Comparison of ¹¹¹In Leakage from Labeled Endocardial and Epicardial Cells: Impact on Modeling Viability of Cells to Be Transplanted into Myocardium

Table 2

Exponential curve fitting parameters.

𝑓(𝑡)=𝑎⋅exp^(−𝑏𝑡)+𝑐⋅exp^(−𝑑𝑡)
EPI
Dog	𝑎^†	𝑏	𝑐^‡	𝑑	𝑇^𝑠1/2 (hrs)	𝑇^𝑙1/2 (hrs)
1	37.9	−0.3712	62.1	−0.0012930	1.87	537
2	16.0	−0.4705	84.0	−0.0017590	1.47	394
3	—	—	100	−0.0005308	—	1306
4	19.8	−1.004	80.2	−0.0005354	0.69	1295
5	29.2	−0.291	70.8	−0.0003566	2.38	1944
6	29.6	−0.2413	70.4	−0.0002413	2.87	2873
7	29.4	−0.4448	70.6	−0.0008787	1.56	789
8	28.2	−0.4850	71.8	−0.0005060	1.43	1370
9	36.6	−0.3662	63.4	−0.0006483	1.89	1069
			71.8±2.6		1.77±0.25	1286±253
ENDO
1	40.7	−0.3407	59.3	−0.0013530	2.03	512
2	31.5	−0.2468	68.5	−0.0006903	2.81	1004
3	21.8	−2.7770	78.2	−0.0012670	0.25	547
4	29.7	−0.3896	70.3	−0.0006643	1.78	1043
5	33.1	−0.4293	66.9	−0.0004125	1.61	1680
6	49.9	−0.2316	50.1	−0.0007734	2.99	896
7	25.0	−1.1510	75.0	−0.000840	0.60	825
8	37.6	−0.4884	62.4	−0.0001245	1.42	5567
9	63.0	−0.1564	37.0	−0.0003590	4.43	1931
10	51.3	−0.1858	48.7	−0.0004166	3.73	1664
			61.6±4.1		2.17±0.42	1567±470

^†Coefficients “𝑎” and “𝑐” normalized to 100%.
^‡Dog 3 normalized data not included in fractional washout averages.