Magnetic fluid weight density estimation in large cavities by a needle-type GMR sensor

During hyperthermia therapy for cancer treatment magnetic fluid is injected into the tumor. Hyperthermia therapy exploits the fact that cancer cells are more sensitive to heat than healthy cells. Generally all parameters except the magnetic fluid weight density are known in the specific heat equation which governs the heat given in hyperthermia therapy to destroy cancer cells. Hence, accurate estimation of magnetic fluid weight density inside the body is critical for successful treatment. A unique needle-type GMR sensor is fabricated for inserting into the body in a low-invasive way. This paper presents analytical analysis and experimental results obtained by estimating magnetic fluid weight density in large cavities by the fabricated needle-type GMR sensor.