摘要:
A data transmission system that includes a transmitter; a receiver; and a magnetically coupled rotary transformer having a first portion and a second portion in moveable relationship with one another. The transmitter is electrically and mechanically coupled to the first portion of the rotary transformer, and the receiver is electrically and mechanically coupled to the second portion of the rotary transformer. The transmitter and the receiver are configured to wirelessly communicate data across the rotary transformer while the first and the second portions of the rotary transformer are in relative rotary motion.
摘要:
A computerized tomography (CT) system having an apparatus and method for receiving high data rate communication is disclosed herein. The apparatus includes a controlled variable attenuator for attenuating an encoded digital data signal having a wide range of power levels, a digital envelope detector for de-encoding the encoded digital data signal, a noise filtering circuit for filtering out the residual undesirable encoded signal components, and a feedback loop for maintaining a desired signal level such that the encoded digital data signal is converted to its pre-encoded state suitable for processing to generate a CT image.
摘要:
Dual control of image level and window of a display is accomplished by rotation of a single trackball. Rotation of the trackball within a first band including the X axis controls one parameter, and rotation of the trackball in a second band including the Y axis controls a second parameter. No changes are made in the parameters in response to rotation of the trackball in a third deadband laying between the first band and second band. The operator of a tomography system can readily change display parameters by rotation of the trackball while viewing the display.
摘要:
A set of two processors operates on image pixel data using polynomial interpolation to generate pixel data for a spatially varied image. Image data is first stored in a buffer memory, and constants used in the polynomial interpolation are stored in a constants memory. One processor operates on the data from the buffer memory using constants from the constants memory, and the interpolated data is then stored in a display memory. The second processor controls the interpolation process by addressing the memories for the retrieval and storage of data.
摘要:
A method for determining a subject's orientation includes receiving, at an imaging system, an input that indicates an orientation of a subject being imaged, automatically determining the orientation of the subject using a feature recognition system, comparing the received input to the automatically determined orientation, and generating an image, the image including orientation indicia based on the comparison. An object orientation recognition system and an imaging system are also described herein.
摘要:
A method and apparatus are provided for minimizing output pulse jitters in a phase locked loop. The method includes pre-setting the digital phase locked loop to a desired frequency, locking the digital phase locked loop to the desired frequency to generate an output signal, and filtering the output signal of the digital phase locked loop to maintain undesirable jitter to an acceptable range. In one embodiment, the apparatus is a medical imaging device. In another embodiment, the apparatus is a baggage imaging device.
摘要:
A method and apparatus are provided for minimizing output pulse jitters in a phase locked loop. The method includes pre-setting the digital phase locked loop to a desired frequency, locking the digital phase locked loop to the desired frequency to generate an output signal, and filtering the output signal of the digital phase locked loop to maintain undesirable jitter to an acceptable range. In one embodiment, the apparatus is a medical imaging device. In another embodiment, the apparatus is a baggage imaging device.
摘要:
A direct electrical connection is provided between transmission line segments of a data slipring and a data acquisition system. A transformer may be provided between the data acquisition system and the transmission line segments for correcting an impedance mismatch between the slipring and the electrical connection. A method of connecting the data slipring with the data acquisition system includes providing a controlled impedance electrical cable between the transmission line segments and the data acquisition system.
摘要:
A computerized tomography (CT) system having an apparatus and method for receiving high data rate communication is disclosed herein. The apparatus includes a controlled variable attenuator for attenuating an encoded digital data signal having a wide range of power levels, a digital envelope detector for de-encoding the encoded digital data signal, a noise filtering circuit for filtering out the residual undesirable encoded signal components, and a feedback loop for maintaining a desired signal level such that the encoded digital data signal is converted to its pre-encoded state suitable for processing to generate a CT image.
摘要:
A serial digital bit signal having signal bits occurring in a bit interval and at a signal bit speed, and each signal bit representing, alternatively, a first logic state and a second logic state, is transferred across a rotating interface by encoding each first logic state bit with a digital radio frequency (RF) carrier signal and coupling the encoded signal across the interface with an RF slipring.