Articles tagged with Tomography
Scientists used a new technique to create a 3D map of stainless steel's grain structure, revealing how cracks grow between grains. The study provides insights into crack growth mechanisms and could lead to more efficient and safer materials.
Coronary computed tomography angiography (CTA) may be misused as a screening tool for high-risk patients without symptoms. Experts, including Dr. Christopher M. Kramer, argue that the procedure exposes patients to radiation and contrast dye, posing more risk than benefit.
Scientists study fluid structures in moist sand using x-ray microtomography and find that the fluid and grains coexist in a filigree structure. This discovery explains the universal stiffness of wet granules, relevant to various industries such as pharmaceuticals and food production.
Multicenter trials show CT angiography highly accurate in detecting coronary artery disease with sensitivity of 85% and specificity of 90%. The noninvasive exam was equal in accuracy to invasive angiography in identifying patients to be referred for angioplasty or bypass surgery.
A brain scanning experiment found that when colleagues earn less, participants show stronger activation in the brain's reward centre. Traditional economic theory suggests that only absolute size of rewards matters, but this study reveals relative earnings play a major role in motivation.
Dr. Worcester is recognized for his pioneering work on acoustical oceanography and tomographic inverse methods, as well as his tireless efforts to develop responsible permitting structures for scientific sound use. He is the eighth recipient of the Munk Award, a testament to his groundbreaking research and leadership in the field.
Dr. Peter Worcester is being recognized for his contributions to acoustical oceanography, tomographic inverse methods, and leadership in the US ocean acoustics community. He has led numerous experimental programs to develop and use tomography, including notable experiments north of Hawaii and in the Greenland Sea.
The NUGGET instrument could help scientists determine if primitive forms of life existed on Mars by analyzing fossils embedded in rocks. By generating three-dimensional images, it can quickly identify areas where samples might be taken for further study.
Researchers identified ancient charophyte algae fossils with complex evolution, including vertical and spiral structures. The study sheds light on the Paleozoic era's climate and provides a non-destructive method for investigating small fossils.
Multislice computed tomography (MSCT) scanning shows high accuracy in detecting significant lesions and coronary calcifications compared to invasive coronary angiography. MSCT may reduce the likelihood of clinically important CAD in patients with suspected disease, but its use requires proper patient selection and adequate training.
The new Local-Electrode Atom-Probe (LEAP) tomograph allows researchers to study the nanostructure and chemical composition of materials at an unprecedented level. By analyzing the structure and chemical identity of steel, scientists can design stronger materials with improved properties.
A study comparing the relative sensitivity of colonoscopy, ACBE, and CTC found that colonoscopy detected 98% of large and 99% of small lesions, outperforming ACBE and CTC. The results have important implications for clinicians considering colon imaging tests and potentially for colon cancer screening programs.
A study using triple-contrast CT found that it can accurately detect peritoneal damage and injury extent in patients with penetrating torso trauma. The imaging modality achieved an overall accuracy rate of 98 percent, surpassing previous limitations of CT scans for retroperitoneum assessment.
A study published in JAMA found that computed tomographic colonography (CTC) had lower sensitivity rates compared to conventional colonoscopy for detecting colorectal tumors, raising concerns about its readiness for widespread clinical use.