摘要:
Disclosed are sources and methods for delivering a radioactive dose to a site in a body lumen. The sources are preferably mounted on a balloon or other expandable or deployable mechanical structure. The source and methods enable delivery of a clinically significant dose of radiation into a vessel wall in a relatively short time while using a relatively low activity. The sources also enable delivery of a substantially uniform dose into the vessel wall, whether or not such delivery is through the wall of a stent.
摘要:
A system and a method for providing a shared augmented reality presentation are disclosed. A group presentation server communicates with one or more wearable computing devices. The group presentation server coordinates the outputs of the various wearable computing devices to present a shared augmented reality presentation to members of group, where every member of the group experiences a unique perspective on the presentation.
摘要:
A brachytherapy treatment device includes at least one tubular insertion member, an expandable member, and means for deflecting the at least one tubular insertion member. The tubular insertion member has a longitudinal axis and proximal and distal ends. The expandable member is disposed on and surrounding the distal end of the tubular insertion member. The distal end of the at least one deflected tubular insertion member within the first expandable member is offset from the longitudinal axis when deflected. The at least one deflected tubular insertion member is configured to receive a radiation source to position a radiation source offset with regard to the longitudinal axis to form an asymmetric radiation dosing profile. Additional brachytherapy treatment devices and methods for forming an asymmetric radiation dosing profile are disclosed.
摘要:
A heat sink (and method of forming a heat sink) is provided that includes a core having a central axis and a plurality of cooling fins arranged about the core. Each fin has a base and a tip. The fins may be shaped to capture a tangential component of air from the fan. At least one portion (such as upper portion) of the fins may be bent. A lower portion of each fin may also be bent.
摘要:
Generally speaking, a system with a metallic component and a thermoplastic component is disclosed. The metallic component may include a metallic outer surface and the thermoplastic component may be formed around the metallic outer surface to create a seal between the thermoplastic housing and the metallic component. In some embodiments, the thermoplastic component may include an inner surface and an outer surface where the inner surface is formed adjacent to an in contact with the metallic outer surface. Embodiments may also include a sealing ring positioned on the outer surface of the thermoplastic housing to provide a compressive spring force to the thermoplastic housing, where the force applied to the thermoplastic housing improves the seal between the thermoplastic component and the metallic component. In a further embodiment, the metallic component is a metallic cold plate and the thermoplastic component is a thermoplastic pump housing. Other embodiments are disclosed and claimed.
摘要:
An electronic assembly comprising one or more high performance integrated circuits includes at least one high capacity heat sink. The heat sink, which comprises a number of fins projecting substantially radially from a core, is structured to capture air from a fan and to direct the air to optimize heat transfer from the heat sink. The heat sink fins can be formed in different shapes. In one embodiment, the fins are curved. In another embodiment, the fins are bent. In yet another embodiment, the fins are curved and bent. Methods of fabricating heat sinks and electronic assemblies, as well as application of the heat sink to an electronic assembly and to an electronic system, are also described.
摘要:
Disclosed is a balloon catheter having an inflatable balloon having a radiation carrier such as a radiation delivery layer thereon. In one embodiment, the radiation delivery layer comprises one or more layers of metal foil, such as gold. The foil is irradiated, and the balloon is thereafter positioned at a treatment site in a vessel and expanded to bring the metal foil layer into close proximity with the vessel wall. In another embodiment, the radiation carrier is in the form of a dopant in the balloon material. Methods of using the balloon include radiation dosing a site following a balloon dilatation or other procedure, and simultaneously performing balloon angioplasty and radiation dosing.
摘要:
Disclosed is a low profile infusion catheter for medical use. The catheter comprises a proximal infusion lumen, which, in one embodiment, branches into two or more distal infusion lumen. Each of the distal fluid lumen is provided with at least one effluent flow port for infusion into the patient. Construction of the catheter provides a series of discrete flexibility zones.
摘要:
Disclosed is a tuvular sheath which is adapted to fit coaxially over an inflatable balloon. The sheath functions to alter the expansion characteristics of the balloon. In one preferred embodiment, the sheath converts the inflation profile of a dilatation balloon from a compliant mode to a noncompliant mode. Advantageously, the balloon sheath may be used in stent placement procedures, to accurately size the stent within a body lumen, while providing protection against balloon rupture. In one embodiment, the balloon sheath comprises a two-layered tubular structure, with an outer elastic layer surrounding an inner inelastic layer. Also disclosed are methods of altering the expansion characteristics of a balloon using the balloon sheath.
摘要:
A method and device that provides independent temperature control of x-ray detector crystals, either singly or in small groups. In addition to a thermal control network for the crystals, electronic devices are associated with each detector crystal and are independently cooled using Peltier devices so that lifetime and reliability are maximized. In most operating environments the ambient temperature is less than the operating temperature of the detector crystals. In these situations, the heat removed from the electronics can be used to heat the detector crystals, resulting in efficient operation.