Evaluation of pulse sequences used for magnetic resonance sialography

M. Sakamoto, T. Sasano, S. Higano, S. Takahashi, T. Nagasaka, I. Yanagawa, Y. Hosogai, H. Tamura, M. Iikubo, N. Shoji

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Objectives: To determine the most appropriate sequences for the visualization of small parotid ducts in MR sialography. Methods: MR images of a phantom consisting of distilled water in polyethylene tubes were obtained with turbo-spin echo (TSE), single-shot turbo-spin echo (SSTSE), half-fourier acquisition, single-shot turbo-spin echo (HASTE) and turbo gradient-spin echo (TGSE) pulse sequences and compared visually and quantitatively. MR sialograms obtained from healthy volunteers and patients with Sjögren's syndrome (SS) were obtained using the same four sequences. Results: In the phantom, TSE images were best and the contrast-noise ratio (CNR) highest. In the volunteers, the main ducts were especially clearly visualized with TSE and in SSTSE; however, the majority of secondary and/or tertiary parotid ducts were not depicted by any of the sequences used. In SS patients, images of small main ducts and small pseudocysts were clearer using TSE. However, TSE could not depict the narrow main ducts or peripheral ducts or very small pseudocysts. Conclusions: TSE is considered the most suitable MR sequence for assessing small parotid gland ducts. However, further improvement is needed since it does not always visualize them sufficiently.

Original languageEnglish
Pages (from-to)276-284
Number of pages9
JournalDentomaxillofacial Radiology
Volume30
Issue number5
DOIs
Publication statusPublished - 2001

Keywords

  • Magnetic resonance imaging
  • Salivary gland diseases
  • Sialography
  • Sjögren-Larsson syndrome

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Radiology Nuclear Medicine and imaging
  • Dentistry(all)

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