A stereotactic X-ray mammograph incorporating a biopsy needle has a table with a central aperture 35 through which a prone patient's pendulant breast is exposed to a horizontal beam of X-rays from a source 28C. The source 28C is mounted at one end of C-arm 27 which pivots about an axis 29 and carries at its other end an image receptor 36, which may be a film or a phosphor screen/CCD camera. The br...

The biopsy table (21) includes a platform (22), on which the patient lies in a prone position with the breasts passing through an aperture (37). An image receptor (36) is mounted on a C-arm (27) and can be rotated about an axis (29) able to be positioned between the patient`s breasts or against the underside of a breast. A tube-head (28) which delivers X-rays to the patient is positioned at the pa...

Biphenyl tetracarboxylic acid esters and derivatives thereof are prepared by the coupling reaction of 4-halogen substituted o-benzenedicarboxylic acid ester, carried out in an aprotic polar solvent in the presence of a pre-prepared triphenylphosphine-nickel chloride or trialkylphosphine-nickel chloride catalyst, zinc powder as the reducing agent, and an alkali metal halide promoting agent. The est...

The utility model relates to a parasol type range device, particularly a portable parasol type range device which is suitable for cooking and drinking in the field. The inner surface of the parasol cloth on the main body parasol of the device is stuck with or coated with a layer of metallic reflection film; when the parasol cloth is pushed off, the reflection ray of the parasol cloth can be conver...

The utility model relates to a solar water heater which can solve the problems of topographic feature and environment. The utility model comprises a water storage device, a safety valve, a water drain port, a water inlet port, a hot water outlet port, an electric heater connecting pipe, a sealed screw cap and fixing parts. The utility model is characterized in that the water storage device is prov...

This invention relates to rigid closed-celled polyisocyanate-based foams exhibiting improved dimensional stability and a process for their preparation. In particular, it relates to resulting foams containing within their cells, a gas mixture comprising from 15 to 70 mole percent carbon dioxide and from 30 to 85 mole percent of a halocarbon mixture. The halocarbon mixture itself, comprises (a) from...

PCT No. PCT/DE94/00710 Sec. 371 Date Jun. 17, 1996 Sec. 102(e) Date Jun. 17, 1996 PCT Filed Jun. 18, 1994 PCT Pub. No. WO95/01270 PCT Pub. Date Jan. 12, 1995A windshield wiper arrangement which includes a windshield having a wiping area and a sensor-active surface on its wiping area. A wiper sweeps over the wiping area during a wiper operation. A wiper control system includes: a drive motor for dr...

Microvoid polyurethane materials having densities below 300 kg/m<3> and void sizes below 5 micron which are suitable for use as insulating filler in evacuated insulation panels.

A proximity sensor which has planar magnetoresistive elements lying in the plane of a radial magnetic field. The magnetoresistive elements arranged in a bridge configuration and are magnetically saturated by the radial magnetic field. The proximity sensor detects the approach of a ferromagnetic object by detecting movement of the effective center of the radial magnetic field.