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- W2366445981 abstract "OBJECTIVE:To compare the registration accuracy of SPECT/CT images using the visual method and the method of external markers,and optimize the number and distribution of markers while using the registration method of external markers.METHODS:By using an in house 2D motion platform system to simulate the respiratory motion,the mean square deviation (f) of N external markers coordinated between two kind of images was used as a similarity evaluating index to measure the accuracy of two-image registration.RESULTS:When the phantom remained static,the difference of the f values among the different registration methods was little.But under the different conditions of motion,doing single-factor analysis of variance for the f value groups of 7 registration methods,the results showed that the method using not less than five markers were obviously different from using the visual method and three-marker registration method,and the former was superior to the latter(P0.05),but among the registration methods using not less than five markers the differences were not obvious(P0.05).For different researchers,the f values using visual method were different.The optimizing results for five-marker method showed that non-coplanar distribution of the markers was superior to coplanar distributing.CONCLUSIONS:The visual method is easily impacted by the subjective factors,and the accuracy can not be guaranteed.Using five external markers distributing non-coplanar is an accurate and simple method for SPECT/CT image registration." @default.
- W2366445981 created "2016-06-24" @default.
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- W2366445981 date "2009-01-01" @default.
- W2366445981 modified "2023-09-23" @default.
- W2366445981 title "Different SPECT/CT image registration methods using motion-phantom" @default.
- W2366445981 hasPublicationYear "2009" @default.
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