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Perfusion-like template and standardized normalization-based brain image analysis using 18F-florbetapir (AV-45/Amyvid) PET.
Eur J Nucl Med Mol Imaging 2013; 40(6):908-20EJ

Abstract

PURPOSE

Amyloid positron emission tomography (PET) is an important noninvasive method for detecting amyloid burden in Alzheimer's disease (AD) patients. As amyloid PET images have limited anatomical information, magnetic resonance (MR) imaging is usually acquired to perform reliable spatial normalization needed for large-scale analysis. This work proposed and evaluated the performance of new MR-free spatial normalization methods using a perfusion-like template for amyloid PET imaging.

METHODS

Amyloid PET and MR images were collected in 35 subjects (cohort 1: 8 AD patients and 6 controls; cohort 2: 15 AD patients and 6 controls). Three ligand-related templates (AD, control, mixed group) and a perfusion-like template (pAV-45) from early time frames of amyloid PET images were constructed from cohort 1. The variations of (18)F-AV-45 standardized uptake value ratios (SUVRs) among AD patients, controls, and all subjects were tested with repeated two-way (template × brain region) analysis of variance (ANOVA) in cohort 2. (18)F-AV-45 SUVRs by region of interest analysis and voxelwise analysis between MR-based and MR-free approaches were compared and correlated to clinical and image parameters. Effect size (group mean SUVR difference between AD and control/standard deviation) was also evaluated for each template method.

RESULTS

Significantly different (18)F-AV-45 SUVRs between MR-free spatial normalization and MR-based reference images were found among AD patients, controls, and all subjects by the effect of template and brain regions. The highest correlation (r=0.991) of (18)F-AV-45 SUVR to MR-based reference was found in the pAV-45 group. The SUVR percentage difference to MR-based reference showed the least variation and bias (control: -1.31±3.47 %; AD: -0.36±2.50 %) in the pAV-45 group as well. The voxelwise analysis showed the smallest t statistic value in pAV-45 followed by mixed, control, and AD groups when compared to MR-based reference images. Moreover, an overall larger effect size but compatible to that of MR-based reference result was observed in the pAV-45 group as compared to those of the other MR-free template.

CONCLUSION

The novel MR-free template based on the early-phase perfusion images pAV-45 approach for amyloid imaging showed significantly better performance in quantitation accuracy, effect size, and stability when compared with other MR-free PET templates and thus has potential for large-scale clinical applications.

Authors+Show Affiliations

Department of Medical Imaging and Radiological Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan. ihsiao@mail.cgu.edu.twNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23412134

Citation

Hsiao, Ing-Tsung, et al. "Perfusion-like Template and Standardized Normalization-based Brain Image Analysis Using 18F-florbetapir (AV-45/Amyvid) PET." European Journal of Nuclear Medicine and Molecular Imaging, vol. 40, no. 6, 2013, pp. 908-20.
Hsiao IT, Huang CC, Hsieh CJ, et al. Perfusion-like template and standardized normalization-based brain image analysis using 18F-florbetapir (AV-45/Amyvid) PET. Eur J Nucl Med Mol Imaging. 2013;40(6):908-20.
Hsiao, I. T., Huang, C. C., Hsieh, C. J., Wey, S. P., Kung, M. P., Yen, T. C., & Lin, K. J. (2013). Perfusion-like template and standardized normalization-based brain image analysis using 18F-florbetapir (AV-45/Amyvid) PET. European Journal of Nuclear Medicine and Molecular Imaging, 40(6), pp. 908-20. doi:10.1007/s00259-013-2350-x.
Hsiao IT, et al. Perfusion-like Template and Standardized Normalization-based Brain Image Analysis Using 18F-florbetapir (AV-45/Amyvid) PET. Eur J Nucl Med Mol Imaging. 2013;40(6):908-20. PubMed PMID: 23412134.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Perfusion-like template and standardized normalization-based brain image analysis using 18F-florbetapir (AV-45/Amyvid) PET. AU - Hsiao,Ing-Tsung, AU - Huang,Chin-Chang, AU - Hsieh,Chia-Ju, AU - Wey,Shiaw-Pyng, AU - Kung,Mei-Ping, AU - Yen,Tzu-Chen, AU - Lin,Kun-Ju, Y1 - 2013/02/15/ PY - 2012/08/21/received PY - 2013/01/14/accepted PY - 2013/2/16/entrez PY - 2013/2/16/pubmed PY - 2013/12/24/medline SP - 908 EP - 20 JF - European journal of nuclear medicine and molecular imaging JO - Eur. J. Nucl. Med. Mol. Imaging VL - 40 IS - 6 N2 - PURPOSE: Amyloid positron emission tomography (PET) is an important noninvasive method for detecting amyloid burden in Alzheimer's disease (AD) patients. As amyloid PET images have limited anatomical information, magnetic resonance (MR) imaging is usually acquired to perform reliable spatial normalization needed for large-scale analysis. This work proposed and evaluated the performance of new MR-free spatial normalization methods using a perfusion-like template for amyloid PET imaging. METHODS: Amyloid PET and MR images were collected in 35 subjects (cohort 1: 8 AD patients and 6 controls; cohort 2: 15 AD patients and 6 controls). Three ligand-related templates (AD, control, mixed group) and a perfusion-like template (pAV-45) from early time frames of amyloid PET images were constructed from cohort 1. The variations of (18)F-AV-45 standardized uptake value ratios (SUVRs) among AD patients, controls, and all subjects were tested with repeated two-way (template × brain region) analysis of variance (ANOVA) in cohort 2. (18)F-AV-45 SUVRs by region of interest analysis and voxelwise analysis between MR-based and MR-free approaches were compared and correlated to clinical and image parameters. Effect size (group mean SUVR difference between AD and control/standard deviation) was also evaluated for each template method. RESULTS: Significantly different (18)F-AV-45 SUVRs between MR-free spatial normalization and MR-based reference images were found among AD patients, controls, and all subjects by the effect of template and brain regions. The highest correlation (r=0.991) of (18)F-AV-45 SUVR to MR-based reference was found in the pAV-45 group. The SUVR percentage difference to MR-based reference showed the least variation and bias (control: -1.31±3.47 %; AD: -0.36±2.50 %) in the pAV-45 group as well. The voxelwise analysis showed the smallest t statistic value in pAV-45 followed by mixed, control, and AD groups when compared to MR-based reference images. Moreover, an overall larger effect size but compatible to that of MR-based reference result was observed in the pAV-45 group as compared to those of the other MR-free template. CONCLUSION: The novel MR-free template based on the early-phase perfusion images pAV-45 approach for amyloid imaging showed significantly better performance in quantitation accuracy, effect size, and stability when compared with other MR-free PET templates and thus has potential for large-scale clinical applications. SN - 1619-7089 UR - https://www.unboundmedicine.com/medline/citation/23412134/Perfusion_like_template_and_standardized_normalization_based_brain_image_analysis_using_18F_florbetapir__AV_45/Amyvid__PET_ L2 - https://dx.doi.org/10.1007/s00259-013-2350-x DB - PRIME DP - Unbound Medicine ER -