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CT Procedures > Head/Neck > Flashcards

Head/Neck Flashcards

1
Q

What is the slice thickness for a CTA head/neck

A

0.5-1.5mm

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2
Q

What is the injection rate for the bolus for a CTA head

A

3-4 ml/s

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3
Q

If not using an ROI for a CTA head, what is the delay time

A

10-20 seconds

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4
Q

What is being evaluated in a CTA head

A

the circle of willis

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5
Q

Portions of the circle of willis

A

anterior and posterior cerebral arteries
anterior and posterior communicating arteries
internal carotid arteries (ICAs)

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6
Q

What is being evaluated in a perfusion study

A

level of blood flow through the brain

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7
Q

what is cerebral blood volume (CBV)

A

quantity of blood flow through 100g of brain tissue

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8
Q

what is cerebral blood flow (CBF)

A

volume of blood that moves through 100g per min

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9
Q

what is avg CBV

A

4-5ml/100g

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10
Q

what is avg CBF

A

50-60ml/100g/min

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11
Q

how much contrast is in the bolus for a perfusion study

A

50ml

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12
Q

what is the injection rate for a perfusion study

A

4-7ml/sec over 45-60 sec

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13
Q

what is the slice thickness for a ST neck

A

3-5mm

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14
Q

what size SFOV is used for a ST neck

A

medium-large

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15
Q

what is the DFOV for a ST neck

A

18-25cm

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16
Q

what are the avg WL and WW for a ST window for a ST neck

A

WL: 50 WW: 400

17
Q

what are the avg WL and WW for a bone window for a ST neck

A

WL: 300 WW: 2000

18
Q

how much contrast is used for a ST neck

A

50-150ml

19
Q

what is the injection rate for a ST neck

A

1-3ml/sec

20
Q

how long is the delay for a ST neck

A

30-60 sec

CT Procedures (4 decks)

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