Mri thermal imaging of water tissue and fat tissue using transverse relaxometry data and proton resonance frequency shift data

An apparatus comprising a magnetic resonance imaging system, the magnetic resonance imaging system comprising:

• a magnet adapted for generating a magnetic field for orientating the magnetic spins of nuclei of a subject located within an imaging volume;
• a radio frequency transceiver adapted for acquiring magnetic resonance data using a radio frequency coil;
• a magnetic field gradient coil adapted for spatial encoding of the magnetic spins of nuclei within the imaging volume;
• a magnetic field gradient coil power supply adapted for supplying current to the magnetic field gradient coil;
• a computer system comprising a processor, wherein the computer system is adapted for controlling the apparatus;
• and
• a memory containing machine readable instructions for execution by the processor, wherein execution of the instructions cause the processor to perform the steps of:
• acquiring magnetic resonance data using the magnetic resonance imaging system, wherein the magnetic resonance data comprises transverse relaxometry T2 or T2 star data, as well as proton resonance frequency shift data, wherein at least the transverse relaxometry T2 or T2 star data is acquired using a turbo spin echo (TSE) sequence, and
• calculating the temperature of the subject within a temperature measurement volume in accordance with the transverse relaxometry T2 or T2 star data, in combination with calculating the temperature of the subject within the temperature measurement in accordance with the proton resonance frequency shift data, wherein the temperature measurement volume is within the imaging volume.