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Table 1 Area under the curve ratio between probe-derived, image-derived and manually sampled input functions

From: Use of a beta microprobe system to measure arterial input function in PET via an arteriovenous shunt in rats

  Subject    
  1 2 3 4 5 6 7 8    
  AUC AUC AUC AUC AUC AUC AUC AUC Mean SD COV
Unfitted IF            
Probe IF 21,173 27,576 19,765 19,024 23,710 17,389 33,630 19,448    
Manual IF 20,246 26,385 18,418 17,265 22,878 15,270 30,684 19,538    
Image-derived IF 13,283 27,099 9,486 19,543 14,565 14,563 16,506 12,149    
Probe/manual 1.046 1.045 1.073 1.102 1.036 1.139 1.096 0.995 1.067 0.045 0.042
Pet/manual 0.656 1.027 0.515 1.132 0.637 0.954 0.538 0.622 0.760 0.240 0.315
Probe/PET 1.594 1.018 2.084 0.973 1.628 1.194 2.037 1.601 1.516 0.425 0.281
Fitted IF            
Probe IF 21,720 27,762 19,866 18,595 23,573 17,347 33,434 19,344    
Manual IF 20,981 26,414 18,500 17,602 23,402 15,226 30,297 19,693    
Image-derived IF 13,533 26,243 9,094.8 19,158 14,793 11,393 16,937 12,574    
Probe/manual 1.035 1.051 1.074 1.056 1.007 1.139 1.104 0.982 1.056 0.050 0.048
Pet/manual 0.645 0.994 0.492 1.088 0.632 0.748 0.559 0.639 0.725 0.210 0.290
Probe/PET 1.605 1.058 2.184 0.971 1.594 1.523 1.974 1.538 1.556 0.408 0.262
  1. AUC, area under curve; COV, coefficient of variation; IF, input function; SD, standard deviation.