Hybrid Scanner Using Five Molecular Imaging Techniques Under Development

The scanner was presented at the 2015 Annual Meeting of the Society of Nuclear Medicine and Molecular Imaging (SNMMI; Reston, Virginia, USA), and consists of a window for tissue observation, and an imaging chamber. The scanner is intended for research into the microenvironment of tumors and other tissues, and co-registration of multiple lines of imaging data.

The scanner combines Positron Emission Tomography (PET) for physiological information from radiotracers, conventional and hyperpolarized Magnetic Resonance Imaging (MRI) for soft-tissue contrast and tracking of minute biochemistry, and luminescence, fluorescence and optical imaging for investigations by microscope.

The researchers presented a study in which a tumor cell line was transplanted into a rat. The animal was then imaged with conventional MRI, hyperpolarized MRI, a positron detector, and a luminescence sensor, and tissues analyzed using a fluorescence microscope.

Zhen Liu, PhD candidate, lead author of the study, at the nuclear medicine department, Technical University Munich (Munich, Germany), said, “This technology allows us to obtain in-depth knowledge of molecular imaging techniques, how to optimize them, and how to leverage data with statistical analysis while advancing new radiotracers and contrast agents for the imaging and treatment of a range of diseases. Understanding the physiology behind multimodal imaging is very challenging due to discrepancies between macroscopic and microscopic images and between images of extracted or transplanted tissues versus images of a live subject. This establishment of high-resolution multimodal intra-vital imaging can bridge these discrepancies and offer a tool for the long-term observation of underlying physiology.”

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Technical University Munich