The Roentgen rays in medicine and surgery as an aid in diagnosis and as a therapeutic agent : designed for the use of practitioners and students (1901)
Williams, Francis H. (Francis Henry), 1852-1936 · New York, Macmillan · leaf 113
e case may be, and the tube opposite the screen on theother side of the patient. The position of the shadow cast uponthe screen is then noted. Next the tube is moved — vertically ifthe patient is examined sitting up, and horizontally if he is lying down— through a distance of 30 to 60 centimetres,… … METHODS OF EXAMINATION 83
Radiography · X-rays
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