scholarly journals Direct Targeting of the Anterior Nucleus of the Thalamus via 3 T Quantitative Susceptibility Mapping

2021 ◽  
Vol 15 ◽  
Author(s):  
Kaijia Yu ◽  
Zhiwei Ren ◽  
Tao Yu ◽  
Xueyuan Wang ◽  
Yongsheng Hu ◽  
...  

Objective: Deep brain stimulation (DBS) of the anterior nucleus of the thalamus (ANT) is a potentially effective, minimally invasive, and reversible method for treating epilepsy. The goal of this study was to explore whether 3 T quantitative susceptibility mapping (QSM) could delineate the ANT from surrounding structures, which is important for the direct targeting of DBS surgery.Methods: We obtained 3 T QSM, T1-weighted (T1w), and T2-weighted (T2w) images from 11 patients with Parkinson’s disease or dystonia who received subthalamic nucleus (STN) or globus pallidus interna (GPi) DBS surgery in our center. The ANT and its surrounding white matter structures on QSM were compared with available atlases. The contrast-to-noise ratios (CNRs) of ANT relative to the external medullary lamina (eml) were compared across the three imaging modalities. Additionally, the morphology and location of the ANT were depicted in the anterior commissure (AC)-posterior commissure (PC)-based system.Results: ANT can be clearly distinguished from the surrounding white matter laminas and appeared hyperintense on QSM. The CNRs of the ANT-eml on QSM, T1w, and T2w images were 10.20 ± 4.23, 1.71 ± 1.03, and 1.35 ± 0.70, respectively. One-way analysis of variance (ANOVA) indicated significant differences in CNRs among QSM, T1w, and T2w imaging modalities [F(2) = 85.28, p < 0.0001]. In addition, both the morphology and location of the ANT were highly variable between patients in the AC–PC-based system.Conclusion: The potential utility of QSM for the visualization of ANTs in clinical imaging is promising and may be suitable for targeting the ANT for DBS to treat epilepsy.

2016 ◽  
Vol 124 (1) ◽  
pp. 96-105 ◽  
Author(s):  
Arjun S. Chandran ◽  
Michael Bynevelt ◽  
Christopher R. P. Lind

The subthalamic nucleus (STN) is one of the most important stereotactic targets in neurosurgery, and its accurate imaging is crucial. With improving MRI sequences there is impetus for direct targeting of the STN. High-quality, distortion-free images are paramount. Image reconstruction techniques appear to show the greatest promise in balancing the issue of geometrical distortion and STN edge detection. Existing spin echo- and susceptibility-based MRI sequences are compared with new image reconstruction methods. Quantitative susceptibility mapping is the most promising technique for stereotactic imaging of the STN.


2018 ◽  
Vol 13 (1) ◽  
pp. 220-231 ◽  
Author(s):  
Xiaojun Guan ◽  
Peiyu Huang ◽  
Qiaoling Zeng ◽  
Chunlei Liu ◽  
Hongjiang Wei ◽  
...  

2014 ◽  
Vol 74 (2) ◽  
pp. 564-570 ◽  
Author(s):  
Cynthia Wisnieff ◽  
Sriram Ramanan ◽  
John Olesik ◽  
Susan Gauthier ◽  
Yi Wang ◽  
...  

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