Chest - Oblique
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Radiographic Positioning
Adult | Other related pages of interest |
Name of projection | Chest - Anterior Oblique (preferred over Posterior Obliques) |
Area Covered | Lung fields, apices, costophrenic angles, cardiac shadow and mediastinal structures, trachea |
Pathology shown | Pathologies involving the lung fields, abnormal cardiac shadows and mediastinal structures |
Radiographic Anatomy | Chest Radiographic Anatomy |
IR Size & Orientation | 35 x 43 cm Portrait 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 | No |
Exposure | 100 kVp 5 mAs |
FFD / SID | 180 cm |
Central Ray | Directed to the level of T7 (for Anterior Obliques) Directed 10 cm inferior to the jugular notch (for Posterior Obliques) Perpendicular to the IR |
Collimation | Centre: T7 (the level of the inferior border of the scapula) Shutter A: Open to approximately 5 cm above the shoulder to include the upper airway Shutter B: Open to include soft tissue borders laterally |
Markers | Superior and Lateral Marker orientation for Anterior Obliques - PA, for Posterior Obliques - AP |
Shielding | Gonadal (check your department's policy guidelines) |
Respiration | On suspended deep inspiration |
Positioning | Anterior Oblique
Posterior Oblique
|
Critique | Positioning
|
Special Notes | Anterior Obliques Keep in mind that the side shown is the side further from the IR, that is, Right Anterior Oblique (RAO) shows the left lung field Left Anterior Oblique (LAO) shows the right lung field Posterior Obliques Keep in mind that the side shown is the side closer to the IR, that is, Right Posterior Obliques (RPO) shows the right lung field Left Posterior Obliques (LPO) shows the left lung field Anterior Obliques vs Posterior Obliques Posterior Obliques - |