问题
单项选择题
关于影响DSA对比剂注射流率的叙述，错误的是（）.
A.与导管长度成正比
B.与导管端相对于血管的方位有关
C.与对比剂黏度成反比
D.与导管半径的四次方成正比
E.与注射压力成正比
答案
参考答案：A
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关于影响DSA对比剂注射流率的叙述，错误的是（）.
A.与导管长度成正比
B.与导管端相对于血管的方位有关
C.与对比剂黏度成反比
D.与导管半径的四次方成正比
E.与注射压力成正比
参考答案：A
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