Automated Segmentation of Cortical Grey Matter from T1-Weighted MRI Images

Eileanoir B. Johnson; Rachael I. Scahill; Sarah J. Tabrizi

doi:10.3791/58198

Automated Segmentation of Cortical Grey Matter from T1-Weighted MRI Images

JoVE Journal
Neuroscience

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JoVE Journal Neuroscience

Automated Segmentation of Cortical Grey Matter from T1-Weighted MRI Images

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06:48 min

January 7, 2019

DOI: 10.3791/58198-v

Eileanoir B. Johnson¹, Rachael I. Scahill¹, Sarah J. Tabrizi¹

¹Huntington's Disease Research Centre,UCL Institute of Neurology

Overview

This protocol outlines a method for applying seven different automated segmentation tools to structural T1-weighted MRI scans. The goal is to delineate grey matter regions, facilitating the quantification of grey matter volume, which can aid in understanding group differences in cortical volume between non-clinical and clinical populations.

Key Study Components

Area of Science

Neuroimaging
Neurology
Brain segmentation analysis

Background

Investigates cortical volume differences across populations.
Utilizes automated segmentation techniques for efficiency.
Emphasizes the importance of Visual Quality Control for accuracy.
Demonstrates segmentation performance of various tools.

Purpose of Study

To provide a reliable method for quantifying grey matter volume.
To facilitate non-invasive monitoring of brain volume changes.
To compare segmentation outcomes of multiple tools for precision.

Methods Used

SPM software in MATLAB is used for segmentation tasks.
T1-weighted MRI scans serve as the primary data source.
Multiple segmentation techniques are tested for efficiency.
Visual Quality Control protocols are applied to validate results.

Main Results

Found variability in segmentation accuracy across different tools.
Emphasized the necessity of performing Visual Quality Control.
Noted specific instances of successful and unsuccessful regional delineation.
Concluded that careful testing of tools influences quality outcomes.

Conclusions

Demonstrates a comprehensive approach to grey matter volume quantification.
Highlights the importance of tool selection and quality control.
Provides groundwork for future research on brain volume changes without invasive methods.

Frequently Asked Questions

What are the advantages of this segmentation method?

This method offers automated processing, enabling multiple scans to be analyzed efficiently and with precision, reducing human error.

How is Visual Quality Control implemented?

Visual Quality Control involves comparing segmented regions against original scans to ensure accurate delineation, which is essential for reliable results.

What is the significance of using SPM software?

SPM software provides a robust platform for neuroimaging analysis, facilitating segmentation tasks and enabling the use of various automated tools.

How do differences in tool performance affect research outcomes?

Differences in segmentation tool accuracy can impact the biological conclusions drawn from the data, emphasizing the need for careful methodology selection.

Can this method be adapted for other types of imaging?

While optimized for T1-weighted MRI scans, the principles of this segmentation approach can be adapted for other imaging modalities with proper calibration.

What limitations should researchers consider?

Researchers must account for potential biases in segmentation accuracy and the importance of thorough Visual Quality Control to address any inconsistencies.

This protocol describes the process of applying seven different automated segmentation tools to structural T1-weighted MRI scans to delineate grey matter regions that can be used for the quantification of grey matter volume.

This method can answer key questions in the neuroimaging and neurology fields. Such as, whether there are group differences in cortical volume for non-clinical versus clinical populations. The main advantage to this technique is that it enables researchers to use the best tool for their data.

To begin, first open the SPM software by opening a MATLAB command window and typing SPM into the command line. Then, to perform unified segmentation, select PET VBM to open the structural MRI toolbox. Now, open the batch editor to perform segmentation on multiple scans at once.

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