. X-ray observations for foreign bodies and their localisation . rshould close an eye until he sees one picture clearly both eyes are open a stereoscopic projection is position of the sinus (marked by the metal disc) becomesevident ; and sequestra or foreign bodies, which might appearas one in an ordinary radiograph, will now stand out inrelief, and can be enumejated, and accounted for at thesubsequent operation. (Plate i.) Should the letter placed anteriorly appear on the side oppo-site to the observer, he is viewing the posterior aspect; toobtain the anterior aspe
. X-ray observations for foreign bodies and their localisation . rshould close an eye until he sees one picture clearly both eyes are open a stereoscopic projection is position of the sinus (marked by the metal disc) becomesevident ; and sequestra or foreign bodies, which might appearas one in an ordinary radiograph, will now stand out inrelief, and can be enumejated, and accounted for at thesubsequent operation. (Plate i.) Should the letter placed anteriorly appear on the side oppo-site to the observer, he is viewing the posterior aspect; toobtain the anterior aspect, he must incline the head to theopposite side and use the other mirror. Cross Section Localisation by Three Intersecting Lines.* The old method of localisation by two intersecting lines was not exact, and the method and technique to be described has been developed and perfected by the author. It is un- Belot et Fraudet, Jour, dc Radiol, et dEkcli other., Jan., M. Flint, Ann. Surg., Aug., C. Gage, Aicli. Radiol, and Elccirollicr., June, A typical stereo-radiograph which if viewed with a mirror will immediatelyillustrate the advantages of the method described. (The sinus in this case is marked with a pin.)Plate I. 44 X-Kav Observations for Foreign Bodies doubtedly the one of choice where the foreign body can be-seen on the screen. It is independent, as will be seen, of anymathematical calculations, it is accurate, and the results areself-proving, for the chart, when complete, discloses at once ifthe observations have been made correctly or not. The methodin itself comorises geometrical and anatomical localisation
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