Linear tomography

Hey, what’s up…..? Before I go into explaining what linear tomography is let me explain what tomography is. Basically, tomography is a radiologic technique for obtaining clear X-ray images of deep internal structures by focusing on a specific plane within the body. Structures that are obscured by overlying organs and soft tissues that are insufficiently delineated on conventional X-rays can thus be adequately visualized.


Out of the many contending tomography modalities the simplest of the all is linear tomography, in which the X-ray tube is moved in a straight line in one direction while the film moves in the opposite direction. As these shifts occur, the X-ray tube continues to emit radiation so that most structures in the part of the body under examination are blurred by motion. Only those objects lying in a plane coinciding with the pivot point of a line are seen sharply on the diagnostic image.

The purpose of this approachy is the ability to image structure that would otherwise be superimposed by a diffrent tissue or organ. An advantage of linear tomography is its contrat resouloution... so it is easy to diffrenciate two structure from the other(this feature is enhanced with cintrast). A disavantage is the high patient dose.