MEDRADSC 3DA3 Lecture Notes - Lecture 5: Cath Database, Diastole, Cardiac Muscle

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

Document Summary

Lecture 5: advanced ct - cardiac ct angiography. Ejection fraction blood ejected from the heart with each pump. Challenges of imaging the heart: small vessels require good spatial resolution, motion requires good temporal resolution, so requires good spatial and temporal res. In each rotation, 64-slices are produced, giving approximately 192 slices per second, 120 mm coverage. Cardiac ct considerations: speed is extremely important in the scanner"s ability to "freeze" the heart, white coat syndrome hr increases when some people see hcp. Ecg gating: even with fast rotation times, the data from a full rotation will limit temporal resolution. Prospective gating: since the heart is a rapidly moving structure, the only way to image structures within it, is if the scanner can scan as fast as the heart beats. All scans are gated to the ecg trace. Heart rate must be below 65 bpm no variability cannot change more than 3 beats on breath hold.