Modelling the effect of lead and other materials for shielding of the fetus in CT pulmonary angiography.

@article{citeulike:2911719, abstract = {The aim of this work is to construct and validate a model to describe the variation in fetal dose as a function of the thickness of abdominal lead shielding used during CT pulmonary angiography and to determine the optimal shielding material. An anthropomorphic phantom was modified to contain a 15 cm(3) ionization chamber at the site of the uterus. Fetal dose was measured with varying thicknesses of lead shielding at four values of tube potential (kV(p)). Data generated by the proposed model were compared with experimental data to determine the validity of the model. The effect of lead shielding has been modelled accurately and results have shown that, although alternative materials could be used, lead is an effective and practical shielding material. In conclusion, lead remains a suitable shielding material and a pair of conventional lead aprons provides significant shielding for the fetus; we recommend that aprons should be reserved specifically for this purpose. However, it is possible that a dedicated and specifically designed lead shield could reduce fetal dose more effectively whilst also reducing patient discomfort.}, address = {Department of Medical Physics \& Engineering, Leeds Teaching Hospitals NHS Trust, Leeds General Infirmary, Leeds LS1 3EX, UK. gri@medphysics.leeds.ac.uk}, author = {Iball, G. R. and Kennedy, E. V. and Brettle, D. S. }, citeulike-article-id = {2911719}, issn = {1748-880X}, journal = {The British journal of radiology}, keywords = {angiogram, angiography, ct, ctpa, dose, fetus, pregnancy, pregnant, pulmonary, shielding}, month = {June}, number = {966}, pages = {499--503}, posted-at = {2008-06-21 02:40:41}, priority = {2}, title = {Modelling the effect of lead and other materials for shielding of the fetus in CT pulmonary angiography.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/18487390}, volume = {81}, year = {2008} }

TY - JOUR ID - citeulike:2911719 L3 - citeulike-article-id:2911719 TI - Modelling the effect of lead and other materials for shielding of the fetus in CT pulmonary angiography. JF - The British journal of radiology VL - 81 IS - 966 SP - 499 EP - 503 AD - Department of Medical Physics & Engineering, Leeds Teaching Hospitals NHS Trust, Leeds General Infirmary, Leeds LS1 3EX, UK. gri@medphysics.leeds.ac.uk SN - 1748-880X N2 - The aim of this work is to construct and validate a model to describe the variation in fetal dose as a function of the thickness of abdominal lead shielding used during CT pulmonary angiography and to determine the optimal shielding material. An anthropomorphic phantom was modified to contain a 15 cm(3) ionization chamber at the site of the uterus. Fetal dose was measured with varying thicknesses of lead shielding at four values of tube potential (kV(p)). Data generated by the proposed model were compared with experimental data to determine the validity of the model. The effect of lead shielding has been modelled accurately and results have shown that, although alternative materials could be used, lead is an effective and practical shielding material. In conclusion, lead remains a suitable shielding material and a pair of conventional lead aprons provides significant shielding for the fetus; we recommend that aprons should be reserved specifically for this purpose. However, it is possible that a dedicated and specifically designed lead shield could reduce fetal dose more effectively whilst also reducing patient discomfort. KW - angiogram KW - angiography KW - ct KW - ctpa KW - dose KW - fetus KW - pregnancy KW - pregnant KW - pulmonary KW - shielding AU - Iball, GR AU - Kennedy, EV AU - Brettle, DS PY - 2008/06// UR - http://view.ncbi.nlm.nih.gov/pubmed/18487390 ER -