Simple and cost-effective 3D field mapping robot

Motivation: Measurement of parameters like magnetic field and temperature inside a magnet bore is of interest at all MR magnetic field strengths to characterize the system and use that information for downstream image quality improvement or to determine safety thresholds. Goal(s): Build and test a simple 3D movement robot. Approach: we design, build and test a simple 3D movement robot with a sensor holder as a standalone system using a Raspberry Pi and a 16 channel ADC hat. Results: The robot is capable of sub-millimeter measurements. We demonstrate the 3D field mapping of a 50mT scanner as an example use of the robot. Impact: We designed and built a $2000 3D field mapping robot to map a very low field scanner’s magnet. The system is standalone exploiting Raspberry Pi’s system on a chip architecture and is scalable to include 16 analog inputs (sensors).