Podcast
Questions and Answers
During which phase of renal CT imaging is the renal cortex well enhanced while the medulla is poorly enhanced?
During which phase of renal CT imaging is the renal cortex well enhanced while the medulla is poorly enhanced?
- Excretory phase
- Late arterial (corticomedullary) phase (correct)
- Nephrographic phase
- Equilibrium phase
In which renal CT imaging phase do both the renal cortex and medulla exhibit a similar degree of contrast enhancement?
In which renal CT imaging phase do both the renal cortex and medulla exhibit a similar degree of contrast enhancement?
- Early arterial phase
- Late arterial (corticomedullary) phase
- Excretory phase
- Nephrographic phase (correct)
Which renal CT imaging phase is most valuable for evaluating the collecting system?
Which renal CT imaging phase is most valuable for evaluating the collecting system?
- Excretory phase (correct)
- Late arterial (corticomedullary) phase
- Nephrographic phase
- Venous phase
What is the typical scan delay for acquiring the late arterial (corticomedullary) phase in renal CT imaging?
What is the typical scan delay for acquiring the late arterial (corticomedullary) phase in renal CT imaging?
The nephrographic phase of renal CT imaging is typically acquired after a scan delay of how many seconds?
The nephrographic phase of renal CT imaging is typically acquired after a scan delay of how many seconds?
What is the approximate range of scan delays (in minutes) for optimal opacification of the collecting system during the excretory phase?
What is the approximate range of scan delays (in minutes) for optimal opacification of the collecting system during the excretory phase?
If a renal CT scan is performed with a 60 second delay, which phase is most likely represented?
If a renal CT scan is performed with a 60 second delay, which phase is most likely represented?
A radiologist wants to assess a suspected ureteral obstruction. Which phase of renal CT imaging would be most beneficial?
A radiologist wants to assess a suspected ureteral obstruction. Which phase of renal CT imaging would be most beneficial?
What is the primary characteristic that distinguishes the late arterial (corticomedullary) phase from the nephrographic phase?
What is the primary characteristic that distinguishes the late arterial (corticomedullary) phase from the nephrographic phase?
A renal CT scan is performed and the images show contrast filling the renal pelvis and ureters. Which phase of imaging is most likely represented by these images?
A renal CT scan is performed and the images show contrast filling the renal pelvis and ureters. Which phase of imaging is most likely represented by these images?
Flashcards
Late arterial (corticomedullary) phase
Late arterial (corticomedullary) phase
Renal cortex is well enhanced, while the medulla is poorly enhanced.
Nephrographic phase
Nephrographic phase
Renal cortex & medulla exhibit a similar degree of contrast enhancement.
Excretory phase
Excretory phase
Optimal opacification of the collecting system; useful for evaluation of the collecting system.
Study Notes
- Late arterial (corticomedullary) phase occurs with a 45-second delay.
- In the late arterial phase, the renal cortex enhances well, while the medulla enhances poorly.
- The nephrographic phase occurs with a 90-200 second delay.
- In the nephrographic phase, the renal cortex and medulla enhance similarly.
- The excretory phase, useful for evaluating the collecting system, occurs with a 3-15 minute delay (more than 200 seconds).
- The scan delay for optimal opacification of the collecting system in the excretory phase is variable.
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