An X-ray or imaging procedure that visualizes both the bladder and the renal pelvis after injecting contrast dye.
From Greek 'kystis' (bladder) + 'pyelos' (pelvis) + 'graphia' (recording/writing). A radiological term combining three elements to describe the imaging target.
Before modern ultrasound, doctors would inject dye into the urinary system and take X-rays to see how urine flowed—the dye lights up on images like a tracer showing the body's internal plumbing!
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