![]() Images approaching this quality have also been produced on living trees using semiportable systems by other researchers Detailed images have been produced showing the ring structure of the wood and voids due to rot or decay. CAT can accurately image a wooden utility pole (since the size, density, and atomic elements of a pole are similar to the human head to torso), as was confirmed by imaging poles using the UMC nuclear engineering EMI-1010 medical scanner. Since the cost of replacing a pole ranges from hundreds to thousands of dollars, an accurate, nondestructive method is needed. The accuracy in identifying poles needing replacement using these techniques is ∼ 70%. Wooden utility poles are prone to rot and decay at ground level current techniques to assess this loss of strength are relatively primitive, i.e., tapping the pole (hitting the pole with a hammer) or boring into the pole for samples and then testing inside the bore hole with an electrical pulse device. CAT is a well-established medical technology that has recently been applied to a number of industrial applications. Work is under way at the University of Missouri, Columbia (UMC) to design, build, and test a portable computerized axial tomography (CAT) device for the nondestructive, field imaging of wooden utility poles. International Nuclear Information System (INIS) Design of a portable CAT scanner for utility pole inspection
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