Anna Ringheim
GE Healthcare
10 Papers
42 Citations
Anna Ringheim is an academic researcher from GE Healthcare. The author has contributed to research in topics: Reference Region & Cerebellar cortex. The author has an hindex of 7, co-authored 10 publications.
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Papers
PET imaging of amyloid deposition in patients with mild cognitive impairment
Anton Forsberg,Henry Engler,Ove Almkvist,Ove Almkvist,Ove Almkvist,Gunnar Blomquist,Göran Hagman,Anders Wall,Anna Ringheim,Bengt Langstrom,Bengt Langstrom,Agneta Nordberg,Agneta Nordberg +12 more
TL;DR: Correlations were observed in the MCI patients between PIB retention and CSF Abeta(1-42), total Tau and episodic memory, respectively, and the P IB retention in MCI converters was comparable to AD patients.
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An automated method for delineating a reference region using masked volumewise principal-component analysis in 11C-PIB PET.
TL;DR: A fast and automated method to delineate the reference region of images obtained from an N-methyl-11C-2-(4′-methylaminophenyl)-6-hydroxy-benzothiazole 11C-PIB PET study on Alzheimer disease patients and healthy controls using a newly introduced masked volumewise principal-component analysis is introduced.
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Principal component analysis with pre-normalization improves the signal-to-noise ratio and image quality in positron emission tomography studies of amyloid deposits in Alzheimer's disease
Pasha Razifar,Henry Engler,Gunnar Blomquist,Anna Ringheim,Sergio Estrada,Bengt Långström,Mats Bergström +6 more
TL;DR: A new approach for the application of principal component analysis (PCA) with pre-normalization on dynamic positron emission tomography (PET) images with enhanced contrast and improved signal-to-noise ratio (SNR) and discrimination power (DP) compared to summed images and parametric images.
14
Patent
Method and system for outlining a region in positron emission tomography studies
Pasha Razifar,Anna Ringheim,Bengt Långström,Henry Engler,Anders Wall +4 more
- 25 Oct 2007
TL;DR: In this article, a method and system for outlining a region of interest in a Positron Emission Tomography (PET) scan study is presented. But the method is limited to a single image.
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Masked-Volume-Wise PCA and "reference Logan" illustrate similar regional differences in kinetic behavior in human brain PET study using [11C]-PIB
TL;DR: MVW-PCA is a potential multivariate method that without modeling assumptions generates high quality images, which illustrated similar regional changes compared to modeling methods such as reference Logan.