To assess the function of the urinary system of the body and identify its diseases, the doctor will offer you several research options - this will be either CT, ultrasound, urography or MRI of the kidneys. But what to choose? Let us dwell on the last two methods. The human urinary system includes the ureters, renal pelvis, bladder, and prostate. The complexity of the device of this system causes a large number of research methods.
Urography or MRI of the kidney: research principle
Renal urography, unlike MRI, is an x-ray examination method. With the passage of urography by MRI Scan Centres in East Delhi, a contrast agent is injected into the patient, which is subsequently excreted through the kidneys. There are three types of urography:
- Overview, without contrast;
- Excretory, take a picture sometime after the introduction of contrast;
- Intravenous, contrast is injected into a vein, after which 3–4 shots are taken at the second, fifth and seventh minutes, which allows us to estimate the rate at which contrast is removed.
Normally, contrast agents should not accumulate in the tissues or be modified but should be well excreted through the kidneys. Usually, use radiopaque preparations based on iodine.
Urography is prescribed for:
- Infectious processes in the kidneys;
- Suspected neoplasm;
- Developmental abnormalities;
- Kidney diseases (nephroptosis, hydronephrosis).
Indications for kidney MRI are almost the same as for urography, but this method of research is not X-ray but MRI test labs in Delhi uses a magnetic field to take pictures, which is practically harmless to the body. Also, with MRI, layer-by-layer images of the organ are obtained, which are then combined into a three-dimensional image using a computer program. Tomography can also be performed with or without a contrast, which contains gadolinium salts.
Urography or MRI: Advantages and Disadvantages
Both urography and MRI can reveal some pathologies of the kidneys, as well as a violation of their excretory function. So, with their help, you can detect:
- Hydronephrosis of one kidney or both;
- Kidney prolapse (nephroptosis);
- Developmental abnormalities (horseshoe kidney);
- Stones in the pelvis, ureters;
- Ureteral trauma;
- Benign, malignant tumors.
But, unlike MRI, urography gives a picture in which the shadows of the organs overlap, which does not always make possible the successful detection of pathology. Especially often get a good picture to interfere with gases in the intestine.
Also, the urography has the following number of disadvantages:
- Low quality of the image, which does not allow to look at tiny formations (MRI visible education less than 1 cm);
- Irradiation with ionizing rays (in some cases, it is quite high, since several pictures are taken during urography);
- The inability to qualitatively study the structure of the kidneys;
- High allergic of iodine-containing contrast (as compared with gadolinium-based preparations);
- Urography cannot be performed on children.