how is bone edge detection done in bone densitometry?
440533
The most commonly used tool to diagnose low bone density is the DEXA (Dual Energy X- ray Absorptiometry) densitometer, a specialized x-ray device that precisely quantifies bone at the spine, femur and other skeletal sites. DEXA scans are non-invasive and considered comfortable for the patient, with very low radiation. The patient lies on the scanner bed while a small beam of radiation passes through the region of interest. Patient bone density is measured automatically. The entire examination for the spine and the femur requires about 10 minutes. \n\nFor more detailed information, you can go to Bone Densitometer's website... http://www.bonedensitometers.com/AboutBone/AboutBone.html
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Bone deterioration is a main factor and a bone density test should be performed periodically.\nTendancy to bruise easily.\nSorry, I forget the rest.  Hope this helps
818653
Try this website:\n\nhttp://www.theboneman.com/bonebuilding.html
334748
Typically labs have densitometers for gel electrophoresis analysis.  There has also been increasing use of capillary electrophoresis systems for IFE/s and SPE.
202857
Half-lives are part of the answer.\n\nIt is also used to compute the amount of energy absorbed by an exposure to radiation of this or that energy, of a given intensity for a given period of time.\n\nIt is used to construct the tables that tell the X-Ray technologist how to set up the machine (kV and mAs) to take chest films, hand X-rays, and whatever else: that's called Technique Charts.\n\nCT and MRI scanners use mathematical algorithms to generate the pictures they take--usually a version of Fisher & Tukey's fast factoring algorithm for 2 or 3 D reverse Fourier transform...  Yeah, right, that's a mouthful, and I hope I've got it clearly...\n\nThey used to use it to figure out how to move the X-ray emitter and the film to do plain old tomography, but on the whole, that's gone by the wayside since the advent of computerized tomography (CT)\n\nThere's probably more, but that's a good start.
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i use ImageAnalyzer. It is good software and free.\nhttp://meesoft.logicnet.dk\ni've been using it for 1 year and had no problems.\nit has loads of buttons and whistles, too.
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A tool to measure diameter of a round object.
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X-rays are transmitted through a subject onto a photographic film. The x-rays are blocked by bone and other solid objects casting a shadow onto the film.
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The detection of X-rays is based on various methods. The most commonly known method are a photographic plate, or cassette, and rare earth screens.\n\nThe X-ray photographic plate is frequently used in hospitals to produce images of the internal organs and bones of a patient. The part of the patient to be X-rayed is placed between the X-ray source and the photographic plate to produce what is a shadow of all the internal structure of that particular part of the body being X-rayed. The X-rays are blocked by dense tissues such as bone and pass through soft tissues. Where the X-rays strike the photographic plate it turns black when it is developed. So where the X-rays go through "soft" parts of the body like organs and skin the plate turns black. Contrast compounds containing barium or iodine can be injected in the artery of a particular organ. The contrast compounds strongly block the X-rays and hence the circulation of the organ can be more readily seen.\n\nAnother method of detecting X-rays is a fluorescent plate. In modern hospitals a special plastic sheet is used in place of the photographic plate. The plastic sheet is read by a scanning laser beam. The resultant image is then stored in a computer. The plastic sheet can be used over and over again.
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http://www.bio.psu.edu/people/faculty/strauss/anatomy/skel/skeletal.htm
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E=h*f \nc=f*lambda\nf=c/lambda\n\nf(Xray)=(2.9979*10^8)/(5.3*10^-10)=5.656*10^17 [Hz]\nf(visible)=(2.9979*10^8)/(5.3*10^-9)=5.656*10^16 [Hz]\n\nE(Xray)=6.626*10^-34*5.656*10^17=3.747*10^-16 [J]\nE(visible)=6.626*10^-34*5.656*10^16=3.747*10^-17 [J]\n\nSo the visible light is 10 times weaker than the xray.
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osteology-study of bones
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Bone is composed of proteins (including mucoproteins) and inorganic material; minerals.\n\nBoth are being added to, and removed, as we go on living.\n\nIn some circumstances, there is not enough of the inorganic minerals present.  The protein scaffolding is not well filled - in with calcium and magnesium salts.  Under Xrays, the bones will be less dense; the Xrays pass through the protein scaffolding as they pass through the protein of skin and muscle, etc.  The more minerals in the bone, the more the bone blocks Xrays.\n\n(I had a bone densitometry done, last week.)
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Yes, you can make out the silhouette of your penis and gonads on certain radiographic views, this is due to the difference in densities between the air and your genitalia.
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I would use a quadrat system to assess the diseased area of anything. Exactly how you might do that would depend on the degree of accuracy you need and the time you have.\n\nyou could adapt the method to suit your needs, either using photographs with grids printed or maybe if you want to be more accrate, peeling the skins to spread them out and projecting a grid onto them?
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bone files can be helpful in reducing and contoring the bones after extraction
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Osteoporosis is a disease of bone in which the bone mineral density (BMD) is reduced, bone microarchitecture is disrupted, and the amount and variety of non-collagenous proteins in bone is altered. Osteoporotic bones are more susceptible to fracture. Osteoporosis is defined by the World Health Organization (WHO) as either a bone mineral density 2.5 standard deviations below peak bone mass (20-year-old sex-matched healthy person average) as measured by DXA, or any fragility fracture. While treatment modalities are becoming available (such as the bisphosphonates), prevention is still considered the most important way to reduce fracture. Due to its hormonal component, more women, particularly after menopause, suffer from osteoporosis than men. In addition it may be caused by various hormonal conditions, smoking and medications (specifically glucocorticoids).\n\nclick here:http://en.wikipedia.org/wiki/Osteoporosis#Signs_and_symptoms