Patent ID: 11885840
Assignee: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE
Field: Measurement (Instruments)
Classification: CPC G  A | IPC A  G

Claim 3:
4. A method of measuring temperature rise of a hip joint implant using magnetic resonance imaging (MRI), the method comprising:
arranging the hip joint implant in a human lower body-shaped phantom;
arranging a plurality of temperature sensors on the hip joint implant;
providing radio frequency (RF) energy according to an MRI sequence to the human phantom;
measuring, by the temperature sensors, a change in temperature of the hip joint implant;
calculating, by the temperature sensors, a specific absorption rate (SAR) of the hip joint implant from the measured temperatures;
wherein the plurality of temperature sensors are configured to:
measure ambient temperatures of the hip joint implant; and

calculate the SAR of the hip joint implant from the measured temperatures;, wherein the SAR is obtained by calculating Equation, SAR
  =
  
   
    c
    p
   
   ⁢
   
    ΔTemperature
    Δtime
   
  
 

here, cp=4,156 J/(kg·° C.), cp denotes heat capacity of a gel material, ΔTemperature denotes a change in temperature in degree Celsius (° C.), the change in temperature ° C. is a difference between a temperature measured when an artificial hip joint is inserted and a temperature measured before the artificial hip joint is inserted, and Δtime denotes a time in seconds, the time in seconds is an image capturing time for each sequence.