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mA setting is higher, the kVp setting is higher, and the atomic number making up the
imaged structure is lower.
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Why is it that sometimes when bones are x rayed they appear as white images?
Bones always appear as white images in regular xrays. However they arent really white because the film is clear, the plastic on the view box is white. But on xray film it is coated with a metalic layer. The xrays make the metalic layer stick to the film. So the black part of the film is where all the xrays reach the film. If the area on the xray is gray, then that means that some of the xrays are getting through implying that the structure is more dense than the black part. Soft tissue appears gray. The bone is a very dense structure allowing minimal to no xrays getting through. The film is then put through the processor and the film runs through chemicals that make the picture "stay" on the film. It is then rinsed and dried. Since the xrays make the metalic layer stick, none stick to the area of the bone because no radiation got through and the layer was washed off during processing. This is why bones appear white, they are the densest structure.
Shutter speed can be used to?
How many amount of light are reaching in the film.
What is the duration of Higher Ground film?
The duration of Higher Ground - film - is 1.9 hours.
How do x rays see through things?
Xrays pass through most substinces. Various detectors can be used to detect the ammount of xrays that are sent from one side verses what is picked up on the other side. The difference can give you information about an object. Xray radiation is created when high speed electrons hit a solid object. Basically high voltage electricity (usually 40,000 - 120,00 volts) is pushed across a gap from a cathode to an anode. The Anode is usually made of tungsten or other materials that can withstand high temperatures. The anode is usually spinning so that the target is not hit in the same spot over and over again, this allows the anode to last longer. When the high voltage hits the target it releases xray radiation. Xray radiation is invisible, but it causes some elements to glow. The best used today are rare earth elements like yttrium and gadolinium. The xrays travel through the patient's body and hit a film cassette that is treated with some of these rare earth elements and it glows wherever the xrays reach it. Some of your body blocks the xrays so the screen only glows in areas that is not entirely blocked. The thicker and more dense the body part the more xrays are blocked. Bone is very dense so it blocks more xrays than most any other tissue, so bones show up as clear areas on the film. The film is placed between these screens inside the cassette safe from regular light. So that the only light that reaches this film is the light created by the glowing elements bombarded by xray radiation. The glowing of the elements bombarded by xrays causes the film to turn black and or grey depending on the amount of xrays that are blocked. Modern xray machines have cassettes that use different phosphorus materials that keep a temporary image on the cassette then the cassette is read by a machine and creates a digital image. There is no film in these type of cassettes. This is done because more and more facilities are not using film anymore. Storing xrays is cheaper and more efficient on computer hard drives as digital xrays. Because of the digital storage of xrays some xray machines do not use cassettes at all, only digital readers.
If X-ray film is to dark what should you do?
If the film is too dark, the xray needs to be retaken with lower kV and mAS settings. Xrays that are only marginally too dark can be looked at under a bright light.
Why is it that sometimes when bones are x-rayed they appear as white images?
Bones always appear as white images in regular xrays. However they arent really white because the film is clear, the plastic on the view box is white. But on xray film it is coated with a metalic layer. The xrays make the metalic layer stick to the film. So the black part of the film is where all the xrays reach the film. If the area on the xray is gray, then that means that some of the xrays are getting through implying that the structure is more dense than the black part. Soft tissue appears gray. The bone is a very dense structure allowing minimal to no xrays getting through. The film is then put through the processor and the film runs through chemicals that make the picture "stay" on the film. It is then rinsed and dried. Since the xrays make the metalic layer stick, none stick to the area of the bone because no radiation got through and the layer was washed off during processing. This is why bones appear white, they are the densest structure.
When was Higher Ground - film - created?
Higher Ground - film - was created on 2011-08-26.
Sensitivity of film emulsion is indicated by?
It used to be the ASA rating, but now its the ISO rating, the higher the number, the more sensitive the film is. e.g. 100 for daylight 400 for nightlight as an example.
What does it mean when film for photographs are 200 or 400 or 800?
The numbers refer to film speed or ISO; witch is another way of saying sensitivity. Each of the standard ISOs (listed bellow) is twice as sensitive as the one before it. The higher the number is the more sensitive the film. While a higher sensitivity film will allow you to shoot in lower light conditions it increases the appearance of grain. Not sensitive
What makes x-ray machine show the bones?
Xrays are high energy waves that can penetrate soft tissue, like organs and skin, but not bones and teeth. Therefore, when you stand in the xray machine, the film is exposed to xrays only where they can pass through the body. Hence, you get pictures of bones and teeth but not organs and skin.
When was To Be Number One - film - created?
To Be Number One - film - was created in 1991.
What are the release dates for Always Reaching - 2009?
Always Reaching - 2009 was released on: USA: 28 April 2009 (Hollywood East Film Festival) USA: 3 December 2010 (DVD premiere)
