System and method for testing intensity response of a medical mo

Details System and method for testing intensity response of a medical mo System and method for testing intensity response of a medical mo

1994-04-13

1995-08-08

Groody, James J.

Television

Monitoring, testing, or measuring

Testing of image reproducer

348177, 348180, 348181, 348184, H04N 1702

Patent

active

054403391

ABSTRACT:
The intensity output of a monochrome interlaced video monitor typically used in medical imaging may be tested as follows. The video card of a computer is controlled to output equal video intensity levels of red, green, and blue for a time sequenced series of different levels. These video signals are combined and attenuated such that the peak level of the series is about 700 mV, which is the industry standard for peak white on a monochrome monitor. The sync pulses from the video card are adjusted to about -300 mV, which is the industry standard for sync pulses driving a monochrome video monitor and are combined with the combined video signal to produce an intensity test signal for driving the monitor. The video card is controlled to produce a high line rate to drive video monitors having an (approximately double) high line rate and to produce a low line rate to drive video monitors having (an approximately double) low line rate.

REFERENCES:
patent: 4910681 (1990-03-01), Ohtake et al.
patent: 4974080 (1990-11-01), Fritchie et al.
patent: 5343242 (1994-08-01), Rowsell et al.
patent: 5345263 (1994-09-01), Miller
AverKey Pocket Size VGA to Video User's Manual, Issue No. 1 Nov. 15, 1992.

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