In a T2-weighted image, contrast between tissues can be optimised by selecting an appropriate:
查看答案
As the number of phase encoded echoes acquired increases:
A. ) the image resolution increases.
B. ) the image resolution decreases.
C. ) the image resolution is unaffected.
The phase encoding gradient is applied:
A. ) Before the read gradient.
B. ) After the read gradient.
C. ) At the same time as the read gradient.
If a frequency encoding gradient is applied along the Y-axis, then the echo signal will be a projection against the:
A. ) X-axis.
B. ) Y-axis.
C. ) Z-axis.
A longer pulse length will excite a:
A. ) narrower range of frequencies.
B. ) broader range of frequencies.
C. ) range of frequencies equal to the pulse time.
微信支付 
支付宝支付