These preliminary data indicate that the use of a transpulmonary ultrasound contrast agent (SH U 508 A) may substantially broaden the spectrum and potential diagnostic utility of transcranial ultrasound by allowing detection of supratentorial peripheral central nervous system arteries, deep cerebral veins, and (through the foramen magnum) the entire vertebrobasilar system, including the cerebellar arteries.
Spectral Doppler intensitometry to study transit of a bolus of an ultrasonographic (US) contrast agent in the hepatic veins was performed in seven patients suspected of having liver metastases and seven control subjects. All control subjects had a late response (rise time, > 25 seconds; time to peak intensity, > 45 seconds), whereas six of seven patients had an early response (rise time, < 25 seconds; time to peak intensity, < 45 seconds) (P < .01).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.