Evaluation study of radial and spiral based volumetric thermometry for monitoring of hepatic microwave ablation.

ABSTRACT: Microwave ablation (MWA) of hepatic tumors benefits from MR thermometry, enabling real-time temperature monitoring to guide treatment and protect healthy tissue. However, MR thermometry in the abdomen is challenging due to respiratory and intestinal motion. This study evaluates two advanced 3D imaging sequences, Stack-of-Stars (Stars) and Stack-of-Spirals (Spirals), for precise MWA thermometry in phantom and volunteer experiments. Spirals demonstrated superior temperature precision, with a standard deviation of 1.61 ± 0.11 °C in unheated regions, compared to 4.87 ± 0.74 °C for Stars (single respiratory cycle). In heated regions, Spirals achieved a lower RMSE (0.6 ± 0.1 °C vs. 1.3 ± 0.3 °C for Stars) and a higher Dice score for ablation zone delineation (0.88 ± 0.02 vs. 0.77 ± 0.09). Spiral

SUBMITTER: Horstmann D 

PROVIDER: S-EPMC12460675 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature