Ultrasound opening .l3d files

I am having issues opening a file created by a BK ultrasound machine.
The file extension is .l3d and it is a 3D ultrasound.

Any suggestions on how to open this file in Slicer?

Thank you

It is a proprietary format that Slicer cannot read. If you can get specification for the file format or reverse engineer it then we can help with writing an importer in Slicer. You may also ask BK if there is an option to save volumes in some standard format (e.g., DICOM, nrrd, mha, or nifti).