Abstract: The center of tissue within a patient to be subjected to radiation treatment is located in terms of coordinates with respect to a predetermined origin defined by three mutually orthogonal reference axes. Projections of at least one of the axes are superimposed upon two radiographs in different radiographic planes showing the tissue center and surrounding features in enlarged dimensions. In order to determine the reduced, true coordinates of the tissue center in cases where frontal and lateral radiographs are obtained, one method is disclosed in which analytic geometry is applied to reduce the values of the projected coordinates. Reduction factors for the two radiographs are also ascertained so that the actual length, width and breadth of the treatment volume may be calculated.

Abstract: An optical fiber ribbon structure is formed by enveloping a plurality of optical fibers with a predetermined spacing between two laminate elements spaced in parallel array. Once formed, either element can be peeled back from the other end from the fibers to expose fibers for subsequent splicing. The forming process embodies the fibers equally in each laminate, forming semicircular grooves in each. These become guide channels for splicing.

Abstract: A processor for developing films and more particularly films of the diazo type in which the film and material to be copied are wrapped around a transparent drum and the film is developed by a light of the proper wavelength whose energization is periodically controlled.

Abstract: A method of recording an electrostatic charge pattern representing information to be recorded and generated in the interior of an air-tight envelope or chamber comprising a target towards which charged particles are projected, characterized in that the electrostatic charge pattern is produced within the envelope on an electrically insulating surface of a charge receiving material and (1) according to a first mode the charge pattern from such surface is transferred through an array of closely spaced solid conductors, held a solid electrically insulating matrix, to an uncharged electrically insulating surface of an other charge receiving material removably positioned at the outer side of the envelope or (2) according to a second mode the charge pattern from such surface is transferred through said conductors to an oppositely charged electrically insulating surface of a charge receiving material removably positioned at the outer side of the envelope forming according to the second mode a charge pattern in accord

Abstract: The present invention relates to an atmospheric pressure quadrupole mobility spectrometer for detecting and identifying trace amounts of various molecular species present in a gas. The invention includes an outer housing comprising forward and rear sections which define forward and rear chambers. The gas under analysis is caused to flow into the inlet part of the forward section where ionizers mounted around the circumference of the forward chamber convert a portion of the molecular species present in the gas into stable molecular ions suitable for analysis. Towards the center portion of the forward chamber a carrier gas is mixed with gas and ions so formed. Four parallel, cylindrical electrodes symmetrically positioned about the longitudinal axis of the rear chamber are connected in opposing pairs to a bipolar power supply which supplies a predetermined repetitive voltage waveform to the electrodes thereby creating a generally hyperbolic electric field between the electrodes.