Lecture (6)

• Fingers

PA Fingers

Exposure Factors

Kv mAsFFD (cm)

Grid Focus Cassette

50 4 100 No Fine 18 x 24 cm

Patient position

Seated at end of radiographic tableApply lead shielding for Radiation safety Part positionForearm resting on table topPalmar surface against cassette Separate fingers slightly Center Finger of interest to cassette center

• Central Ray

Perpendicular• Center Point

To proximal metacarpophalangeal joint

• Structures shown

Distal, Middle, and proximal phalanges

• Lateral FingersExposure Factors

Kv mAs FFD (cm) Grid Focus Cassette

50 4 100 No Fine 18 x 24 cmPatient positionSeated at end of radiographic tableApply lead shielding for Radiation safetyPart positionForearm resting on table topRest ulnar surface on tableHand in true lateral positionExtend and Center Finger of interest to Cassette center

• Central Ray

Perpendicular

• Center Point To proximal metacarpophalangeal joint

• Structures shown

Distal, Middle ,and proximal phalanges in lateral view

• Thumb

Baic Projections AP PA oblique Lateral

AP Thumb

Exposure Factors

Kv mAs FFD (cm) Grid Focus Cassette

50 4 100 No Fine18 x 24

cm

Patient positionSeated at end of radiographic tableApply lead shielding for Radiation safety

• Part position• Forearm resting on table top• Align thumb to long axis of cassette • Internally rotate hand with fingers extended

Until posterior surface of thumb is in contact with film

• May need to hold fingers back with other hand Central Ray

PerpendicularCenter Point First metacarpophalangeal joint

Structures shownDistal and proximal phalanges, first metacarpal, trapezium and associated joints

• PA Oblique Thumb

Exposure Factors

Kv mAs FFD (cm) Grid Focus Cassette

50 4 100 No Fine18 x 24

cm

Patient positionSeated at end of radiographic tableApply lead shielding for Radiation safetyElbow flexed 90 degrees with hand resting on cassettePart positionAbduct thumb slightly with palmar surface of hand In contact with cassette (This will place thumb int 45 degrees oblique position Align thumb to long axis of cassette

• Central Ray

Perpendicular

• Center Point

First metacarpophalangeal joint• Structures shown

Distal and proximal phalanges, first metacarpal, trapezium and associated joints in a45degrees oblique position

• Lateral Thumb

Patient positionSeated at end of radiographic tableApply lead shielding for Radiation safetyElbow flexed 90 degrees with hand resting on cassettePart positionStart with hand pronated and thumb abducted, with Fingers and hand slightly arched then rotate hand Medially slightly until thumb is in a true lateralAlign long axis of thumb to long axis of cassette

Central Ray Perpendicular

Center Point First metacarpophalangeal joint

Structures shownDistal and proximal phalanges, first metacarpal, trapezium and associated joints in alateral position

• Wrist Joint

Basic Projections

o PAoOBLIQESoLATERALoCARPAL TUNNEL

PA WRIST JOINTExposure Factors

Kv mAs FFD (cm) Grid Focus Cassette

60 4 100 No Fine 18 x 24 cm