Final answer:
One of the best ways to demonstrate a dilated ureter at the UPJ (ureteropelvic junction) is through imaging techniques such as intravenous pyelography (IVP) or ultrasound.
Step-by-step explanation:
One of the best ways to demonstrate a dilated ureter at the UPJ (ureteropelvic junction) is through imaging techniques such as intravenous pyelography (IVP) or ultrasound.
IVP involves injecting a contrast dye into the patient's vein, which shows up on X-ray images and helps visualize the structures of the urinary system, including any dilations or blockages in the ureter at the UPJ.
Ultrasound is a non-invasive imaging technique that uses high-frequency sound waves to produce real-time images. By using ultrasound, a healthcare provider can visualize the ureter and look for any signs of dilation at the UPJ.