Sentence examples for rate of radioactivity from inspiring English sources

High-activity lesions in PET image appear with higher intensity due to more absorption of radio isotope material and higher rate of radioactivity [ 17].

Whole-brain time-activity curves were obtained and the efflux rate constant (keff) of radioactivity from brain was calculated using data from 17.5-80 min after radiotracer injection.

Brain efflux rate constant (keff) of radioactivity was significantly (p < 0.05, t-test) reduced in Mrp1 compared to wild-type mice ((keff (h-1): wild-type: 1.29 ± 0.33; Mrp1: 0.25 ± 0.03).

Dosimetry calculations indicated that this critical parameter could vary considerably due to differences in the rate of clearance of radioactivity from the resection cavity and the resection cavity volume.

We compared poly(ADP-ribose polymerase ADP-ribose polymeraseof incorporactivity radioactivity from [3H]adenine-NAD+ into acid-insolubye matheial in peratebilized leucofytes from FAP patincorporationlthy vofunteeradioactivity

The large difference in clearance rates of the radioactivity from the tumor is likely due to differential trapping of residualizing zirconium versus non-residualizing iodine.

Mean reduction rate of blood sampling radioactivity was 0.95 ± 0.17 %/min.

Table 2 Comparison of the proportion of the reduction rate of image-derived radioactivity   Ascending aorta Aortic arch Pulmonary artery Left ventricle Right ventricle Inferior vena cava Abdominal aorta reduction rate /min 1.32 ± 0.29 1.05 ± 0.30 1.37 ± 0.28 1.23 ± 0.30 1.37 ± 0.23 1.27 ± 0.27 1.13 ± 0.48 Data are mean ± SD.

The data obtained show a very similar rate of clearance for radioactivity and Gd from most tissues, and that measurements of Gd content in tissue samples cannot be used to estimate the amount of Gd released from the chelate.

Integration plot analysis was used to estimate the rate constant for transfer of radioactivity from the liver via bile into the intestine (kbile).

In both studies, a two-tissue-4-rate constant (2T4K) compartment model was applied to estimate the brain-to-plasma partition coefficient, referred to as the volume of distribution in PET literature (V T-2T4K), and the rate constants describing exchange of radioactivity between the plasma and the two brain tissue compartments.