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Free Imaging Essays and Papers

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    Digital Imaging

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    Digital Imaging Digital imaging inevitably undermines photography’s status as an essentially truthful medium. Discuss. Until recently, at least, it was possible to define photography as a process involving optics, light sensitive material and the chemical processing of this material to produce prints or slides. Today though, that definition is subject to change. Technological innovations…are shifting photography from its original chemical basis towards electronics… It is not overstating it

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    Singh, Hanumant; Adams, Jonathan; Mindell, David; and Foley, Brendan 2000 Imaging Underwater for Archaeology. Journal of Field Archaeology volume 27 number 3: 319-328. The article by the various authors listed above concentrated on the various techniques that are used to locate and then to excavate these sites. They list and discuss the various techniques that they use. These vary from side-scanning to locate the sites to high resolution video to see how the site appears and the various locations

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    Problems with Digital Imaging

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    Problems with Digital Imaging “A picture is worth a thousand words”, Barnard, 1921. A critical use of images is for communications[1]. Images convey details and illustrate a specific scene in ways words could never do. People navigate the world primarily through sight, we can garner a great deal of information from just a glance. For hundreds of years, man made images, images created for a purpose to either illustrate a scene or capture a moment were done in the forms of paintings. These

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    The Science Behind Medical Imaging

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    undergone many accomplishments. Nowadays there are many opportunities to receive information about human bodies, with that being said, medical imaging has created a more efficient practice. Over time, a variety of different medical imaging have been developed, however each have their own disadvantages and advantages. The ultrasound is a medical imaging application. Ultrasounds use high-frequency sound waves. From there, the ultrasound machine creates images from the sound waves. The sound waves

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    Magnetic Resonance Imaging

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    Magnetic Resonance Imaging Magnetic resonance imaging has the potential of totally replacing computed tomography. If history was rewritten, and CT invented after MRI, nobody would bother to pursue CT. --Philip Drew (Mattson and Simon, 1996) WHAT IT IS Magnetic Resonance Imaging, or commonly known as MRI, is a technique used in medicine for producing images of tissues inside the body. It is an important diagnostic tool because it enables physicians to identify abnormal tissue without opening

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    Magnetic Resonance Imaging

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    Resonance Imaging MRI is a procedure, in wide use since the 80s, to see the anatomy of the internal organs of the body. It is based on the phenomenon of nuclear magnetic resonance (NMR), first described in landmark papers over fifty years ago (Rabi et al. 1938; Rabi, Millman, and Kusch 1939; Purcell et al. 1945; Bloch, Hansen, and Packard 1946) (4 ). . The MRI is a valuable diagnostic and research tool with also practical applications for surgical planning and conquering diseases. This imaging procedure

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    Radiation can be used in both diagnosis and therapeutic manners. The radiation emitted from radioisotopes can destroy tissue and in the therapeutic use: the destruction of cancerous and other dangerous tissues. And with diagnosis the gamma particle pass through the body tissues with minimal damage to a gamma camera. To evaluate the effectiveness of PET, SPECT, MRI and X-rays, we first need some basic knowledge on how each of them work. PET stands for positron emission tomography and works by an

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    The Faces Behind the Discovery of Magnetic Resonance Imaging Isidor Isaac Rabi He won the 1944 Nobel Prize in Physics for his "resonance method for recording the magnetic properties of atomic nuclei." He was the one to discover that protons have magnetic moments and that they precess around an external magnetic field. His experiments (on nuclei) revealed the jump between energy states of the proton when resonated with radio frequency waves. Felix Bloch & Edward Purcell Both

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    Ultrasound imaging, also known as sonography, is a kind of medical procedure that is aimed at viewing different organs inside the body by using sound waves. To do this, a probe and the ultrasound gel are used. The gel is first applied on the body then the probe placed on the body. This is followed by the transmission of high-frequency sound waves through the gel onto the body. If any of these high-frequency sound waves is reflected back, the probe collects them. Whatever is collected by the probe

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    Comparative Diagnostic Imaging

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    Service for the diagnosis, treatment and follow-up of abdominal aortic aneurysms (AAA). It shall discuss the current AAA screening programme being implemented across the United Kingdom to include the use of Ultrasound and Computed Tomography (CT) as imaging modalities in the demonstration of AAAs. Both the advantages and disadvantages of the modalities used during the diagnosis and treatment of AAA will be shown. Irwin and Rippe (2007, p382) define an aneurysm as; “a segment of the aortic lumen whose

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