image reconstruction method to reconstruct the image by correcting the response depth information included in the observed data using the flight time information of the positron emission tomography
The present invention estimates the positron distribution using flight time (TOF, Time-Of-Flight) information to accurately estimate the depth of reaction (DOI, Depth-Of-Interaction) of the incident, and the estimated positron distribution Calculates the conditional probability that a accident event has been observed at each reaction depth (DOI, Depth-Of-Interaction), and uses the calculated conditional probability to obtain information about the response depth (DOI, Depth-Of-Interaction) of the incident event. One correction relates to the method. In addition, rearranged by using the corrected depth of response (DOI, Depth-Of-Interaction) information, using a sinogram (Sinogram), or a response line (LOR, Line-Of-Response) type histogram (Histogram) vector It relates to a method of reconstructing an improved image using projection and back projection in a model.본 발명은 우연사건의 반응깊이(DOI, Depth-Of-Interaction)를 정확히 추정하기 위하여, 비행시간(TOF, Time-Of-Flight) 정보를 이용하여 양전자 분포에 대한 추정을 하고, 추정된 양전자 분포를 이용하여 각 반응깊이(DOI, Depth-Of-Interaction)에서 우연사건이 관측되었을 조건부확률을 계산하고, 계산된 조건부확률을 이용하여 우연사건의 반응깊이(DOI, Depth-Of-Interaction) 정보를 보정하나는 방법에 관한 것이다. 또한, 보정된 반응깊이(DOI, Depth-Of-Interaction) 정보를 이용하여 재배열괸 사이노그램(Sinogram)을 이용하거나 또는 반응선(LOR, Line-Of-Response) 형태의 히스토그램(Histogram) 벡터모델에서의 투사와 역투사를 이용하여 향상된 영상을 재구성하는 방법에 관한 것이다.
