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Imaging technology

About: Imaging technology is a research topic. Over the lifetime, 1450 publications have been published within this topic receiving 26186 citations.


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Journal ArticleDOI
TL;DR: The objective of this research is to test a hybrid gigapixel photogrammetry method, and investigate optimal equipment configurations for use in mountainous terrain, and to benefit natural hazard mapping programs in which rockfall potential must be recorded and the use of standard 3-dimensional imaging techniques cannot be applied.
Abstract: The use of terrestrial remote imaging techniques, specifically LiDAR (Light Detection And Ranging) and digital stereo-photogrammetry, are widely proven and accepted for the mapping of geological structure and monitoring of mass movements. The use of such technologies can be limited, however: LiDAR generally by the cost of acquisition, and stereo-photogrammetry by the tradeoff between possible resolution within the scene versus the spatial extent of the coverage. The objective of this research is to test a hybrid gigapixel photogrammetry method, and investigate optimal equipment configurations for use in mountainous terrain. The scope of the work included field testing at variable ranges, angles, resolutions, and in variable geological and climatologically settings. Original field work was carried out in Canada to test various lenses and cameras, and detailed field mapping excursions were conducted in Norway. The key findings of the research are example data generated by gigapixel photogrammetry, a detailed discussion on optimal photography equipment for gigapixel imaging, and implementations of the imaging possibilities for rockfall mapping. This paper represents a discussion about a new terrestrial 3-dimensional imaging technique. The findings of this research will directly benefit natural hazard mapping programs in which rockfall potential must be recorded and the use of standard 3-dimensional imaging techniques cannot be applied.

23 citations

Journal ArticleDOI
TL;DR: Fluorescence molecular imaging is an easy-to-use imaging tool that can be implemented for intraoperative cancer surgery to delineate tumor margins and near-infrared fluorescence is useful for image-guided cancer surgery.
Abstract: Despite advances in diagnostic and therapeutic technology of human diseases, cancer remains among the leading causes of morbidity and mortality worldwide. The development of molecular imaging has made it possible to diagnose and treat cancer at early stages, which increases the likelihood of survival. Nuclear medicine has played a key role in diagnosis and staging of human malignancy. However, most imaging technology can only be used in the preoperative diagnosis stage, and these methods are time consuming and often expose patients to a high amount of radiation. Combined with appropriate contrast agents, fluorescence molecular imaging is an easy-to-use imaging tool that can be implemented for intraoperative cancer surgery to delineate tumor margins. In particular, near-infrared fluorescence is useful for image-guided cancer surgery because of the relatively high tissue penetration, low tissue absorption and scattering, and reduced autofluorescence. In this review, the basic principles of fluoresce...

23 citations

Book ChapterDOI
01 Oct 2006
TL;DR: A novel system for automated calibration that is optimized for the OR usage with real-time feedback and control of the calibration accuracy is proposed and a novel N-wire phantom is designed with greatly reduced complexity to facilitate mass production without compromising the accuracy and robustness.
Abstract: 3D ultrasound (US) is an emerging new imaging technology that appeals to more and more applications in intraoperative guidance of computer-assisted surgery. In a freehand US imaging system, US probe calibration is typically required to construct a 3D image of the patient’s anatomy from a set of 2D US images. Most of the current calibration techniques concern primarily with the precision and accuracy. However, for computer-assisted surgeries that may require a calibration task inside the operating room (OR), many other important aspects have to be considered besides accuracy. In this paper, we propose a novel system for automated calibration that is optimized for the OR usage with real-time feedback and control of the calibration accuracy. We have also designed a novel N-wire phantom, with greatly reduced complexity to facilitate mass production without compromising the accuracy and robustness.

23 citations

Journal ArticleDOI
TL;DR: This new three‐dimensional (3D) imaging technology showed very little intraoperator and interoperator variation for repeated measurements of a model of known area by each of two operators, and was superior to traditional ruler measurements for assessing SPT reactions to histamine and allergen.
Abstract: Skin-prick tests (SPTs) are a standard way to test for sensitizations to allergens, but to date, techniques that allow for high-quality measurements of the resulting weals for research purposes are lacking. In this study, we assessed a new three-dimensional (3D) imaging technology for its accuracy and consistency. We found that this new technology showed very little intraoperator and interoperator variation for repeated measurements of a model of known area by each of two operators. We also found that repeated measurements of the same object over 4 months showed virtually no variation. Finally, 3D imaging was superior to traditional ruler measurements for assessing SPT reactions to histamine and allergen. For high-quality measurements of SPT reactions, 3D imaging is accurate, consistent and reliable.

23 citations

Journal ArticleDOI
TL;DR: An improvement in IVPA/IVUS imaging speed to 100 frames per second is reported, demonstrated in rabbit in vivo, visualizing the nanoparticles accumulated on abdominal aorta wall at the wavelength of 1064 nm, in real time display and offers a stable, efficient and easy-to-use tool for instantaneous disease visualization and disease diagnosis.
Abstract: Intravascular photoacoustic (IVPA) imaging technology enables the visualization of pathological characteristics (such as inflammation activities, lipid deposition) of the artery wall. Blood flushing is a necessary step in improving the imaging quality in in vivo IVPA imaging. But the limited imaging speed of the systems stretches their flushing time, which is an important obstacle of their clinical translations. In this paper, we report an improvement in IVPA/IVUS imaging speed to 100 frames per second. The high-speed imaging is demonstrated in rabbit in vivo, visualizing the nanoparticles accumulated on abdominal aorta wall at the wavelength of 1064 nm, in real time display. Blood flushing in vivo improves the IVPA signal-noise-ratio by around 3.5 dB. This study offers a stable, efficient and easy-to-use tool for instantaneous disease visualization and disease diagnosis in research and forwards IVPA/IVUS imaging technology towards clinical translations.

23 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202312
202224
202190
202091
201984
201879