MEDRADSC 3C03 Study Guide - Midterm Guide: Hives, Extracellular Fluid, Microbubbles

• School: McMaster University
• Department: Medical Radiation Sciences
• Course: MEDRADSC 3C03
• Professor: Meaghan Jefferson

Document Summary

Advantages / disadvantages of modalities - ie) tissue type. Types of contrast agents - positive & negative. X-ray contrast: iodinated (ionic & non-ionic - both positive), non-iodinated (barium = positive, co2 = negative) Mri contrast: gadolinium (positive), ionic & non-ionic (but non-ionic not often used) Low viscosity - good for angio procedures (less chance of clots) Higher osmolality - draws fluid from interstitial spaces. Organic compounds, more covalent bonds bound to iodine, does not dissolve into ions. Higher viscosity - issues in neurological procedures in small vessels - can induce clotting & stenosis. Lower osmolality - lower incidence of injuries from fluid movement. More covalent bonding = more stable molecule = doesn"t break down into ions/particles. C+ in blood vessels - increases volume in vessels. Extracellular fluid is going to increase the fluid into the vessels - causing contrast reactions.