Which of the Following Is True Concerning Adaptive Statistical Iterative

Which of the following is true concerning adaptive statistical iterative reconstruction (ASIR) ?

A) ASIR is a reconstruction technique that starts reconstruction after a first-pass FBP reconstruction
B) ASIR techniques shorten reconstruction time while maintaining much lower image noise than if the same raw data were reconstructed with FBP alone
C) ASIR reduces quantum noise substantially with no impact on spatial or contrast resolution
D) All of the above