Radiographical Imaging

We present in this paper an invariant pattern recognition method, applied to radiographic images of welded joints for the extraction of feature vectors of the weld defects and their classification so that they will be recognized automatically by the inspection system. 

An invariant pattern recognition method, based on the Hartley transform, and applied to radiographic images, containing different types of weld defects, is presented. Practical results show that this method is capable to describe weld flaws into a small feature vectors, allowing their recognition automatically by the inspection system we are realizing. 

Figure 3 A radiographic image of a welded joint (defect lack of penetration), a Original image, b Edge image (only the defect is maintained).

Digital radiographic image storage and retrieval , NDE Center, EPRI TR-104626, august 1995... 

Radiographic image of 800 mm thick reinforced concrete wall with vertical and horizontal bars clearly visible, in this case some 150 mm from the concrete surface (film side). 

Boron tribromide [10294-33A], BBr, is used in the manufacture of diborane and in the production of ultra high purity boron (see Boron, ELEMENTAL BoRON COMPOUNDS). Anhydrous aluminum bromide [7727-15-3], AIBr., is used as an acid catalyst in organic syntheses where it is more reactive and more soluble in organic solvents than AlCl. Tballium bromide [7789AOA], TlBr, is claimed as a component in radiographic image conversion panels (39). 

Computed tomography Radiographic imaging of anatomic information from a cross-sectional plane of the body. 

Boden SD (1996) The use of radiographic imaging studies in the evaluation of patients who have degenerative disorders of the lumbar spine. J Bone Joint Surg Am 78(1 ) 114-124... 

U Neitzel, J Kosanetzky and G Harding (1985) Coherent scatter in radiographic imaging a Monte Carlo simulation study. Phys. Med. Biol. 30, 1289-1296. 

Neutron Radiography.47 A neutron beam is directed on the test sample and the resulting attenuated beam falls on a conversion screen and a radiographic image is obtained. The neutrons of different energies are classified as ... 

The neutron beam impinges on the sample and the attenuated neutron beam falls on a film, together with a conversion screen. The secondary radiation exposes the film, resulting in a radiographic image of the test sample. 

Radiographic imaging studies may include chest x-ray, bone scan, chest and abdominal computed tomography scans, positron emission tomography, ultrasonography, and magnetic resonance imaging. 

Furuse, J., Maru, Y., Yoshino, M., Mera, K., Suml, H., Seklgnchl, R., Sataka, M., Hasebe, T., Ochlal, A. Assessment of arterial tumor vascularity in small hepatocellular carcinoma. Comparison between color Doppler ultrasonography and radiographic imagings with contrast medium dynamic CT, angiography, and CT hepatic arteriography. Eur. J. Radiol. 2000 36 20-27... 

Standard methods-. ASTM D 2663, ISO 8780, ISO 8781, ISO 11420, ISO 13549 Major results. Figure 14.6 compares results of radiographic imaging with the ashing method. The data indicate that the method offers precise results. ... 

Additional diagnostic steps that can be taken include sigmoidoscopy or colonoscopy examination of the stool for occult blood and ova and parasites complete blood cell count erythrocyte sedimentation rate and serum electrolytes. In some cases, radiographic imaging studies, such as computed tomography scans or barium swallows or enemas, may also be necessary if the findings of the above assessment are not typical for IBS. ... 

Radiographic imaging studies evaluate the extent of disease involvement. A chest x-ray should be performed to rule out the presence of metastatic spread to the lungs. A CT scan of the abdomen and pelvis is often performed to evaluate hepatic and retroperitoneal involvement and occult abdominal and pelvic disease, and to determine the depth of tumor penetration into the bowel wall and/or invasion to adjacent organs. Detection of lymph node involvement with either smdy is limited by the difficulty of distinguishing inflammatory or reactive lymph nodes from those infiltrated with tumor. Because CT scans may not adequately detect peritoneal seeding, small distant lymph node metastasis, or liver metastasis in colon cancer, an occasional patient may... 

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