Long gray-scale is synonymous with:

Long gray-scale is characterized by low contrast and a wide range of shades of gray. This means that images with long gray-scale display subtle differences between the shades, allowing for a more gradual transition from white to black. This characteristic is essential in medical imaging, as it enables better visualization of soft tissue structures and details that may be missed in high-contrast images where fewer shades are present. By utilizing many shades of gray, long gray-scale enhances the diagnostic capabilities of imaging, facilitating clearer differentiation between various anatomical features.