摘要:
A method of fabricating a catheter shaft having one or more guidewire ports is disclosed. A method in accordance with the present invention includes the steps of cutting the wall of a first shaft portion to create an opening defined by the wall of the first shaft portion, inserting the proximal end of an inner member through the opening defined by the wall of the first shaft portion, inserting the distal end of the inner member into the lumen of a second shaft portion, inserting the bonding end the second shaft portion into a lumen defined by first shaft portion, and bonding the bonding portion of the first shaft portion to the bonding portion of the second shaft portion.
摘要:
In a first aspect, the invention includes a radio frequency photonic transceiver, comprising: a radio frequency receiver; a radio frequency photonic transmitter; and a switch between the input of the radio frequency photonic receiver and the output of the radio frequency photonic transmitter. In a second aspect, the invention includes an apparatus, comprising: a radio frequency photonic receiver; a radio frequency photonic transmitter; and a switch between the input of the radio frequency photonic receiver and the output of the radio frequency photonic transmitter. In a third aspect, the invention includes a radio frequency, photonic transceiver, comprising: means for generating a radio frequency modulated optical signal; a radio frequency photonic transmitter; and means for switching between the input of the radio frequency photonic receiver and the output of the radio frequency photonic transmitter. In a fourth aspect, the invention includes a method, comprising: generating a first optical signal; electro-optically generating a first radio frequency signal from the first optical signal; transmitting the first radio frequency signal; receiving a second radio frequency signal; and electro-optically modulating a second optical signal with the frequency of the second radio frequency signal. In a fifth aspect, the invention includes a zero-intermediate frequency radio frequency photonic transmitter-receiver unit. In a sixth aspect, the invention includes a radio frequency photonic transmitter-receiver unit including a direct conversion receiver with receiver output.
摘要:
A method for determining a target angle. Optical frequency or radio frequency energy is received through a pair of fixed, foreshortened, and opposing subwavelength apertures in a lensing system. A lens of the lensing system positions at least one of the pair of fixed, foreshortened, and opposing subwavelength apertures and includes a dielectric medium, and a substrate encased in the dielectric medium and defining at least one of the pair of fixed, foreshortened, and opposing subwavelength apertures. A target angle is determined from a steep change of amplitude versus angle presented by the pair of fixed, foreshortened, and opposing subwavelength aperture's beamwidth from the received optical frequency or radio frequency energy.
摘要:
In various aspects and embodiments, incident electromagnetic radiation is received through a subwavelength aperture in a lens, the subwavelength aperture being defined by a substrate encased in a dielectric medium.
摘要:
A method and apparatus for finding a relative direction to, a radial speed of, and a distance to a target is described. A laser source illuminates the target and the Doppler shifted return beam is incident upon a window system at an angle and is transmitted therethrough. The magnitude of the transmitted Doppler shifted beam decreases due to Fresnel transmittance. Opposing photomixers then detect this transmitted Doppler shifted beam, thereby creating a pair of detection signals that are mixed with a local oscillator signal. The mixing process creates Doppler frequency signals that are subsequently processed to determine the radial speed of the target. Due to the Doppler frequency component of the signals, objects in the same direction, but moving at different radial speeds, can be discriminated, as the relative direction processing occurs after the Doppler processing.
摘要:
A balloon catheter method of providing same, wherein a balloon catheter defines one or more indentations which provide improved flexibility to at least a portion of the catheter shaft and/or improved folding and rewrapping characteristics to the balloon.
摘要:
The invention relates to a method of creating a curvilinear cavity within a vertebral body or other bony structure. The invention also relates to devices that may be used to perform the steps to create the curvilinear cavity. In one embodiment, a method of forming a curvilinear void in bony structure may include the steps of accessing a bony structure with a cannula, inserting a distal end of a drill device through the cannula and into the bony structure, manipulating the distal end of the drill device to create a curvilinear void in the bony structure, enlarging the void by expansion of a balloon element mounted to the drill device, and deflating the balloon element and removing the drill device from the cannula.
摘要:
A method and apparatus for determining the position of a target are disclosed. The method includes collecting onboard the platform a first set optical radiation in a first bandwidth and a second set of optical radiation in a second bandwidth reflected from a field of view; and determining the position of the target from the difference between the detected first and second sets of optical radiation. The apparatus includes a pair of detection channels a pair of detection channels, each of which further includes at least three optical channels, each detection channel capable of collecting onboard the platform a first set optical radiation in a first bandwidth and a second set of optical radiation in a second bandwidth, respectively, reflected from a field of view. The apparatus further includes a plurality of electronics capable of determining the position of the target from the difference between the detected first and second sets of optical radiation.
摘要:
A signal processing system is disclosed having a detector for detecting an RF signal, wherein the detector has plural detection channels. A modulator modulates an optical signal with the detected RF signal and a processor processes the modulated optical signal to determine an azimuth or an elevation of the detected RF signal.