Distortion of Image due to Limited Range of Rotation of X-ray Tube in Axial Transverse Tomography

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The axial transverse tomograms are taken by means of the unit of the horizontal type. The range of tube rotation is 360° or 220°, and the direction of the central X-rays is craniocaudal or caudocranial for the patient laid supine on the tomographic table. The conclusion is that the tomogram of the neck taken caudocranially, that of the chest taken craniocaudally and that taken either caudocranially or craniocaudally by means of the above 220° rotation of the X-ray tube can be substituted for the tomogram taken by the standard technique of full rotation of 360°.

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