Abstract
SUMMARYThe use of a heavy metal filter, namely Hafnium, with a K absorption edge at 65 key has reduced the skin dose by approximately 60% without image deterioration or x‐ray tube overload. The heavy metal foils are slightly more expensive than aluminium, around $150, however the large reduction in radiation levels to the patient and also around the operator area is worth the expense.ABSTRACTA heavy metal filter with a K absorption line at 65 kev has been used to reduce the radiation output of the Image Intensifier System to that required by the State Radiation Act.Radiologists have seen no great deterioration in the stored image on the T.V. Screen and very little compensation, in the way of kV, or mA, is required.To reduce radiation levels further to the patient, a Matrix Instruments Video Imager is incorporated into the unit and film recording taken of the stored image. This method is used instead of a Radiographic Exposure.
Published Version
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