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3D fat-suppressed T1-weighted volume isotropic turbo spin-echo acquisition (VISTA) imaging for the evaluation of the ectopic posterior pituitary gland

Authors
  • Azuma, Minako1
  • Kadota, Yoshihito1
  • Matsuyama, Misayo1
  • Moritake, Hiroshi1
  • Hirai, Toshinori2
  • 1 University of Miyazaki, Miyazaki, Japan , Miyazaki (Japan)
  • 2 Kumamoto University, Kumamoto, Japan , Kumamoto (Japan)
Type
Published Article
Journal
Japanese Journal of Radiology
Publisher
Springer Singapore
Publication Date
Apr 16, 2021
Volume
39
Issue
6
Pages
564–570
Identifiers
DOI: 10.1007/s11604-020-01076-3
Source
Springer Nature
Keywords
License
Yellow

Abstract

ObjectiveWe evaluated the usefulness of fat-suppressed three-dimensional T1-weighted volume isotropic turbo spin-echo acquisition (FS 3D T1W-VISTA) imaging for the evaluation of the ectopic posterior pituitary gland (EPPG).Materials and methodsThis retrospective study included 9 patients with EPPG due to causes other than tumor. All underwent sagittal two-dimensional (2D) T1W-, FS 3D T1W-VISTA- (VISTA), and 3D T2W-driven equilibrium radiofrequency reset pulse (DRIVE) imaging. Two radiologists independently reviewed the 2D T1W- and VISTA images for their image quality and for visualization of the EPPG and of pituitary stalk transection. DRIVE findings were used as the reference standard for pituitary stalk transection. Interobserver and intermodality agreements were evaluated with the kappa (κ) coefficient. The mean grade assigned to the 2D T1W- and the VISTA imaging technique for visualization of the EPPG was assessed by the Mann–Whitney U test.ResultsInterobserver agreement for visualization of the EPPG on 2D T1W- and VISTA images was excellent (κ = 0.82 and κ = 1.00, respectively). The mean grade for EPPG visualization was significantly higher for VISTA- than 2D T1W images (p = 0.0039).ConclusionFS 3D T1W-VISTA imaging is useful for the evaluation of EPPG.A secondary abstractConventional MRI yields insufficient information for the evaluation of the ectopic posterior pituitary gland (EPPG). The visualization of the EPPG was significantly higher for fat-suppressed three-dimensional T1-weighted volume isotropic turbo spin-echo acquisition (FS 3D T1W-VISTA) than 2D T1W images. FS 3D T1W-VISTA imaging is useful for the evaluation of the EPPG.

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