Try our On-Premise document APIs to change background from DICOM files on .NET Framework, .NET Core, Windows Application, ASP.NET Web Application....transformations (resize, crop, flip&rotate, binarization, grayscale, adjust)...
Learn how to merge multiple SVG to PDF, XPS or Image formats using Render() method in Aspose.SVG for .NET and find C# examples of SVG merging....you to freely add any images, rotate, scale, add backgrounds, filters...