Download AlongAway.prc 
PalmOS PDA Applications: Along & AwayAnother popular basis for brachytherapy QA are the GreenfieldTichmanNorman (GTN) linear source implant tables (Greenfield MA, Tichman M and Norman A, Dosage tables for linear radium sources filtered by 0.5 and 1.0 mm of platinum. Radiology 1959; 73:418). It is common for the original tables to be modified to yield cGy/milligramhour by dividing the original values by the factor C = 0.84 / (0.825 * 0.957) = 1.064 which corrects for the alteration of Γ for radium and converts exposure to dose to tissue. The tables can be adapted for HDR use by converting the original values to a more convenient form for Ir192 (Γ = 0.469) HDR by dividing the original values by C and then again by H_{GTN} = (3600 * 0.825 / 0.469) = 6333 to yield cGy/mCisec. The HDR dwell time in seconds is calculated by dividing the tabulated cGy/mCisec values by the prescribed dose (in cGy) and multiplying by the current activity of the source (in mCi). Note: The reciprocal (ie mCisec/cGy) is actually displayed in this calculator to be consistent with the PatersonParker based companion application for linear sources. Click here to download the .zip archive: Along & Away 1.0.0 (20K), last updated 9/16/03. Download: AlongAway.prc.zip (16K)
