exposure

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exposure

 [eks-po´zhur]
1. the act of laying open, as surgical exposure.
2. the condition of being subjected to something, as to infectious agents or extremes of weather or radiation, which may have a harmful effect.
3. in radiology, a measure of the amount of ionizing radiation at the surface of the irradiated object, such as a person's body; calculated by multiplying milliamperage times exposure time in seconds, expressed in units of milliampere seconds (mAs). See also x-rays.
x-ray exposure see exposure (def. 3).

ex·po·sure

(eks-pō'zhūr),
1. A condition of displaying, revealing, exhibiting, or making accessible.
2. In dentistry, loss of hard tooth structure covering the dental pulp due to caries, dental instrumentation, or trauma.
3. Proximity or contact with a source of a disease agent in such a manner that effective transmission of the agent or harmful effects of the agent may occur.
4. The amount of a factor to which a group or individual was exposed; in contrast to the dosage, the amount that enters or interacts with the organism.
Epidemiology A state of contact or close proximity to a chemical, pathogen, radioisotope or other other substance by ingesting, breathing, or direct contact—e.g., on skin or eyes; exposure may be short term—acute—or long term—chronic

Imaging An image, such as an anteroposterior exposure of the chest
Medical liability The degree of malpractice risk borne by a health care provider while performing a particular medical service
Nuclear physics The amount of ionising radiation in air from X-rays or gamma rays at a specific point in space, defined as the total charge of ions divided by the mass that would completely stop the radiation; the SI unit for exposure is coulomb per kg—C/kg; in human terms, exposure refers to the amount of ionizing radiation to which a person has been subjected

exposure

Epidemiology A state of contact or close proximity to a chemical, pathogen, radioisotope or other other substance by swallowing, breathing, or direct contact–eg, on skin or eyes; exposure may be short term–acute or long term–chronic. See Acute exposure, Athlete exposure, Chronic exposure, Intermediate exposure, Occupational exposure to bloodborne pathogens, Perinatal substance exposure Imaging An image, as an AP exposure of the chest Medical liability A general term for the degree of malpractice risk borne by a health care provider while performing a particular medical service See Risk management.

ex·po·sure

(eks-pō'zhŭr)
1. Contact of a compound with an epithelial barrier such as the skin, eyes, respiratory tract, or gastrointestinal tract before absorption occurs.
See also: exposed dose, external dose
2. Physical effects caused by harsh weather.
3. Placing an object or person in a given environmental state.

exposure

  1. the aspect of a particular location with respect to the points of the compass, for example, some garden plants, such as the peach tree in England, prefer a southern exposure.
  2. a rock outcrop.
  3. a soil section.

ex·po·sure

(eks-pō'zhŭr)
1. In dentistry, loss of hard tooth structure covering the dental pulp due to caries, dental instrumentation, or trauma.
2. A condition of displaying, revealing, exhibiting, or making accessible.
3. Proximity to contact with a source of a disease agent in such a manner that effective transmission of the agent or harmful effects of the agent may occur.

Patient discussion about exposure

Q. I feel some effects due to less exposure to sunlight. I heard that UV lighting is effective for depression. I’m living in northwest pacific; the summers are very nice but way to short. I feel some effects due to less exposure to sunlight. I have been told that sun light helps the production of the chemical in the brain that we are deficient of. If true, are there certain types of fixtures and/or bulbs that I should try.

A. Its also called seasonal affective disorder:
http://medical-dictionary.thefreedictionary.com/disorder

(SAD) depression with fatigue, lethargy, oversleeping, overeating, and carbohydrate craving recurring cyclically during specific seasons, most commonly the winter months.

I would about UV. Perhaps you should get a fluorescent light fixture for the area where you spend the most time each day and turn it on.

