Investigation of Attenuation Correction for Small-Animal Single Photon Emission Computed Tomography
Table 3
Assessing the results after corrections of concentric phantom with five different parameters.
Mean
CV
RMSE
NRMSE
MPE
The most inner layer of the concentric phantom
Original
9.02450
0.01507
0.41616
0.04417
SC only
6.77330
0.01769
2.65140
0.28139
Chang + SC
10.68580
0.01764
1.27450
0.13526
CTAC + SC
9.10310
0.01811
0.35180
0.03734
CTIACR + SC
9.26040
0.03255
0.31458
0.03339
CTMAC + SC
9.34950
0.01750
0.16349
0.01735
The most outer layer of the concentric phantom
Original
0.96092
0.05688
0.55053
0.36486
SC only
0.70550
0.05687
0.80432
0.53306
Chang + SC
0.98716
0.05907
0.52479
0.34780
CTAC + SC
0.90757
0.05276
0.60310
0.39971
CTIACR + SC
1.09030
0.06928
0.42502
0.28168
CTMAC + SC
0.96426
0.05810
0.54734
0.36275
The true value of the activity concentration in the most inner layer is 9.4225 MBq/cm3. The true value of the activity concentration in the most outer layer is 1.51 MBq/cm3.
