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Table 4: Results of the quantitative assessment based on asymmetry of SPECT counts
Histologic Diagnosis No. Mean AI (%) (SD) Mean AI (%)/CV (%) (SD)
Pre-PVC Post-PVC P Pre-PVC Post-PVC P
MTS 34 23 ¹⁶ 22 ¹⁶ NS 0.76 (0.52) 1.1 (0.80) <.001
MCD 11 18 (17) 25 (17) .01 0.55 (0.49) 1.3 (0.82) <.001
Tumor 20 14 (15) 17 (16) <.001 0.44 (0.43) 0.89 (0.81) <.001
Nonspecific 10 16 (22) 14 (16) NS 0.62 (0.98) 0.72 (0.83) NS

Note:—NS indicates not significant.

Histologic Diagnosis	No.	Mean AI (%) (SD)			Mean AI (%)/CV (%) (SD)
Histologic Diagnosis	No.	Pre-PVC	Post-PVC	P	Pre-PVC	Post-PVC	P
MTS	34	23 ¹⁶	22 ¹⁶	NS	0.76 (0.52)	1.1 (0.80)	<.001
MCD	11	18 (17)	25 (17)	.01	0.55 (0.49)	1.3 (0.82)	<.001
Tumor	20	14 (15)	17 (16)	<.001	0.44 (0.43)	0.89 (0.81)	<.001
Nonspecific	10	16 (22)	14 (16)	NS	0.62 (0.98)	0.72 (0.83)	NS