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Fig. 1 —Graphical display of Caregraph (Siemens Medical Solutions). Example
shows dose distribution at skin after cardiac radiofrequency catheter
ablation. In this study, dose–area product (DAP) was measured using
Caregraph, which consists of the Diamentor M4 system (PTW Freiburg). Caregraph
algorithm uses several factors to calculate patient skin dose, including
measured DAP, X-ray parameters (such as collimation size and angle view of
image intensifier), and patient size and position. Maximum radiation dose,
which is shown in red, received by right back skin was 2,098 mGy (total
fluoroscopic time = 214.5 min, DAP = 28,115 cGy x cm2).
Yellow shows areas of lesser radiation exposure.
