Tracking system for magnetic foreign bodies localization using a portable device

• Main Authors: Marcos Rogozinski, Carlos Roberto Hall Barbosa, Elisabeth Costa Monteiro
• Format: Article
• Language: English
• Published: Elsevier 2021-12-01
• Series: Measurement: Sensors
• Subjects: Biomagnetism; Camera pose; Magnetic foreign body; GMR; Data fusion; Convolutional neural networks
• Online Access: http://www.sciencedirect.com/science/article/pii/S2665917421002385

This paper presents a tracking system to find the position and yaw rotation of a handheld device based on the imaging of an adhesive marker attached to a person's body. Our goal is to provide accurate data that can be combined with data from a giant magnetoresistance sensor to be able to locate a foreign body inside a human body for surgical removal. We tested the system with a series of computer simulations and analyzed the results obtained. Our best setup provided a Root Mean Square Error of less than 1.6 mm for the x coordinate, less than 1 mm for the y coordinate, less than 1.2 cm for the z coordinate and less than 1.1° for the yaw rotation value in a test with wide variations of all values. The results obtained are promising and open the way for the combination of data with the portable magnetic sensor.