Related Experiment Video
Updated: Dec 17, 2025
05:14
Standardized Data Acquisition for Neuromelanin-Sensitive Magnetic Resonance Imaging of the Substantia Nigra
Published on: September 8, 2021
4.3K
[Method for Quantitative Evaluation of the Substantia Nigra Using Phase-sensitive Inversion Recovery in 1.5 T
Tomohisa Doi1, Yasuhiro Fujiwara2, Hirotoshi Maruyama3
1Graduate School of Health Sciences, Kumamoto University.
Nihon Hoshasen Gijutsu Gakkai Zasshi
|June 23, 2020
Summary
Phase-sensitive inversion recovery (PSIR) at 1.5 T allows for quantitative evaluation of the substantia nigra (SN). This method accurately measures SN T1 values and area, offering potential for improved Parkinson's disease assessment.
Area of Science:
- Neuroimaging
- Quantitative MRI
- Neurodegenerative Diseases
Background:
- Parkinson's disease involves substantia nigra (SN) degeneration.
- Standard MRI and neuro-melanin imaging (NMI) have limitations for SN evaluation.
- Quantitative SN assessment is needed for improved diagnosis.
Purpose of the Study:
- To investigate quantitative evaluation of the substantia nigra (SN) using phase-sensitive inversion recovery (PSIR) at 1.5 T.
- To assess the accuracy of T1 values measured by PSIR.
- To determine if SN area can be quantitatively measured.
Main Methods:
- Phantom study to verify T1 accuracy of PSIR.
- PSIR imaging of healthy volunteers.
- Measurement of SN T1 values and area in volunteers.
Main Results:
- PSIR T1 accuracy was within ±10% of inversion recovery spin-echo for relevant T1 ranges.
- Measured SN T1 values by PSIR showed only 1.1% difference from reported values.
- SN area measurement using PSIR was independent of imaging parameters when referenced by T1 value.
Conclusions:
- PSIR at 1.5 T enables quantitative evaluation of the substantia nigra.
- Measuring SN area and T1 value with PSIR shows potential for clinical application.
- This technique may aid in the assessment of neurodegenerative diseases affecting the SN.
