Cervical - AP Vertibral ArchThis is a featured page

Radiographic Positioning


Adult
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Name of projection Cervical - AP Vertibral Arch
Area Covered Cervical vertebra from C4 to C7. Posterior elements of mid and distal cervical and proximal thoracic vertebrae
Pathology shownPathology of posterior vertebral arch aspects of C4 to C7 or spinous processes of cervicothoracic vertebra
Radiographic AnatomyCervical Spine Radiographic Anatomy
IR Size & Orientation 18 x 24 cm
Portrait
Film / Screen Combination Regular
(CR and DR as recommended by manufacturer)
Bucky / Grid Moving or Stationary Grid
FilterNo
Exposure 65 kVp
16 mAs
FFD / SID 100 cm
Central Ray CR angled 20° to 30° caudal
CR directed to enter at lower margin of thyroid cartilage
Collimation Centre: lower margin of thyroid cartilage, collimate to the 18 x 24cm film size
Shutter A: Open so that the light of the collimated field just includes the top of the ear.
Shutter B: Open to include the soft tissue of the neck laterally
Markers Lateral
Marker orientation AP
Shielding Gonadal (check your department's policy guidelines)
RespirationSuspended
PositioningIn general,
  • Ensure the removal of artefacts that may superimpose the anatomy of interest
  • Only request the patient move into position if the possibility of spinal injury has been ruled out
  • Take care to ensure no rotation of either the head, neck or torso.
Patient is supine with arms at side,
  • Position the IR patient so that it is either in the table bucky, or is on the barouche posterior to the cervical spine
  • Position the midsagittal plane so that it is perpendicular to the IR
  • Hyperextend the neck (if patient is able)
  • CR angled 20° to 30° caudal
  • CR directed to enter at lower margin of thyroid cartilage
Critique

Positioning
Area Covered
Collimation
Exposure
Special Notes



AndyC
AndyC 		Latest page update: made by AndyC , Jun 5 2011, 4:19 AM EDT (about this update About This Update AndyC Edited by AndyC

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