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Abstract #2971

Spatial correspondence between [18F]NaF PET uptake and bone strain in the tibia

Olivia L Bruce1, Ananya Goyal1, Anthony A Gatti1, and Feliks Kogan1
1Stanford University, Stanford, CA, United States

Synopsis

Keywords: Bone/Skeletal, Bone, PET, Finite Element

Motivation: Characterizing the relationships between loading and remodeling in vivo is important to understanding bone adaptation and pathophysiology. [18F]NaF PET may be a useful approach to interrogate this relationship.

Goal(s): To evaluate spatial relationships between finite element-predicted strain and changes in [18F]NaF uptake.

Approach: Finite element models were generated from MRI images to compute strains. PET images obtained simultaneously were used to compute [18F]NaF uptake before and after exercise. Mean standardized uptake and change in uptake were compared between regions experiencing different levels of strain.

Results: Mean change in tracer uptake was greater in regions of very high tensile strain.

Impact: [18F]NaF PET in combination with finite element analysis is a promising approach that can be used to improve our understanding of relationships between bone metabolism and loading, and of the pathophysiology of bone conditions.

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