PA OBLIQUE FINGER (2nd - 5th)
45° oblique view for three-dimensional evaluation of the phalanges and joints
Proyección PA Oblicua de Dedo 2º al 5º
The "Pen Analogy"
To achieve the perfect 45° angle, ask the patient to hold a pen or foam wedge between the fingers. This provides stability and the exact required rotation.
Exposure Factors
45-50
Kilovoltage (kV)
1-2
mAs
100 cm
Distance (SID)
Fine
Focal Spot
No
Grid (Bucky)
Patient Positioning
Place the hand in prone position on the image receptor.
Rotate the finger laterally 45° (away from the thumb).
Extend the finger being examined and separate it from the others.
Use a 45° foam wedge to maintain stability and avoid motion.
Central Ray
PIP Joint
Location: Perpendicular to the proximal interphalangeal (PIP) joint of the affected finger.
Visible Anatomy
Phalanges
Distal, middle, and proximal phalanges visible.
Joints
Open DIP and PIP joint spaces.
Metacarpal
Distal part of the corresponding metacarpal.