Appearance of the Organum Vasculosum of the Lamina Terminalis on Contrast-enhanced MR Imaging
-
- Naganawa Shinji
- Department of Radiology, Nagoya University Graduate School of Medicine
-
- Taoka Toshiaki
- Department of Radiology, Nagoya University Graduate School of Medicine
-
- Kawai Hisashi
- Department of Radiology, Nagoya University Graduate School of Medicine
-
- Yamazaki Masahiro
- Department of Radiology, Nagoya University Graduate School of Medicine
-
- Suzuki Kojiro
- Department of Radiology, Nagoya University Graduate School of Medicine Department of Radiology, Aichi Medical University, Aichi, Japan
この論文をさがす
抄録
<p>Purpose: Circumventricular organs (CVOs) lack a blood brain barrier and are also called “brain windows”. Among CVOs, the organum vasculosum of the lamina terminalis (OVLT) is an osmotic regulator involved in the release of vasopressin. In a previous study of healthy subjects, it was reported that contrast enhancement in the OVLT can be recognized in only 34% of 3 Tesla thin slice contrast-enhanced T1-weighted images. The purpose of this study was to evaluate the leakage of gadolinium contrast from the OVLT in healthy subjects using heavily T2-weighted three dimensional-fluid attenuated inversion recovery (3D-FLAIR) (HF) imaging.</p><p>Methods: Eight healthy male subjects were included in this study. A standard dose (0.1 mmol/kg) of gadoteridol was intravenously administered. Magnetic resonance cisternography (MRC) and HF were obtained before and 0.5, 1.5, 3, 4.5 and 6 h after the injection. Enhancement of the OVLT including the surrounding cerebral spinal fluid (CSF) was measured by manually drawing a rectangular ROI centered on the OVLT. The ROI was copied to the HF image and the signal intensity was measured. The signal intensity ratio (SIR) was obtained by dividing the signal intensity value of the OVLT ROI by that of the midbrain.</p><p>Results: The differences between the mean SIR at pre-contrast and those at 0.5, 1.5, 3, 4.5, and 6 h were significant (P < 0.05). The mean SIR at 0.5 h was higher than those at all other time points (P < 0.05).</p><p>Conclusion: Using HF imaging, enhancement around the OVLT was observed in all subjects at 0.5 h after intravenous administration of single dose gadoteridol.</p>
収録刊行物
-
- Magnetic Resonance in Medical Sciences
-
Magnetic Resonance in Medical Sciences 17 (2), 132-137, 2018
日本磁気共鳴医学会