“…Starting from 1979, early investigations assessing the feasibility of applying ultrasound imaging for temperature detection in biological tissues were carried out by several research groups [ 159 , 160 , 161 , 162 , 163 , 164 ]. Ultrasound-based thermometry has found certain applications in the field of HIFU [ 35 , 36 , 37 , 38 ], and RFA [ 69 , 70 ] therapies, mainly on hepatic tissues, and to a lesser extent during LA [ 165 , 166 ] and MWA [ 167 ]. Despite the large use of ultrasound imaging in clinical practice, only a few studies have been conducted in the field of myocardial RFA.…”