Real-time specific absorption rate supervision for a 32-channel RF transmit system with virtual observation points.

ABSTRACT:

Purpose

Real-time supervision is a crucial element of an RF parallel transmit (pTx) system to supervise safety of the subject during MR imaging and to utilize the full potential of the RF array. However, the computational demand for the specific absorption rate (SAR) calculation scales much greater than linearly with the number of RF channels. Furthermore, a high number of virtual observation points (VOPs) for the local SAR supervision is preferable to reduce the SAR overestimation during the VOP compression, increasing the computational demand further. An RF transmit supervision system for a 32-channel pTx system including local SAR calculation with a high number of VOPs was developed.

Methods

The system includes 64 digitizer channels to measure the real and imaginary parts

SUBMITTER: Fiedler TM 

PROVIDER: S-EPMC12501689 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature