Multicontrast real-time magnetic particle imaging successfully detected intracranial hemorrhage in less than 3 minutes and differentiated liquid from coagulated blood in a murine model.
Does multicontrast real-time magnetic particle imaging detect intracranial hemorrhage and monitor hematoma expansion in a murine model?
Multicontrast real-time magnetic particle imaging can rapidly detect intracranial hemorrhage and differentiate liquid from coagulated blood in a murine model, demonstrating potential for point-of-care stroke monitoring.
Magnetic particle imaging (MPI) is an innovative radiation-free tomographic imaging method providing excellent temporal resolution, contrast, sensitivity, and safety. Mobile human MPI prototypes suitable for continuous bedside monitoring of whole-brain perfusion have been developed. However, for the clinical translation of MPI, a crucial gap in knowledge still remains: while MPI can visualize the reduction in blood flow and tissue perfusion in cerebral ischemia, it is unclear whether MPI works in intracranial hemorrhage. Our objective was to investigate the capability of MPI to detect intracranial hemorrhage in a murine model. Intracranial hemorrhage was induced through the injection of collagenase into the striatum of C57BL/6 mice. After the intravenous infusion of a long-circulating MPI-tailored tracer consisting of superparamagnetic iron oxides, we detected the intracranial hemorrhage in less than 3 min and could monitor hematoma expansion in real time. Multicontrast MPI can distinguish tracers based on their physical characteristics, core size, temperature, and viscosity. By employing in vivo multicontrast MPI, we were able to differentiate areas of liquid and coagulated blood within the hematoma, which could provide valuable information in surgical decision making. Multicontrast MPI also enabled simultaneous imaging of hemorrhage and cerebral perfusion, which is essential in the care of critically ill patients with increased intracranial pressure. We conclude that MPI can be used for real-time diagnosis of intracranial hemorrhage. This work is an essential step toward achieving the clinical translation of MPI for point-of-care monitoring of different stroke subtypes.
Szwargulski et al. (Thu,) conducted a other in Intracranial hemorrhage. Multicontrast real-time magnetic particle imaging (MPI) with superparamagnetic iron oxide tracer was evaluated on Detection of intracranial hemorrhage and real-time monitoring of hematoma expansion. Multicontrast real-time magnetic particle imaging successfully detected intracranial hemorrhage in less than 3 minutes and differentiated liquid from coagulated blood in a murine model.
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