Using both at the same energy improved temporal resolution, best used in cardiac imaging. When used at different kilovoltages resulted in material differentiation (Vlahos 2007).
This dual-energy scanner, based on different attenuations and different photon energies will likely be used for pulmonary arterial angiographic and aortic imaging with, potentially, lower contrast volume. It will also likely be used for pulmonary enhancement maps and may possibly eliminate precontrast imaging and reduce radiation exposure (Vlahos 2007).
Utilizing the distinguishing qualities of attenuation, consistency or homogeneity, number and size of tumors found in Positron Emission Tomography (PET) scans of lungs and thyroid, pancreas, kidneys, adrenals, liver, and ovaries can be evaluated with training.
Fitton, Steenbakkers, et al. worked on a study of the lymph nodes of 13 patients found to have lung cancer. The data was obtained under free breathing conditions, a protocol was determined for CT/PET registration and a comparison of the image quality of attenuation-corrected PET images using CT images and positron transmission images "in terms of signal-to-noise ratio (SNR) and lesion-to-background ratio (contrast)" (Fitton 42)
This study found large differences in the attenuation-corrected images using CT and the attenuation-corrected images which used positron transmission, using manual and automatic CT/PET registration and small rotations of less than 1.0 degrees. The CT scans had a mean contrast of 16% for lymph nodes. The study found "attenuation correction based on CT provides a better image quality for GTV delineation than when using positron transmission for attenuation correction" (Fitton 48).
In conclusion, attenuation used in ultrasound scans used today can help determine to a higher degree,...
Mindfulness Meditation Training on Experimentally Induced Pain" by Zeidan et al., (2010), published in the Journal of Pain, presents the results of research to investigate The research addresses a gap in the research examining the benefit of meditation in attenuating pain symptoms. The research problem is clearly articulated, with the title clearly stating the content of the paper and the introduction expressing and justifying the issue. Past research has demonstrated
If there is an aggregate sub-base, these can provide water quality treatment. There should be good compaction and appropriate geo-textiles especially for areas accessible to heavy vehicles. Permeable pavements reduce the need for deep excavations thereby providing a cost benefit. This system reduces the run-off rates and peak flow. The overall benefit is that it removes pollutants and holds water so that it does enter the main drainage. A lot
As compared to the previous years, the antennas in the earth stations are no longer large in size because of enhancements in satellites. A satellite communication basically functions and works in millimeter and microwave wave frequency bands that are estimated to range from approximately 1 Ghz to 50 Ghz. While there are different frequency bands that are used by satellite communication systems, the most common are the uplink and downlink
When using open reduction of dorsal displaced fractures of the radius to restore congruency and extra-articular anatomy, the authors recommended the use of their double-plating method. This method is reliable in providing stable internal fixation and in allowing early function. It is, however, and as earlier mentioned, a demanding technique, as ot requires careful; attention to detail. Carter, P.B. And PR Stuart. The Sauva-Kapankji Procedure for Post-Traumatic Disorders of the
Hearing loss is very case specific because one person who has hearing loss or impairment may be able to hear certain sounds or be completely deaf. Impairment entails something is not working as well as it should but there may still be some basic functioning. Hearing loss can go by many terms such as deaf, deafness, or hard of hearing. All could be one and the same situation but as
Treatment Options Solid Waste is generally described as: • Trash (for instance dairy boxes and even coffee grounds) • Reject (for instance metallic scrap, wall panel, and even empty storage containers) • Sludges coming from waste materials treatment facilities, drinking water supply clarification facilities, or air pollution control establishments (for instance scrubber slags) • Manufacturing waste products (for instance manufacturing process contaminated waters and non-waste-water sludges as well as solids) • Other dumped supplies, such
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