Mechanical Stuff
What is the location on a histogram graph of bone?
What is on the left
Which of the following patient conditions demonstrates high subject contrast?
Fluid retention caused by disease
High fat content
Pneumothorax
Dense bones
What are dense bones
Additive disease processes that would require at least a 35% increase in mA include all of the following except
Paget’s disease.
pleural effusion.
ascites.
pneumonia.
What is Paget's disease
The trapezium is demonstrated without superimposition of other anatomy on a lateral wrist projection when the patient
What is when the patient depresses the distal first metacarpal
All of the following may result in histogram analysis errors except
unusual pathologic conditions.
poor positioning.
motion.
alignment of the anatomic part with the IR.
What is motion
Which technical factor is primarily used to regulate density?
What is mAs
Kyphosis is defined as a(n):
What is an abnormal thoracic curvature with increased convexity
When an image resembles a double exposure, the type of artifact demonstrated is a(n) ______________ artifact
What is a phantom image
What percentage of kVp adjustment doubles the density on an image?
What is 15%
What is the technical adjustment required with the patient condition of emphysema?
+5 kVp
+50%-60% mAs
–8 kVp
+35% mAs
What is -8 kVp
For an AP chest projection obtained in a neonate or infant who is being ventilated with a high-frequency ventilator, the exposure should be obtained
What is anytime
Which of the technical factors is primarily used to regulate contrast?
What is kVp
What is the technical adjustment required with the trauma device of a small to medium plaster cast?
+5 kVp or +25%-30%
+5-7 kVp or +50%-60% mAs
–15-20 kVp
+50% mAs
What is +5-7 kVp or +50%-60% mAs
All of the following are true about windowing except
windowing occurs after the image is displayed on the monitor.
window level adjustments change the contrast of the image.
saving adjusted windowing settings to the PACS system narrows the dynamic range for future viewers.
windowing is referred to as a postprocessing manipulation procedure.
What is window level adjustments change the contrast of the image.
Which of the following technical factors should be chosen when 20 mAs is desired and the patient being imaged has difficulty remaining still?
200 mA at 0.1 sec
400 mA at 0.05 sec
100 mA at 0.4 sec
100 mA at 0.2 sec
400 mA at 0.05 sec
To best demonstrate intraperitoneal air,
the abdomen projection should be taken after a full inspiration.
an AP abdomen projection (lateral decubitus position) should be obtained with the patient lying on the right side.
allow the patient to be positioned upright for 5 to 20 minutes before obtaining the exposure for an upright AP abdomen projection.
the left iliac wing needs to be included in an AP abdomen projection (lateral decubitus position) on a patient with narrow hips.
What is allow the patient to be positioned upright for 5 to 20 minutes before obtaining the exposure for an upright AP abdomen projection.