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Citation, DOI & article dataCitation: Ngo, V., Murphy, A. Ribs (AP oblique view). Reference article, Radiopaedia.org. (accessed on 08 Sep 2022) https://doi.org/10.53347/rID-52170 The AP oblique rib projection is performed to best demonstrate the axillary ribs. Oblique ribs may be conducted either as an anterior oblique or posterior oblique view. On this page:The AP oblique view specifically focuses on the axillary ribs. The rib series is often considered to be an unnecessary, unjustified projection in many radiology departments. Indeed the Royal College of Radiologists (UK) iRefer guidelines state "Demonstration of a simple rib fracture does not usually alter management but if a complication such as pneumothorax or infection is suspected, chest radiograph would be appropriate" 3. Thus if the projection might change the patient management it may still be considered pertinent and worthy of discussion.
If adequate obliquity has been achieved, the glenohumeral joint on the affected side will be open. If you are confused by which way to oblique the patient depending on AP/PA position, remember that the spinous processes will always point towards the unaffected side (i.e. for left oblique ribs, spinous processes point to the right) (see Case 1). Conducting AP rib oblique views produces less magnification of the ribs, and provides more bony detail than that of the PA view 1. When a patient is unable to stand for an erect projection, have the patient supine and supported by immobilization devices to adjust the patient into an oblique position. For the PA oblique projection (LAO/RAO), the affected side is rotated 45 degrees away from the IR, with the CR as per the AP oblique view. ReferencesRelated articles: Imaging in practicePromoted articles (advertising)Which ribs are demonstrated on an AP oblique projection?The AP oblique rib projection is performed to best demonstrate the axillary ribs.
How much is the patient rotated for a PA oblique projection of the sternum?On average, rotation of 15-20 degrees is required. The patient's body should be aligned to center the long axis of the sternum on the midline of the grid.
How far is the top of the 14 17 inch 35 43 cm IR or exposure field placed above the upper border of the shoulder for projections of the ribs?Cards
Which two projections of a rib series would best demonstrate right posterior ribs?Cards
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