4739481 X-ray CT image processing apparatus

1989 ◽  
Vol 13 (3) ◽  
pp. XIII
Keyword(s):  
Image Processing ◽  
Ct Image ◽  
X Ray

scholarly journals Detection of beetle damage in forests by X-ray CT image processing

2003 ◽  
Vol 27 (5) ◽  
pp. 747-752 ◽  
Author(s):  
Paulo Estevão Cruvinel ◽  
João de Mendonça Naime ◽  
Miguel Borges ◽  
Álvaro Macedo ◽  
Aijun Zhang
Keyword(s):  
United States ◽  
Image Processing ◽  
The United States ◽  
Correct Identification ◽  
South American ◽  
Ct Image ◽  
Damage Evaluation ◽  
Beetle Species ◽  
X Ray ◽  
Beetle Damage

Some beetle species can have devastating economic impacts on forest and nursery industries. A recent example is Anophophora glabripennis, a species of beetle known in the United States as the ''Asian Longhorrned beetle'', which has damaged many American forests, and is a threat which can unintentionally reach south American countries, including Brazil. This work presents a new method based on X-ray computerized tomography (CT) and image processing for beetle injury detection in forests. Its results show a set of images with correct identification of the location of beetles in living trees as well as damage evaluation with time.

scholarly journals Applications of nonlocal means algorithm in low-dose X-ray CT image processing and reconstruction: A review

2017 ◽  
Vol 44 (3) ◽  
pp. 1168-1185 ◽  
Author(s):  
Hao Zhang ◽  
Dong Zeng ◽  
Hua Zhang ◽  
Jing Wang ◽  
Zhengrong Liang ◽  
...  
Keyword(s):  
Image Processing ◽  
Low Dose ◽  
Ct Image ◽  
Nonlocal Means ◽  
X Ray

scholarly journals Locating the 'missing wedge' artifacts from limited-angle CT reconstruction

2018 ◽  
Vol 24 (S2) ◽  
pp. 140-141
Author(s):  
Jianhong Liu ◽  
Yong Guan ◽  
Liang Chen ◽  
Haobo Bai ◽  
Wenbin Wei ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Image Processing ◽  
Image Analysis ◽  
Processing Technique ◽  
Image Processing Technique ◽  
Ct Image ◽  
Ct Reconstruction ◽  
Reconstruction Algorithms ◽  
X Ray ◽  
Reconstruction Quality

Abstract:'Missing wedge' problem exists in some kind of CT imaging situations, such as electron microscopy, x-ray nano-CT image, etc. Method such as iterative reconstruction algorithms, total variation based method were applied to improve the reconstruction quality, but the 'missing wedge' artifacts are still inevitable. In this paper, a method based on image processing technique was proposed to locate the 'missing wedge' artifacts in CT reconstruction. The result showed good performance on locating the artifacts, which also showed the potential in CT reconstruction and image analysis in nano-CT.

Interactive multiple area spectrum integration (MASI)

1994 ◽  
Vol 52 ◽  
pp. 942-943
Author(s):  
John A. Hunt ◽  
Richard D. Leapman ◽  
David B. Williams
Keyword(s):  
Image Processing ◽  
Low Dose ◽  
Routine Analysis ◽  
Reference Image ◽  
Area Spectrum ◽  
List Type ◽  
Type Number ◽  
Image Processor ◽  
X Ray ◽  
Scanning Path

Interactive MASI involves controlling the raster of a STEM or SEM probe to areas predefined byan integration mask which is formed by image processing, drawing or selecting regions manually. EELS, x-ray, or other spectra are then acquired while the probe is scanning over the areas defined by the integration mask. The technique has several advantages: (1) Low-dose spectra can be acquired by averaging the dose over a great many similar features. (2) MASI can eliminate the risks of spatial under- or over-sampling of multiple, complicated, and irregularly shaped objects. (3) MASI is an extremely rapid and convenient way to record spectra for routine analysis. The technique is performed as follows:Acquire reference imageOptionally blank beam for beam-sensitive specimensUse image processor to select integration mask from reference imageCalculate scanning path for probeUnblank probe (if blanked)Correct for specimen drift since reference image acquisition

Image processing techniques used for dental x-ray image analysis

2008 ◽  
Author(s):  
Stefan Oprea ◽  
Costin Marinescu ◽  
Ioan Lita ◽  
Mariana Jurianu ◽  
Daniel Alexandru Visan ◽  
...  
Keyword(s):  
Image Processing ◽  
Image Analysis ◽  
X Ray ◽  
Image Processing Techniques ◽  
Processing Techniques
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