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AP chest x-rays are harder to read than PA x-rays and are therefore generally reserved for situations where it is difficult for the patient to get an ordinary chest x-ray, such as when the patient is bedridden. In this situation, mobile X-ray equipment is used to obtain a lying down chest x-ray (known as a "supine film").
A Reddit user shared a photo of an pregnant dog's X-ray and you can clearly see all her babies: Pregnant dog x-ray from pics The photo became incredibly popular, garnering thousands of comments.
Lead is the most common shield against X-rays because of its high density (11,340 kg/m 3), stopping power, ease of installation and low cost. The maximum range of a high-energy photon such as an X-ray in matter is infinite; at every point in the matter traversed by the photon, there is a probability of interaction.
For comparison, radiation dosage for other medical procedures range from 0.02 mSv for a chest X-ray and 6.5–8 mSv for a CT scan of the chest. [ 42 ] [ 43 ] Average civil aircrews are exposed to 3 mSv/year, [ 44 ] and the whole body occupational dose limit for nuclear energy workers in the US is 50 mSv/year. [ 45 ]
The cheapest dog breeds happen to be some of the cutest pups around. Which will you bring home? The post The 15 Cheapest Dog Breeds for Budget-Conscious Pet Lovers appeared first on Reader's Digest.
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In contrast, X-rays can penetrate a wider variety of objects (such as the human body), but they are invisible to the naked eye. To take advantage of the penetration for image-forming purposes, one must somehow convert the X-rays' intensity variations (which correspond to material contrast and thus image contrast) into a form that is visible.
While the chest x-ray is normal in the majority of PE cases, [2] the Westermark sign is seen in 2% of patients. [3] Essentially, this is a plain X-ray version of a filling defect as seen on computed tomography pulmonary arteriogram. The sign results from a combination of: the dilation of the pulmonary arteries proximal to the embolus and