Assertion: iodine's isotope | /r/HasProperty | necessary
Facets:
value: in tests
type: TEMPORAL
Source sentences:
text: The relatively low-energy gamma from I-125/Te-125 decay is poorly suited for imaging, but can still be seen, and this longer-lived isotope is necessary in tests that require several days of imaging, for example, fibrinogen scan imaging to detect blood clots.