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Statistical Parametric Mapping of 99mTc-ECD SPECT in Idiopathic Parkinson’s Disease and Multiple System Atrophy with Predominant Parkinsonian Features: Correlation with Clinical Parameters

Koen Van Laere, MD, PhD, DrSc1, Patrick Santens, MD, PhD2, Tommy Bosman, MD2, Jacques De Reuck, MD, PhD2, Luc Mortelmans, MD, PhD1 and Rudi Dierckx, MD, PhD3

1 Division of Nuclear Medicine, Leuven University Hospital, Leuven, Belgium
2 Department of Neurology, Ghent University Hospital, Ghent, Belgium
3 Division of Nuclear Medicine, Ghent University Hospital, Ghent, Belgium



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  		FIGURE 1. SPM maps of difference in 99mTc-ECD uptake between IPD patients, MSA patients, and healthy volunteers. Clusters are superimposed on a T1-weighted MR template constructed from healthy subjects in study. (A) IPD vs. healthy volunteers. (B) MSA vs. healthy volunteers. (C) MSA vs. IPD. Corr = corrected; uncorr = uncorrected.

 


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  		FIGURE 2. (A and B) SPM glass brain maps of difference in 99mTc-ECD uptake between IPD patients with disease of short (<5 y; A) and long (5–20 y; B) duration vs. healthy volunteers show contrast for decreased perfusion in patients. (C and D) SPM glass brain maps of difference in 99mTc-ECD uptake between IPD patients with disease of short (<5 y) and long (5–20 y) duration. (C) Contrast for relatively decreased perfusion in long-duration patients. (D) Contrast for relatively increased perfusion in long-duration patients.

 


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  		FIGURE 3. SPM maps of correlation analysis between regional 99mTc-ECD uptake in MSA and IPD patients vs. equivalent amount of dopamine agonist taken at time of SPECT study. Clusters are superimposed on T1-weighted MR template constructed from healthy subjects in study. Uncorr = uncorrected.

 


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  		FIGURE 4. SPM maps of correlation analysis between regional 99mTc-ECD uptake in IPD patients vs. semiquantitative cognitive performance at time of SPECT study. Clusters are superimposed on T1-weighted MR template constructed from healthy subjects in study. – = negative correlation; + = positive correlation.

 




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