Assertion: transthoracic echocardiogram | /r/CapableOf | involve placing gel
Facets:
value: on the patient's chest
type: LOCATION
value: before using a device
type: TEMPORAL
Source sentences:
text: The transthoracic echocardiogram is a noninvasive echocardiogram and involves placing gel on the patient's chest before using a device to record the sound waves produced by the heart.