How to Specify the Cine Display Rate

There are multiple ways of specifying Cine Rate (Multi-Frame Display Speed) in DICOM, in two categories:

The actual acquisition times of the frames

There are two ways of specifying this, equally spaced or arbitrary, and the choice is defined by attribute Frame Increment Pointer (0028,0009), which will point at one or other of the following attributes:

Recommended Display Frame Rate (0008, 2144)

This is specified in frames per second (unlike the acquisition times) and does NOT necessarily have to be the same as that calculated from the above, though there is no reason why it should be different. One thing to note, this rate is of type Integer, so if frame times were say 150ms, then this would need to be 6 or 7, not the calculated value of 6.67.

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