still the gold standard, while the automated volumetric methods need to be improved.

Keywords

Magnetic resonance imaging Hippocampus Volumetry Validation Major depressive disorder 

Notes

Acknowledgement

This study was supported by a research grant from Kangwon National University Hospital.

Conflict of interest statement

We declare that we have no conflict of interest.

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Woo Suk Tae
    • 1
  • Sam Soo Kim
    • 1
    • 2
  • Kang Uk Lee
    • 1
  • Eui-Cheol Nam
    • 1
  • Keun Woo Kim
    • 1
  1. 1.Neuroscience Research InstituteKangwon National University College of MedicineKangwonKorea
  2. 2.Department of RadiologyKangwon National University HospitalKangwon-doKorea

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