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- W2083001544 abstract "SINCE the advent of the Pfahler-Kingery saturation method of deep roentgentherapy, many radiologists throughout the country have adopted that technic. Regardless of the technic employed in deep roentgentherapy, it is essential to chart accurately each patient to be treated. One objection that has been raised, however, is the tediousness of charting the patients. To obviate much of the unnecessary expenditure of time and energy, and to make the charts more convenient, and always at hand when treating the patient, we devised the following technic. An anatomic cross-section chart of the anteroposterior and transverse measurements of the patient, obtained by means of an obstetrical pelvimeter or calipers and reduced to one-half size, is made. The level of the anatomic cross-section is selected to represent the centers of the fields of radiation. The radiologist indicates, from information obtained from the surgeon or from his own knowledge of the case, the general location of the neoplasm, which determines the particular anatomic cross-section level chart to be enlarged. Either the Desjardins or Eycleshmyer anatomic charts are suitable for this procedure. The cross-section charts are reproduced upon standard lantern slides (4 × 3.75 in.). These can be purchased or they can be made easily by reprinting a negative lantern slide of one of the cross-section levels, which has previously been photographed, upon another lantern slide. This produces a final positive lantern slide of a reduced photograph of one of the cross-section levels, the result being a transparent slide with the outline imprinted in black. All the desired cross-section levels are reproduced upon lantern slides in a similar manner. Depending upon whether the patient is smaller or larger than the average, the anatomic cross-section chart is enlarged or reduced to one-half of the size of the patient to be treated. This can be accomplished by placing the respective cross-section level slide that represents the center of fields of radiation in a Kodak auto-focusing and enlarging device, or in a lantern-slide projector. The one-half size dimensions of the patient having been placed upon the paper, the image is then projected to conform to it. A sketch is made of this cross-section, and the anatomic structures of interest to the radiologist are included. The neoplasm is then located and drawn in by the radiologist. There is, as a result, a sketch of a plane passing through the tumor area, from which one may determine the size, direction, and number of ports of entry, enabling one to deliver intelligently the desired amount of radiation. To arrange these fields, and to avoid over-irradiation of the uninvolved viscera, tissue, and skin of the patient, we utilize the relative intensity charts. By placing these charts over the anatomic cross-section in various positions, one notes the relative percentage of radiation delivered at different depths beneath the skin." @default.
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- W2083001544 date "1933-11-01" @default.
- W2083001544 modified "2023-09-25" @default.
- W2083001544 title "An Improved Method of Charting Patients for Deep Roentgentherapy" @default.
- W2083001544 doi "https://doi.org/10.1148/21.5.454" @default.
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