# Upper Extremity Image Analysis- Ch 4

joint spaces are parallel to the IR and perpendicular to the CR
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Terms in this set (39)
1. the 2nd-5th metacarpal midshafts demonstrate more midshaft concavity and twice as much soft tissue width on the side of the finger that the anterior surface is rotated toward
2. the 1st and 2nd metacarpal heads are not superimposed, the 3rd-5th metacarpal heads are slightly superimposed and a slight space is present between the 4th and 5th metacarpal midshafts
3. there is no tissue overlap from adjacent digits
4. the IP and MP joints are demonstrated as open spaces, and the phalanges are not foreshortened; the thumb position may vary from a lateral to an oblique position
5. the 3rd MTP joint is in the center of the exposure field
6. the phalanges, metacarpals, carpals, and 1" of the distal radius and ulna are included within the collimated field
1. 2nd-5th digits are separated, demonstrating little superimposition of the proximal bony or soft tissue structures
2. the thumb is demonstrated without superimposition of the other digits and is in a PA to slight oblique position
3. IP joint spaces are open
4. the 2nd-5th metacarpals are superimposed
5. the IP joints are open, and the phalanges are not foreshortened
6. the MP joints are at the center of the exposure field
7. the phalanges, metacarpals, carpals, and 1" of the distal radius and ulna are included in the collimated field
1. the radial and ulnar styloid processes are at the extreme lateral and medial edges
2. the radioulnar articulation is open, and superimposition of the metacarpal bases is limited
3. the anterior and posterior articulating margins of the radius are almost superimposed (within 0.25")
4. the 2nd-5th metacarpal joint spaces are open; the scaphoid is only slightly foreshortened, and the lunate is trapezoidal
5. the long axis of the 3rd metacarpal and the mid-forearm are aligned with the long axis of the collimated field; the scaphoid and half of the lunate are positioned distal to the radius
6. the carpal bones are at the center of the exposure field
7. the carpal bones, 1/4 of the distal ulna and radius, and half of the proximal metacarpals are included within the collimated field