Regarding digital subtraction angiography (DSA):
a. It is a high-dose technique with a lower dose of contrast medium
b. Misregistration is more prominent at the boundaries between low-contrast details
c. Pixel shifting can be done for each movement in the field of view
d. The signals of the contrast and mask images are converted into their logarithms prior to subtraction because of the exponential nature of the attenuation
e. Taking several mask and contrast images, with later subtraction according to the table position, will need less examination time but more contrast medium