Mamoru Takahashi1, Yasuo Takehara2,
Takahiro Natsume3, Norihiro Tooyama, Katsutoshi Ichijo, Harumi
Sakahara2, Atsushi Nozaki4
1Seirei Mikatabara General Hospital,
Hamamatsu, Shizuoka, Japan; 2Hamamatsu University of Medicine; 3Seirei
Hamamatsu General Hospital; 4GE Healthcare Japan
Problem:
Tumor detection based on apparent diffusion co-efficient (ADC) is not always
efficient and accurate on the high b-value diffusion weighted image (DWI).
Method: The signal intensity ratio between lesions and spinal cord signal
(LSR) were measured on DWI. The LSR was higher in malignant tumors than in
other lesions. Tumor screening application gLSR maph was developed based on
the signal intensity ratio between the lesions and the spinal cord signal on
DWI. Results: With the cut-off of 0.45 for LSR, sensitivity for malignant
tumor was 100%. Using the color map, effective and robust tumor screening was
feasible on DWI.