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The Best Alternatives to e-Anatomy for Radiology Trainees

e-Anatomy is the standard atlas of labelled radiological anatomy. If you want something more focused, more guided, or free, these are the best alternatives.

e-Anatomy, from IMAIOS, is the standard resource for labelled radiological anatomy online. It is a comprehensive atlas of the whole body across CT, MRI, radiographs, angiography, nuclear imaging and anatomical diagrams, with over 870,000 labels. Each structure comes with a detailed written description, so it works as both an image atlas and an anatomy reference.

But a reference and a teaching tool do different jobs. An atlas is organised around the anatomy itself, while trainees are usually organised around what they need to know on the next shift. With thousands of structures and detailed write-ups for each, it can be hard to tell which anatomy matters clinically, and an atlas works best when you already know what you are looking for.

If you want something more focused, more guided, or free, here are the best alternatives.

1

NavRad Anatomy

For clinically relevant anatomy with an AI tutor

Like e-Anatomy, NavRad Anatomy features real scans with labelled structures and colored overlays. But it focuses on the clinically relevant anatomy a radiologist actually uses, with concise notes, brief clinical pearls, and an AI Guide that teaches interactively instead of leaving you to browse.

Labels and colored overlays: Real scans with labelled structures. Colored overlays and masks show exactly where each structure sits and how far it extends.
Clinically relevant by design: Instead of exhaustive paragraphs for every structure, each one has concise notes and brief clinical pearls. It is what a radiologist practically needs to recognise, report and remember.
An AI Guide that teaches: There is a lot of anatomy to learn, so the AI Guide makes it interactive. Ask it to find a structure, quiz you, or take you through a topic. Try "teach me the liver segments", "teach me the segments of the carotid artery", or just "teach me the basics", and it walks you through the anatomy like a good tutor.
Coverage: NavRad Anatomy is new and the library is growing, but it already covers most of the body on CT: chest, abdomen and pelvis, head, cardiac CT, and CTA of the head and neck. More coming soon.
2

CaseStacks Anatomy Modules

For free, foundational anatomy modules

CaseStacks offers a set of free anatomy modules with labelled radiographs and scrollable CT and MRI series, pitched at the level of medical students and junior residents.

Free and organised by region: Free modules cover the brain, chest, cardiac CT, abdominal CT, pelvic MRI, shoulder MRI and knee MRI, plus advanced modules on the cranial nerves and the temporal bone.
The Trade-off: CaseStacks describes the detail as appropriate for medical students and junior residents, and most modules cover basic anatomy. It is a good first pass, not an exhaustive reference, and the library is much smaller than e-Anatomy's.
3

Imaging Anatomy

For a free, PACS-style landmark atlas

Imaging Anatomy is a free, open-access interactive atlas whose interface mimics a PACS workstation. You scroll through plain film, CT, MRI and ultrasound studies and switch anatomical landmarks on and off to identify structures.

PACS-like tools: Pan, zoom, adjust brightness and contrast, take caliper and angle measurements, use cross-reference lines, and test yourself with a "name the landmark" quiz mode, all in the browser.
The Trade-off: Labels identify structures, and the explanatory layer largely links out to Wikipedia rather than offering concise clinical teaching points. The update log on its homepage also ends in 2024, so check that the modules you need are current.
4

Atlas of Radiology

For free, expert-labelled CT and MRI atlases

Atlas of Radiology, developed by Expert Radiotech, offers interactive CT and MRI radiological anatomy atlases with expert manual labelling, alongside a browser-based DICOM viewer.

Free and hands-on: Both the CT and MRI anatomy atlases are free, with manual expert labelling across key body regions, and a built-in web DICOM viewer lets you open and scroll CT and MRI studies without installing software.
The Trade-off: It is built as a labelled atlas for study and daily reference. The landing page does not itemise coverage region by region or offer a guided curriculum, so confirm that the regions you need are covered before relying on it.
5

K-Anatomy (OMCSA)

For broad sectional MRI and CT coverage

Online MRI and CT Sectional Anatomy, known as K-Anatomy, is an interactive sectional atlas created by Hong Kong radiologist Dr. Kenneth Ho. You click an anatomical region and scroll through its sectional images.

Wide regional coverage: The atlas spans the brain, temporal bone, orbit, paranasal sinuses, cranial nerves, neck, brachial plexus, spine, thorax, coronary arteries, abdomen, pelvis and the joints of the upper and lower limbs. At least some modules are free; the brain atlas, for example, is listed as free with 427 images.
The Trade-off: It is a lookup atlas rather than a teaching tool. The site does not advertise concise clinical notes or guided learning, so it works best when you already know which structure you are after.
6

Complete Anatomy

For 3D gross anatomy with radiology correlation

Complete Anatomy, from 3D4Medical, is built around interactive 3D models of the human body. Its radiology section lets you browse MRI, CT, angiography, radiograph and mammogram images and correlate their structures with the 3D model.

Seeing anatomy in 3D: You can select a pin on a scan, a name in the structure list, or a structure on the 3D model, and see the same structure in each view. That is a useful way to build spatial understanding before reading cross-sections.
The Trade-off: It is a general anatomy platform first. The radiology images are there to support the 3D model rather than to serve as a complete cross-sectional atlas, so it complements a dedicated imaging resource rather than replacing one.

Learn the Anatomy That Matters

Labelled scans, colored overlays, concise clinical pearls and an AI Guide that teaches you as you go.

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