TABLE 1.

Residence Times (Hours) in Source Organs After Injection of ⁶⁸Ga-Citrate

Organ	Mean ± SD	COV (%)	Range
Brain	0.008 ± 0.001	19	0.006–0.009
Gallbladder contents	0.000 ± 0.000	48	0.000–0.001
Left colon	0.002 ± 0.001	23	0.001–0.003
Small intestine	0.012 ± 0.003	27	0.007–0.016
Stomach contents	0.009 ± 0.004	38	0.004–0.013
Right colon	0.002 ± 0.001	23	0.001–0.003
Rectum	0.002 ± 0.001	25	0.001–0.003
Heart contents	0.048 ± 0.006	12	0.041–0.055
Heart wall	0.027 ± 0.004	13	0.024–0.033
Kidneys	0.020 ± 0.003	14	0.017–0.023
Liver	0.091 ± 0.017	19	0.077–0.121
Lungs	0.079 ± 0.008	10	0.066–0.088
Muscle	0.365 ± 0.043	12	0.299–0.420
Pancreas	0.005 ± 0.002	49	0.003–0.008
Red marrow	0.046 ± 0.004	10	0.038–0.052
Cortical bone	0.032 ± 0.005	15	0.026–0.040
Trabecular bone	0.009 ± 0.002	22	0.007–0.012
Spleen	0.009 ± 0.002	28	0.006–0.012
Testes	0.002 ± 0.000	15	0.001–0.002
Thyroid	0.001 ± 0.000	19	0.000–0.001
Urinary bladder contents	0.021 ± 0.008	37	0.013–0.035
Remainder of body	0.810 ± 0.033	4	0.767–0.858

COV = coefficient of variation (SD/mean × 100).