Contrast Media in Medical Imaging
Main Contrast Media Types
Contrast Media Precautions
Barium
Contrast Radiography
DSA (Digital Subtraction Angiography)
Other Contrast Investigation Definitions
Sialogram
- Purpose: To show the duct system more clearly by injecting contrast into the ducts of the salivary glands
- Applicability: Only the submandibular and parotid glands have ducts that can be cannulated
- Clinical Uses: Identifies stones and strictures in the ducts
Sinogram
- Purpose: Contrast examination of sinus tract
- Clinical Application: Used to evaluate fistulous tracts and their communications
Ductogram
- Purpose: Imaging of the breast lactiferous duct
- Clinical Uses: Evaluation of nipple discharge and intraductal lesions
Q&A
Which of the following is a feature of an intravenous contrast agent?
- IV contrast is ionic with high osmolarity.
- IV contrast is metabolized by the liver and excreted in the stool.
- IV contrast opacifies structures based on the amount of blood flow.
- IV contrast should be avoided in patients with a GFR of <60 ml/min.
- IV contrast is not a drug and thus does not cause allergic reactions.