Cord signal changes are often encountered in the clinical setting of myelopathy, a neurologic deficit related to the spinal cord pathology (1). The most common causes of myelopathy include disc…
FIG. 15.1 A: AP oblique right vertebral arteriogram in the late arterial phase demonstrates the anterior spinal artery (ASA) (small arrow) descending from the proximal basilar artery. Note the ASA…
FIG. 12.1 Lateral radiograph of lumbar spine in extension (A), neutral, (B), and flexion (C) positions. Note the anterolisthesis of L4 over L5. The addition of radiographs with the spine…
FIG. 20.1 Normal axial CT anatomy. A: Axial image through the mesotympanum shows the following: 1, internal auditory canal; 2, cochlear aperture; 3, vestibule; 4, vestibular aqueduct; 5, posterior semicircular…
Ellen G. Hoeffner, MD, and Laurie A. Loevner, MD LEARNING OBJECTIVES 1. Review the imaging findings of common acute infectious and inflammatory conditions of the neck and learn the fundamentals of…
FIG. 22.1 Bones constituting the skull base. Graphical representation of bones of the skull base includes the unpaired midline bones, ethmoid, sphenoid, and occipital (red, teal, and blue, respectively), and…
FIG. 23.1 Normal anatomy of the parotid glands. T1-weighted (A) and T2-weighted (B) MR and contrast-enhanced CT (C) images of the upper neck at the level of the parotid glands.A:…
Acknowledgment: Darryl H. Hwang, PhD. Masses that are extradural in location may surround, compress, or displace the thecal sac (see Table 13.1). These lesions may show a “cutoff sign” of…
Dushyant Purohit, MD, FRCPath, David M. Carpenter, PhD, and Thomas P. Naidich, MD LEARNING OBJECTIVES 1. Appreciate the gyral and sulcal anatomy of the brain surface. 2. Appreciate the gross structure of…
Another aspect of the evaluation of brain masses is to determine whether a lesion is solitary or multiple. Brain metastases can be multiple or single, and sometimes, differentiation of a…
