Physiological Recording in the MRI Environment (PRiME): MRI-Compatible Hemodynamic Recording System
Hemodynamic recording during interventional cardiovascular procedures is essential for procedural guidance, monitoring patient status, and collection of diagnostic information. Recent advances have made interventions guided by magnetic resonance imaging (MRI) possible and attractive in certain clinical scenarios. However, in the MRI environment, electromagnetic interference (EMI) can cause severe distortions and artifacts in acquired hemodynamic waveforms. The primary aim of this paper was to develop and validate a system to minimize EMI on electrocardiogram (ECG) and invasive blood pressure (IBP) signals.
Acousto-optic Catheter Tracking Sensor for Interventional MRI Procedures
Catheter tracking and guidance in the body is essential for interventional procedures. However, traditional catheters are invisible under magnetic resonance imaging (MRI). We present an acousto-optic sensor for tracking catheter position during interventional MRI. A coil antenna collects local MRI signal. In order to eliminate the RF induced heating, optical fiber is used to carry the MRI signal. An acousto-optic modulator based on fiber Bragg grating (FBG) is developed to convert the electrical signal from the antenna to optical signal to be carried by the fiber. Sensor was successfully tested for position detection in phantom under MRI.