TABLE 1

Homogeneity of Uptake Rate Constant K₁ from 17-Segment Analysis

Tracer	Mean rest K₁ ± SD (mL/min/g)	Rest COV (%)	Mean stress K₁^† ± SD (mL/min/g)	Stress COV (%)	Mean MFR*^† ± SD	MFR* COV (%)
²⁰¹Tl
NC	0.51 ± 0.07	13.2	0.99 ± 0.18	20.5	1.91 ± 0.41	22.2
AC	0.47 ± 0.07	14.3	0.85 ± 0.15	18.7	1.83 ± 0.32	17.2
ACSC	0.41 ± 0.08	19.1	0.77 ± 0.18	23.0	2.03 ± 0.45	21.5
^99mTc-tetrofosmin
NC	0.25 ± 0.04	15.1	0.33 ± 0.05	13.9	1.38 ± 0.15	11.5
AC	0.22 ± 0.02	8.9	0.29 ± 0.03	9.1	1.32 ± 0.13	10.2
ACSC	0.21 ± 0.02	11.8	0.28 ± 0.04	13.5	1.33 ± 0.16	12.3
^99mTc-sestamibi
NC	0.34 ± 0.04	12.2	0.44 ± 0.08	15.5	1.38 ± 0.26	19.2
AC	0.28 ± 0.03	10.3	0.40 ± 0.06	13.3	1.42 ± 0.23	16.0
ACSC	0.27 ± 0.03	12.6	0.39 ± 0.06	15.2	1.49 ± 0.28	18.2

↵† Stress K₁ and MFR* are evaluated over nonoccluded segments (microsphere MFR > 1.5).
COV = SD divided by mean × 100%, averaged over pigs.