Design and building of a phantom for the recording of internal temperature, in an ultra-low magnetic field MRI system

A temperature recording and storage system was designed and built, consisting of an array of five thermistor-type sensors, coupled to a synthetic model of biological tissue (MRI phantom) for Ultra-Low Field Magnetic Resonance Imaging System (ULF-MRI), using the Atmega328P microcontroller, like data logging and also used to determine the change in temperature associated with the absorption of energy within the phantom due to the interaction between the radio frequency (RF) field with a sample in different regions within it in MRI studies. The changes in temperature during the MRI study was registered for the entered MRI sequence. All the experiments were carried out in a ULF-MRI system Terranova that uses the Earth’s magnetic field to obtain the resonance signal from the magnetization of the protons present in a sample of interest, and thus be able to perform primary imaging and spectroscopy studies [1].