. The principles and practice of roentgenological technique . zation Clamps to side of head \\eighted canvas band over forehead Tube Position Lower edge of five inch cone at supraorbital ridge, tilt downward 20°Elevate one inch from skinCentral ray just above and between frontaleminences lb. Antero-Posterior (for Antero-Posterior\^iew of Mastoid Process) Posture Occiput to plate Immobilization Band over forehead, clamps to side Tube Position Small cylinder tilted five degrees inwardCentral ray through tip of mastoid HEAD 151 2a. Postero-Anterior(For maxillary sinuses and incisor teeth) Posture
. The principles and practice of roentgenological technique . zation Clamps to side of head \\eighted canvas band over forehead Tube Position Lower edge of five inch cone at supraorbital ridge, tilt downward 20°Elevate one inch from skinCentral ray just above and between frontaleminences lb. Antero-Posterior (for Antero-Posterior\^iew of Mastoid Process) Posture Occiput to plate Immobilization Band over forehead, clamps to side Tube Position Small cylinder tilted five degrees inwardCentral ray through tip of mastoid HEAD 151 2a. Postero-Anterior(For maxillary sinuses and incisor teeth) Posture (Fig. 211) Chin to plate Nose 1 to cm. from plate. Immobilization Clamps to side of headPressure of cone above Tube Position Central ray through base of nose, perpen-dicular to recording surfaceLong axis of tube parallel to plateFive inch cone, 2 inch from head 2b. Postero-Anterior (for frontal bone.)Posture Nose and forehead to plate which is placedhorizontally. A line through glabella andsymphysis of jaw should be horizontal. Immobilization As above. Fig. 211.—Position for maxillary sinuses and incisorteeth. (Waters and Waldron). Tube Position Central ray two inches below occipital pro-tuberance 3. Infero-Superior(For sphenoidal sinuses and base of skull)(Structures of mouth—salivary calculus) Posture (Figs. 212, 213) Patient supine, head hangs over edge oftable until Reids line is horizontal. Fiveinch cone. Edge at symphysis of jaw. In-cline five degrees toward chin. Plate atvertex. For salivary calculus, film hor-izontally in mouth. Intensifying screenmay be necessary. Immobilization Weighted band over forehead Tube Position Five inch cone, directed under chin, towardsbase
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectradiogr, bookyear1920
