Procedure Flashcards
What degree is acquisition performed for CT brain in order to reduce orbital dose and minimize beam hardening artifact?
15 degrees above the IOML
When is contrast preferred in CT brain?
Arteriovenous malformation, suspected neoplasm, or attn to pituitary gland
What is the centrall volume principle in CT perfusion??
CBF= CBV/MTT
what is the normal range of cerebral blood flow through 100g of brain gray matter?
50-60mL/ 100g/min
what is the range of cerebral blood volume in the brain?
4-5mL/100g of brain tissue
A brain parenchyma with ____mL/100g and below is considered as infract core
2.5
The type of hemorrhage that occurs between the skull and outer layer of the dura in traumatic brain injury is referred to as a(n):
Epidural hematoma
The tortuous S-shaped portion of the internal carotid artery as it enters the bony skull may be referred to as the carotid:
Carotid Siphon
Which of the following types of CT scanners is best suited for the evaluation of coronary artery disease?
Electron beam CT
A solitary pulmonary nodule can be assumed benign when its average density is within which of the following ranges?
160-200 Hu
What are the 3 contrast that can be used during a chest scan?
- Diatrizoate meglumine
- Barium sulfate
- Iopamido
what is the drawback of Multidetector CT?
Increases pt’s dose
For a given CTA examination of the pulmonary arteries, 100 mL of a low-osmolar iodinated contrast agent is administered at a rate of 4 mL/sec. Peak pulmonary artery opacification should occur at approximately:
20-25sec
Prospectively gated cardiac CT data acquisition occurs only during the portion of the ECG termed the:
T wave
For MDCT, identified areas of calcium must demonstrate relative attenuation values greater than:
130Hu
