Results from an optimisation of grid design in diagnostic radiology
1995 (English)In: Radiation Protection Dosimetry, ISSN 0144-8420, Vol. 57, no 1, 211-215 p.Article in journal (Refereed) Published
Results of an optimisation of grid design using a Monte Carlo model of the imaging chain are presented. Patient dose is significantly reduced by changing from aluminium to fibre grid covers and interspaces while keeping contrast constant. Numerous commercial grids have been investigated to identify superior designs. For optimal use, grids with high strip density require thinner lead strips and higher ratios than grids with low strip density. In paediatric radiology, grids with very thin strips (10-20 µm), or an air gap can be considered. In an adult lumbar spine examination, the optimal grid ratios are higher (greater than 15) than in commercial grids. This is particularly accentuated for grids with high strip density, fibre interspaces and in the lateral view. For a given imaging task, it is possible to identify grids of different design that have good performance, provided an appropriate strip width and tube potential are selected.
Place, publisher, year, edition, pages
1995. Vol. 57, no 1, 211-215 p.
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-20938OAI: oai:DiVA.org:liu-20938DiVA: diva2:236842