Image Analysis Exam 4 (CH 4)

What is the most common rotational error for the fingers

External rotation

As the finger is rotated medically for a PA oblique, the amount of concavity increases on the side that the anterior surface is rotated __ and decreases on the side that the posterior surface is rotated _

Toward, toward

For a PA finger, the soft tissue width and mid shaft concavity should be __ on both sides of the phalanges

Equal

For a PA finger, there should be no __ overlap from adjacent digits

Soft tissue

For a PA finger, the __ and _ joints are demonstrated as open spaces

IP and MCP

What should be at the center of the exposure field for PA finger

PIP joint

What should be included within the exposure field for PA finger

Finger and half of the MC

For a PA finger, if the anterior surface is rotated toward the longest 2nd MC or thumb, the finger was __ rotated

Externally

Joint spaces in the hand/fingers should be aligned __ with the IR

Perpendicular

If the finger is flexed or tilted toward the IR, the CR will be poorly aligned with the joint spaces and phalanges, causing the phalanges to foreshortened and be superimposed on the joint spaces, __ them

Closing

If the patient is unable to extend the finger for a PA finger projection, what should be done

It may be best to use the AP projection to demonstrate open joint spaces and reduce foreshortening

For a PA oblique finger, if the phalangeal mid shaft concavity and soft tissue width on both sides of the digit are more nearly equal, the finger was rotated (more or less) than 45 degrees

Less than

For a PA oblique finger, if the soft tissue width on one side of the digit is more than twice as much as that of then the other side, and when one aspect of the phalangeal mid shaft is concave but the other aspect is slightly convex, the finger was rotated (more or less) than 45 degrees

More

For a PA oblique finger, __ as much soft tissue width should be demonstrated on one side of the phalanges as on the other side

Twice

For a PA finger oblique, more __ should be seen on one aspect of the phalangeal midshafts than the others

Concavity

For a PA finger oblique, __ and _ joints are demonstrated as open spaces and there is no overlap from other fingers

IP and MCP

What should be at the center of the exposure field for PA oblique fingers

PIP joint

What should be included in the exposure field for PA oblique fingers

Finger and half of the MC

For lateral fingers, an extending device should only be used to extend the finger if the device can be positioned __ to the injured area

Proximal

For a lateral finger, if a positioning device cannot be placed proximal to the injury, what should be done

Leave the finger as is

For a lateral finger, the anterior surface of the middle and proximal phalanges demonstrate midshaft __ and the posterior surfaces show slight _

Concavity, convexity

For lateral fingers, more than __ as much soft tissue width should be demonstrated on the anterior surface than the posterior surfaces

Twice

For a lateral finger, the __ joints are demonstrated as open spaces

IP

For a lateral finger, what is at the center of the exposure field

PIP joint

What should be included within the exposure field for a lateral finger

Entire finger and MC head

For lateral fingers, the (Medial or lateral) surface of the hand should rest on the IR for 2nd and 3rd digits and the (medial or lateral) surface of the hand should rest on the IR for 4th or 5th digits

Lateral, medial

For an AP thumb, when the thumb is rotated away from the AP projection, the amount of phalangeal midshaft concavity and soft tissue width increases on the side of the thumb that the anterior thumb surface rotates __

Toward

For an AP thumb, concavity on both sides of the phalanges and MC midshafts should be __

Equal

For an AP thumb, what should be seen as open spaces

IP, MCP, and CM joints

For an AP thumb, superimposition of the medial palm soft tissue over the proximal first MC and the CM joint should be __

Minimal

What should be at the center of the exposure field for an AP thumb

MCP joint

What should be included within the exposure field for an AP thumb

Phalanges, MC, and CM joint

For an AP thumb, using the unaffected hand, draw the __ away from the thumb without rotating the thumb from the AP projection

Medial palmar surface