Answers are grounded in this paper and cite their sources.
Real-time ultrasound has been found to be a satisfactory method for studying changes in gall-bladder size. It is superior to many other methods since it is non-invasive, harmless, and does not rely on the metabolism of a contrast agent. We have also found it easy to identify and compensate for changes in the gall-bladder axis. Rapid serial images are easily obtained and show similar contraction patterns to those resulting from conventional techniques.
No takes yet. Share an insight, caveat, or question.
Palframan et al. (1979) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: