progressive scan

(redirected from sequential scan)

progressive scan

Illuminating a screen by displaying lines sequentially from top to bottom. Also called "non-interlaced," all modern computer monitors and digital TVs support progressive scan. For example, the "p" in 720p means that it displays 720 lines, one after the other, for each video frame. The highest progressive format in common use is 1080p.

Contrast with "interlace" or "interlaced," which illuminates every odd line first and then goes back and fills in the even lines. Given the same frame rate, progressive scan displays twice as many lines on screen in the same time. See interlace, frame rate, progressive scan DVD, progressive scan TV, HDTV, deinterlace and DTV.


References in periodicals archive ?
The patients underwent image acquisition in the electrocardiogram (ECG)-triggered sequential scan mode, retrospective ECG-gated spiral scan mode, or high-pitch spiral scan mode, as appropriate.
Coronary calcium was quantified by the CACS based on a noncontrast-enhanced sequential scan and evaluated with a commercially available software package (Siemens Calcium Score, Siemens, Erlangen, Germany).
There is a substantial difference between these two methods of evaluation, since fetching an additional block of records from disk in a sequential scan takes much less time than fetching an arbitrary block randomly, which takes even less time than the time for inserting/deleting a record.
For sequential scan, there is no need to identify the corresponding fragments on an individual basis.
It is selectable for Fahrenheit or celsius temperature readings, offers high and low set points with audible alarms, can store and recall 2520 readings per channel and has a 10 second to hourly sequential scan capability.
With accuracy of [+ or -] 0.1 percent, this reliable gas scanner is equipped with RS-232C for out-put to a PC or data logger, selectable F[degrees] or C[degrees] settings, hi/lo set points with audible alarm, store/ recall of 2520 readings per channel, 10 second-to-hourly sequential scan capability, real time digital clock, non-volatile memory, full immunity to RF interference and a three-year warranty.
Query Q8A implements a complete sequential scan on the PART table.
So if we give exactly the same injection protocol each time, that removes the rate of injection and other variables that occur between sequential scans because we follow the exact same injection protocol as before.
Instead of three sequential scans to show progression of disease dissemination over time, the new criteria state that two are adequate--a reference scan done after the initial clinical event, and a follow-up scan with gadolinium enhancement at least 3 months after the event, or a new T2 lesion at any time when compared with a reference scan performed at least 30 days after the event (Annals of Neurology, http://dx.doi.org/10.1002/ana.20703).
Instead of three sequential scans to show progression of disease dissemination, the new criteria state that two are adequate--a reference scan done after the initial clinical event and a follow-up scan with gadolinium enhancement at least 3 months afterward, or a new T2 lesion at any time when compared with a reference scan done at least 30 days after the event (Annals of Neurology, http://dx.doi.org/10.1002/ana.20703).
For sequential scans, the response time decreases because more processors and disks are used to execute the query.
They concluded that, although periprosthetic activity generally decreased over time, there was considerable patient-to-patient variation, and sequential scans are needed to determine the significance of increased periprosthetic uptake (Figure 4).

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