Overview
Contrast media enhance visualization of vascular and tissue structures. They include iodinated agents gadolinium based agents and ultrasound contrast. Selection depends on modality and clinical question.
Safety and Reactions
Allergic and idiosyncratic reactions can occur with contrast agents. Screening for risk factors and premedication protocols reduce adverse events. Hydration and renal function assessment are important for iodinated agents.
Dose and Protocols
Contrast dosing and timing affect lesion conspicuity and diagnostic yield. Protocols are tailored to organ system and clinical indication. Optimization balances image quality and patient safety.
Future Innovations
New contrast agents target molecular markers and improve specificity. Lower dose formulations and alternative agents reduce risk. Research explores targeted and theranostic contrast approaches.