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Citation, DOI & article dataCitation: Nguyen, M., Murphy, A. Cervical spine (AP oblique view). Reference article, Radiopaedia.org. (accessed on 08 Sep 2022) https://doi.org/10.53347/rID-51497 The AP oblique cervical spine projections are supplementary views to the standard AP, odontoid and lateral images in the cervical spine series and are always done bilaterally for comparison purposes. However, the PA oblique projection is preferred as it reduces radiation dose to the thyroid 1 compared to the AP oblique projection. On this page:This projection can be used to visualize pathology involving the adjacent soft tissue structures or cervical spine, especially stenosis of the intervertebral foramina. Note: Such views should not be performed on trauma patients without the strict instructions of a qualified clinician who has reviewed the lateral cervical spine image or CT of the cervical spine. Moving the patient's head or neck, or removing a cervical collar could be detrimental.
To demonstrate the intervertebral foramen of the c-spine open, it is necessary to achieve adequate rotation of the vertebral column, usually at 45°. If underrotated, the foramina will be narrowed and a sternoclavicular joint would be superimposed over the vertebral column 3. Over rotation of more than 45° would cause one pedicle to be foreshortened while the other pedicle aligns to the midline of the vertebral bodies 2. ReferencesRelated articles: Imaging in practicePromoted articles (advertising)How is the patient positioned to demonstrate the left intervertebral foramina of the cervical vertebrae?How is the patient positioned to demonstrate the left intervertebral foramina of the cervical vertebrae? The left intervertebral foramina may be demonstrated by a 45-degree LAO or RPO position.
Which of the following positions will best demonstrate the cervical intervertebral foramina?The correct answer is (A). The cervical intervertebral foramina form a 45-degree angle with the MSP and, therefore, are well visualized in a 45-degree oblique position.
Which cervical oblique will show the left intervertebral foramen IVF )?The rules by which foramina are demonstrated are: posterior obliques demonstrate the contralateral foramina, i.e., RPO demonstrates the left foramina; the anterior obliques demonstrate the homolateral structures, and RAO shows the right foramina.
At what angles are the intervertebral foramina of the cervical vertebrae?The cervical foramen forms an angle of about 45 degrees with the anteroposterior axis of the spine and about 10-15 degree caudal inclination from horizontal. The cervical intervertebral foramen is located under the isthmus region and the cervical foramen was divided into three zones: medial, middle, and lateral.
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