What type of contrast is typically used in conventional angiography?

• A. Osmotic contrast
• B. Iodinated contrast
• C. Magnetic contrast
• D. Non-ionic contrast

Answer: (B)

In conventional angiography, iodinated contrast agents are the standard choice due to their excellent visibility on X-ray imaging. These agents contain iodine, which has a high atomic number, allowing it to absorb X-rays effectively. This property is crucial for enhancing the contrast between the blood vessels and surrounding tissues when images are captured.

Iodinated contrasts come in various formulations, including ionic and non-ionic varieties, but the core component that enables the imaging is iodine. Generally, non-ionic iodinated contrast agents are preferred in many clinical settings because they tend to have fewer side effects and lower osmolality compared to their ionic counterparts.

Other options like osmotic contrast and magnetic contrast are not relevant in the context of conventional angiography. Osmotic contrast is not a recognized category of contrast media, while magnetic contrast is typically associated with magnetic resonance imaging (MRI), not X-ray-based imaging techniques like angiography.