Do CT KUBs really expose patients to more radiation than plain abdominal radiographs?
BAUS ePoster online library. Yang B. 06/24/19; 259464; P1-5
Mr. Bob Yang
Mr. Bob Yang
Login now to access Regular content available to all registered users.

You may also access this content "anytime, anywhere" with the Free MULTILEARNING App for iOS and Android
Rate & Comment (0)

Urolithiasis patients often require repeated and frequent urinary tract imaging, leading to high radiation exposure. CT Kidney-Ureter-Bladder (CT-KUB) is the gold standard in urolithiasis detection, however is commonly thought to harbour significant radiation load. Urologists have therefore utilised abdominal radiographs of the kidney-ureter-bladder (XR-KUB) as an alternative, though with significantly lower sensitivity and specificity.

Historical guidelines state the Effective-Dose of XR-KUBs at 0.8mSv. However no UK data exists comparing the contemporary radiation Effective-Dose between XR-KUBs and CT-KUBs.

We compared the radiation Effective-Dose (mSv) in patients who has recently had both an XR-KUB and CT-KUB.


53 patients were retrospectively identified who underwent both a XR-KUB and a CT-KUB in 2018. Effective-Dose was measured by converting the recorded 'Dose Area/Length Product' via the International Commission on Radiological Protection report 103 formulation.


The average Effective-Dose for XR-KUBs was 5.10mSv [Range: 0.8 - 42.4]. The average Effective-Dose for CT-KUBs was 5.31mSv [Range: 1.4 – 30.5].
18/53 (34%) of patients underwent XR-KUBs with higher radiation Effective-Dose levels than their following CT-KUB.
Patients with higher BMIs received greater doses for both XR-KUB and CT-KUB.


The Effective-Dose of XR-KUB was on average 5-fold higher than historically referenced. Furthermore, for 1-in-3 patients, the radiation Effective-Dose of CT-KUBs was less than that of the preceding XR-KUB.

Given the higher than expected radiation dose associated with XR-KUBs and its' limited sensitivity/specificity, other imaging modality such as Ultrasound-KUB and CT-KUB should be considered.
    This eLearning portal is powered by:
    This eLearning portal is powered by MULTIEPORTAL
Anonymous User Privacy Preferences

Strictly Necessary Cookies (Always Active)

MULTILEARNING platforms and tools hereinafter referred as “MLG SOFTWARE” are provided to you as pure educational platforms/services requiring cookies to operate. In the case of the MLG SOFTWARE, cookies are essential for the Platform to function properly for the provision of education. If these cookies are disabled, a large subset of the functionality provided by the Platform will either be unavailable or cease to work as expected. The MLG SOFTWARE do not capture non-essential activities such as menu items and listings you click on or pages viewed.

Performance Cookies

Performance cookies are used to analyse how visitors use a website in order to provide a better user experience.

Save Settings