CONCLUSION

Our study demonstrates that the four-pass operator is more isotropic than the two-pass operator. The four-pass technique requires equal spacing along x and y; otherwise, we would have to use interpolation, which could cause artifacts.

In future study, we will compare the four-pass method with Hale-McClellan method.

 

slice220 Figure 5 Depth slice from the two-pass technique.

 

slice420 Figure 6 Depth slice from the four-pass technique. It is more circular than that of the two-pass method. Click on the button to see the movie.