AI Article Synopsis
- This study compared the visibility of the subthalamic nucleus (STN) in two types of MRI images: fast spin-echo T2-weighted (FSE T2-W) and fast short inversion time inversion-recovery (FSTIR), focusing on normal adult subjects.
- Results showed that the FSTIR images provided better visibility of the lower margin of the STN, while the FSE T2-W images were better for other margins, and the signal intensity differences were notably greater on FSTIR images.
- The study found that as age increases, the position of the STN shifts laterally, which is important for accurate targeting in deep brain stimulation treatments.
Article Abstract
Introduction: The purpose of this study was to compare the visibility of the normal subthalamic nucleus (STN) between fast spin-echo T2-weighted (FSE T2-W) images and fast short inversion time inversion-recovery (FSTIR) images, and to assess the age-related changes of the STN at 3.0 T.
Methods: We evaluated high-resolution FSE T2-W and FSTIR images in 24 neurologically normal subjects. Using both sequences, we assessed the visibility of the margins of the STN, and calculated the difference in signal intensity between the STN and structures adjacent to the STN. Then, to assess the age-related changes of the STN, we calculated the contrast-to-noise ratio between the STN and the white matter, and measured the position, length, and height of the STN. All data were statistically evaluated.
Results: The visibility of the lower margin of the STN was significantly better on the FSTIR images than on the FSE T2-W images (P = 0.0001), while the visibility of other margins was significantly better on the FSE T2-W images than on the FSTIR mages (P = 0.002). The difference in signal intensity between the STN and substantia nigra was significantly greater on the FSTIR images than on the FSE T2-W images (P < 0.0001). The distance from the midline to the lateral border of the STN increased with age (FSE T2-W images: left r = 0.4916, P = 0.015; right r = 0.4442, P = 0.030).
Conclusion: The combined reading of both FSE T2-W and FSTIR images at 3 T will improve the identification of the STN. The age-related positional change of the STN should be considered in target determination for deep brain stimulation procedures.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s00234-008-0388-4 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Variation in the MRI signal intensity of naturally occurring equine superficial digital flexor tendinopathies over a 12-month period.
Vet Rec
October 2020
Institute for Veterinary Physiology, University of Leipzig Faculty of Veterinary Medicine, Leipzig, Sachsen, Germany.
Background: Signal intensity (SI) of equine tendinopathies in MRI differs between the superficial digital flexor tendon (SDFT) and the deep digital flexor tendon (DDFT). In DDFT lesions, short tau inversion recovery (STIR) SI decreases earlier than T2-weighted (T2w) SI, while the latter decreases earlier in SDFT lesions, but long-term results using STIR sequences are lacking.
Methods: Standing MRI of eight horses with naturally occurring SDFT lesions was performed at the day of treatment as well as 2, 6 and 12 months after treatment.
Comparison of FSE T2 W PROPELLER and 3D-FIESTA of 3 T MR for the internal auditory canal.
Clin Imaging
April 2018
Department of Radiology, Peking University Third Hospital.
Objective: The study compared the use of periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) technique fast spin echo (FSE) T2 W and the sequence of three-dimensional fast imaging employing steady-state acquisition (3D-FIESTA) technique in the MRI of the internal auditory canal for overall image quality improvement.
Materials And Methods: One hundred thirty-two patients undergoing FSE T2 W PROPELLER and 3D-FIESTA examinations of the internal auditory canal were included. All examinations were performed at 3.
Accuracy of SWI sequences compared to T2*-weighted gradient echo sequences in the detection of cerebral cavernous malformations in the familial form.
Neuroradiol J
October 2016
Department of Radiology, University of Palermo, Palermo, Italy.
Purpose: The purpose of this study was to assess the accuracy of susceptibility-weighted imaging (SWI), compared with T2*-weighted gradient echo (GRE) imaging in assessing cerebral cavernous malformations.
Materials And Methods: We retrospectively evaluated 21 patients with a familial form of cavernous malformation. Magnetic resonance (MR) protocol included non-enhanced and contrast-enhanced fast-spin echo (FSE) T1-weighted sequences, FSE T2-weighted sequences, fluid-attenuated inversion-recovery (FLAIR), GRE T2*-weighted and SWI sequences.
Background: Improved motion-sensitized driven-equilibrium (iMSDE) preparations have been successfully used in carotid artery wall imaging to achieve blood suppression, but it causes notable signal loss, mostly due to inherent T2 decay, eddy current effects and B1 + inhomogeneity. In this study, we investigate the signal to noise ratio (SNR) and blood suppression performance of iMSDE using composite RF pulses and sinusoidal gradients. Optimized first moment (m1) values for iMSDE prepared T1- and T2- weighted (T1- and T2-w) imaging are presented.
View Article and Find Full Text PDFImage domain propeller fast spin echo.
Magn Reson Imaging
April 2013
Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden; Department of Neuroradiology, Karolinska University Hospital, Stockholm, Sweden.
A new pulse sequence for high-resolution T2-weighted (T2-w) imaging is proposed - image domain propeller fast spin echo (iProp-FSE). Similar to the T2-w PROPELLER sequence, iProp-FSE acquires data in a segmented fashion, as blades that are acquired in multiple TRs. However, the iProp-FSE blades are formed in the image domain instead of in the k-space domain.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!