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In Latin you have to go to find the etymological origin of the term contrast. Specifically, we can determine that this word comes from the sum of two distinct parts: the prefix with-, which can be translated as “together”, and the verb stare, which is equivalent to "standing up".

Contrast is the action and contrast effect (show opposite conditions or marked differences, check the accuracy of something). The contrast, therefore, may be the opposition or opposition that exists between things or people .

For example: "The press detected a marked contrast in the attitudes of both candidates", "It was impossible not to notice the contrast between Dr. Castro's polished shoes and his son's worn sandals", “That house is not so pretty, but it draws attention because of the contrast it produces with the surrounding buildings”.

Taking into account that mentioned meaning, we would have to determine that the term now in question is used very frequently within the journalistic field. And it is that for a media professional to offer truthful information and subject to reality it is necessary to contrast the data you already have.

Thus, for example, when someone involved in a fact gives him a piece of news, the logical thing is to get in touch with the other party involved to be able to contrast that one. In this way, it is how you will get to know what really happens.

It is usual to use the concept of contrast to name the relative difference in intensity that exists between a point of one image and its surroundings. When the contrast is null, it is impossible to distinguish an object from its background. On the other hand, the higher the contrast, the easier the differentiation.

The contrast, in the visual aspect of an image, also refers to the shortage of intermediate tones, so that the light and dark stand out with notoriety . An image composed of white squares and black squares will show an obvious contrast; On the other hand, if the squares included different shades on a gray scale, the contrast would be non-existent.

The substance which is introduced into the body to make observable the organs through X-rays or other similar methods is known as contrast. Without this contrast, the image that the professional intends to analyze would not be visible.

Iodine and barium are the two elements that give shape to that substance that is introduced into the body of the patient in question in order to subject it to tests such as x-rays or magnetic resonances with which you can know what is happening to you. Thus, some results will be obtained, which will allow to discover what disease he suffers, in what state is the pathology that he has already been diagnosed or what actions must be carried out in regard to a treatment.

In cases of cancer, kidney problems or gastrointestinal diseases is when the use of contrast is usually used.

The contrast, finally, is the brand that works as a guarantee of the objects of noble metal that have been verified (that is, that their authenticity has been proven).

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