Abstract: A method and device for determining the depth and fluorophore concentration of a fluorophore concentration below the surface of an optically absorbing and scattering medium suitable for use in fluorescence-based surgical guidance such as in tumor resection is described. Long-wavelength stimulus light us used to obtain deep tissue penetration. Recovery of depth is performed by fitting measured modulation amplitudes for each spatial frequency to precomputed modulation amplitudes in a table of modulation amplitudes indexed by optical parameters and depth.

Abstract: A connector component for computer units and peripheral units is secured to the back of each unit and enables the units to be stacked together in direct electrical connection, without the need for cables between them. Each connector component includes a pair of swivel mounts which rotate through 90 degrees and support a multi-contact pin connector, so that each connector can be oriented either vertically or horizontally, toward the rear of the unit. The pin connectors are internally connected to the operable portions of each unit by an internal cable bus. For direct interconnection between units, the adjacent swivel mounts are rotated to the vertical position and mated. At the top and bottom of a vertical stack of units, the extreme upper and lower swivel mounts may be rotated to the horizontal, rearward-facing position for connection to a cable leading to other computer or peripheral units remote from the stack.

Abstract: A portable computer is contained within an outer metal case which physically encapsulates and protects the working components of the computer in the closed, portable configuration. The metal case includes a base which serves as a heat sink for transferring waste heat from heat producing electrical components to the surroundings in the open, operating configuration of the computer. The heat producing components are mounted and located in the base to maximize the transfer of heat to the base. A display housing is pivotally mounted on the base by hinge assemblies for swinging movement between a closed and latched position on the base and an upward and rearwardly inclined angle for viewing by an operator positioned in front of the computer. Stop pins coact with the hinge assemblies for holding the display housing at the desired angle of view, and torsion springs are associated with the hinge assemblies for preventing inadvertent slamming of the display housing against the base during closing.