Hip Axial Projection

AXIAL PROJECTION

Projection providing a longitudinal axis view of pelvic structures

CRANIOCAUDAL AXIS

Hip Axial Projection - Anatomical View

Hip Axial Positioning - Technical View

Exposure Factors

75-80

Kilovoltage (kV)

Milliamperage (mAs)

Large Focus

Focus Type

105-115 cm

Focus-Plate Distance

Equipment: With bucky. Position: Supine.

Plate Size

35 × 43 cm

Transversely

Visible Anatomical Structures

Bony Pelvis

Complete

Both Hips

Coxofemoral joints

Proximal Femurs

Both femurs

Iliac Crests

Superior and inferior

Femoral Head

Femur head

Acetabular rim - Complete acetabular border
Pubic rami - Superior and inferior pubis
Sacroiliac joint - Both joints in axial view
Public symphysis - Anterior pubic union
Obturator foramen - Bilateral obturator foramen
Iliac spines - Posterosuperior, posteroinferior, anterosuperior
Coccyx - Lower end of spine
Greater trochanters - Femoral projections
Acetabulum - Cotyloid cavity in axial view

Patient Positioning

Patient in supine position on table

Both legs fully extended

Hands on chest or arms at sides with hands pronated

Patient's midsagittal plane aligned with table midline

Internal rotation of both lower limbs

Feet touching each other (neutral position)

Place support under knees (rarely done in practice)

Cassette centered on pelvic center, slightly above greater trochanters

Ensure perfect bilateral symmetry

Central Ray Direction

Vertical and perpendicular to cassette center

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PERPENDICULAR

Entry point: Midline at iliac crest level

Exit point: Pelvic center

Centering: Cassette center at pelvic center

Trajectory: Craniocaudal axis through axial plane

Angulation 0° - Direct vertical axial

Patient Instructions

"Do not breathe during exposure"

Maintain complete immobility - Do not move legs during exposure

Technical Considerations

Internal Rotation

Internal rotation to visualize femoral neck without overlap.

Axial Symmetry

Bilateral symmetry essential for comparative axial evaluation.

Axial View

Provides longitudinal axis view of pelvic structures.

Clinical Indications

Pelvic fractures

Axial evaluation

Hip osteoarthritis

Bilateral study

Pelvic trauma

Axial Projection Advantages

Longitudinal View

Allows craniocaudal axis evaluation of structures

Bilateral Comparison

Ideal for comparing both coxofemoral joints

Anatomical Relations

Shows spatial relationships in axial plane

HIP AXIAL PROJECTION