Method and computed tomography gantry for measurement of...

Details Method and computed tomography gantry for measurement of... Method and computed tomography gantry for measurement of...

2008-04-15

2008-04-15

Epps, Georgia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S231140, C250S492100

Reexamination Certificate

active

07358479

ABSTRACT:
In a gantry for an x-ray computed tomography apparatus with a rotor and a stator and a device for measurement of the rotation angle as well as a method for measurement of the rotation angle, a disc is provided with markings that rotate relative to a detection device for detection of the markings. Electrical signals are generated by the detection device, and an evaluation device converts the signals into a measurement signal corresponding to the respective rotation angle. To increase the precision of the measurement, a low-pass filter is connected upstream of the evaluation device.

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patent: 100 38 296 (2002-02-01), None
“Phase Locked Loop (PLL),” Hermann.

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