The objective of this study was to the created surface of quantitative uptake value with radioactive tracer PET/CT in normal Thai brain. The surface was generated from the matrix of quantitative uptake value by MATLAB software. Data of PET/CT image was modified to High dynamic range imaging file format by MRI convert and merge together with ana75_2.mat, in this step surfacedata.mat was obtained. The surface data was taken to create a surface of quantitative uptake value to observing the distribution of radiopharmaceuticals in the region of interest.
In this paper, we investigated <sup>18</sup>F-THK5351 PET/CT image of normal Thai population for the optimized time of radioactive tracer PET/CT. Twenty-five volunteers without neurological or psychiatric illnesses and all of them have no abnormalities detected on neurologic examination. All subject were underdiagnosed on <sup>18</sup>F-THK5351 PET/CT and 3.0 Tesla MR imaging. THK5351 PET/CT were operated on the co-registered MRI comprised for drawing an ROI. The DICOM file was converted to .img file, .hdr file and then merge with each other for obtaining an fmridata.mat. Position of ROI and fmridata.mat were used to plot graph showing the relationship between quantitative uptake with the frame of image. The optimized time of <sup>18</sup>F-THK5351 PET/CT in normal Thai population is 50 to 70 minutes.