The aim of the European Gamma MRI project is to develop a functional prototype for in vivo molecular imaging, based on a revolutionary technology that simultaneously exploits the sensitivity of gamma (γ) detection, spatial resolution, and flexibility of magnetic resonance imaging (MRI).
Gamma MRI is not just a hybrid approach combining distinct modalities, but a new one that simultaneously achieves the high spatial resolution of MRI and the high sensitivity of positron emission tomography (PET), with shorter scan times. It does not require ultra-high magnetic fields or γ-ray detection, nor expensive shielded rooms.
Gamma MRI will be less complex and therefore less costly than current state-of-the-art equipment. This approach will open new perspectives for patient care and the medical imaging market.
In this context, the Electronics laboratory (in collaboration with the Nuclear chemistry and physics laboratory), has developed a system for the excitation and measurement of nuclear magnetic resonance (NMR), performed at very low magnetic fields (Gamma-MRI project). This measurement is used to determine whether the Xenon used for imaging has been correctly hyperpolarized.
At the heart of the design is a digital electronic board developed by HEPIA. It includes an FPGA programmable circuit, a microcontroller, a dynamic DDR memory, Ethernet and USB connections. The board will acquire data, store it, and send it to a PC for further processing.
For this application, we have specifically developed a mezzanine board that includes the current-generating electronics for producing the magnetic field in the transmitting coils, the acquisition and conditioning of the NMR signal from the receiving coil, and the user interface.
ULFNMR global concept
ULFNMR User interface
Project partner(s)
Project leader - team
Nicola Giandomenico
(HEPIA),
Harley Stoeckli
(HEPIA)