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- W4229792019 abstract "The UK Department of Health Assessment Group ImPACT (Imaging Performance Assessment of CT Scanners), has been in existence for nearly twenty years at St George's Hospital, London. It exists for the purpose of type testing CT scanners, and for providing advice to the National Health Service on the purchase of CT scanners. During this time two main phantom sets have been employed, and the more recent set has been used for nearly 10 years. With this phantom set most CT scanners that have been on the UK market over this time period have been tested. The increasing sophistication of modern scanners has introduced new problems with some of the measurement techniques and for this reason the phantom set has been reviewed. A new set of phantoms has been designed and is currently under construction. Conformation to a standard would be desirable, however there is no accepted standard phantom size or composition in CT, other than for dosimetry. In addition, the overiding essential criterion for a phantom for the ImPACT measurements is continuity with data already in existence taken from over twenty different scanners. The phantoms will therefore contain some of the essential features of the existing phantoms, in particular the dimensions and composition, which are of importance for the continuity of performance parameters such as noise and dose. In addition, where a technique, such as the assessment of high contrast resolution, may effect results, the technique will remain the same but additional methods may be incorporated to ensure compatibility with the manufacturers' methods and data." @default.
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- W4229792019 date "1993-09-01" @default.
- W4229792019 modified "2023-09-29" @default.
- W4229792019 title "Ten Years Experience of a Phantom Set in CT Scanning" @default.
- W4229792019 doi "https://doi.org/10.1093/rpd/49.1-3.235" @default.
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