Ct nmtcb UPDATED ACTUAL Questions and CORRECT Answers
Imaging of cranial blood vessels circle of Willis
Scan is caudocranial from C2 to 1cm above the dorsum
Brain ct myelography
sella
Bolus tracking
Both intracranial and extracranial vessels included which
Ct angiography
extend from the aortic arch through circle of Willis
Pre contrast of the head
Ct perfusion- acute stroke CTA of the brain and carotid arteries
CT perfusion imaging
The quantity of blood in ml contained within 100g volume
CBV
of brain tissue. Normal is 4-5ml/100 g
Quantity of blood flow that moves through a 100g of brain
CBF (cerebral blood flow) tissue each minute. Normal range in gray matter is 50-60
ml/100g/min
Time in sec for blood to pass in a given tissue CBF =
mean transit time (MTT)
CBV/MTT
Región where CBV is greater than 2.5
Penumbra
Infarct core less than 2.5
Gantry parallel to hard palate superior orbital rim to hard
palate
Soft tissue of neck
Inflammation of swollen glands
Infection abscess malignant and trauma
Axial plane, parallel to the plane of the vocal cords
Images from hyoid bone to cricoid cartilage
Larynx
Got vocal cords low steady "EEE"
Contrast for lymph nodes, tumor, and vasculature
Indications: stenosis, occlusion, aneurysm, and trauma
Images from Carotid arch to skull base
Kvp of 80-100 Can improve visualization of vessel
, Infusion on right arm to avoid streak artifacts from left
vasculature
Carotid CT Angiography
Delay 15-18 seconds
Noncontrast helical axial neck
CTA neck 50-75ml of non ionic contrast at 4ml/sec with 12-15 delay
Helical CTA 80-120kVp , 350 mA /0.8 sec
Above lung apices to costophrenic angles if disease pro-
gression scan should proceed through adrenal glands
80-120kvp,40-300 maa
Lung and mediastinum
High spatial frequency for airway disease, bone Mets, and
fracture of thorax not for small pulmonary nodules
Oral bail for visualization of the esophagus
Demostraste diffuse lung disease
Indications: emphysema, sarcoidosis, cystic fibrosis, COPD
and asthma
High resolution CT of lungs
Small DFOV to include king parenchyma
Expiration to demonstrate air trapping in patients with
suspected small airway disease
Helical scan though thorax superior diaphragm to the
apex of lungs
CTPE
Caudocephalic
80-150 ml of contrast
Assessment of atherosclerotic disease
Prospective gating R-R interval triggered for data to occur
only during T wave of ECG
CAC
1-10: minimal
11-100: mild
101-400: moderate
2/5
Imaging of cranial blood vessels circle of Willis
Scan is caudocranial from C2 to 1cm above the dorsum
Brain ct myelography
sella
Bolus tracking
Both intracranial and extracranial vessels included which
Ct angiography
extend from the aortic arch through circle of Willis
Pre contrast of the head
Ct perfusion- acute stroke CTA of the brain and carotid arteries
CT perfusion imaging
The quantity of blood in ml contained within 100g volume
CBV
of brain tissue. Normal is 4-5ml/100 g
Quantity of blood flow that moves through a 100g of brain
CBF (cerebral blood flow) tissue each minute. Normal range in gray matter is 50-60
ml/100g/min
Time in sec for blood to pass in a given tissue CBF =
mean transit time (MTT)
CBV/MTT
Región where CBV is greater than 2.5
Penumbra
Infarct core less than 2.5
Gantry parallel to hard palate superior orbital rim to hard
palate
Soft tissue of neck
Inflammation of swollen glands
Infection abscess malignant and trauma
Axial plane, parallel to the plane of the vocal cords
Images from hyoid bone to cricoid cartilage
Larynx
Got vocal cords low steady "EEE"
Contrast for lymph nodes, tumor, and vasculature
Indications: stenosis, occlusion, aneurysm, and trauma
Images from Carotid arch to skull base
Kvp of 80-100 Can improve visualization of vessel
, Infusion on right arm to avoid streak artifacts from left
vasculature
Carotid CT Angiography
Delay 15-18 seconds
Noncontrast helical axial neck
CTA neck 50-75ml of non ionic contrast at 4ml/sec with 12-15 delay
Helical CTA 80-120kVp , 350 mA /0.8 sec
Above lung apices to costophrenic angles if disease pro-
gression scan should proceed through adrenal glands
80-120kvp,40-300 maa
Lung and mediastinum
High spatial frequency for airway disease, bone Mets, and
fracture of thorax not for small pulmonary nodules
Oral bail for visualization of the esophagus
Demostraste diffuse lung disease
Indications: emphysema, sarcoidosis, cystic fibrosis, COPD
and asthma
High resolution CT of lungs
Small DFOV to include king parenchyma
Expiration to demonstrate air trapping in patients with
suspected small airway disease
Helical scan though thorax superior diaphragm to the
apex of lungs
CTPE
Caudocephalic
80-150 ml of contrast
Assessment of atherosclerotic disease
Prospective gating R-R interval triggered for data to occur
only during T wave of ECG
CAC
1-10: minimal
11-100: mild
101-400: moderate
2/5
