Ankle and foot CT scans carry far more bony detail than a radiograph, which is why they get ordered for pilon and malleolar fracture planning, talar dome lesions, and calcaneal fractures. Drop your DICOM files below and step through the axial, sagittal, and coronal series right in your browser — nothing is uploaded, and nothing is installed.
Upload Your CT ScanDrop the ankle or foot CT DICOM files or a ZIP archive straight from the imaging center. The parser sorts the thin axial stack from any sagittal or coronal reformats already included in the study.
Scroll the sub-millimetre axial slices, swap to a bone or soft tissue window, and pan into the subtalar joint, talar dome, or midfoot to inspect a fracture line or a coalition.
Four AI models independently review the ankle or foot CT for fracture pattern, articular step-off, and hardware position. Claude synthesizes the findings into one readable report.
A surgeon reaches for CT rather than MRI whenever the question is about bone shape and fragment position rather than soft tissue signal. Pilon and malleolar fracture planning depends on seeing exactly how the articular surface has split, how many fragments there are, and how they are displaced — detail a plain film cannot deliver and MRI does not resolve as sharply. Talar dome osteochondral lesions get a CT to size the bony bed underneath the cartilage defect, since the subchondral floor and any cystic change guide whether the lesion is fixed, drilled, or grafted.
Calcaneal fractures are graded with the Sanders classification, which is built directly from coronal CT slices through the posterior facet — the number of articular fragments on that view decides the surgical approach. Lisfranc and other midfoot injuries often hinge on a millimetre or two of diastasis between the bases of the metatarsals, a gap that is easy to miss on radiographs but shows clearly on thin CT sections. Tarsal coalition — an abnormal bony or fibrous bridge between two tarsal bones, most often calcaneonavicular or talocalcaneal — is confirmed on CT because the bridge itself, or the reactive bone around a fibrous one, is a bone finding.
CT also does the follow-up work MRI is poorly suited for: checking fracture union months after surgery, confirming hardware position, and screening for loosening or nonunion around plates and screws. A newer variant, weight-bearing cone-beam CT, scans the foot while the patient stands on it, capturing how the arch and midfoot joints actually behave under load — something no supine scan can show.
A modern ankle or foot CT is acquired as a stack of thin, sub-millimetre axial slices on a sharp bone reconstruction kernel, which favors edge detail over noise suppression so cortical margins and fracture lines stay crisp. From that isotropic axial data, the scanner or the workstation builds sagittal and coronal reformats — and for the hindfoot these are frequently angled to the anatomy of the subtalar and ankle joints rather than left aligned to the scanner's own axis, so the posterior facet and the tibiotalar joint line show cleanly in one plane. Most studies also include, or can generate, a 3D surface render of the bones, which is useful for visualizing fragment displacement or coalition shape at a glance before returning to the 2D slices for measurement.
Your ankle or foot CT files are parsed and rendered entirely on your device using JavaScript and the Canvas API. Nothing is sent to a server. Files sit temporarily in IndexedDB until you clear them.
No PACS client, no Java plugin, no desktop app. Open the browser, drop the study, and start reviewing the hindfoot and midfoot. Works on Chrome, Firefox, Safari, and Edge.
Move through hundreds of thin axial slices with keyboard shortcuts or the slider. A thumbnail strip keeps your position visible as you track a fracture line through the talus or calcaneus.
Presets tuned for cortical bone detail alongside a soft tissue window, so a cortical step-off and the surrounding swelling are both visible without hand- tuning the levels yourself.
Ankle and foot studies commonly ship with axial, sagittal, and coronal reconstructions in the same series. The viewer groups them in a sidebar so you can switch planes without losing your slice position.
After AI analysis, download a structured PDF covering fracture findings, joint involvement, and severity grading to bring to your orthopedic follow-up.
Beyond scrolling, the viewer lets you window specifically for bone, measure the width of a Lisfranc diastasis or the diameter of a talar dome osteochondral defect, and switch freely between the axial stack and the sagittal or coronal reformats already in the study. Because the source slices are isotropic, you can also build your own multiplanar reconstruction or a 3D render on the fly, which is often the fastest way to judge how a calcaneal fragment sits relative to the posterior facet.
