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A computed tomography urography (CT urography or CT urogram) is a computed tomography scan that examines the urinary tract after contrast dye is injected into a vein. [1]In a CT urogram, the contrast agent is through a cannula into a vein, allowed to be cleared by the kidneys and excreted through the urinary tract as part of the urine.
The kidney is surrounded by a capsule separating the kidney from the echogenic perirenal fat, which is seen as a thin linear structure. [1] The kidney is divided into parenchyma and renal sinus. The renal sinus is hyperechoic and is composed of calyces, the renal pelvis, fat and the major intrarenal vessels.
Some forms of imaging, such as kidney ultrasound or CT scans, may assess kidney function by indicating chronic disease that can impact function, by showing a small or shrivelled kidney. [citation needed]. Other tests, such as nuclear medicine tests, directly assess the function of the kidney by measuring the perfusion and excretion of ...
European guidelines classify a pre-existing decreased kidney function to be a risk factor of contrast-induced nephropathy in the following cases: [5]. Estimated glomerular filtration rate (eGFR) < 45 ml/min/1.73 m 2 of body surface area before intra-arterial administration with first-pass renal exposure (not passing lungs or peripheral circulation before kidneys), or in the intensive care unit
Kidney infarction: CT scan of the abdomen showing partial infarct of the left kidney. Specialty: Nephrology: Symptoms: Abdominal pain, nausea, vomiting, and fever. [1] Complications: Acute kidney injury and chronic kidney disease. [1] Causes: Cardioembolic disease, renal artery injury, and hypercoagulable state. [1] Diagnostic method
The risks of CT scan radiation are especially important in patients undergoing recurrent CT scans within a short time span of one to five years. [ 157 ] [ 158 ] [ 159 ] Some experts note that CT scans are known to be "overused," and "there is distressingly little evidence of better health outcomes associated with the current high rate of scans."
A CT scan image showing a ruptured abdominal aortic aneurysm. CT Scan of 11 cm Wilms' tumor of right kidney in 13-month-old patient. Computed tomography of the abdomen and pelvis is an application of computed tomography (CT) and is a sensitive method for diagnosis of abdominal diseases. It is used frequently to determine stage of cancer and to ...
To monitor a kidney transplant. [1] The symptoms that a person may experience that cause the test to be requested may be blood in the urine, abdominal pain, abnormal kidney function tests, and frequent urinary tract infections (of which symptoms may include the need to pass urine frequently, pain on urination, and worsening urinary incontinence ...