Title
Demystifying T1-MRI to FDG(18)-PET Image Translation via Representational Similarity
Abstract
Recent development of image-to-image translation techniques has enabled the generation of rare medical images (e.g., PET) from common ones (e.g., MRI). Beyond the potential benefits of the reduction in scanning time, acquisition cost, and radiation exposure risks, the translation models in themselves are inscrutable black boxes. In this work, we propose two approaches to demystify the image translation process, where we particularly focus on the Tl-MRI to PET translation. First, we adopt the representational similarity analysis and discover that the process of T1-MR to PET image translation includes the stages of brain tissue segmentation and brain region recognition, which unravels the relationship between the structural and functional neuroimaging data. Second, based on our findings, an Explainable and Simplified Image Translation (ESIT) model is proposed to demonstrate the capability of deep learning models for extracting gray matter volume information and identifying brain regions related to normal aging and Alzheimer's disease, which untangles the biological plausibility hidden in deep learning models.
Year
DOI
Venue
2021
10.1007/978-3-030-87199-4_38
MEDICAL IMAGE COMPUTING AND COMPUTER ASSISTED INTERVENTION - MICCAI 2021, PT III
Keywords
DocType
Volume
Explainability, Medical image translation
Conference
12903
ISSN
Citations 
PageRank 
0302-9743
0
0.34
References 
Authors
0
4
Name
Order
Citations
PageRank
Chia-Hsiang Kao100.34
Yong-Sheng Chen231430.12
Li-Fen Chen374656.55
Wei-chen Chiu414616.07