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• W2989668059 abstract "Abstract Patient-specific computational modeling is increasingly used to assist with visualization, planning, and execution of medical treatments. This trend is placing more reliance on medical imaging to provide accurate representations of anatomical structures. Digital image analysis is used to extract anatomical data for use in clinical assessment/planning. However, the presence of image artifacts, whether due to interactions between the physical object and the scanning modality or the scanning process, can degrade image accuracy. The process of extracting anatomical structures from medical images introduces additional sources of variability, e.g., when thresholding or when eroding along apparent edges of biological structures. An estimate of the uncertainty associated with extracting anatomical data from medical images would therefore assist with assessing the reliability of patient-specific treatment plans. To this end, two image datasets were developed and analyzed using standard image analysis procedures. The first dataset was developed by performing a “virtual voxelization” of a computer-aided design (CAD) model of a sphere, representing the idealized scenario of no error in the image acquisition and reconstruction algorithms (i.e., a perfect scan). The second dataset was acquired by scanning three spherical balls using a laboratory-grade computed tomography (CT) scanner. For the idealized sphere, the error in sphere diameter was less than or equal to 2% if five or more voxels were present across the diameter. The measurement error degraded to approximately 4% for a similar degree of voxelization of the physical phantom. The adaptation of established thresholding procedures to improve segmentation accuracy was also investigated." @default.
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• W2989668059 date "2019-12-01" @default.
• W2989668059 modified "2023-09-27" @default.
• W2989668059 title "Toward Estimating the Uncertainty Associated With Three-Dimensional Geometry Reconstructed From Medical Image Data" @default.
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• W2989668059 doi "https://doi.org/10.1115/1.4045487" @default.
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