摘要:
Disclosed is a polymer composition derived from a bis-phenol comprising a conjugated aromatic radical, optionally comprising nitrogen. Suitable bis-phenols as well as methods for making said polymer are also disclosed. Also disclosed are electroactive layers comprising said polymer and electroactive devices comprising said layer.
摘要:
A correlation confocal microscope uses correlated photon pairs to improve resolution. It employs a source of a light beam converging to a point location on a sample, and an objective that gathers light from the point location and generates an image beam. A modulator applies a spatial pattern of modulation to the source light beam to define spatially correlated photons whose spatial correlations are preserved in modulated light gathered from the sample. A filter applies a modulation-selective filter function to the image light beam to generate a filtered light beam of like-modulated photons. A coincidence detector detects temporally coincident photon pairs in the filtered light beam, generating a pulse output that indicates the magnitude of a light-detectable property (such as transmissivity or reflectivity) of the sample at the point location. The modulator may apply phase modulation and the filter may be a phase-sensitive component such as an interferometer.
摘要:
A method and apparatus for registering physical space to image space is disclosed. The system allows for determining fiducial markers as pixels or voxels in image data. The system can correlate and register the determined fiducial points with fiducial markers in physical space.
摘要:
A representation of a prosthesis opening is created and a device having a marker is tracked through the opening while monitoring the relative positions of the opening representation and the marker on a display. In one alternative, a representation is made on a display of the center of the contralateral stump opening and an electromagnetic marker coil that is secured to an endovascular delivery device, and the marker and delivery device are guided into the opening, while monitoring the relative positions of the opening center and the electromagnetic marker coil representations. In another alternative, one or more markers are positioned in the vicinity of the prosthesis opening and a device having a marker is tracked to the one or more markers and through the opening where the device is one of a guidewire and a catheter, while monitoring the relative position of the markers on a display.
摘要:
A method and apparatus for registering physical space to image space is disclosed. The system allows for determining fiducial markers as pixels or voxels in image data. The system can correlate and register the determined fiducial points with fiducial markers in physical space.
摘要:
A branch vessel in a human patient is located using in vivo tracked field sensors where in one variation the sensor positions can be located by determining the positions of the sensors relative to a plurality of magnetic field sources of known location. This approach is used, for example, in locating the opening in a renal artery and positioning the proximal end of the AAA stent-graft adjacent to the opening. According to another embodiment, field sensors in combination with signal generators are placed in vivo to locate vasculature aspects. In a further embodiment, an in vivo sensor is positioned in a deployed prosthesis to create a reference for a prosthetic member having a sensor to track to during cannulation of the deployed prosthesis with the prosthetic member.
摘要:
The present invention relates to novel compositions, methods and therapeutic uses for nalmefene, a unique opioid antagonist drug. The invention teaches administering nalmefene by means that function to produce optimal steady-state plasma or serum concentrations. These means plus functions are claimed for treating alcoholism and pathological gambling.
摘要:
A communication system including a personal communication device that allows a user to communicate over the Internet with a network of multiple remote databases and to search the databases for desired product-related information from any location. The communication device includes an input mechanism, such as a bar code scanner or OCR reader, for entering product information such as product codes from product labels. The communication device establishes a communication link with a communications server, and the product information is transmitted to the server, which interfaces with one or more product information libraries to determine a product identifier based on the input product information. The product identifier is used by the server to search various databases over the Internet for desired product-related information in response to a search query from the user.
摘要:
An air management system for improved airflow within a vehicle carburetor or fuel injection throttle-body. The air management system comprises a divider plate positioned within the airflow passage of the carburetor or fuel injection throttle body. Several embodiments utilize air pressure equalizing apertures for equalizing fluid pressures above and below the divider plate.
摘要:
A method and apparatus for electromagnetic navigation of a surgical probe near a metal object. The electromagnetic navigation system includes a transmitter coil array and a shield. The transmitter coil array has a plurality of transmitter coils and is operable to generate the electromagnetic field to navigate the probe. The shield is positioned adjacent the metal object and is operable to shield the metal object from the electromagnetic field generated by the transmitter coil array, such that the shield substantially reduces distortion of the electromagnetic field by the metal object.