Profile Analysis of Signal Intensity Ratio (SIR) Values in Focal Liver Tumor of In-Phase/Opposed-Phase Abdominal MR

In Phase Opposed Phase Sequence is sensitive to the presence of fat in the parenchymal liver. The value of signal intensity ratio in those sequences can evaluate the characteristic of focal liver tumor. Several studies have shown that the cutoff point of signal intensity ratio values have good accuracy, sensitivity and specificity. The aim of this study was to determine the profile of signal intensity ratio value in the in-phase opposed-phase sequence for the focal liver tumors. Of forty five focal tumor liver samples including twenty seven malignant and eighteen benign samples. The signal intensity ratio value calculation was obtained from the quotient of the mean value of solid tumors in the in phase versus opposed phase by placing the region of interest in the solid tumor area. The result of this study indicates that the signal intensity ratio value has a cutoff point, sensitivity, specificity, accuracy are zero point nine eight six three, eighty one percent, seventy seven point eight percent, eighty percent in respectively. In conclusion, the signal intensity ratio value could be used as a non invasive method to differentiate the focal liver tumor.