MEDRADSC 3DA3 Lecture 4: Medradsc 3DA3 Lecture 4

• School: McMaster University
• Department: Medical Radiation Sciences
• Course: MEDRADSC 3DA3

Document Summary

Stenosis, aneurysm and pe (pulmonary embolism), dissection, svco. Oral contrast: gi perforation, bleed, ischemia -water : omnipaque, rectal: omnipaque. Breathing technique: deep inspiration, valsalva maneuver, both lead to transient interruption (false positive in pe studies) Iv contrast: 18-20 gauge, 4-6 ml/s, antecubital, higher contrast so high viscosity, higher rate of injection-lower concentration of contrast (slide 27, high flow rate for cta. Ct pulmonary angiogram: susceptible to motion- caudo-cranial test bolus, monitoring slice taken just below carina to include pa. Cta renals: peak enhancement : 18-27 secs. Large volume and high flow rate of contrast.