Hi, I noticed that the DICOM cine loops do not have metadata with the original acquisition frame rate, which makes it hard to account for frame rate effects (not sure if this was intended to make the challenge more difficult). We also noticed that pixel spacing metadata (PhysicalDeltaX or PixelSpacing) was missing as well, which is typically present in anonymized ultrasound DICOMs to allow for pixel measurements to be converted to real-world units. Is this metadata available elsewhere or are the challenge tasks intended to be solved without time/spatial scaling information? Thanks!

Created by Nick Quach nicolastquach
Thank you for flagging this. We have investigated and can confirm the following: **Frame rate** (`FrameTime, CineRate`): These tags are absent from the released DICOMs. This is a consequence of the DICOM anonymisation pipeline applied prior to data transfer and affects all files consistently across all splits and tasks. **Pixel spacing** (`SequenceOfUltrasoundRegions, PixelSpacing`): Also absent for the same reason. `NumberOfFrames`: Present in all files across all tasks and splits. This can be read directly from each DICOM and used as a proxy for relative temporal information within a clip. Participants should develop methods that do not assume physical temporal or spatial calibration metadata is available at inference. This is consistent with established echo AI benchmarks and reflects realistic deployment conditions in heterogeneous clinical environments.

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