A New NDE (Non-Destructive Evaluation) Capability for Thin-Shelled Structures.
Final rept. Oct 83-Apr 84,
ADVANCED RESEARCH AND APPLICATIONS CORP SUNNYVALE CA
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A new imaging modality suited for thin-shelled structures was evaluated for feasibility during Phase I. The approach is based on well-established digital tomosynthesis principles and modern real-time digital radiography techniques. A series of component radiographs of a structure taken from many different angles are manipulated according to a restorative algorithm to recover a set of images of parallel surfaces within and concentric to the natural shape of the object. Consequently, the proposed instrument, which has been designated a Digital Tomograph DT, is tailored for non-destructively evaluating structures which are fabricated in a laminar or multilayer fashion. A Phase II program to develop and demonstrate a pre-prototype scanner is proposed based on the Phase I cocneptual design. The preprototype DT system, with full imaging capabilities, although limited throughput capability, will be compatible with Phase III prototype commercialization. Additional keywords Laminography, Digital radiography. Author
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