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Diagnostic ultrasound ( PDFDrive )

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APPENDIX

Ultrasound Artifacts: A Virtual Chapter

FIG. A.25 Refraction. This igure shows what appears to be a second gestational sac due to refraction artifact. This is sometimes called

“ghosting.” 2 (See Chapter 1, Fig. 1.8.)

FIG. A.26 Refraction. A panoramic view of the Achilles tendon demonstrates a rupture within the midportion of the tendon. The proximal

aspect of the tendon is chronically thickened and hypoechoic (arrows). Refraction artifact (arrowheads) is caused by the interfaces between the

ruptured tendon edges and hemorrhage. C, Calcaneus. 13 (See Chapter 23, Fig. 23.11.)

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