ARDMS Practice Test 2025 – Complete Exam Prep Guide

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Question: 1 / 400

Which type of artifact appears echogenic and stems from gas bubbles as they vibrate due to the interaction with the ultrasound beam?

Edge shadow

Crosstalk

Slice thickness

Ring-down artifact

The type of artifact described in the question, which appears echogenic and is caused by gas bubbles vibrating in response to the ultrasound beam, is known as a "ring-down artifact." This artifact occurs when gas bubbles within a structure, such as the gastrointestinal tract or within a cyst, vibrate and produce a distinct echogenic pattern on the ultrasound image.

The other options can be explained as follows:

- Edge shadow artifact occurs when there is shadowing or darkening behind a sharply demarcated object.

- Crosstalk is an artifact that occurs when there is interference or bleed-through from one ultrasound plane to the next.

- Slice thickness artifact is caused by inadequate orientation of the ultrasound beam, leading to poor resolution and an artificial appearance of structures.

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