. Radiography, X-ray therapeutics and radium therapy . lly shown in Fig. 109, butit is necessary to illustrate thisparticular region fully, for it ishere that the difficulty of show-ing a fracture or dislocation maybe very great, and in some in-stances impossible. An antero-posterior view ofthe neck region is not a verysatisfactory one, because of thesuperimposing of the occipitalregion and the lower jaw. Incases where it is desirable to showthe atlas and axis, and the articu-lation between the former and the occipital bone, it is necessary to take theskiagram through the open mouth, as descri
. Radiography, X-ray therapeutics and radium therapy . lly shown in Fig. 109, butit is necessary to illustrate thisparticular region fully, for it ishere that the difficulty of show-ing a fracture or dislocation maybe very great, and in some in-stances impossible. An antero-posterior view ofthe neck region is not a verysatisfactory one, because of thesuperimposing of the occipitalregion and the lower jaw. Incases where it is desirable to showthe atlas and axis, and the articu-lation between the former and the occipital bone, it is necessary to take theskiagram through the open mouth, as described in detail above. Theresulting picture is necessarily small, but large enough to include theparts desired. The position usually taken is the lateral one, with the head rotatedtowards the plate. It is then possible to get a fairly good outline of the sevencervical vertebrae and the adjacent portions of the base of the skull. Thebodies of the cervical vertebrae are readily shown, but to get accurateoutlines the head must not be moved to either Fig. 110.—Normal cervical and upper dorsal regionshowing the sterno-clavicular articulation. Thisposition is useful when examinations for cervical ribshave to be made. The Bones of the Chest The Clavicles may be examined in their entire length, or in sections whenthe shoulder or upper thorax are in the picture. The patient is placed withthe plate on the front of the chest, and the tube is operated either from belowor from above, whichever is the more convenient. The Sternum has often to be examined, the position in which it is usuallytaken being from behind forwards. The picture is usually confused by theshadows of the mediastinum and spinal column. An oblique lateral view 132 RADIOGRAPHY of the thorax enables us to examine the whole of the sternum with its articula-tions. The picture is naturally somewhat distorted, but nevertheless a goodidea may be obtained of its condition, injuries and tumours being readilyshown. The ribs c
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