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- W2358743125 abstract "Objective To investigate the influence of different volume of interest(VOI) selection on the precision of registration between CT and Cone beam CT(CBCT) images applied in Image Guided Radiotherapy. Methods The planning CT images of an anthropomorphic phantom(RANDO) were acquired as references. Twenty sets of CBCT images with known displacements were registered to the CT images by selecting various VOI. Registration errors on the three orthogonal directions were recorded and analyzed. Results The minimum absolute errors were observed when a VOI of(35 ×35×35) cm3 was selected(mean =0.166 mm, SD = 0.087). Intermediate errors were produced by a VOI of(20×20×20) cm3(mean = 0.316 mm, SD = 0.144). A VOI of(10×10×10) cm3 led to the greatest errors(mean = 0.496 mm, SD = 0.219). Conclusion Paired t-test suggested that VOI of(35 ×35×35) cm3 achieved significantly higher accuracy of image registration in comparison to other VOIs(P0.001). The performance of VOI of(20×20×20) cm3 is significantly better than that of(10×10×10) cm3P= 0.003 0.01. The results show that image registration method using larger volume of interest is helpful to improve the registration accuracy." @default.
- W2358743125 created "2016-06-24" @default.
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- W2358743125 date "2015-01-01" @default.
- W2358743125 modified "2023-09-24" @default.
- W2358743125 title "Registration Accuracy Comparison of CT and Cone Beam CT Image Based on Different Volumes of Interested Selection" @default.
- W2358743125 hasPublicationYear "2015" @default.
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