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    ADVERTISEMENT: Radiopaedia is free thanks to our supporters and advertisers. Become a Gold Supporter and see no third-party ads. Dixon A, Normal chest x-ray with Mach effect. Case study, Radiopaedia.org (Accessed on 16 Aug 2023) https://doi.org/10.53347/rID-48424 At the time the case was submitted for publication Andrew Dixon had no recorded disclosures. You can use Radiopaedia cases in a variety of ways to help you learn and teach. Creating your own cases is easy. Unable to process the form. Check for

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    • Check out this CXR: the heart looks like its "outlined" Is this air? Pneumopericardium? Pneumomediastinum? No! This is the Mach effect: our 🧠 enhances the edge contrast, falsely making it look like there is an area of lucency. A visual illusion! https://t.co/gN5IjZ26kf https://t.co/0m4ZUw00bx