# Beat the heat – Which artifact can you find in this ultrasound loop? - Answer

## Metadata
- Content type: Blog
- Canonical URL: https://123sonography.com/blog/ultrasound-summer-challenge-which-artifact-can-you-find-ultrasound-loop-answer
- Published: June 18, 2024
- Last updated: August 14, 2025

## Overview
Here is the answer to our Ultrasound Summer Challenge!

## Snapshot
- Category: Case

## Authors
- [Prof. Thomas Binder, MD, FESC](/speaker/30) - Cardiologist, Head of Digital Learning; Medical University of Vienna

## Tags
- Echo

## Related Courses
- [Echo BachelorClass](/course/echobachelorclass)
- [Carotid Ultrasound MasterClass](/course/carotid-ultrasound-masterclass)

## Content

## The correct answer is:

**A) Acoustic shadowing**

In this image, you can find a calcified plaque in the common carotid artery, which leads to a shadow distal of the plaque. Due to this artifact (artifact), you can not image structures behind the calcified plaque, such as the posterior wall of the vessel. In addition, it is challenging to obtain Doppler information in such regions. As a result, you might miss or underestimate a carotid lesion.

[![](https://123sonography.com/sites/default/files/styles/video_thumbnail/public/video/images/carotis_mystery_1.png?itok=rSPcA3Hs)](https://vimeo.com/481347688?loop=1&title=0&byline=0&portrait=0)

Don't start sweating when you have to make this diagnosis! Get your course now and beat the heat with us:

[![Offer banner.](https://123sonography.com/sites/default/files/inline-images/summer-offer-2024-beat-the-heat-banner-blog_0.jpeg)](https://join.123sonography.com/summer-offer-echo)[Only available until June 23rd, so be quick!](https://join.123sonography.com/summer-offer-echo)

Yours,
Thomas Binder and the 123sonography team