Transverse ultrasound scan of needle with echoes beneath

Transverse ultrasound scan of a needle, showing only a point (arrowhead) with numerous echoes beneath.

Reproduced with permission from: Introductory Guide to Musculoskeletal Ultrasound for the Rheumatologist, Second Edition. ISBN 978-90-313-9206-3; Bohn Stafleu van Loghum, Houten 2012. Copyright © 2012.

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