all the protocol shiz

recent practice favours programming slices of the brain parallel to the _______ as opposed to _______ because it ______________

recent practice favours programming slices of the brain parallel to the _______ as opposed to _______ because it ______________

supraorbital meatal line

;orbital meatal line

;reduce rad exposure to lens of eyes

due to the skulls dense bone _________ is common in the ____________

beam hardening artifact is common

;posterior fossa

Why should Technologusts be able to recognize some pathologic changes on images

to bring to radiologist attention ASAP if critical

what type of CM Injection is used for neck imaging unless contradinidcated

IV

what is the goal of scanning the neck

allow suficient time for contrast administration to enhance

-muscosa

-lymph nodes

-pathological tissue

but still get this images while the vascualture remains opacified

when CT is performed after intracatheral contrast administration for flouroscopic myelography a scan delay of ___________ is recomended to allow contrast to dilute

1-3 hours

evidence of intracranial hemorrhage on pre treatment non contrast head contradicts what

t-pa therapy

t-pa must be given within

3 hours from first sign of stroke

to differentiate a hemorrhagice and ischemic, assess the state of cerebral cirulation and tissue stroke__________ is routinely performed

non-contrast CT of the brain

secondary reason for a non contrast brain in a stroke patient

assess underlying condition

_________ are obtained by monitoring the passage of ___________ through the cerebral vasculature

perfusion studies; cerebral vasculature

start location CT head

-base of skull

end location CT head

just above vertex

-intracranial hemorrhage- early infarction-dementia- cerebral trauma -hydrocephalousare all clinical indications for a

non contrast head

scans acquired head w contrast

pre and post injection

mass lesionAVMmetastatis anuerysmheadacheseizureall are clinical indications for

head scan with and without contrast

acquired scout images for the head

APLateral

what type of scan is the head

axial

scan plane head

transverse

for a contrast head _________ @ _______/s is administered with a ________ scan delay

100ml;1.0ml/s; 5 minute

for a head scan the _____ angle is paralell to the __________

gantry;supraorbital meatal line

dvof head

23cm

algorithm head

standard

posterior fossa ww/wL

140 ww/ 40 wl

vertex ww/wl

90ww/30wl

reconstruction algorithm head

bone

reconsruction ww/wl for the head

4000ww/400wl

64 detectorgantry rotation time head

1,0s

head reconstruction (slice thickness/interval)

5.00mm/5mm 4 images per rotation

slice thikcness/over interval reconstructed head

2.5mm/2.5mm

what would be the clinical indication of this scan without contrast

intracranial hemorrhage,

early infarction,

dementia,

hydrocephalus,

cerebral  trauma 

clinical indications of this scan with contrast

 Mass,

lesion,

arteriovenous malformation,

metastasis,

aneurysm,

for symptoms of headache,

seizure

what is the anatomy of interest

posterior fossa (base of skull)

clinical indications for this scan

 Posterior fossa and brainstem tumors, hemorrhages, AVM, dural sinus, thrombosis

what area is being scanned

temporal bones

clinical indications for this scan without contrast

 cholesteatoma,

inflammatory disease,

fractures,

evaluate implants

 clinical indications for this scan w contrast

IAC tumor,

hearing loss,

acoustic neuroma,

schwannoma

clinical indications for this scan

recurrent or chronic sinustitis

clinical indications for this scan

characterization of facial features and soft tisseue injury

clinical indications of this scan without contrast

trauma

foreign body

clinical indications for this scan with contrast

intraorbital masses,

thyroid ophthalmopathy,

inflammation,

infection

this scan shows the

sella turcica

what study is this

brain perfusion

What is the standard brain window setting?

90ww/35wl

what would be performed on a patient with one of the following clinical indications

locate cerebral aneurysm

AVM in SAH/ICH patients

circle of willis scan

what scans are protocol for imaging the circle of willis

non contrast head

arterial phase scan

start and end point to image circle of willis

start-just above frontal sinus

end-just below skull vertex

to image the circle of willis ______ml (370 concentration) of contrast is administered at ______ml/s _____mls of _____ is administered at _______ml/s

60

;4.0

;20

;saline

;4.0

scan delay and ROI for COW

bolus timing

carotid artery approx level of c4

reference angle COW

no gantry tilt

COW

DFOV

SFOV

-25cm

-head

Algorith for COW scan

standard

window settings circle of willis

140ww/40wl posterior fossa

90ww/35wl vertex

Reconstruction (slice thickness/interval) COW

1.25mm/0.625

KVp/mA COW

120/500

Reformations COW

Coronal and Sagittal

Reconstructed DFOV COW

18

COW reconstruction slice thickness/spacing

2.0mm/2.0mm

Render mode COW reconstruction

MIP

Circle of Willis/carotid study clinical indications

Acute stroke

carotid atherosclerosis

Carotid dissections

For a CTA of the Circle of Willis/carotid _______ is the start location and ______ is the end location

Just below aortic arch

;

Just above frontal sinus

______ml (370 concentration) at ______ml/s _______ml saline at ________ml/s is administered for imaging COW/carotid with a _________ scan delay

80

;4.0

;40

;4.0

;timing bolus

COW/Carotid

DFOV

SFOV

25cm

;

Large body

COW/Carotid algorithm

Standard

Window settings for COW/carotid study

Vertex-90ww/35wl

Base of skull-140ww/40wl

Foramen magnum-250ww/30wl

COW/carotid reconstruction (slice thickness/ interval)

1.25mm/0.625

COW carotid reformations window setting

800ww/200wl

COW/Carotid reformation slice thickness/spacing

2.0mm/2.0mm

Reformation rendermode COW/Carotid

MIP

COW/carotid reformation DFOV

20cm

Soft tissue neck clinical indications

Neck mass

Vascular abnormality

Scout images for soft tissue neck study

AP and lateral

Scan plane soft tissue neck

Transverse

Soft tissue neck start and end location

Start-mid orbit

End-clavicular heads

___mL at _____mL/s of IV contrast

________ 1st inject________ at ____ delay 2nd inject _________ at ____ after start of 2nd injection

125mL

;1.5

;5-ml

;2 minute delay

;75ml

;25s

Soft tissue neck study reference angle

Angle gantry parallel to hard palate

Soft tissue neck

DFOV

SFOV

-18cm

;large body

Soft tissue neck algorithm

Standard

Window settings for soft tissue neck

350ww/50wl

Soft tissue neck reconstruction slice thickness/interval

2.5mm/1.25mm

Soft tissue neck kVp/ auto mA

120/150-800

Reconstruction algorithm soft tissue neck

Bone

Clinical indications for a cervical spine survey

Fracture

Dislocation

Cervical spine study clinical indications

Fracture

Dislocation

Cervical spine scan plane

Transverse

Cervical spine study start and end location

Start-just above skull base

End-mid t1

What anatomy must be include on a c spine study

All of c spine unless another level indicated

When is IV contrast administered for a cervical spine study

When it is specifically requested

When requested for a c spine study if contrast is given a dose of ___ml at ______ml/s with images taken _____

100ml;

1.5;

When injection is complete

C spine study reference angle

No gantry tily

C spine study

DFOV

SFOV

-13

;large body

C spine study algorithm

Standard

Windowing for c spine study

350ww/50wl