CT Protocols Flashcards
What is the contrast volume used for brain post-con CT?
50ml
What is the delay for a post-con brain CT?
5 minutes
What scans are completed for a CT pituitary fossa
Pre contrast brain
Pituitary Fossa
Post contrast brain
What is the contrast volume and delay used in a pituitary fossa CT
75ml @ 3ml/sec
40 second delay
What is the scan range for Pituitary Fossa CT
Base of skull to COW infero-superiorly
Posterior to ethmoid air cells and anterior to mid sphenoid sinus anteroposteriorly
What scans are completed for a CT Orbits?
Pre and post contrast of orbits
What is the contrast volume and scan delay for a post contrast orbits
50ml contrast
2-3 minutes post injection
What is the scan range for CT orbits?
Hard palate to supraorbital ridge
Include nost soft tissue anteriorly and ethmoid air cells posteriorly
What are three common indications for CT Petrous Temporal Bones?
Vertigo
Hearing Loss
Vestibular Disorder
What scans are completed for CT petrous temporal bones?
Non contrast temporal bones
What is the scan range for CT petrous temporal bones?
Mastoid process (Tip on base of temporal bone behind ear) to Sella Turcica - inluce all skin edges
What reconstructions are completed for CT
petrous temporal bones
Left and right temporal bones together
Left and right temporal bones separately
What is the scanning protocol for CT paranasal sinuses?
Non contrast paranasal sinuses
What is the scan range for CT paranasal sinuses
Occlusal plane to top of frontal sinus
What is the DFOV for paranasal sinuses?
skin edge of nose to mastoids