Reasoning and discussion of spiral CT localization formula
- VernacularTitle:螺旋CT定位计算公式的推导与讨论
- Author:
Yongqiang ZHANG
;
Xingcan CHEN
;
Miao LIU
- Publication Type:Journal Article
- Keywords:
spiral CT;
CT localization;
equation development
- From:
Chinese Medical Equipment Journal
1989;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Using geometry principle of the spiral CT localization , functional relation was deduced between the bed coordinates and the diagram layers coordinates, i.e.when gantry angle is zero degree, the function relation type is Twm= S190/Cos? + M; Otherwise, it is Twm= S190/Cos? +M. Combined with the actual operation of CT localization, the formula of the CT localization is:Twm=S190/Cos?+M. Finally, the physical meaning and the simplified condition of the formula were discussed.
