摘要:
An optical pick-up device includes a light source for irradiating a recording medium to record and/or reproduce information, an objective lens for condensing beams of the light which are reflected or transmitted by the recording medium, an optical member such as a parallel plane plate or a diffraction grating for imposing a diffraction pattern upon the condensed light, and a photo detector for detecting the presence and amount of the patterned light in each of a plurality of regions. The regions on the photo detector correspond to those created by lines curved in accordance with a comatic aberration of the optical member. In particular, the curved lines correspond to the projection of first and second rectilinear lines through the objective lens and the optical member onto the photo detector. The first rectilinear line is parallel to a track on the recording medium, and the second rectilinear is perpendicular to the track.
摘要:
In a compatible recording and reproducing apparatus which is capable of recording and reproducing information on both a video disk and a digital audio disk, a relative angle between an optical axis of a laser beam emitted from a pickup and the disk is adjusted so as to be suitable for the disk loaded on the apparatus. Further, the movement of the pickup in the radial direction of the disk is regulated in accordance with the difference in the outer diameter of the two kinds of disks. A problem due to the difference of the track pitch in the two kinds of disks is solved by moving the pickup in a direction perpendicular to a radial direction of the disk. In addition, an objective lens for focusing the laser beam on the disk is selected within a predetermined range of an effective numerical aperture in order to simplify an optical system of the apparatus.
摘要:
In an NMR diagnostic apparatus, it is generally necessary to tune a receiver tuning unit with respect to a patient. The NMR diagnostic apparatus is comprised of a standard signal generator for generating a CW signal, a receiver tuning unit which is mainly constructed by a receiver probe head and a series circuit of a capacitor and a variable capacitance diode and receives the NMR signals induced from the CW signal, quadrature detectors which detect the NMR signals, and a signal processor which processes the detected NMR signals so as to produce the control voltages "Vc". The automatic tuning operation is carried out in such a manner that varying the control voltage "Vc" which is applied to the variable capacitance diode enables the receiver tuning unit to be tuned with respect to the object that is positioned in the receiver probe head.
摘要:
An image processing method generates two-dimensional images, each of which are respectively in accordance with left and right breasts of a subject using three-dimensional image data of the left and right breasts. A comparison two-dimensional combined image is generated, wherein the left and right breast images are disposed symmetrically. The comparison two-dimensional combined image is displayed on a display unit.
摘要:
A method for producing a near-field optical device is provided with: a step for forming a near-field light generation unit (10) on one surface of a transparent substrate (32); a step for forming a light source (20); and a step for adhering the transparent substrate on which the near-field light generation unit is formed, with the light source. Thereby, a method for producing a near-field optical device suited for mass production can be provided.
摘要:
A recording apparatus records information onto a recording medium. The recording apparatus is provided with: a near-field light device; and a control unit for controlling the near-field light device. The near-field light device is provided with: a light source; a quantum dot structure which is laminated on the light source; a plurality of quantity dots which are included in the quantity dot structure and each of which generates near-field light on the basis of light emitted from the light source; and an output end which is configured to output at least one portion of energy of the near-field light to the exterior of the quantity dot structure. The control unit of the recording apparatus controls the light source to emit the light upon recording the information, thereby increasing temperature of a region of the recording medium based on a size of the output end.
摘要:
An ECG-prep scan is used to set an optimum time phase in both systole and diastole of the heart. At each of the different time phases, an imaging scan is started to acquire a plurality of sets of echo data. An artery/vein visually separated blood flow image is produced from the echo data. The imaging scan uses a half-Fourier technique, for example. This provides high-quality blood flow images with shorter scan time, without injecting a contrast medium. Additionally, with a readout gradient pulse applied substantially parallel with a direction of slowly flowing blood, a scan is performed in synchronism with an optimally determined cardiac time phase. The readout gradient pulse has a dephasing pulse for enhancing differences in a flow void effect depending on blood flow velocities. This enables slow-speed flows, such as blood flows in the inferior limb, to be depicted without fail.
摘要:
A magnetic resonance imaging apparatus includes a first blood flow image acquisition unit and a second blood flow image acquisition unit. The first blood flow image acquisition unit acquires a first blood flow image of a breast of an object without contrast medium. The second blood flow image acquisition unit acquires a second blood flow image without contrast medium with applying a spin labeling pulse by which a region to be tagged is set based on the first blood flow image as a reference image so as to distinguish blood flowing into a desired region.
摘要:
A magnetic resonance imaging apparatus includes a movement unit which moves a subject placed in a static magnetic field, a collector which collects data corresponding to a magnetic resonance signal emitted from the subject, a detector which detects a position of a particular section of the subject in the static magnetic field, a reconstruction unit which reconstructs an image, based on the collected data, when the detected position falls within an allowable area, and a controller which controls the movement unit to compensate for a deviation of the detected position from a reference position.
摘要:
The Pyrazolo[1,5-a]pyrimidine derivatives represented by formula I and their pharmaceutically acceptable salts exhibit excellent kinase inhibiting activity. Drugs comprising the compounds as effective ingredients are therefore expected to be useful as therapeutic or prophylactic agents for a protein kinase mediated disorder in which kinase is implicated, such as inflammatory disease, autoimmune disease, destructive bone disorder, cancer and/or tumour growth.