image analysis

Question 1

what is the difference between a preventable and non-preventable artifact?

Answer 1

preventable = can be removed
non-preventable = cannot be removed

Question 2

common positioning errors for a PA chest XR

Answer 2

-rotation
-incorrect instructions for shoulder placement
-tilt (anterior/posterior tilt)
-poor inspiration

Question 3

common positioning errors for a left lateral chest XR

Answer 3

-rotation
-incorrect midcoronal and IR alignment
-incorrect arm placement
-tilt (anterior/posterior tilt)
-poor inspiration

Question 4

any time you ask your patient to move, you should check: ____________

Answer 4

placement/alignment with the CR/IR

Question 5

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?

Answer 5

No, this will cause image distortion (shortening or elongating)

Question 6

chest XR analysis: what does superior midcoronal plane tilting anteriorly create?

Answer 6

“super long” lungs, with lots of lung field above the clavicles

Question 7

chest XR analysis: what does superior midcoronal plane tilting posteriorly create?

Answer 7

“super short” lungs, with little lung field above the clavicles

Question 8

Chest XR analysis: the side with elongated clavicles is the side of the chest positioned ___________

Answer 8

farthest from the IR

Question 9

Chest XR analysis: the side with shortened clavicles is the chest positioned __________

Answer 9

close to the IR

Question 10

foreshortening analysis with chest and abdomen x-rays are (same/opposite)

Answer 10

opposite

Question 11

for abd XR: The narrower iliac wing is the side of the patient positioned ______________

Answer 11

farther from the imaging table and IR

Question 12

for abd XR: elongated side of the patient is the side positioned ________________

Answer 12

closest to the imaging table and the IRa

Question 13

on a chest XR taken on exhalation we see the following:

Answer 13

heart is wider, not all 10 ribs are above diaphragm/in lung field, tissue denser (not as much air in lungs)

Question 14

a PA chest with patient rotated in RAO demonstrates

Answer 14

elongated left posterior ribs

Question 15

manubrium located at the level of the fifth thoracic vertebra or lower demonstrates __________

Answer 15

the patient’s midcoronal plane tilted anteriorly

Question 16

manubrium located above level of the fourth thoracic vertebra demonstrates __________

Answer 16

posterior midcoronal plane tilting

Question 17

a rotated lateral chest XR with the right thorax rotated anteriorly with show this:

Answer 17

-fundus gastric bubble
-heart shadow “behind” sternum

Question 18

a rotated lateral chest XR with the left thorax rotated anteriorly with show this:

Answer 18

-heart shadow continues “beyond” sternum

Question 19

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

Answer 19

Diaphragm not demonstrated on radiograph

Question 20

according to instructor, is not including the marker in an otherwise perfect XR nondiagnostic?

Answer 20

no, it is diagnostic

Question 21

accurate PA Chest positioning ________ the clavicles placing the _______________________

Answer 21

lowers, lateral and medical ends of the clavicle on the same horizontal plane

Question 22

a PA chest with patient rotated in LAO demonstrates

Answer 22

elongated right posterior ribs

Question 23

on a left lateral chest XR, if you see the gastric air bubble of the fundus of the stomach, what has happened?

Answer 23

right thorax is rotated anteriorly

Question 24

on a left lateral chest XR, lung tissue anterior to the sternum demonstrates what? will this happen in rotation the opposite way?

Answer 24

right lung rotated forwarded, not shown in left lung rotated forward