CT multiscan: Using small area detectors to image large components
- Argonne National Lab., IL (United States)
The small size and dynamic range of the best two-dimensional X-ray detectors are impediments to the use of three-dimensional X-ray computed tomography (3D-XRCT) for 100% inspection of large ceramic components. The most common industrial 3D-XRCT systems use a rotate-only geometry in which the X-ray source and the area detector remain stationary while the component placed between them is rotated through 360 deg. This configuration offers the highest inspection speed and the best utilization of X-ray dose, but requires that the component be small enough to fit within the X-ray/detector cone. Also, if the object is very dense, the ratio of an unattenuated X-ray signal to that through the longest path in the component may exceed the dynamic range of the detector.To some extent, both of these disadvantages can be overcome by using Multiscan CT, i.e., scanning small overlapping regions of a large component separately while maximizing the X-ray dose to each. The overlapping scans can then be combined seamlessly into a single scan with optimal contrast.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 397898
- Report Number(s):
- CONF-950629-; ISSN 0742-4795; TRN: IM9649%%106
- Journal Information:
- Journal of Engineering for Gas Turbines and Power, Vol. 118, Issue 4; Conference: 40. International gas turbine and aeroengine congress and exposition, Houston, TX (United States), 5-8 Jun 1995; Other Information: PBD: Oct 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
MO-PIS-Exhibit Hall-01: Imaging: CT Dose Optimization Technologies I
Use of multiple CT scans to accommodate large objects and stretch dynamic range of detectability