Our goal in this study was to assess the feasibility and safety of performing an intracorporeal laparoscopic jejunal harvest. The initial technique was developed and refined in a pig and then a dog ...model. In the animal studies, careful dissection of the jejunal flap with its feeding vessel was accomplished along with an intracorporeal anastomosis. The laparoscopic dissection was facilitated by temporarily anchoring the jejunal flap to the anterior abdominal wall and transilluminating the mesentery. We present the first case report of a patient who underwent a laparoscopic jejunal harvest, intracorporeal small bowel anastomosis, and a microvascular anastomosis in the neck for reconstruction of the laryngopharynx.
A detection pinhole is used in confocal microscopy to reduce contributions from image planes outside of the focal plane. The size of this pinhole may be varied but the idea of a fixed circular ...aperture is ubiquitous. Here it is shown that an ideal detection aperture varies as a function of the spatial-frequency being imaged. A method for calculating such detection apertures is given, an example calculation is shown and a detector array is suggested as a means to approximate these varying detection apertures
We present a novel method, based on vortex imaging by low-temperature scanning electron microscopy (LTSEM), to directly image the sheet-current distribution in YBa2Cu3O7 dc SQUID washers. We show ...that the LTSEM vortex signals are simply related to the scalar stream function describing the vortex-free circulating sheet-current distribution J. Unlike previous inversion methods that infer the current distribution from the measured magnetic field, our method uses pinned vortices as local detectors for J. Our experimental results are in very good agreement with numerical calculations of J.
A multi-wavelength 3D fluorescence microscope, with transfer functions varying significantly with wavelength, is proposed. This microscope measures multiple wavelengths concurrently and scans through ...the object at a rate significantly below the Nyquist criterion, which gives a reduced image acquisition time. The sub-Nyquist sampling produces a set of images contaminated by aliasing. Due to the differing transfer functions, the aliasing effects are different in each image. This allows the aliasing operator to be inverted and a single unaliased image to be constructed. This is an application of the generalized sampling expansion first introduced by Papoulis. The instrument is demonstrated through simulation and shown to produce images of a similar quality to those that would be expected from a Nyquist-rate instrument.
After preparation of the remanent critical state, the normal component of the local time-dependent magnet field ital Bsub ital z near the surface of a YBasub 2Cusub 3Osub 7minusdelta thin film was ...measured before, during, and after the application of a transport current. The results are shown to be consistent with new calculations of ital Bsub ital z for the thin film geometry. The calculated behavior in a thin film is shown to be substantially different from that of the Bean critical state in a long slab in a parallel field. In slab geometry, starting from the remanent critical state, vert barital J(ital x)vert bar is always equal to ital Jsub ital c, whereas in thin films a continuous distribution of current densities ital J(ital x) is found. This feature results in a unique distribution of the magnetic field ital Bsub ital z and unusual magnetic relaxation behavior in the presence of a transport current.
