Temperature Mapping During MR-Guided Cryoablation Using a FLORET UTE Sequence.

ABSTRACT:

Purpose

To implement a three-dimensional FLORET-UTE sequence for rapid MR thermometry during cryoablation and to validate voxel-wise temperature maps against fiber-optic probes in ex vivo bovine liver.

Methods

A FLORET-UTE trajectory (TE 50 μs, 1.6 mm isotropic, 18 s/volume) was executed on a 3 T scanner while dry-ice cryoablation was applied to liver phantoms. Four fiber-optic sensors provided reference temperatures. Magnitude signal was normalized to baseline and fitted to a mono-exponential temperature model in the first experiment; the unchanged model was applied prospectively to the second dataset. Images were reconstructed offline with ℓ2$$ {\mathrm{\ell}}_2 $$ -regularized non-Cartesian SENSE. Accuracy below 0°C was assessed with root-mean-square error (RMSE) and Blan

SUBMITTER: Gutt M 

PROVIDER: S-EPMC12746407 | biostudies-literature | 2026 Mar

REPOSITORIES: biostudies-literature