Empty Velocity Encoding Macro in Philips MR Enhanced multiframe dataset?

[Simon]

Hi all,

Is it normal to have an empty Velocity Encoding Macro in a Philips MR Enhanced multiframe dataset that is clearly a Phase Contrast series? Is there any reason (other than misconfiguration/bug) why the macro items are all in zeros?

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FYI The Philips DICOM Conformance Statement describes support for the macro as such:

MR Velocity Encoding

>MR Velocity Encoding Sequence 0018,9197 SQ ANAP , AUTO
>>Velocity Encoding Direction 0018,9090 FD ANAP , AUTO
>>Velocity Encoding Minimum Value 0018,9091 FD ANAP , AUTO
>>Velocity Encoding Maximum Value 0018,9217 FD ANAP , AUTO

Where ANAP = the attribute is present under specified condition – if present then it
will always have a value
AUTO = the attribute value is generated automatically

[wim.corbijn.va...@philips.com]

Hi Simon,

Please send the dataset to the Philips DICOM helpdesk with the same question.
(address is straightforward DICOM with the normal international Philips end).
We can have a look if we understand why the zero's are there or if it is indeed a bug as you suspect.
Misconfiguration is hardly possible as you can't configure this.

Regards
Wim