. Archives of physical medicine and rehabilitation . o:. ; ca. 6ie ,.. ICxlS yj^ - - - - I H.*. X-. -- C* eiic 9x12 .0x1. nxlS ZIX2D - - -- - X CO. «D an. - - 8x10 9x12 10x16 ■ SI, 30x30 -- -- -- - - - - to m. SO m. ~ - - - 6d BllO tii: 10x15 16x16 ao>a> - - - -- - - -- 90 CB. (0 on. - - - - - 6sS axio ,X13 10x15 15x15 0x30 - -- - - - €0 10x15 16x16 30x90 - - 90 o. KOC. - -- -- - - 6x8 exio 9x13 10x15 15x15 30raJ - 100 a». / being the discharge time of thelontoquantimeter with given factors,and 1- the discharge time with thesame factors in a 10 cm. depth. Hol-felder bel
. Archives of physical medicine and rehabilitation . o:. ; ca. 6ie ,.. ICxlS yj^ - - - - I H.*. X-. -- C* eiic 9x12 .0x1. nxlS ZIX2D - - -- - X CO. «D an. - - 8x10 9x12 10x16 ■ SI, 30x30 -- -- -- - - - - to m. SO m. ~ - - - 6d BllO tii: 10x15 16x16 ao>a> - - - -- - - -- 90 CB. (0 on. - - - - - 6sS axio ,X13 10x15 15x15 0x30 - -- - - - €0 10x15 16x16 30x90 - - 90 o. KOC. - -- -- - - 6x8 exio 9x13 10x15 15x15 30raJ - 100 a». / being the discharge time of thelontoquantimeter with given factors,and 1- the discharge time with thesame factors in a 10 cm. depth. Hol-felder believes that the varying de-grees of hardness produced by in- figures are not correct for all installa-tions and must bs verified and cor-rected before the table may be field selector consists of ascries of trial fields, which aretruncated triangles made of photo-. creasing the thickness of an alreadytieavy tiller (i. e. the difference be-tween rays passed through , and those passed through coppr) are not important Ijiolog-ically, and in using the field selectorthe various percentage depth doses graphically tinted celluloid; (Fig. 6),and an illuminated glass plate onwhich is printed a series of geomet-rical figures of varying density andof the same color as the trial tint of the trial fields progressesfrom dark to light from above down- ward, in carefully calculated per-centages, the various degrees of in-tensity of color corresponding to var-ious percentages of the Theyare calculated for depth dose per-centages of 15, 20, 25, 30, 35, 40,and 45 per cent, each percentagedepth dose having a number of trialfields. On the illuminated glass plateare a great number of figures, squares,triangles, points, and circles. Eachsquare, each triangle, each point andeach circle is of exactly the samelint, but the circles ar
Size: 2498px × 1001px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1920, bookyear1920
