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British Journal of Radiology 74 (2001),48-55 © 2001 The British Institute of Radiology

Full paper

Skin dose and dose–area product values for interventional cardiology procedures

E Vano, PhD 1,2 L Gonzalez, PhD 2 J I Ten, BSc 3 J M Fernandez, BSc 1,2 E Guibelalde, PhD 2 and C Macaya, PhD 3

1 Medical Physics Service 3 Cardiology Service, San Carlos University Hospital 2 Radiology Department, Medicine School, Complutense University, 28040 Madrid, Spain

Correspondence: Professor E Vano, Catedra de Fisica Medica, Facultad de Medicina, Universidad Complutense, 28040 Madrid, Spain

Coronary angiography and percutaneous transluminal coronary angioplasty procedures performed in four different facilities were monitored in the present study by measuring maximum skin dose, dose–area product and other operational parameters. Radiographic slow film, thermoluminescent dosemeters and transmission ion chambers were used to measure dose related quantities. Values of 107–711 mGy for maximum skin dose and 27.3–370.6 Gy cm2 for dose–area product were found, together with cumulative skin dose estimates of 110–3706 mGy. A discussion of the relationship of measured dose–area product and skin dose values is made using a field concentration factor defined as a way to interpret the findings. No general correlation was observed between dose–area product and maximum skin dose. Cumulative skin dose estimates throughout a procedure should be discarded as a realistic method for assessing deterministic risk in cardiology procedures. Slow film in addition to thermoluminescent dosemeters for measurement of maximum skin dose is a good alternative, especially for complex interventional procedures. For repeated procedures, combining film and dose–area product monitoring favours optimization of radiation protection for the patient.




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