The web sites that sell the commercial light boxes want several hundred dollars or even more. (Seems like rip off to me.)
The web page at
http://www.ncpamd.com/seasonal.htm

says "studies suggest that regular fluorescent lights will work as well. UV (ultraviolet) light can damage eyes and skin, so it must be filtered out. It is best to buy a commercially built light box to be sure of the exact amount of light and to be sure that there are no isolated "hot spots" which could damage eyes. Many people still prefer full spectrum (minus UV) light because it i

Q. how do i keep my baby as minimal as passable exposed to the out side world threats? like decease and other things

A. It might seem like a caring attitude, but I'm not sure it's neither possible nor absolutely necessary - babies do get sick, usually only mildly and transiently, so trying to prevent all the cases of fever would be quite impossible.

What you can do, is to maintain the regular infant welfare visits, give him or her the necessary vaccinations (one of the most important things you can do for your child), make sure your baby eats well, regarding both the amount and type of foods, and generally keep a good hygiene: make sure to wash hands after you go to the toilet and before you handle your baby, don't expose him or her to other sick infants etc.

However, all this is just a general advice - if you have specific question you may want to consult your doctor (e.g. a pediatrician).

Take care,

More discussions about exposure
References in periodicals archive ?
With [[delta].sub.spatial] near zero for the regional pollutants (the median absolute value of [[DELTA].sub.spatial] across ZIP codes was < 0.12, indicating similar magnitude for CS measurements and AQ estimates), their total exposure error ([delta].sub.total]) consisted mostly of exposure error due to human exposure factors ([[delta].sub.population]), indicating greater differences in magnitude for AQ estimates relative to PE estimates.
Exposure factors such as kV, mAs and SID used for pelvic x-ray examinations with CR and FS systems were obtained either directly from exposure charts or from technologists, in the absence of exposure charts.
Because patient radiation dose is not a consideration, repeat radiographs provide opportunities for immediate faculty interactions regarding exposure factor selection, distance used, spatial relationships related to tube angulation, distortion, attenuation, screen selection and pathology.
For participants without a reported body weight, we multiplied the recommended volume of distribution per weight by median age- and sex-specific body weights recommended from the Exposure Factors Handbook (U.S.
Within the past decade, many hospitals have installed CR systems to correct inconsistent image quality resulting from errors in exposure factors during portable exams.[3,4] CR corrects the unfavorable effects of over- or underexposure through its wide exposure latitude and its ability to collect a wide range of diagnostic information.[5] CR can enhance the visibility of lung tissue and superimposed structures, such as the heart, mediastinum and the upper abdomen.[5,6] CR also increases the visibility of tubes, lines, catheters and pacemakers, as well as pneumothoraces and interstitial lung disease.[5,6]
The distributions of DDT concentrations in exposure media were then multiplied by exposure factors such as inhalation rates and food consumption rates, which yielded distributions of DDT uptake via each individual pathway.
Although references to the radiographic exposure factors were not noted in these early studies, in 1967 Gray[4] provided the technical data from his extensive examination of mummies in museums in Great Britain and other European countries.
As demonstrated in the U.S EPA Exposure Factors Handbook (U.S.
There are evaluation forms to note the performance of both the student performing the exam and the student setting the exposure factors. At the end of the the chapter, the author provides insightful answers and recommendations on correct positioning, accurate measuring, what to know about the patient to set optimum techniques (eg, whether the patient is a smoker when radiographing chest and ribs), correctly marking a film, placement of markers and when to use a grid.
This simple definition masks the fact that a quantitative exposure analysis requires collection and analysis of multiple parameters such as concentration and duration of exposure as well as exposure factors that affect contact rates and, therefore, determine the magnitude of exposure.
If the collimation is made smaller, however, then exposure factors have to be increased (thus increasing dose) to maintain the same signal-to-noise on the film because scatter production is reduced.
Nevertheless, biomonitoring is subject to toxicokinetic and exposure scenario uncertainties that may limit their use for dose estimation, assessment of exposure factors, and identification of routes of exposure.