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Table 2 Landmarks at standardized ultrasound examination of wrist and MCP joints

From: Feasibility of a standardized ultrasound examination in patients with rheumatoid arthritis: a quality improvement among rheumatologists cohort

Position Landmarks
Wrist dorsal central The third extensor digitorum tendon, tip of radius, carpometacarpal joint, os lunatum and os capitatum.
Wrist dorsal radial The extensor carpi radialis longus tendon, tip of radius, carpometacarpal joint, os scaphoideum and os trapezoideum
Wrist dorsal ulnar The middle of caput ulnae placed minimum 1 centimetre from the right side and minimum 2 from the left side of the image margins
Wrist volar central N. medianus, tip of radius, radiocarpal and intercarpal joints
MCP* dorsal radial Joint space, diaphysis of the metarcarpal and proximal phalanx bones. The joint space has to be placed minimum 2 centimetre from the right side and minimum 1 centimetre from the left side of the image margins
MCP* dorsal ulnar Joint space, diaphysis of the metarcarpal and proximal phalanx bones. The joint space has to be placed minimum 2 centimetre from the right side and minimum 1 centimetre from the left side of the image margins
MCP* joint volar Joint space and flexor tendon. The joint space has to be placed minimum 2 centimetres from the right side and minimum 1 centimetre from the left side of the image margins.
  1. * Metacarpophalangeal joint