. The American journal of roentgenology, radium therapy and nuclear medicine . on the filament control will not frequently test out the length of theparallel spark while the exposure is inprogress, and always do so between themaking of stereoscopic pairs where speedis not paramount. Most of my failures to get fair resultscan be attributed to fluctuation either ofthe filament or high potential current. Ihave not tried the current stabilizer nowcoming into use, but feel that a perfectlystable current would eliminate my great-est source of failure. In spine work I employ a spark lengtho
. The American journal of roentgenology, radium therapy and nuclear medicine . on the filament control will not frequently test out the length of theparallel spark while the exposure is inprogress, and always do so between themaking of stereoscopic pairs where speedis not paramount. Most of my failures to get fair resultscan be attributed to fluctuation either ofthe filament or high potential current. Ihave not tried the current stabilizer nowcoming into use, but feel that a perfectlystable current would eliminate my great-est source of failure. In spine work I employ a spark lengthof from three to five inches, depending. Fig. 12. Fracture of Transverse Processes ofSecond, Third, and Fourth Lumbar. Fig. 13. Destructive Lesion of the Upper LateralMargin of Third Lumbar with Narrowing ofContiguous Joint Slit. The lesion is believed to be tubercular. upon the thickness of the patient. For thepatient of average size a gap of four tofour and a half inches is used, and a gapof five inches, which is never exceeded, isused only in the very stout, and occa-sionally for the lateral exposures. Muchwork is done with a back-up spark of onlythree and a half inches. A difference of aninch or even half an inch in potential asmeasured on the parallel gap may deter-mine the worth or worthlessness of a plate. Technique of Roentgen Examination of the Spine I must confess to the very unscientificpractice of never looking at my milH-amperemeter. As a matter of fact withthe rheostat setting employed, and with aback-up spark of four and a half inches,it registers about twenty-two milliam-peres. I must confess also that I gues
Size: 1500px × 1665px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidamericanjour, bookyear1906
