Uniformity test - Answer Water phantom is used in this test to get the same Hounsfield
units on entire image
Accuracy test - Answer Test of accuracy of the CT numbers or calibration
standard deviation - Answer Measures noise, mottle, or graininess in image
Linearity test - Answer The relative a...
Uniformity test - Answer Water phantom is used in this test to get the same Hounsfield
units on entire image
Accuracy test - Answer Test of accuracy of the CT numbers or calibration
standard deviation - Answer Measures noise, mottle, or graininess in image
Linearity test - Answer The relative accuracy between calculated CT numbers and their
respective linear attenuation coefficient
7-25 mg/dL - Answer normal range for BUN
Aliasing artifact - Answer A form of streak artifact caused by an insufficient number of
views obtained during data acquisition
Cyst - Answer Abnormal saclike structure filled with fluid or gas
subdural hematoma - Answer Bruise between the skull and the scalp
Basilar skull fracture - Answer Raccoon eyes (periorbital ecchymosis) and Battle's sign
(mastoid ecchymosis). Fracture of the base of the skull. CSF leakage or dural tears.
Ping-Pong Fracture - Answer A type of depressed skull fracture usually seen in young
children; when elevated it resumes and retains its normal position.
,type 1 lefort fracture line - Answer superior to occlusal line on maxilla, horizontal line
even with nasal. Cross top row of teeth.
Type 2 LeFort fracture - Answer Portion of medial and inferior walls of the orbit is
fractured, triangular
Type 3 LeFort - Answer Medial, inferior, and lateral walls orbit fractured. Across orbits.
falx cerebri - Answer separates the two cerebral hemispheres saggitally
tentorium - Answer separates cerebrum from cerebellum
lateral fissure - Answer separates temporal lobe from frontal and parietal lobes
Ventricles - Answer What stores CSF in brain?
400 WW and 40 WL - Answer Normal window width, and window level for soft tissue in
abdomen
DFOV/matrix size - Answer formula for pixel size:
Window width - Answer Total number of displayed houndsfield units
window level - Answer Centerpoint for all Hounsfield units values
, diverticulosis - Answer the chronic presence of an abnormal number of diverticula in the
colon and/or rectum
Diverticulitis - Answer inflammation of the diverticula
pleural empyema - Answer collection of pus in the pleural cavity, CT aspiration is
performed to treat
produce bile for fat digestion - Answer Function of the biliary system (liver, gall bladder,
and associated ducts)
Converts raw data to image data - Answer What is the function of a reconstruction
algorithm?
sacral hiatus - Answer Inferior opening of the sacral canal. Anesthetics can be injected
here
acoustic neuroma - Answer benign tumor on the auditory nerve (8th cranial nerve) that
causes vertigo, tinnitus, and hearing loss
Right kidney and right adrenal gland and vice versa - Answer What structures do the
right renal artery feed?
Thinnest axial slices and lowest interval possible - Answer What kind of images do you
need for image reconstruction?
qualitative analysis - Answer a review of the health record to ensure that standards are
met and to determine the adequacy of entries documenting the quality of care
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