<prompt> Which of the following imaging modality is most sensitive to detect early renal tuberculosisIntravenous urographyUltrasoundComputed tomographyMagnetic resonance imaging  <response>: Ans. is a i.e., Intravenous Urography Intravenous urography or pyelography I VU or I VP is the most sensitive modality to detect early renal tuberculosis. In the early stages it shows irregularity or destruction of one or more renal papillae.For ultrasound, Campbell writes- Ultrasonography is of limited value in the initial investigation of the genitourinary TB.For CT, Campbell writes - CT is of limited value in the early investigation of genitourinary TB because intravenous urography gives such accurate pictures.For MRI, Campbell writes - MRI has very little application in the management of genitourinary TB 