Ricardo Alexandre Marques Bogalho

Title: Ricardo Alexandre Marques Bogalho: Inventor in Medical Imaging

Introduction

Ricardo Alexandre Marques Bogalho is an inventor based in Lisbon, Portugal. His work includes a patent for a readout system designed to support precise energy and time-of-flight measurements in medical imaging.

Latest Patents

Bogalho is associated with 1 patent, titled “Reading Device and Method for Measuring Energy and Flight Time Using Silicon Photomultipliers.” The invention describes a readout apparatus and method for measuring time of flight and energy using silicon photomultipliers (SiPMs) coupled to a scintillator.

After calibration, the system can achieve timing accuracy of 50 picoseconds or better. It measures energy using a time-over-threshold technique, with energy resolution constrained by scintillation statistics. To keep power consumption low, at approximately 10 milliwatts per channel, the design uses a low-impedance input amplifier and analog time-to-digital converters based on time interpolation.

The circuit can trigger on a single photoelectron with a signal-to-noise ratio above 20 decibels. It is designed to operate with SiPMs of different gains, polarities, and matrix sizes. A preferred implementation is a 64-channel application-specific integrated circuit.

Career Highlights

Bogalho is associated with PETsys Medical PET Imaging Systems, S.A., a company focused on medical positron emission tomography systems. His patented work addresses readout electronics for SiPM-based detection, combining timing precision, energy measurement, and low-power operation.

Collaborations

His listed coworkers include João Manuel Coelho Dos Santos Varela and Angelo Rivetti.

Conclusion

Ricardo Alexandre Marques Bogalho’s patent presents a low-power, multichannel approach to SiPM readout that supports precise timing and energy measurements for medical imaging applications.