Practice

You will review a series of CT images. Use the viewer to zoom, pan, and window each image, then record whether you see SLAAO Type 1, Type 2 (and its variant), and any LAA thrombus. Overall SLAAO is derived automatically. Responses are saved as you go and downloaded as a CSV at the end.

Viewer controls

WW/WL: tap WW/WL, then drag - left/right for window width, up/down for window level (brightness and contrast).
Zoom: pinch with two fingers, or tap Zoom and drag up/down.
Pan: tap Pan and drag to move a zoomed image.
Invert flips greyscale. Reset returns to the default view.
Scroll: where a cine is available, tap ↕ Scroll to scroll the acquisition for orientation. Adjudicate only on the fixed image.

Note: images are 8-bit exports, so windowing adjusts brightness/contrast of the exported frame rather than recovering raw Hounsfield detail.

Enter your reader ID (name or initials)

Case 1

eCTA

This is the image you should adjudicate

Type 1

Absent Present

Type 2

None Rim (R) Pooling (P)

Thrombus

Absent Present

Overall: NEGATIVE

Drag up / down to scroll ↕

◐WW/WL

🔍Zoom

✥Pan

◑Invert

↻Reset

Review & submit

Click any row to revisit a case. When ready, submit to download your responses.