Truly hybrid X-ray/MR imaging: toward a streamlined clinical system

Area of Science:

• Medical Imaging
• Hybrid Imaging Systems
• Interventional Radiology

Background:

• The development of truly hybrid X-ray/MR (XMR) systems aims to enhance imaging capabilities during interventional procedures.
• Previous prototypes have shown promise, but further improvements in signal-to-noise ratio (SNR) and system compatibility are crucial for clinical utility.

Purpose of the Study:

• To describe the methods and improvements of an upgraded X-ray/MR (XMR) hybrid system, the SP-XMR.
• To detail the enhancements made to increase compatibility between the X-ray and MR components.
• To demonstrate the improved patient management facilitated by the upgraded system.

Main Methods:

• Installation of a GE OEC 9800 X-ray system integrated with a 0.5T GE Signa-SP MR magnet.
• Reconfiguration of the X-ray system including a higher power tube, new mounting, automatic exposure control (AEC), remote collimators, variable frame rates, and DICOM compatibility.
• Implementation of a magnetically shimmed X-ray detector, an X-ray compatible MR coil, and improved RF shielding.

Main Results:

• A 70% increase in fluoroscopy power and a 6-fold increase in single-frame imaging power significantly improved imaging capabilities.
• Multiple frame rates, AEC, and collimator control reduced patient X-ray exposure.
• Enhanced MR compatibility and DICOM integration facilitated faster switching between imaging modes and seamless image transfer.

Conclusions:

• The upgraded SP-XMR system offers streamlined X-ray/MR hybrid imaging with improved performance and compatibility.
• The enhancements enable broader application of hybrid imaging for patient management.
• Further clinical procedures can benefit from the advanced capabilities of the new SP-XMR system.