X RAY TOES AXIAL HALLUX VIEW

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X RAY TOES AXIAL ( HALLUX ) VIEW

• The vertical ray is centred over the first metatarso-phalangeal joint.

First metatarsal-phalangeal sesamoid bones

The sesamoid bones are demonstrated on the lateral foot projec- tion. However, when requested specifically, a modified lateral and an axial projection may be necessary for further demonstration.

POSITION OF PATIENT AND CASSETTE

The patient sits on the X-ray table, with legs extended. The hallux is then dorsiflexed with the aid of a bandage and held by the patient. The cassette is raised on a support and positioned firmly against the instep.

DIRECTION AND CENTRING OF THE X-RAYS BEAM

• Centre to the sesamoid bones with the central ray projected tangentially to the first metatarso-phalangeal joint.

Exposure Satting

MA station -100

FFD - 80 to 100 cm

Kvp - 45 -50

mAS - 4 to 6 mAs

Grid - Yes Horizontal

Cassette Size - 10"x12" or 8"x10