What is Nephrographic phase CT?
Table of Contents
What is Nephrographic phase CT?
The nephrogenic phase, also known as the nephrographic phase or the renal parenchymal phase, is a postcontrast injection time range in which there is an optimal enhancement of the renal parenchyma including the medulla.
What is Pyelographic phase?
The pyelographic or excretory phase is present 3 minutes after in- jection of IV contrast material (Fig. 1). In normal kidneys, the three phases of contrast media excretion are always symmet- ric in time of appearance, time of disappear- ance, and density [2].
What are the three phases of CT urogram?
The CT urogram is most commonly performed as a three-phase computed tomography technique used to evaluate the kidneys and urinary collecting system. The three phases most commonly include a non-contrast phase, a nephrographic phase scanned at 80 to 120 s delay, and an excretory phase scanned at 10–15 min delay (Fig.
What is a 4 phase CT scan?
Quadruple-phase CT consisted of early arterial, late arterial, portal venous, and delayed phase imaging. Scanning during each imaging phase was performed in the craniocaudal direction during a single breath-hold at deep inspiration.
What are the three phases of IV contrast enhancement?
Phases
| Phase | Time from injection |
|---|---|
| Early systemic arterial phase | 15-20 sec |
| Late systemicarterial phase Sometimes also called “arterial phase” or “early venous portal phase” | 35-40 sec |
| Pancreatic phase | 30 or 40 – 50 sec |
| Hepatic (most accurate) or late portal phase | 70-80 sec |
What is a Nephrogram?
Medical Definition of nephrogram : an X-ray of the kidney.
What is a delayed Nephrogram?
A delayed nephrogram, commonly described on plain film urography, but also visible on CT urography, is when there is absence or reduction of the normal renal parenchymal enhancement on the nephrographic phase images.
How long does a triple phase CT scan take?
You can expect your CT scan appointment to last approximately 15 minutes start to finish. If you are having a CT scan with oral contrast, it could take as long as an hour and 15 minutes. Once the CT scan is complete, a radiologist will study the images and share the results with your doctor.
What is CT delayed phase?
delayed phase defines relationship of solid renal mass relationship to collecting system. c. delayed phase facilitates identification of transitional cell carcinoma and traumatic injury. (2) Adrenal nodule characterization. a.
What is arterial phase in CT?
The early arterial phase, also known as the early systemic arterial phase, is a contrast-enhanced CT or MRI series, in which the contrast (e.g. iodinated or gadolinium) is still in the arteries and has not reached the organs and other soft tissues.
How is a Nephrogram done?
It is a diagnostic test performed in the nuclear medicine laboratory. A special radioactive drug, which has the property to be taken up and secreted by the kidneys, is administered intravenously (i.v.). Then, a special camera is placed behind the body at the height of the renal region.
What is striated Nephrogram?
Striated nephrogram is a descriptive term indicating an appearance of alternating linear bands of high and low attenuation in a radial pattern extending through the corticomedullary layers of the kidney on iodine-based intravenous contrast enhanced imaging.
What does a Nephrogram mean?
What is Xanthogranulomatous pyelonephritis?
Xanthogranulomatous pyelonephritis is a rare and aggressive variant of chronic pyelonephritis. It usually occurs due to chronic nephrolithiasis and infection. The diagnosis is often confused with renal cell carcinoma, and a computed tomography (CT) scan, as well as histology of the mass, helps to confirm the diagnosis.
Is a CT urogram the same as a CT abdomen and pelvis?
A CT (computerised tomography) scan uses x-rays and a computer to create a detailed picture of the inside of the body. A scan of the urinary system may be called a CT urogram, CT IVP (intravenous pyelogram) or a triple-phase abdomen and pelvis CT – these are different names for the same test.
What is a CT urogram excretory phase with contrast?
A CT urogram is a test using a CT scan and special dye (contrast medium) to look at the urinary system. The contrast medium helps show up the urinary system more clearly. You have a CT scan of your: kidney. bladder.
