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Estimating Accurate Target Coordinates with Magnetic Resonance Images by Using Multiple Phase-Encoding Directions during Acquisition

Authors
 Minsoo Kim  ;  Na Young Jung  ;  Chang Kyu Park  ;  Won Seok Chang  ;  Hyun Ho Jung  ;  Jin Woo Chang 
Citation
 STEREOTACTIC AND FUNCTIONAL NEUROSURGERY, Vol.96(2) : 113-119, 2018 
Journal Title
STEREOTACTIC AND FUNCTIONAL NEUROSURGERY
ISSN
 1011-6125 
Issue Date
2018
MeSH
Adult ; Aged ; Brain / diagnostic imaging* ; Deep Brain Stimulation / methods ; Deep Brain Stimulation / standards ; Female ; Humans ; Magnetic Resonance Imaging / methods* ; Magnetic Resonance Imaging / standards ; Male ; Middle Aged ; Prospective Studies ; Stereotaxic Techniques* / standards ; Tomography, X-Ray Computed / methods* ; Tomography, X-Ray Computed / standards
Keywords
Deep brain stimulation ; Magnetic resonance imaging ; Signal processing ; Stereotactic techniques
Abstract
Background: Stereotactic procedures are image guided, often using magnetic resonance (MR) images limited by image distortion, which may influence targets for stereotactic procedures.

Objectives: The aim of this work was to assess methods of identifying target coordinates for stereotactic procedures with MR in multiple phase-encoding directions.

Methods: In 30 patients undergoing deep brain stimulation, we acquired 5 image sets: stereotactic brain computed tomography (CT), T2-weighted images (T2WI), and T1WI in both right-to-left (RL) and anterior-to-posterior (AP) phase-encoding directions. Using CT coordinates as a reference, we analyzed anterior commissure and posterior commissure coordinates to identify any distortion relating to phase-encoding direction.

Results: Compared with CT coordinates, RL-directed images had more positive x-axis values (0.51 mm in T1WI, 0.58 mm in T2WI). AP-directed images had more negative y-axis values (0.44 mm in T1WI, 0.59 mm in T2WI). We adopted 2 methods to predict CT coordinates with MR image sets: parallel translation and selective choice of axes according to phase-encoding direction. Both were equally effective at predicting CT coordinates using only MR; however, the latter may be easier to use in clinical settings.

Conclusion: Acquiring MR in multiple phase-encoding directions and selecting axes according to the phase-encoding direction allows identification of more accurate coordinates for stereotactic procedures.
Full Text
https://www.karger.com/Article/FullText/488396
DOI
10.1159/000488396
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Neurosurgery (신경외과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Minsoo(김민수)
Park, Chang Kyu(박창규)
Chang, Won Seok(장원석) ORCID logo https://orcid.org/0000-0003-3145-4016
Chang, Jin Woo(장진우) ORCID logo https://orcid.org/0000-0002-2717-0101
Jung, Na Young(정나영)
Jung, Hyun Ho(정현호)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/188955
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