image analysis Flashcards
what is the difference between a preventable and non-preventable artifact?
preventable = can be removed
non-preventable = cannot be removed
common positioning errors for a PA chest XR
-rotation
-incorrect instructions for shoulder placement
-tilt (anterior/posterior tilt)
-poor inspiration
common positioning errors for a left lateral chest XR
-rotation
-incorrect midcoronal and IR alignment
-incorrect arm placement
-tilt (anterior/posterior tilt)
-poor inspiration
any time you ask your patient to move, you should check: ____________
placement/alignment with the CR/IR
for a chest XR, if the patient has lots of abdominal soft tissue, do you have them lean forward to have their chest touch the bucky?
No, this will cause image distortion (shortening or elongating)
chest XR analysis: what does superior midcoronal plane tilting anteriorly create?
“super long” lungs, with lots of lung field above the clavicles
chest XR analysis: what does superior midcoronal plane tilting posteriorly create?
“super short” lungs, with little lung field above the clavicles
Chest XR analysis: the side with elongated clavicles is the side of the chest positioned ___________
farthest from the IR
Chest XR analysis: the side with shortened clavicles is the chest positioned __________
close to the IR
foreshortening analysis with chest and abdomen x-rays are (same/opposite)
opposite
for abd XR: The narrower iliac wing is the side of the patient positioned ______________
farther from the imaging table and IR
for abd XR: elongated side of the patient is the side positioned ________________
closest to the imaging table and the IRa
on a chest XR taken on exhalation we see the following:
heart is wider, not all 10 ribs are above diaphragm/in lung field, tissue denser (not as much air in lungs)
a PA chest with patient rotated in RAO demonstrates
elongated left posterior ribs
manubrium located at the level of the fifth thoracic vertebra or lower demonstrates __________
the patient’s midcoronal plane tilted anteriorly
manubrium located above level of the fourth thoracic vertebra demonstrates __________
posterior midcoronal plane tilting
a rotated lateral chest XR with the right thorax rotated anteriorly with show this:
-fundus gastric bubble
-heart shadow “behind” sternum
a rotated lateral chest XR with the left thorax rotated anteriorly with show this:
-heart shadow continues “beyond” sternum
Which of these necessitates a repeated AP upright abdomen?
Symphysis pubis not demonstrated on radiograph
Erect marker not seen on radiograph
Four-side collimation not evident on radiograph
Diaphragm not demonstrated on radiograph
Diaphragm not demonstrated on radiograph
according to instructor, is not including the marker in an otherwise perfect XR nondiagnostic?
no, it is diagnostic
accurate PA Chest positioning ________ the clavicles placing the _______________________
lowers, lateral and medical ends of the clavicle on the same horizontal plane
a PA chest with patient rotated in LAO demonstrates
elongated right posterior ribs
on a left lateral chest XR, if you see the gastric air bubble of the fundus of the stomach, what has happened?
right thorax is rotated anteriorly
on a left lateral chest XR, lung tissue anterior to the sternum demonstrates what? will this happen in rotation the opposite way?
right lung rotated forwarded, not shown in left lung rotated forward