[An ionic triiodinated benzoate used as a contrast agent in diagnostic imaging. Like other organic iodine compounds, iothalamic acid blocks x-ray and appears opaque on x-ray film, thereby enhancing the visibility of structure and organs during angiography, arteriography, arthrography, cholangiography and computed tomography (CT) scanning procedures. ( NCI )]
UMLS (NCI) C0022034 - Organic Chemical
- Indicator, Reagent, or Diagnostic Aid