12 Questions
When is a scanogram taken during a standard diagnostic computed tomography of the urinary tract?
Before the scan process begins
What phase are the scans obtained in approximately 70 seconds after i.v. contrast administration during computed tomography of the urinary tract?
Arterial phase
What is one of the indications for performing computed tomography of the urinary tract?
Evaluation of renal stone disease
Which of the following is NOT a possible use of computed tomography angiography in the assessment of renal vessels?
Evaluating heart valve functions
When performing computed tomography urinary tract examination, what is used to assess precontrast attenuation and enhancement patterns in the kidneys?
Pre- and post-i.v. contrast scans
In which position does the patient lie during a standard diagnostic computed tomography for renal tract malignancy?
Supine position
Which of the following criteria indicates a benign adrenal lesion on a delayed contrast-enhanced CT scan?
Both an absolute percentage washout (APW) greater than 60% and a relative percentage washout (RPW) greater than 40%
What is the primary purpose of performing an unenhanced CT scan in adrenal lesion characterization?
To measure the attenuation (in Hounsfield units) of any adrenal mass
What is the recommended technique for a CT scan of the kidneys, ureters, and bladder (CT KUB) to assess renal tract calculus disease?
Supine position, no contrast administration, and scanning from the top of the kidneys to the bladder base with a low-radiation-dose technique
In a computed tomography urogram (CTU), what is the purpose of the oral water load given before the intravenous contrast injection?
To induce a diuresis and collect system dilatation for better visualization
During a computed tomography urogram (CTU), at what time point is the nephrographic/parenchymal enhancement phase scan typically acquired?
100 seconds following the start of the bolus intravenous contrast injection
What is the primary limitation of a low-dose CT KUB scan without intravenous or oral contrast?
Limited role in identifying pathology other than renal tract calculus disease
Test your knowledge on the indications, techniques, and applications of computed tomography for imaging the urinary tract, including renal colic, renal tumors, renal collections, and more.
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