. Principles of electro-medicine, electrosurgery and radiology : a practical treatise for students and practitioners. With chapters on mechanical vibration and blood pressure technique . FOOT REST LOCK COUNTERWEIGHT (GI/ES PROPER BALANCE TO THETABLE IRRESPECTIVE OF POSI-TION OF TUBE BOX ORANGLE OF TABLE) TABLE LOCK(LOCKS TABLE AT ANY ANCLE) FLOOR LOCK Fig. 68—Combination Table and Radioscope.(Used as Horizontal Radioscope) Electro-Medicine, Electro-Surgery and Radiology 119 The duration of exposure is expressed in milliampere-seconds, andthese are obtained by multiplying the amount of current
. Principles of electro-medicine, electrosurgery and radiology : a practical treatise for students and practitioners. With chapters on mechanical vibration and blood pressure technique . FOOT REST LOCK COUNTERWEIGHT (GI/ES PROPER BALANCE TO THETABLE IRRESPECTIVE OF POSI-TION OF TUBE BOX ORANGLE OF TABLE) TABLE LOCK(LOCKS TABLE AT ANY ANCLE) FLOOR LOCK Fig. 68—Combination Table and Radioscope.(Used as Horizontal Radioscope) Electro-Medicine, Electro-Surgery and Radiology 119 The duration of exposure is expressed in milliampere-seconds, andthese are obtained by multiplying the amount of current (in milliam-peres) flowing through the tube with the duration of exposure (in sec-onds) ; e. g., if we are using 5 milliamperes of current for 10 seconds, itmeans 50 milliampere-seconds, and it is the same as if we used 10 milli-amperes for 5 seconds, or milliamperes for 20 Fig. 69—Combination Table and Radioscope (shownin Fig. 68). (Used as Vertical Radioscope) The best method for determining exposure, without a seconds watch,is to count seven as fast as possible for each second of time. The milliampere-meter is used in connection with a transformer todetermine the current which passes through the X-ray tube, but is ofno value with the portable coil or a static machine. 120 Anthony Matijaca
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