An X-ray of the scapula (shoulder blade) is a safe and painless test to visualise the shoulder blade and the soft tissues (skin and muscles) surrounding it using small amount of radiation. Scapula is a triangle shaped bone which connects the collarbone to your upper arm bone and the chest wall. The image is recorded on a special x ray film. The X-ray image is black and white. Dense structures such as the bones, appear white and softer body tissues, such as the skin and muscles appear darker. The actual exposure time to radiation is usually less than a second, although the overall test may take 15-20 minutes.