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  Comparison of T2*-weighted and QSM contrasts in Parkinson's disease to visualize the STN with MRI

Alkemade, A., de Hollander, G., Keuken, M. C., Schäfer, A., Ott, D. V. M., Schwarz, J., et al. (2017). Comparison of T2*-weighted and QSM contrasts in Parkinson's disease to visualize the STN with MRI. PLoS One, 12(4): e0176130. doi:10.1371/journal.pone.0176130.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-E215-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-F2B2-1
Genre: Journal Article

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 Creators:
Alkemade , Anneke 1, Author
de Hollander, Gilles 1, Author
Keuken, Max C.2, Author              
Schäfer, Andreas3, Author              
Ott, Derek V. M.4, Author              
Schwarz, Johannes1, Author
Weise, David 1, Author
Kotz, Sonja A.5, Author              
Forstmann, Birte U.1, Author              
Affiliations:
1External Organizations, ou_persistent22              
2MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634548              
3Department Neurophysics, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634550              
4Department Neurology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634549              
5Department Neuropsychology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_634551              

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 Abstract: The subthalamic nucleus (STN) plays a crucial role in the surgical treatment of Parkinson’s disease (PD). Studies investigating optimal protocols for STN visualization using state of the art magnetic resonance imaging (MRI) techniques have shown that susceptibility weighted images, which display the magnetic susceptibility distribution, yield better results than T1-weighted, T2-weighted, and T2*-weighted contrasts. However, these findings are based on young healthy individuals, and require validation in elderly individuals and persons suffering from PD. Using 7T MRI, the present study set out to investigate which MRI contrasts yielded the best results for STN visualization in 12 PD patients and age-matched healthy controls (HC). We found that STNs were more difficult to delineate in PD as reflected by a lower inter-rater agreement when compared to HCs. No STN size differences were observed between the groups. Analyses of quantitative susceptibility mapping (QSM) images showed a higher inter-rater agreement reflected by increased Dice-coefficients. The location of the center of mass of the STN was not affected by contrast. Overall, contrast-to-noise ratios (CNR) were higher in QSM than in T2*-weighted images. This can at least partially, explain the higher inter-rater agreement in QSM. The current results indicate that the calculation of QSM contrasts contributes to an improved visualization of the entire STN. We conclude that QSM contrast is the preferred choice for the visualization of the STN in persons with PD as well as in aging HC.

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Language(s): eng - English
 Dates: 2016-08-112017-04-052017-04-19
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1371/journal.pone.0176130
PMC: PMC5397046
PMID: 28423027
Other: eCollection 2017
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Project name : -
Grant ID : KO 2268/6-1
Funding program : -
Funding organization : Deutsche Forschungsgemeinschaft (DFG)
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Funding organization : Brain Foundation of the Netherlands
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Grant ID : -
Funding program : Starter Grant
Funding organization : European Commission (EC)
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Funding program : Vidi grant
Funding organization : Netherlands Organisation for Scientific Research (NWO)

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Title: PLoS One
Source Genre: Journal
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Publ. Info: San Francisco, CA : Public Library of Science
Pages: - Volume / Issue: 12 (4) Sequence Number: e0176130 Start / End Page: - Identifier: ISSN: 1932-6203
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000277850