CT reports on the ankle and foot lean on a specific vocabulary. “Intra-articular step-off” means the joint surface itself is no longer flush, which is the detail that usually pushes a fracture toward surgical fixation. “Comminution” describes a fracture broken into three or more pieces rather than a clean two-part break, and it directly affects how a surgeon plans hardware. “Subtalar involvement” flags that the fracture line crosses into the joint between the talus and calcaneus, which carries a higher risk of stiffness and post-traumatic arthritis. “Coalition” in a report refers to that abnormal bridge between tarsal bones noted earlier, and the report will usually specify whether it looks bony, fibrous, or cartilaginous based on how sharp or blurred the bridge appears.
CT is the strongest tool available for bone: it shows fracture lines, fragment displacement, joint step-off, coalitions, and hardware position with a sharpness MRI cannot match. It is far weaker, though, at everything that is not bone. Ligaments such as the ATFL and CFL, tendons like the peroneals and posterior tibial tendon, and the cartilage lining the joint surfaces all show as similar, low-contrast soft tissue on CT. When the clinical question is a ligament tear, tendon rupture, or early cartilage damage rather than a fracture, MRI is the right study — CT and MRI answer different questions on the same joint, and reports often reference both.
An X-ray shows that a fracture exists; a CT shows exactly how the pieces are arranged. For pilon, malleolar, and calcaneal fractures, surgeons need the fragment count and displacement that only thin CT slices provide before choosing plates, screws, or a staged approach.
Sanders grades calcaneal fractures by counting articular fragments on the coronal CT view through the posterior facet, from a single non-displaced fracture line up to four or more fragments. The grade strongly influences whether surgery is recommended and what outcome to expect.
Yes. Load the axial or coronal series through the midfoot, zoom into the space between the base of the first and second metatarsals, and use the measurement tool to check the gap in millimetres against your radiologist's report.
A bony coalition is straightforward to see as a solid bridge between two tarsal bones. A fibrous or cartilaginous coalition is subtler and shows up as narrowing, irregularity, or reactive changes at the joint rather than a solid bridge, which is why some suspected coalitions still get an MRI alongside the CT.
Not reliably. CT is excellent for bone but has little soft tissue contrast, so ligaments like the ATFL and CFL and tendons like the peroneals are hard to distinguish from surrounding tissue. If ligament or tendon injury is the main concern, MRI is the appropriate study.
Weight-bearing cone-beam CT scans your foot while you stand on it, which reveals how the midfoot and arch behave under real load instead of relaxed on a table. It is typically ordered for subtle Lisfranc injuries, flatfoot collapse, or arch alignment questions that a standard supine CT cannot answer.
Your files never leave your browser. Parsing and rendering happen client-side, so we cannot see, access, or store your images. Closing the tab or clearing site data removes everything.
Yes. Upload a follow-up CT and compare the fracture line and hardware position slice-by-slice against the original study to see progress toward union, or flag any hardware loosening for your surgeon to review.
See supported file and archive formats → for the complete list.
Ankle and foot CT studies are natural candidates for 3D and MPR because the isotropic, sub-millimetre axial data reconstructs cleanly in any plane. A 3D bone render is particularly useful for visualizing calcaneal fragment displacement or the shape of a tarsal coalition before drilling into individual slices. Render quality still depends on slice thickness, spacing, the reconstruction kernel used at acquisition, and your device's memory.
Learn how 3D DICOM viewing worksOn Analyze My Ankle, the viewer helps you inspect ankle scans and connect the images to common injury patterns before a clinician visit.
Review ligament sprains, Achilles tendon tears, osteochondral lesions, stress fractures, peroneal tendon injury, and tarsal tunnel patterns.
Use the ankle condition and learn pages to prepare better questions about instability, swelling, tendon pain, and joint-surface injury.