What Can I Expect During a Renal Scan?

Normal kidneys are located on both sides of the lumbar spine, with the upper and lower extremes of the two kidneys being closer. The long axis of the two kidneys is in the shape of an "eight". Generally, the upper kidney is flat on the 1st thoracic spine and the lower pole is flat on the 3rd lumbar spine. Apart from the sparse distribution, the rest are evenly distributed. There is no significant difference in radioactive distribution when compared on both sides.

Radionuclide renal scanning is the application of selective concentration and excretion of radionuclide-labeled compounds by the kidney to visualize the kidney through an in vitro scanner scan. Based on the obtained images, the position, shape, size, and radiation distribution density of the two kidneys were analyzed for comparison, and a diagnosis was made in conjunction with the clinical condition. When renal artery stenosis causes renal atrophy, renal scans show that the affected kidney is smaller than normal, the radioactive distribution is sparse, and uneven. The contralateral kidney may have a modern compensatory hypertrophy. If renal artery stenosis has not yet caused a change in renal function, there may be no obvious abnormal changes in the renal scan.

Name: Radionuclide kidney scan

category: Renal function

Normal radionuclide kidney scan

Clinical significance of radionuclide renal scan

Abnormal results: (1) Abnormal kidney position such as drooping kidneys, swimming kidneys. In the supine position, the kidneys are in the normal position; when standing, the kidney position moves down depending on the body position. If renal function is impaired, the radioactive distribution is sparse and loses its normal form. (2) The congenital malformed horseshoe kidney is connected to the lower pole of the kidney, and the vertical axis is in the shape of an inverted "eight". The radiation distribution is uniform, the outline is clear, and the edges are neat. Polycystic kidney disease is generally bilateral. The degree of kidney enlargement depends on the number and size of the cysts. Generally, the kidney enlargement is about normal! 2-3 times of the kidney. The scan shows that the kidney loses its normal shape, the outline is not clear, and the edges are not clear. Neat, uneven distribution of radioactivity, sparse patch-shaped or round defects of varying sizes. People to be checked: Those suspected of having kidney abnormalities.

Precautions for radionuclide kidney scans

Unsuitable crowd: Generally there is no unsuitable crowd. Contraindications before the test: Maintain a regular schedule and diet to help the test run smoothly. Requirements during examination: This examination does not require special preparation. Generally, the prone position is taken, the patient's waist is straight, and the spine is aligned with the center line of the probe so that the kidneys on both sides are within the effective field of view of the probe. After intravenous injection of the scanning agent, the scanner was used to scan the kidney area outside the body within a certain period of time, and the kidney pattern was directly printed out or the kidney picture was taken with a scintillation camera. Anatomical signs of the spine and zygomatic bone are made on the scan.

Radionuclide kidney scan procedure

Renal scan is an in vitro development of intravenously injected radionuclide-labeled compounds secreted, concentrated, and excreted by the kidney, and obtained in vitro using a scanner to understand the position, size, morphology, and internal changes of the kidneys on both sides. method. There are two types of static development and dynamic development. Scanners commonly used for static development include 99m -DTPA, 113m indium-DTPA, 99m -DMSA (Dimerca-pto-Succinic dimercaptosuccinic acid), 99m-TMA (thiomalic acid). . Tritium penicillamine. About 50% of 99% -DMA injection is firmly bound to the renal cortex one hour after the injection, so the concentration of renal cortex remains stable within 15 hours, and the development is clear. 40-48% of 99% -TMA is bound to the renal cortex. The renal cortex is also clear. The commonly used scanning agent for dynamic development is 131 iodine and o-iodine sodium urate, which can be quickly absorbed, concentrated and excreted by the kidneys. Gamma cameras were used for continuous timed photography to obtain continuous images of the absorption, concentration, and excretion of the scanner by the kidneys.

Radionuclide kidney scan related diseases

Renal artery stenosis, Pediatric renal amyloidosis, Pediatric giant bladder-giant ureter syndrome, Pediatric urinary tract infection, Renal cell carcinoma, Lower gastrointestinal bleeding, Renal droop, Chondrosarcoma, Chronic pyelonephritis, Posterior urethral valve