Titlebook: Radiographic Photography and Imaging Processes; David Jenkins Book 1980 David Jenkins 1980 film.imaging techniques.photography.quality con

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Automatic Exposure Control,perator freedom of choice of kV. The eventual aim, however, is to produce a constant image density independent of patient parameters, and with an automatic exposure system very careful technique is required to achieve this.

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Identification, Presentation and Viewing of Radiographs,l the information required should be seen in the image without the attendant problems of inadequate centring and a radiation beam area which is either too large or too small. It is all too easy to neglect these aspects in a busy, overworked department, which leads to a general decline in imaging standards and results.

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Film Behaviour to Exposure,st some of the important questions that require an answer and unfortunately a few cannot be satisfactorily answered. As an attempt to answer some of these questions the characteristic curve must first be introduced.

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Cassettes,films when exposed, or a roll of film. An exception to this is the xerographic cassette which contains not film, but a selenium-coated aluminium plate. Here the image is formed as a charge pattern on the selenium and only transferred to a paper image during the processing stage; this is discussed more fully in Chapter 15.

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Imaging Techniques and Processes, to now have either not been mentioned or only briefly touched upon. These techniques include macroradiography, stereoradiography, tomography, xeroradiography, ionography and photofluorography. These will also be discussed.

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