Abstract
Materials and methods A movable circle surface coils with a low input impedance preamplifier were made to connect the receive system of a 1.5T MRI scanner (Symphony, Siemens). The coil was moved together with the HIFU transducer during the HIFU ablation. The dynamic temperature images during HIFU ablation of porcine meat and living mini-pig leg were measured by this home-made coil. MR temperature measurements were calculated based on proton resonance frequency (PRF) shift method. A spoiled gradient echo sequence was applied for temperature mapping (TR = 13ms, TE = 7 ms, flip angle = 30 deg, matrix 128x128, FOV= 256 x 256 mm, slice thickness = 8 mm).
Highlights
In this study, a moveable MRI receive-only surface coil was fabricated and used to provide higher SNR MRI images focused on a small area
The moveable coil can be moved together with the HIFU transducer to improve the accuracy of MRI temperature measurement of HIFU ablation in a mini-pig model
The dynamic temperature images during HIFU ablation of porcine meat and living mini-pig leg were measured by this home-made coil
Summary
A moveable MRI receive-only surface coil was fabricated and used to provide higher SNR MRI images focused on a small area. The moveable coil can be moved together with the HIFU transducer to improve the accuracy of MRI temperature measurement of HIFU ablation in a mini-pig model
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