CT REGISTRY REVIEW: CT PROCEDURES EXAM UPDATE 2024 WITH CORRECT ANSWERS |A+ GRADE

CT REGISTRY REVIEW: CT PROCEDURES EXAM
UPDATE 2024 WITH CORRECT ANSWERS |A+
GRADE



How should the gantry be tilted for scans of the brain?
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ANS: Parallel with the Supra orbital meatal line
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What is the most common acquisition for a CT of the head?
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ANS: axial technique
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What are the two main ways a coronal head scan can be
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done?
g ANS: Prone with chin forward or supine with
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head tilted as far back as possible
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Since the posterior fossa of the skull is so dense, what can be
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done to overcome the streak artifact?
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Decreasing slice thickness and increasing kVp
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What is a common slice thickness for scanning the posterior
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fossa?
g ANS: 1.25 mm
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What are some benefits of helical acquisition of brains?
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ANS: 3D post processing and and reduce motion artifact
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,What is the standard soft tissue window of the brain?
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ANS: 160ww/40wl
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What are common indications for a ct scan of the head?
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ANS: Rule out intracranial hemorrhage, acute changes in
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neurological and mental status, traumas
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A hyper dense brain hemorrhage...
g g g g gggggggggg ANS: Onset 3 days ggg g g




A hyper dense center with hyperdense and hypo dense
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areas...
g ANS: 4-10 days
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Hypodense gggggggggg ANS: 6 months and beyond ggg g g g




Why might contrast be used for a ct scan of the brain?
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ANS: Infection, neoplasm, or venous malformation
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What thickness of slices are used to reduce beam hardening
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artifact through the posterior fossa and vertex
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5mm and above
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What is the most common reason for scanning facial bones?
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ANS: Facial Trauma
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, What is the typical slice thickness for a scan of the facial
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bones?
g ANS: 2-3 mm
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When performing CT Orbits, how should the images be
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acquired?
g ANS: Parallel to the IOML
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Why might contrast be used for orbits?
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Infection, ophthalmopathy, mass, vascular abnormalities
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Why might orbits be scanned without contrast?
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Traumas, foreign body
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What's the scan range for orbits?
g g g g g gggggggggg ANS: From below ggg g



orbital floor to above orbital roof
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Why might contrast be used for a scan of the sinuses?
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ANS: Infection, mass, or vascular abnormalities
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What's the most common indication for a scan of the
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sinuses?
g ANS: sinusitis
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