UltraFlex: Iterative Model-Based Ultrasonic Flexible-Array Shape Calibration.

ABSTRACT: UltraFlex is an iterative model-based ultrasonic flexible-array shape calibration framework that uses automatic differentiation. This work evaluates array shape calibration model performance while examining multiple image quality metrics: speckle brightness, envelope entropy, coherence factor, lag-one coherence, common-midpoint correlation coefficient (CMCC), and common-midpoint phase error (CMPE). The accuracy of these image quality metrics was evaluated on simulated phantoms using a variety of array shapes. Experimental phantom and in vivo liver datasets were also investigated using transducers with known geometries. While speckle brightness, envelope entropy, and coherence factor enable model convergence under many conditions, lag-one coherence, CMCC, and CMPE enable more accurate eleme

SUBMITTER: Frey BN 

PROVIDER: S-EPMC12947941 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature