Comparison of manufacturer-prescribed and patient-centric CT-table heights for computed tomographic bone mineral density assessment.

R Rossi , Maciej Parys, Yi Lin Tan, Tobias Schwarz, Sumari Dancer

Research output: Contribution to conferencePosterpeer-review

Abstract / Description of output

Introduction / Purpose: Computed tomographic bone mineral density (CT-BMD) protocols of CT-manufacturers include the use of a specific CT-table height setting. CT-BMD protocols can be used for the canine head. To integrate CT-BMD into a clinical CT study, it would be advantageous to use the table height setting optimal for the size of the dog. The aim of this study is to investigate the effect of table height changes in of CT-BMD measurements in dogs compared to the prescribed table height.
Methods:
The minimum and maximum table heights from 50 clinical canine head CT studies were recorded. Five canine cadaver heads were imaged with the manufacturer-prescribed table-height and patient-centric table-heights. CT-BMD values were obtained from the calvarium at the level of the temporomandibular joint. Calculared CT-BMD values were analysed using one-way ANOVA with Geisser-Greenhouse correction and Holm-Sidak’s multiple comparisons test.
Results:
Minimum, maximum patient-height and cadaver-head-centric table heights were included (100, 223, 249, 268, 295mm) and compared to the manufacturer-prescribed table height (125mm) for CT-BMD values. Statistical analysis showed a significant difference between values obtained from manufacturer-prescribed and patient-centric table-height protocols (pDiscussion / Conclusion:
This study indicates that table-height changes influence CT-BMD values significantly in the canine head. Manufacturer-prescribed CT protocols are designed for a lumbar vertebra of a supine-positioned human in the CT-gantry isocentre. The head of a prone-positioned dog is usually in the CT-gantry isocenter at a different table height. Further studies are needed to establish optimal table height for maximal CT-BMD accuracy.
Original languageEnglish
Pages191
Publication statusE-pub ahead of print - 17 Sept 2022
Event2022 EVDI Annual Congress - scotland, Edinburgh, United Kingdom
Duration: 14 Sept 202217 Sept 2022
https://www.evdi-congress.eu/evdi_online_congress

Conference

Conference2022 EVDI Annual Congress
Country/TerritoryUnited Kingdom
CityEdinburgh
Period14/09/2217/09/22
Internet address

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