I had xrays of my lower back recently and the following was part of the report. I don t really understand any of this. Can you please help me understand. There is a curvilinear opacity overlaying the left upper quadrant seen only in the AP projection. While pathological calcification within the abdomen cannnot be excluded, this appearance is new from the prior study, decreasing the likelihood that this is a significant finding. This could reflect overlying artifact or bowel contents. A punctate opacity overlying the superior pole of the right kidney on the current view was noted to be projected more superiorly on the prior study and is likely a hepatic granuloma. Impression: Curvilinear opacity over the left upper quadrant of the abdomen is likely artifactual. A repeat abdominal radiograph is recommended and CT would be indicated if this opacity persists.