FOOT

Question 1

PP: Supine; knee flexed; plantar surface against IR

RP: 3rd MTP base

CR: ┴ or 10o posteriorly

SS: MT & Tarsal (┴); TMT joint (10o)

ER:

-For localizing foreign bodies

-Location of fragments in fx of metatarsals & anterior tarsals

-General surveys of the foot

10 DEGREES Angulation: reduces foreshortening of metatarsals

Answer 1

AP/AP AXIAL PROJECTION

Question 2

PP: Supine; knee flexed; leg rotated medially; plantar surface of foot 30o to IR

RP: 3rd MTP base

CR: ┴

SS:

Cuboid

Interspaces on lateral side of foot

Sinus tarsi

Lateral cuneiform

3rd-5th MT bases

5th MT tuberosity

Answer 2

AP OBLIQUE PROJECTION

Medial Rotation

Question 3

P: Dorsiflex foot (┴ to lower leg); leg & foot in lateral position; lateral side of foot against IR (more comfortable)

RP: 3rd MT base

CR: Perpendicular

SS: Entire foot in profile

ER:

For localizing foreign body

Degree of anterior & posterior displacement of fx

Answer 3

LATERAL PROJECTION

Mediolateral

Question 4

PP: LPO/RPO; medial surface against IR; plantar surface of foot ┴ to IR

RP: 3rd MTP base

CR: Perpendicular

SS: True lateral projection of foot

Answer 4

Lateromedial

Question 5

PP: Prone; foot elevated; dorsal surface against IR; heel rotated medially 30o (to demonstrate 1st and 2nd MT); heel rotated laterally 20o (to demonstrate interspaces b/n 2nd-3rd, 3rd-4th & 4th-5th MT)

RP: 3rd MTP base

CR: Perpendicular

SS: PA oblique projection of the bones of the foot & interspaces at the proximal ends of metatarsal

Answer 5

GRASHEY METHOD

PA OBLIQUE PROJECTION

Medial and Lateral Rotation

Question 6

PP: Upright; feet elevated (use blocks); IR b/n feet; weight equally distributed on each foot

RP: Point above 3rd MTP base

CR: Horizontal

SS: Status of longitudinal arch (pes planus); Bohler’s critical angle (b/n 20-40o); calcaneal fracture (less than 20o)

Bohler’s Critical Angle: angle b/n superior apex of mid-calcaneus to anterior process of calcaneus

Answer 6

WEIGHT-BEARING METHOD

LATERAL PROJECTION

Question 7

PP: Upright; 2 exposures

First Exposure: opposite foot step backward (for forefoot); tube in front

Second Exposure: opposite foot step backward (for hindfoot); tube behind

RP: 3rd MTP base (1st exposure); level of lateral malleolus (2nd exposure)

CR: 15o posteriorly (1st exposure); 25o anteriorly (2nd exposure)

SS: Full outline of the foot

Answer 7

WEIGHT-BEARING COMPOSITE METHOD

AP AXIAL PROJECTION