身體內 異物 位置 撮影에 관한 硏究 = A Study on the Radiographic foreign Body Localization in Body

다국어 초록 (Multilingual Abstract)

In the diagnostic radiology of the localization foreign body, conventional radiography are various technique. Radiographic foreign body localization is a procedure for determining the presence, and later the position, of any extraneous object or material within the body. For localization of foreign bodies, the radiographic method is the most satisfactory. It permits direct observation of the foreign body, as well as providing a permanent record. There are various methods of foreign body localization, each having its own particular merits. I discovered a new radiographic method.
The method are as follows.
1. Arrange the tube and fluoroscopic screen as for ordinary horizontal fluoroscopy. Investigate for presence and position of the foreign body. Direct the path of the CR through the foreign body by narrowing or "closing down" the shutter opening, and mark the skin surface to identify the position of the foreign body.
2. Position the X-ray tube, aligning the CR to the spot marked on the skin surface. Select the most practical FFD. Which maybe 30, 36, or 40 inches, but the exact FFD must be known, at the time of exposure, the exact distance should be indicated on the film by suitable lead marks. (+ type)
3. Position the film beneath the part or area and make an exposure using about one-half to two-thirds of the mAs normally reguired for the part in question.
4. Shift the tube a known distance (about 25 percent of the FFD) cephalad, caudad, or transversely and make a second exposure using the same factors.
5. Process the film in the usual manner.
6. Carefully measure the distance between the two images of the foreign body as projected onto the film.
7. Apply the formula :
Foreign body - Film distance =image shift × Focal - film distance/image shift - tube shift
8. Applied small focus and fixed FFD. I resulted used in this radiographic technique. 1. Time saving in radiography. 2. The clean image of foreign body on radiographic image. 3. I gained accurate image better than conventional radiography.