. American quarterly of roentgenology . ound atoperation. He concludes that previous disease probably resultedin granulation tissue which gave a cloudy appearance to the cells. Technique. In the first place I believe we should alwaysmake our studies complete and I believe that a complete studyof the sphenoid involves the other accessory sinus as well. Thisof course increases the time consumed as well as the expense,but it will go far toward eliminating error, and will at the sametime I am sure often show more extensive disease than wouldotherwise be expected and by so doing the Rhinologist is
. American quarterly of roentgenology . ound atoperation. He concludes that previous disease probably resultedin granulation tissue which gave a cloudy appearance to the cells. Technique. In the first place I believe we should alwaysmake our studies complete and I believe that a complete studyof the sphenoid involves the other accessory sinus as well. Thisof course increases the time consumed as well as the expense,but it will go far toward eliminating error, and will at the sametime I am sure often show more extensive disease than wouldotherwise be expected and by so doing the Rhinologist is givenfull information concerning^ all of the sinuses, and can treat atonce all of them more skillfully, thus lessening the duration ofthe illness and in the end being distinctly economical. In my judgment a complete study involves two postero-anteriorexposures, two lateral (made stereoscopically) and two certain cases to this might be added an antero-posterior and avertical. When the exposures must be limited as much as pos-. Fig. 2.—Right sphenoidal sinus injected with bismuth paste in acadaver. Postero-anterior view. Notice the dotted outline of the leftsinus which shows as clearly as the one injected. Pfahler: Sphenoid Sinus Disease. 59 sible on account of either the expense or condition of the pa-tient one postero-anterior and one lateral view will give mostinformation and in most instances will suffice for a diagnosis- The Postero-anterior View (No. 1) is made by placing thepatient in a prone position. (When circurnstances actually de-mand it the patient may be allowed to sit up or may lie uponhis back, but this will involve unusual or improvised appli-ances.) The plate is placed under the face so as to include thefrontal sinuses and the maxillary sinuses. The tube is placedover the occipital region at a distance of 22 inches and locatedso that the central rays will pass through the median line andin a postero-anterior plane which extends from the base of then
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