Answer #55

The correct answer is C: There is increased temporal resolution.

Color power Doppler is a modality that measures ampltiude of Doppler shift only and not direction or velocity. There is thus only one color for flow and you cannot tell which way it is going using this modality alone. As such it has increased ability to pick up low flows that might have multiple directions (like ASD flow). It also is not affect much by large changes in angle as it does not care about velocity information.

For the same reason, Color Power Doppler does not alias since it is not using velocity information. It is more succeptible to motion artifact however and actually has lower frames rates than conventional Color Doppler, meaning decreased temporal resolution.