When storing digital fluoro-spot images in PACS, what type of image compression allows restoration to the original resolution?

The correct response highlights the importance of lossless compression in the context of digital fluoro-spot images stored in PACS (Picture Archiving and Communication Systems). Lossless compression refers to a method of reducing the file size of images without losing any of the original data. This means that when the image is decompressed, it can be restored to its original resolution, maintaining all the critical details and quality of the image.

This aspect is especially significant in medical imaging, where precise detail is essential for diagnosis and treatment planning. Lossless compression ensures that practitioners have access to the highest fidelity of the images for accurate interpretation.

In contrast, other forms of compression, such as lossy compression, reduce file size by permanently eliminating some data, which can compromise image quality and resolution. Level compression and window compression do not specifically refer to methods that ensure restoration to the original resolution, making lossless compression the most suitable choice for the preservation of image integrity in medical applications.