'Stipple sign’ in transitional cell carcinoma of the renal collecting system is best demonstrated by
An intravenous pyelogram, also called an intravenous urogram, is a radiological procedure used to visualize abnormalities of the urinary system, including the kidneys, ureters, and bladder.
Intravenous urography
Retrograde pyeloureterography
Radionuclide scan
Ultrasound scan