Table 1 Transit measurements in GI tract using charcoal Tc-DTPA at different time points

Specimen number

After gavages of charcoal Tc-DTPA

Transit measurements in the GI tract

1

1 h and 10 min

Stomach and small intestine are clearly labeled

2

3 h

Stomach and small intestines are clearly labeled; leading front is just entering into the cecum

3

6 h

Whole GI tract is prominently labeled; well-defined cecum, transverse colon and large intestinal loops, and prominent labeling of the colon were seen

4

8 h

The transverse colon, descending colon and fecal pellets in the rectum are clearly labeled

5

22 h

Only little activity remains in the stomach (potentially parietal cells accumulating free Tc)