Lecture (12)

Radiography of the Lower Limbs• Foot

Basic Projections

Dorsi-PlantarLateralOblique

Dorsi-Plantar Foot

Exposure Factors

Kv mAs FFD (cm) Grid Focus Cassette

55 5 100 No Fine 24 x 30 cm

• position Patient • Supine or seated on table• Knees flexed with feet separated• Part position

Rest plantar surface of foot firmly On cassette• Adjust midline of foot parallel tolong axis of cassette

Central Ray

Angled 10 -15 degrees towards heel

Center Point Base of 3rd metatarsal

• Structure shown

Tarsals, metatarsals and phalanges

• Lateral Foot

Exposure Factors

Kv mAs FFD (cm) Grid Focus Cassette

60 10 100 No Fine 24 x 30 cm

Patient Position lying upon affected sideAdjust leg & foot in lateral position

Part positionAdjust patella perpendicular to table Adjust plantar surface perpendicular to cassette

Central RayPerpendicular

Center Point Medial cuneiform (at level of base of 3rd metatarsal)

• Structure shown

Lateral view of Tarsals, metatarsals and phalanges

• Oblique foot

Exposure Factors

Kv mAs FFD (cm) Grid Focus Cassette

60 5 100 No Fine 24 x 30 cm

Patient position Supine or seated on tableKnees flexed with feet separatedPart positionCenter toes with plantar surface flat Against cassetteMedially rotate until plantar surface form angle of 30 degrees to cassette

• Central ray

Perpendicular

• Center Point

3rd metatarsal

• Structure shown

Tarsals, metatarsals & phalanges Oblique view of