Nuclear Medicine Genitourinary System Exam Questions with 100% Correct Answers

Nuclear Medicine Genitourinary System Exam Questions with 100% Correct Answers What percentage of renal plasma flow is filtered through the glomerulus, and what percentage is secreted by the tubules? - answer20% of renal plasma flow is cleared by glomerular filtration 80% is cleared by tubular secretion Which nonradioactive drugs used to calculate glomerular filtration rate (GFR) and effective renal plasma flow (ERPF) are considered to be the reference standards? - answerInulin for GFR Paraaminohippurate (PAH) for ERPF Which radiopharmaceuticals are most often used clinically for measurement of GFR and ERPF? - answerTc-99m diethylenetriamine pentaacetic acid (DTPA) for GFR. Tc-99m MAG3 is currently used. What is the mechanism of renal uptake for 99mTc-MAG3? DTPA? - answerMAG3- Tubular secretion DTPA- Gloerular filtration What is the percent cortical binding of Tc-99m DMSA - answer40-50% The time-to-peak activity of a renal time-activity curve (TAC) represents... - answerUptake and clearance are occurring simultaneously over a period because of several factors that include an imperfect bolus, the percent first-pass extraction fraction of the radiotracer, the amount of recirculating radiotracer, and the normal variability of nephron function Differential renal function is evaluated by... - answer2 kidneys, 2 backgrounds and the aorta At what step in the renin-angiotensin-aldosterone cascade does captopril work? In which organ does this occur? - answerCaptopril blocks the conversion of angiotensin I to angiotensin II in the lungs. Direct radionuclide cystography - answer- Cystography requiring urinary tract catheterization and infusion of radiotracer into the bladder- More sensitive method for detecting vesicoureteral reflux- Reflux can be detected during bladder filling as well as voiding Indirect radionuclide A patient is scheduled for an indirect cystogram. The technologist should: prepare a catheter setup for instillation of the tracer prepare the tracer dosefor intravenous injection prepare for the instillation of both the tracer and furosamide prepare instillation of the tracer dose and iv injection of furosimde - answerB The best view for demonstrating a horseshoe kidney is the: - answerAnterior When imaging a patient with a ptotic kidney, the technologist should take images in the: - answerSupine and upright positio