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Overview Brief

Computed tomography (CT) of kidneys, ureters, and bladder (CT-KUB/NCCT-KUB) is a quick non-invasive technique for the diagnosis of urolithiasis. [1] In this regards this article aims at providing an overview of NCCT-KUB with regards to procedural steps.

What is NCCT-KUB?

CT broadly refers to many types of imaging scans with differing amounts of contrast and variable image timing. In patients with nephrolithiasis, NCCT or CT-KUB radiography are most often used. [2]

CT exploits the different degrees to which body tissues can absorb radiation. Multiple data points are obtained by rotating a radiation source around the patient’s body. These data are processed by a computer into 3D images. As kidney stones have a different composition compared with renal parenchyma and urine, they absorb considerably more radiation and are easily identifiable without the need for contrast.

Almost all stones can be visualized using CT except for some stones that are caused by the precipitation of protease-inhibitor medications in the urine. [3]

How is NCCT-KUB performed?

Following are the steps to perform NCCT-KUB:

  • The patient is requested to lay flat on their back, side, or on their stomach during the NCCT scan.
  • Body parts not required to be imaged are covered with a lead apron to avoid exposure to the X-rays.
  • As any motion may affect the quality of examination, the patients are asked to stay still on the table; children may be given sedation, to keep them still.
  • Thereafter the patient is moved rapidly through the scanner.

Results obtained are interpreted by an oncologist to decide on a further line of treatment.

Side effects/risks of NCCT-KUB

The only risk of NCCT-KUB is the radiation to which one is exposed while performing NCCT-KUB. However, it is seen that low dose radiation is more than enough for obtaining a good quality image. [5]

Preparation before performing NCCT-KUB

As it is a non-contrast CT, generally there is no prior preparation before performing NCCT-KUB.

Post-care after NCCT-KUB

There is no requirement of post-care after NCCT-KUB, at the healthcare facility.

At Mfine, you will receive a holistic knowledge about NCCT-KUB which is required for the diagnosis of kidney stones.

Download the mfine app and consult a radiologist online.

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