Abstract
Purpose
Phase difference enhanced (PADRE) imaging can enhance myelin density and delineate the superior cerebellar peduncle (SCP). We aimed to determine if SCP atrophy was distinguishable on PADRE imaging and evaluate its diagnostic performance compared with previous MRI progressive supranuclear palsy (PSP) findings.
Methods
Two reviewers measured the SCP widths on PADRE in 20 PSP and 31 Parkinson’s disease (PD) patients. The SCP and middle cerebellar peduncle (MCP) widths and the pons and midbrain areas were measured on 3D-T1WI, and the ratio of the area of the pons to the area of the midbrain, the MCP/SCP ratio, and the magnetic resonance parkinsonism index (MRPI) were calculated. We used the Steel–Dwass test to compare PSP, PD, and HS, and receiver operating characteristic curve (ROC) analyses to assess the sensitivity and specificity for diagnosing PSP from PD. A comparison of ROC curves was performed between the SCP on PADRE and these 3D-T1WI parameters.
Results
In radiologist 1, the SCP on PADRE in PSP (1.1 ± 0.3 mm) was significantly smaller than those in PD (2.4 ± 0.4 mm) (P < 0.001); the area under the curve (AUC) was 0.97. At a 1.75-mm cutoff value, the diagnostic sensitivity and specificity for differentiating PSP from PD were 93.5% and 100%, respectively. The AUC of the SCP on PADRE was significantly higher than the 3D-T1WI parameters (the SCP, MCP, pons area, MCP/SCP ratio, and MRPI).
Conclusion
Assessing SCP with PADRE imaging may yield high diagnostic accuracy for discriminating PSP from PD.
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Data availability
The datasets generated and/or analyzed during the current study are not publicly available due to the anonymity of the patients but are available from the corresponding author at reasonable request.
Abbreviations
- HS:
-
Healthy subjects
- MCP:
-
Middle cerebellar peduncles
- MRPI:
-
The magnetic resonance parkinsonism index
- MSA:
-
Multiple system atrophy
- PADRE:
-
Phase difference enhanced imaging
- PD:
-
Parkinson’s disease
- P/M ratio:
-
The area of the pons to the area of the midbrain
- PSP:
-
Progressive supranuclear palsy
- PSP-CBS:
-
PSP-corticobasal syndrome
- PSP-PGF:
-
PSP-progressive gait freezing
- PSP-P:
-
PSP-parkinsonism
- PSP-RS:
-
PSP-Richardson’s syndrome (PSP-RS)
- SCP:
-
Superior cerebellar peduncle
- TE:
-
Echo times
- 3D-T1W1:
-
Three-dimensional T1-weighted images
- vPSP:
-
Variant PSP phenotypes
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M.M., S.K., and Y.K. planned and designed the study and wrote the manuscript. T.Y. and S.I. analyzed the data. H.A. and K.O. collected study participants and clinical date. All authors reviewed the manuscript.
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Conflict of interest
This work was supported in part by grants-in-aid from the Japan Society for the Promotion of Science (JSPS) KAKENHI 19K17182 to Mari Miyata (managed at Juntendo University).
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This study protocol was approved by the Institutional Review Board at the University of Occupational and Environmental Health School of Medicine (Kitakyushu, Fukuoka, Japan, UOEHCRB22-013) and was conducted in accordance with the Declaration of Helsinki. Imaging and clinical data were retrospectively acquired from 20 patients with PSP, 31 patients with PD and 20 healthy subjects.
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The Ethics Committee of the University of Occupational and Environmental Health granted a permission to use the retrospective data in the study without individual informed consent.
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Miyata, M., Kakeda, S., Yoneda, T. et al. Superior cerebellar peduncle atrophy of progressive supranuclear palsy on phase difference enhanced imaging: a comparison with Parkinson’s disease. Neuroradiology 65, 719–727 (2023). https://doi.org/10.1007/s00234-023-03119-8
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DOI: https://doi.org/10.1007/s00234-023-03119-8