Source- to- Film Fixed Distance 2 Copy

                                                            Illustration 3 B Source to Film—- fixed distance

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CONCLUSION——– The closer the subject is to the film —————-the smaller, more true to form and sharper focus will be the image. .

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. . . . . . We know that the X-Ray image

is black and white ( and all the infinite shades of gray in between ). Our challenge is to focus on a given area of the X-Ray and match it according to location, color [ white….light gray…..dark gray………black ] and shape with a differential diagnosis of :

normal,

bone,

tumor,

pneumonia,

blood,

muscle,

air,

lung,

fat,

etc.

The task is aided and the differential narrowed by clinical correlation.

Let us now address the question of color coding of common tissues.

Please click on

to correlate common tissues and their expected color ( shade of black and white ) on the X-Ray.