By Laura W. Bancroft MD, Mellena D. Bridges MD
MRI general editions and Pitfalls offers over 1,800 pictures of standard anatomic versions, artifacts, and different gains that mimic pathology on MRI scans. The ebook will lessen the speed of diagnostic blunders via assisting radiologists distinguish pathology from MRI appearances that could simulate disease.
Organized by way of anatomic zone, the publication covers the gamut of neuroradiology, breast imaging, vascular, cross-sectional, and musculoskeletal radiology. every one bankruptcy indicates examples of standard anatomy, adaptations, universal incidental or benign stipulations, and imaging positive factors that can mimic different illness strategies. Concise determine legends facilitate fast id of imaging features. Examples of universal MRI artifacts are incorporated, with short motives from physicists in language comprehensible to radiologists.
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Additional info for MRI Normal Variants and Pitfalls
Example text
Axial T1-weighted enhanced image through the mid-calvarium demonstrates increased anterior to posterior diameter of the skull, due to premature fusion of the sagittal suture. Compare with Figure 1-85. FIGURE 1-85 Metal artifact from bobby pin. Spin dephasing and distortion (arrow) is observed due to differences in magnetic susceptibility of a metal hairpin compared to that of tissue and air. 47 Section I ■ HEAD AND NECK FIGURE 1-86 Distortion. The arrow points to an area of signal dephasing and distortion from an unknown source.
21 Section I ■ HEAD AND NECK Cisterns A B FIGURE 1-33 Cystic foci in the hippocampal sulcal remnants. A: Coronal and (B) axial FSE T2-weighted fat-suppressed images through the temporal lobes delineate small cystic foci (arrows) in the hippocampal sulcal remnants, normal developmental variants. FIGURE 1-34 Prominent cerebrospinal fluid posterolateral to the anterior clinoid process. Axial FSE T2-weighted fatsuppressed image demonstrates a prominent focus of cerebrospinal fluid (CSF) posterior to the clinoid, representing asymmetry that is within normal limits.
A B FIGURE 1-58 Fenestrated right posterior cerebral artery (PCA). A and B: Maximum intensity projections (MIPs) of the circle of Willis demonstrate focal fenestration of the right PCA (arrow). 32 Chapter 1 FIGURE 1-59 Fetal circulation of the right posterior cerebral artery (PCA). Maximum intensity projection (MIP) of the circle of Willis demonstrates normal variant blood supply of the right PCA (arrow) from the internal carotid artery (arrowhead). ■ THE HEAD FIGURE 1-60 Bilateral fetal-type circulation.