Did you know?
Bone looks white on an X-ray because dense bone absorbs much of the radiation, while air absorbs little and looks black.
Source: RadiologyInfo.org (RSNA & ACR) (opens in a new tab)
How medical imaging works
Science
The science behind the scan — and the sequence
Short, cited explainers on medical imaging and genomics. Every claim links to a source we actually read. Educational content, not medical advice.
- Sources checked October 2026
Educational content, not medical advice. It explains general science and does not replace a conversation with a qualified clinician about your own health, tests or treatment.
Did you know?
On the CT scale, water is defined as 0 Hounsfield units and air as −1000. Readers “window” this range to see different tissues.
Source: AMIA Annual Symposium Proceedings (opens in a new tab)
Reading a medical imageDid you know?
Human DNA has about 3 billion bases, and more than 99 percent of them are the same in all people.
Source: MedlinePlus Genetics (U.S. National Library of Medicine) (opens in a new tab)
DNA and the genomeImaging
Imaging explainers
Genomics
Genomics explainers
Looking for a definition?
HU, DICOM, SNP, VUS, coverage and more — each term links back to the sources we used.
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