Method and system for calculating SUV normalization coefficient in a SPECT quantitative tomographic image

A system for calculating SUV normalization coefficient in a SPETOMOGRAPHIC quantitative tomographic image, comprising:

• a module for calculating an effective radioactive uptake area, which is used to average the anterior plain film image and posterior plain film image obtained by performing plain film scanning on a subject's whole body to get an average image, from which the area corresponding to the radioactive uptake site in the subject is segmented, and defined as an effective radioactive uptake area,
• a module for calculating a quantitative two-dimensional radioactive uptake activity image, which is used to correct attenuation coefficient of human body, detection efficiency and acquisition time for each pixel value in the effective radioactive uptake area within said average image, and calculate the average radioactive uptake activity of the human body part corresponding to each pixel in the anteroposterior direction, further to figure out the quantitative two-dimensional radioactive uptake activity image after averaging each part of the human body corresponding to the average image in the anteroposterior direction, wherein said attenuation coefficient of human body is an average linear attenuation coefficient of the part of human body corresponding to a pixel value,
• and a module for calculating an average radiopharmaceutical activity concentration, which is used to average all the effective radioactive uptake area pointed at by said quantitative two-dimensional radioactive uptake activity image, and perform volume normalization and decay time correction to figure out the average radiopharmaceutical activity concentration absorbed in the subject, which is a SUV normalization coefficient used to calculate a SPETOMOGRAPHIC quantitative tomography image.