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更新日期：2019-06-24
檔案大小：29M
目前版本：1.0
版本需求：Android 4.1 以上版本
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What is CT Scanning of the Head?
Computed tomography, more commonly known as a CT or CAT scan, is a diagnostic medical test that, like traditional x-rays, produces multiple images or pictures of the inside of the body.
The cross-sectional images generated during a CT scan can be reformatted in multiple planes, and can even generate three-dimensional images. These images can be viewed on a computer monitor, printed on film or by a 3D printer, or transferred to a CD or DVD.
CT images of internal organs, bones, soft tissue and blood vessels provide greater detail than traditional x-rays, particularly of soft tissues and blood vessels.
Computed tomography (CT) scanning of the head uses a series of x-rays of the head taken from many different directions; the resulting data is transformed into a series of cross sections of the brain using a computer program.
The CT head scan is one of the most common imaging studies that you can be faced with and the most frequently requested by A&E. This app will cover some of the underlying principles of CT head studies, and discuss a method for their interpretation.
Underlying principles and terminology
Computed tomography (CT) scanning involves the use of x-rays to take cross-sectional images of the body. This is possible as different tissues interact with X-rays in different ways. Some tissues will allow the passage of these X-rays without influencing it much, whilst other tissues will exert a more significant effect. The extent to which a material can be penetrated by an x-ray beam is described in terms of an attenuation coefficient which assesses how much a beam is weakened by passing through a voxel of tissue (voxel = volumetric pixel).
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