Ribs - AP Upper (1-8)This is a featured page

Radiographic Positioning


Adult
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Name of projection Ribs - AP Upper (1-8)
(See "Special Notes" below).
Area Covered This view best shows the posterior ribs. It also shows the lung fields, mediastinal structures and diaphragm.
Pathology shown Pathologies of the ribs, particularly, fractures of the upper posterior ribs.
Radiographic Anatomy Ribs radiographic anatomy
IR Size & Orientation 35 x 43 cm
Landscape usually, but may be portrait depending on body habitus
D.R. may cover 43 x 43 cm
Film / Screen Combination Regular
(CR and DR as recommended by manufacturer)
Bucky / Grid Moving or Stationary Grid
Filter Decubitus filter for women with large breasts, particularly for non-digital imaging
Exposure 65 kVp
16 mAs
FFD / SID 100 cm
Central Ray Directed to the midsaggital plane at the level of T7
Perpendicular to the IR
Collimation Centre: T7, or the inferior border of the scapula
Shutter A: Open to approximately 5cm above the shoulder to include upper airway
Shutter B: Open to the level of the acromioclavicular joints (AC joints) laterally. This will include the lung fields and ribs laterally.
Markers Superior and Lateral
Marker orientation AP
Shielding Gonadal (check your department's policy guidelines)
Respiration On suspended deep inspiration
This ensures the diapragm is as low as possible, allowing as many upper ribs as possible to be seen
Positioning
  • If the patient's condition allows, perform the views with the patient erect, standing or seated, with their back touching the bucky
  • Centre the midsaggital plane of the patient to the midline of the IR
  • Ensure the midsaggital plane is perpendicular to the IR, that is, the patient is not rotated
  • Arms relaxed at the sides
  • If possible, pronate hands and bring elbows away from the sides of the body to help clear the scapulae of the lung fields
  • Adjust the height of the IR to 5cm above the shoulders
  • Raise the chin if this is superimposing over the chest


    • Critique

    		 Positioning

    • No rotation as evidenced by
      • the medial ends of the clavicles equidistant from the spine
      • the clavicles are in the same horizontal plane
    • The lungs fields are clear of the scapulae
    • The 1st though to 9th posterior ribs will be visualised above the diaphragm on full inspiration. Note that fewer than the first 9 ribs will be seen if the patient is experiencing much pain and so therefore is less likely to take a deep breath. Less than 9 ribs may also be seen when the patient is supine.
      Area Covered


      • Posterior ribs 1 through to 8, lungs fields, apices, costophrenic angles, heart
      Collimation


      • Centre: T7 Thoracic vertebra
      • Shutter A: Open to show the first rib superiorly and the diaphragm inferiorly
      • Shutter B: Open to show the lung fields and ribs laterally
      Exposure


      • There should be adequate exposure so that the ribs and thoracic vertebrae are seen faintly through the heart
      • There is minimal patient motion demonstrated by sharp, clear cortical margins and bony trabucular markings of the ribs being demonstrated.
      Special Notes PA vs AP Rib views
      There are several factors that will determine whether a PA or an AP rib view is indicated for the X-ray examination. The following information should be considered
      - the patient's clinical history
      - the mechanism of injury
      - the region of the rib cage which is painful
      The cortical margins and bony trabeculation of the ribs closest to the IR/bucky will be sharper and clearer. Therefore,
      Anterior ribs are best shown on a PA view
      &
      Posterior ribs are best shown on an AP view.



      AndyC
      AndyC       		Latest page update: made by AndyC , Jun 19 2011, 2:35 PM EDT (about this update About This Update AndyC Edited by AndyC

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