Radiation dose reduction in paediatric fluoroscopy using added filtration.
Studies on a water phantom indicate that the insertion of extra tube filtration combined with the removal of the antiscatter grid can reduce the total energy imparted from paediatric fluoroscopy by a factor of more than four when automatic exposure control is used. The omission of the grid is responsible for up to 40% of the reduction while the addition of 0.7 mm steel filtration is found to account for a further reduction in energy imparted of between 57% and 70%, for depths of water simulating small patients of 6-16 cm thickness. For all contrast paediatric examinations the reduction in image quality was considered to be small and the diagnostic information unimpaired with the filter in place.
Nicholson
R A
RA
Department of Radiology, St Mary's Hospital, London, UK.
Thornton
A
A
Akpan
M
M
D002648:Child; D003300:Copper; D005374:Filtration / Q000295:instrumentation; D005471:Fluoroscopy / Q000295:instrumentation* / Q000379:methods; D006801:Humans; D008961:Models, Structural; D011786:Quality Control; D011829:Radiation Dosage; D011835:Radiation Protection / Q000379:methods*; D011856:Radiographic Image Enhancement; D013232:Steel; D014867:Water
D014867:Water; D013232:Steel; D003300:Copper