View single post by hdhollen

Posted: Tue Jul 8th, 2008 04:34 pm

Joined:	Thu Jun 28th, 2007
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Mana:

To what degree do the cardiac acquisition modes on the GE VCT Scanner such as Snapshot segment and Snapshot burst and burst plus have on the severity of misregistration artifact that you would see on study as well as the different pitches within those modes?

For example:In regards to patients that are pre pulmonary vein ablation- if the patients HR is in the range in which you would use Snapshot burst when they get on the table, then they drop to the Snapshot segment range will there be an increased likelyhood of misregistration artifact outside of the fact that the HR varies.

In regards to patients for CCTA in which we would rarely use anything other then snapshot segment, if we select a pitch of .18 becuase the patients HR went low into the 40`s during part of the exam and then varies between 50 and 60 during the CCTA acquisition which a pitch of .20 or .22 is called for ,will there be an increased incidence of misregistration artifact even though the HR is at a nice slow pace?

And "vice versa" for both of these scenario`s .

Also if misregistration artifact is present on a scan, will it always be in increments of 40mm because that is the size of the detector in the "Z" Axis?

Thanks

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