Lumbar - Oblique
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Radiographic Positioning
Adult | Other related pages of interest |
Name of projection | Lumbar Spine - Oblique |
Area Covered | L5 - S1 , zygapophyseal joints (RPO and LPO show downside, RAO and LAO show upside), "scotty dogs" visualised, both right and left obliques are performed |
Pathology shown | Defects of the pars interaerticularis, spondylolysis |
Radiographic Anatomy | Lumbar Spine Radiographic Anatomy |
IR Size & Orientation | 35 x 43cm |
Film / Screen Combination | Regular (CR and DR as recommended by manufacturer) |
Bucky / Grid | Moving or Stationary Grid |
Filter | No |
Exposure | 75kVp 40 mAs |
FFD / SID | 100 cm |
Central Ray | CR perpendicular to IR Centre to lower costal margin (L3) 4cm above iliac crest |
Collimation | Four sides of collimation collimate to area of interest |
Markers | RPO and LPO - marker orientation AP RAO and LAO - marker orientation PA RPO and LPO shows downside, RAO and LAO shows upside zygapophyseal joints |
Shielding | Gonadal (check your department's policy guidelines) |
Respiration | Suspend respiration on expiration |
Positioning |
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Critique | Positioning |
Special Notes |