Which of the following agents is used to measure Glomerular Filtration Rate (GFR)?: (A) Iodohippurate, (B) Tc99m-DTPA, (C) Tc99m-MAG3, (D) Tc99m-DMSA
Answer is B. Tc99m-Diethylene Triamine Pentothenic Acid (DTPA) is an agent of choice widely used in measuring GFR. Ref: Renal Disease: Techniques and Protocols By Michael S Goligorsky, Page 87; Paediatric Uroradiology By Richard Fotter, ALbe L Bae, Page 47