I am an x-ray tech. I also have had dexa training. An ap view of your hip and lumbar spine view is taken. A zipper unless covering the area being x-rayed should be ok but I have my patients in a gown so there is nothing in the way of the lumbar Spine and hip joint. If the zipper was not on top of the ap l-spine or hip hoint when taking x‐ray it should have been ok. Next time where a gown.