Exams
Upper Extremity

Thumb

3 default · 0 custom

Quick technique

kVp
55–60
mAs
1–2
SID
40 in
Grid
No
Detector
Small DR field, collimated to thumb.
Breath
Not critical.

Views

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IMAGE RECEPTOR
Verified positioning image coming soon

We only show verified diagrams for the correct projection. A licensed asset for this view hasn’t been added yet.

Placeholder
Patient position
Seated, hand internally rotated for AP.
Part position
Hand internally rotated until posterior surface of thumb rests on detector.
Central ray
Perpendicular to the 1st MCP joint.
IR placement
Small DR field, collimated to thumb.

TechniqueDefault

kVp
55–60
mAs
1–2
SID
40 in
Grid
No
Breath
Not critical.
Detector
Small DR field, collimated to thumb.

Custom values save locally on this device. Cloud sync & department sharing coming soon.

Anatomy coverage

Entire thumb including trapezium and 1st CMC joint.

Tech pearls

  • Robert's method (true AP of 1st CMC) is excellent for arthritis evaluation.
  • For oblique, abduct the thumb and place palm flat — natural 45°.

Image evaluation

  • Open 1st MCP and IP joints
  • Trapezium and 1st CMC included
  • True AP: no rotation of phalanges

Common mistakes

  • Imaging PA instead of AP
  • Cutting off the trapezium
Open Reject Examples for this view
Manual teaching workflow · real AI coming soon

Facility custom views

Add views your department uses — saved locally per exam

Anatomy overview

Distal/proximal phalanx1st metacarpalTrapezium1st CMC joint
Open region anatomy atlas

Protocol controls

Open Protocol Builder
Manage facility kVp/mAs, radiologist prefs, trauma rules