Noise components on positron emission tomography images.
Noise components on PET images were studied. The results showed that the square of synthetic noise Delta(2) and the square of signal-to-noise ratio (N/Delta)(2) varied with the signal intensity N and the relationships were respectively expressed with: Delta(2)=0.0395N(2)+0.1427N+0.0025 (R(2)=0.9358) and (N/Delta)(2)=-1.13932N(2)+7.0185N-0.0746 (R(2)=0.9377). The synthetic noise on PET image may be categorized into three components. The first one varies directly as signal intensity, which depend on random coincidence; the second one varies directly as the square root of signal intensity, which depend on Poisson fluctuation; and the third one is independent of signal intensity.
Geng
Jianhua
J
Department of Nuclear Medicine, Cancer Hospital, Peking Union Medical College, Beijing, 100021, China.
Chen
Yingmao
Y
Yin
Dayi
D
Tian
Jiahe
J
Chen
Shengzu
S
D016477:Artifacts; D019544:Equipment Failure Analysis / Q000379:methods*; D015233:Models, Statistical; D019047:Phantoms, Imaging; D015203:Reproducibility of Results; D018401:Sample Size; D012680:Sensitivity and Specificity; D013269:Stochastic Processes; D014055:Tomography, Emission-Computed / Q000295:instrumentation / Q000379:methods*