PURPOSE: To address the optimal scanning condition of high resolution computerized tomography from the perspective of minimizing exposed dose. METHOD: The influence of the electric current, the slice number, and the slice thickness on precise percent ratio of the low attenuation area to whole lung field (LAA%) of chronic obstructive pulmonary disease patients was examined. The standard conditions were 250 mA, 3 slices, 2 mm slice thickness, and a varied parameter. RESULTS: In cases showing an LAA% less than 30, LAA% obtained by < or =150 mA were significantly larger than those by 250 mA. The mean LAA% with 3 and 10 slices were well correlated and the correlation with lung function was similar. The correlation of LAA% with lung function was approximately the same between the 2 and 5 mm slice thicknesses. CONCLUSION: The electrical current must be > or =200 mA, and 3 slices and 2 mm slice thickness are appropriate.
PURPOSE: To address the optimal scanning condition of high resolution computerized tomography from the perspective of minimizing exposed dose. METHOD: The influence of the electric current, the slice number, and the slice thickness on precise percent ratio of the low attenuation area to whole lung field (LAA%) of chronic obstructive pulmonary diseasepatients was examined. The standard conditions were 250 mA, 3 slices, 2 mm slice thickness, and a varied parameter. RESULTS: In cases showing an LAA% less than 30, LAA% obtained by < or =150 mA were significantly larger than those by 250 mA. The mean LAA% with 3 and 10 slices were well correlated and the correlation with lung function was similar. The correlation of LAA% with lung function was approximately the same between the 2 and 5 mm slice thicknesses. CONCLUSION: The electrical current must be > or =200 mA, and 3 slices and 2 mm slice thickness are appropriate.
Authors: F Mitsunobu; T Mifune; K Ashida; Y Hosaki; H Tsugeno; M Okamoto; S Harada; S Takata; Y Tanizaki Journal: Thorax Date: 2001-11 Impact factor: 9.139
Authors: C P Heussel; F J F Herth; J Kappes; R Hantusch; S Hartlieb; O Weinheimer; H U Kauczor; R Eberhardt Journal: Eur Radiol Date: 2009-05-21 Impact factor: 5.315
Authors: M Pescarolo; N Sverzellati; A Verduri; A Chetta; E Marangio; M De Filippo; D Olivieri; M Zompatori Journal: Radiol Med Date: 2008-07-10 Impact factor: 3.469
Authors: Suzanne Marsh; Sarah Aldington; Mathew V Williams; Michael Nowitz; Andrew Kingzett-Taylor; Mark Weatherall; Phillipa Shirtcliffe; Alison Pritchard; Richard Beasley Journal: Int J Chron Obstruct Pulmon Dis Date: 2006