Objectives: To assess the cross-centre consistency of iodine enhancement, contrast-to-noise ratio and radiation dose in a multicentre perfusion CT trial of colorectal cancer.
Materials And Methods: A cylindrical water phantom containing different iodine inserts was examined on seven CT models in 13 hospitals. The relationship between CT number (Hounsfield units, HU) and iodine concentration (milligrams per millilitre) was established and contrast-to-noise ratios (CNRs) calculated.
J Radiol Prot
December 2011
The implementation of the UK Control of Artificial Optical Radiation at Work Regulations 2010 requires the employer to perform a risk assessment of workers' exposure to UV radiation from phototherapy equipment in the hospital environment. The objective of this study was to demonstrate that, where the source spectrum is known, an assessment of exposure to UV sources commonly used in hospitals, including assessment of reflections and transmission through personal protective equipment, may be performed with sufficient reliability by radiometer measurement rather than by complex spectroradiometric measurements. An intercomparison of radiometer and spectroradiometer measurements of exposure to UV sources was carried out.
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