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Department of Podiatry

Xray Foot Charting

Dorso-Plantar Views

The views below are overlaid with lines indicating angles commonly calculated from foot radiographs. The lines have been drawn thicker than usual to aid visualisation.

	Talo-Calcaneal angle Ideal average measurement: 17-20°: Angle formed by collum tali axis and longitudinal axis of rearfoot. Angle increases above 21° when foot is pronated further from a resting position Angle decreases below 16° when foot is supinated further from a resting position
	The Forefoot Angle Ideal average measurement:(8 degrees)-Angle formed by metatarsal axis (line joining bisection of distal and proximal regular shaft of 2nd metatarsal) and the longitudinal axis of the rearfoot (line joining distal middle portion of calcaneus and center posterior aspect of calcaneus. -Angle increases with forefoot adduction 12-14 degrees=Forefoot adductus <12 degrees= Straight erectus foot
	Lesser Tarsus Axis (1) line joining distal medial point of medial cuneiform and proximal medial portion of navicular. (2) line joining distal lateral point of cuboid and proximal lateral point of cuboid (3) line joining bisection of (1) and (2) (4) Line perpendicular to bisection of line (3)
	Calcaneocuboid Angle Ideal average measurement:(0-5 degrees) (1) line along lateral distal margin of calcaneus (2) line along lateral distal margin of cuboid Angle increases with foot pronation
	Lesser Tarsus angle a) Lesser tarsus axis b) Longitudinal axis of the rearfoot (note the longitudinal axis has been translated to the right)
	Intermetatarsal Angle Ideal average measurement: 8° Line joining bisection of distal and proximal regular shafts of metatarsals one and two. The lesser intermetatarsal angles are not usually measured. Rectus >14 degrees Metatarsus adductus/forefoot adductus=12 degrees
	Hallux Abductus Angle Ideal average measurement: <15° Angle formed bisection of 1st metatarsal and proximal phalanx.
	Intermetatarsal Angle Ideal average measurement: 8-12° Line joining bisection of distal and proximal regular shafts of metatarsals one and two. The lesser intermetatarsal angles are not usually measured. Rectus >14 degrees Metatarsus adductus/forefoot adductus = 12 degrees
	Proximal Articular Set Angle (PASA) Ideal average measurement: 0-8° (1) Line joining edges of the proximal articular facet of the proximal phalanx (2) Bisection of proximal phalanx • Subtract 90° from angle.   Distal Articular Set Angle (DASA) Ideal average measurement: 0-6° (1) line joining edges of distal articular facet of 1st metatarsal. (2) Bisection of 1st metatarsal • Subtract 90° from angle. NB: The PASA and DASA should add up to equal the HAV angle
	Hallux Interphalangeal Angle Ideal average measurement: 8-10° Angle formed by the bisection of proximal and distal phalanx
	Tibial Sesamoid Position: determined by the position of the tibial sesamoid relative to the 1st metatarsal axis. The seven positions are identified.
	Metatarsal Break Angle Ideal average measurement: 142° (1) Line joining distal centre 1st and 2nd metatarsals (2) Line joining distal center 2nd and 5th metatarsals   Metatarsal Formula: 2>1=3>4>5

Content Approved by: Head of Podiatry

Page maintained by: Podiatry Webmaster

Last Updated: July 8th, 2003