. The American journal of roentgenology, radium therapy and nuclear medicine . Pfender, Pro-fessor of Roentgenology at GeorgetownUniversity, for kindly advice and assist-ance; also Dr. J. A. Gannon and Patterson of the Washington AsylumHospital for the facilities afforded to dothis work. A NEW APPARATUS BY CHARLES M. MING. MIX OKMULGEE, OMAHA V ^HE accompanying illustration depictsan immobilizing device designed bymyself and found to be most satisfactory forcomplete fixation of the head in roentgeno-graphs work. The apparatus consists of a heavy Hatiron bar which is bent to form a right
. The American journal of roentgenology, radium therapy and nuclear medicine . Pfender, Pro-fessor of Roentgenology at GeorgetownUniversity, for kindly advice and assist-ance; also Dr. J. A. Gannon and Patterson of the Washington AsylumHospital for the facilities afforded to dothis work. A NEW APPARATUS BY CHARLES M. MING. MIX OKMULGEE, OMAHA V ^HE accompanying illustration depictsan immobilizing device designed bymyself and found to be most satisfactory forcomplete fixation of the head in roentgeno-graphs work. The apparatus consists of a heavy Hatiron bar which is bent to form a right angleat one end. To the other end there isaffixed an adjustable clamp. This is se-cured with a winged nut. When clampedinto place the bar is quite rigid. Theheadrest is attached by means of a boltinserted into a hole which has been drilledin the center of the bar. \1\ apparatus is fitted on a VictorPotter Bucky diaphragm using a Kelley-Koett headpiece. Straps, rubber bags, thus eliminated and the cone need nottouch the head. Bag compression can be used it STANDARDIZATION OF THE MEASUREMENT OF TUBE POTENTIAL* BY FRANK RIEBER SAN FRANCISCO, CALIFORNIA TN measuring the radiation given oft. from an x-ray tube we can do one ottwo things. We can measure what comesout of the tube in the form of x-rays. Orwe can measure what we put into the tube,in the form of electricity, and then, fromour experience with this tube, we canpredict or estimate what is coming out ofthe tube in the form of rays. The first method—that of measuringthe rays themselves—was at first triedin various forms with pastilles, radiometers,and other measuring instruments. TheCoolidge tube had not been introduced fortherapeutic purposes at this time, and thegas tubes which were used were extremelyunstable. The various radiometer measurementsdid not check accurately in all cases withthe therapeutic results. Their use wascontinued only because it was so thor-oughly difficult to maintain a gas tube
Size: 1495px × 1671px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1900, bookyear1906
