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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)What degree of obliquity and body rotation are required to best demonstrate the left sternoclavicular joints?the patient is preferably laid prone with a 10 to 15-degree anterior oblique rotation this is normally achieved with a wedge sponge helping the patient maintain position.
What portion of the ribs is demonstrated on an anterior oblique radiograph of the ribs below the diaphragm?The AP oblique rib projection is performed to best demonstrate the axillary ribs.
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