RESULTS The sensitivity of the aperture described is about 30 times that of the standard
Nuclear-Chicago pin hole collimator. This factor is just the ratio of the aperture areas and has …

We have recently developed a digital x-ray image receptor for use in mammographic procedures.
The detector is based upon a photoconductor, amorphous selenium (a-Se), coupled to …

Piezoelectric biosensors usually employ quartz crystals, either as resonating crystals (quartz
crystal microbalance), or as bulk or surface acoustic wave devices. Their action depends on …

Ionography, which is currently receiving much attention, is an x-ray image recording system
in which the detector is a thin ionization chamber usually containing a heavy, high pressure (…

Ionography, which is currently receiving much attention, is an x-ray image recording system
in which the detector is a thin ion-ization chamber usually containing a heavy, high pressure (…

The important feature that separates a biosensor from any other transducer is the specificity
imparted to it by the incorporation of a biologically active material on to the sensing surface. …

Exploration of a gravimetric sensor based on acoustic-wave transmission across thin polymer
filters is described. The transit time of the acoustic waves passing across the polymer filters …

In ionographic imaging, the ions produced in a high‐pressure, high‐Z gas are normally collected
on an insulating foil. If a deformable dielectric gel is used as a collecting electrode, then …

There is much interest in visualizing dynamic physiological function using nuclear‐medicine
techniques. In particular, these methods are used in cardiac studies, but it is likely that many …

An inexpensive isodose plotter is described which uses major items already present in most
radiology departments. A rectilinear scanner provides scanning motions and plotting table …