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Cervical spine: comparison of 45 degrees and 55 degrees anteroposterior oblique radiographic projectionsS Marcelis et al. Radiology. 1993 Jul. AbstractThe orientation of the intervertebral foramina (IVF) at six cervical levels on transaxial images in 65 magnetic resonance (MR) studies was determined to explain variations in size and shape evident on the 45 degrees standard radiographic oblique view. Analysis of MR imaging data showed that substantial variations in the orientation of the cervical IVFs occurred throughout the cervical spine and that a 55 degrees anteroposterior (AP) oblique view with standard radiography probably would lead to better visualization of the lower cervical IVFs. These results were confirmed with a radiographic and anatomic study of two cadaveric specimens. In a prospective clinical study of 23 patients, 45 degrees and 55 degrees AP oblique views were compared by measuring the maximal transverse diameter of all the cervical IVFs. IVF size was substantially increased on the 55 degrees AP oblique projection at all lower cervical levels. The 55 degrees AP oblique view of the cervical spine is optimal for evaluating the lower cervical foramina and can be a routine alternative to the 45 degrees oblique view in the analysis of all cervical foramina. Similar articles
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When an AP projection of the cervical spine is performed the central ray is directed?When an anteroposterior (AP) projection of the cervical spine is performed, the central ray is directed: 15 degrees cephalad.
When performing an AP axial projection of the cervical spine in order for the central ray to pass through C4 What is the appropriate entrance point for the beam?When performing an AP axial projection of the cervical spine, the central ray should be angled 15-20 degrees cephalad. Because the central ray should pass through C4, and because there is a cephalic angulation of the beam, the central ray should enter inferior to the level where it exits.
Which of the following is are well demonstrated in the oblique position of the cervical vertebrae quizlet?Which of the following is (are) well demonstrated in the oblique position of the cervical vertebrae? 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.
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Which of the following is are demonstrated in the AP projection of the cervical spine?
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