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Erschienen in: Neuroradiology 1/2017

29.12.2016 | Functional Neuroradiology

Diagnostic imaging of dementia with Lewy bodies by susceptibility-weighted imaging of nigrosomes versus striatal dopamine transporter single-photon emission computed tomography: a retrospective observational study

verfasst von: Koji Kamagata, Tomoya Nakatsuka, Ryuji Sakakibara, Yohei Tsuyusaki, Tomohiro Takamura, Kanako Sato, Michimasa Suzuki, Masaaki Hori, Kanako K Kumamaru, Tsutomu Inaoka, Shigeki Aoki, Hitoshi Terada

Erschienen in: Neuroradiology | Ausgabe 1/2017

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Abstract

Introduction

The characteristics of dementia with Lewy bodies (DLB), Alzheimer’s disease (AD) and amnestic mild cognitive impairment (a-MCI) overlap but require different treatments; therefore, it is important to differentiate these pathologies. Assessment of dopamine uptake in the striatum using dopamine transporter (DaT) single-photon emission computed tomography (SPECT) is the gold standard for diagnosing DLB; however, this modality is expensive, time consuming and involves radiation exposure. Degeneration of the substantia nigra nigrosome-1, which occurs in DLB, but not in AD/a-MCI, can be identified by 3T susceptibility-weighted imaging (SWI). Therefore, the aim of this retrospective observational study was to compare SWI with DaT-SPECT for differentiation of DLB from AD/a-MCI.

Methods

SWI data were acquired for patients with clinically diagnosed DLB (n = 29), AD (n = 18), a-MCI (n = 13) and healthy controls (n = 26). Images were analysed for nigrosome-1 degeneration. Diagnostic accuracy was evaluated for DLB, AD and a-MCI compared with striatal dopamine uptake using DaT-SPECT.

Results

SWI achieved 90% diagnostic accuracy (93% sensitivity, 87% specificity) for the detection of nigrosome-1 degeneration in DLB and not in AD/a-MCI as compared with 88.3% accuracy (93% sensitivity, 84% specificity) using DaT-SPECT.

Conclusions

SWI nigrosome-1 evaluation was useful in differentiating DLB from AD/a-MCI, with high accuracy. This less invasive and less expensive method is a potential alternative to DaT-SPECT for the diagnosis of DLB.
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Metadaten
Titel
Diagnostic imaging of dementia with Lewy bodies by susceptibility-weighted imaging of nigrosomes versus striatal dopamine transporter single-photon emission computed tomography: a retrospective observational study
verfasst von
Koji Kamagata
Tomoya Nakatsuka
Ryuji Sakakibara
Yohei Tsuyusaki
Tomohiro Takamura
Kanako Sato
Michimasa Suzuki
Masaaki Hori
Kanako K Kumamaru
Tsutomu Inaoka
Shigeki Aoki
Hitoshi Terada
Publikationsdatum
29.12.2016
Verlag
Springer Berlin Heidelberg
Erschienen in
Neuroradiology / Ausgabe 1/2017
Print ISSN: 0028-3940
Elektronische ISSN: 1432-1920
DOI
https://doi.org/10.1007/s00234-016-1773-z

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