Aloka Co. | Date: 2011-02-16
A 2D array transducer (10) is separated into a plurality of sub-arrays. Four representative sub-arrays from SA1 to SA4 are shown in an enlarged manner. In addition, the 2D array transducer (10) is segmented into a plurality of transducer regions. Four regions of (I) - (IV) segmented by dot-and-chain lines represent four transducer regions. For each sub-array, a delay process corresponding to the sub-array is executed based on a delay pattern defining an amount of delay for each of the plurality of transducer elements belonging to the sub-array. In this process, for each transducer region, a common delay pattern is set for the plurality of sub-arrays belonging to the transducer region. For example, because sub-arrays SA1 and SA2 belong to the same transducer region (IV), a common delay pattern is set for the sub-arrays SA1 and SA2.
Kume and Aloka Co. | Date: 2011-06-22
A free-moving piece (jellyfish sign) having a high probability of separation in the near future in an unstable plaque is clearly displayed. Ultrasonic tomographic images (25) of a cross section including an axis of the carotid artery are successively obtained. Using a threshold value which sets a surface (48) of the unstable plaque as a boundary between brightness and darkness, the plurality of ultrasonic tomographic images (25) are binarized. A difference is calculated between corresponding pixels of two binarized ultrasonic tomographic images so that a free-moving piece (52) is extracted and displayed overlapped over the ultrasonic tomographic image (25).
University of Tokyo and Aloka Co. | Date: 2011-04-20
Provided is a bone inspecting system for placing the lower legs (L) of an examinee (P) on a proximal support block (26) and a distal support block (28) mounted on a turning base (24). The proximal support block supports the heads of fibula, and the distal support block supports the lateral malleolus or medial malleolus of a tibial distal end of the examinee. The turning base is supported turnably on a turning axis positioned near the knees of the examinee, with respect to a main base (22), and is moved up and down by an elevating mechanism (30) disposed near the ankles. The turning base (24) is turned by the elevating mechanism while bearing the lower legs thereon, thereby positioning the lower legs horizontally.
Aloka Co. | Date: 2011-05-18
CT imaging is performed twice (S1101), which is set as the normal number of rotaions, and a sinogram is corrected (S1102) based on the sinogram obtained by performing CT imaging twice. Since the cycles of data variation caused by respiration are controlled so as not to overlap one another, usually the data variations caused by respiration are eliminated by performing CT imaging twice. However, depending on irregularity in the respiration cycle of the subject, data variation components sometimes overlap at the same angle in spite of the fact that the cycles of data variation caused by respiration are controlled so as not to overlap one another. Therefore, when data variation components remain overlapped at the same angle, CT imaging is performed one additional time (S1104) and the sinogram is corrected (S1102) using the sinogram obtained by performing the additional CT imaging.
Aloka Co. | Date: 2011-04-20
An ultrasonic volume data processing device which forms a three-dimensional image of a target tissue in a living body is provided. A range in which a rendering process is applied is limited by a three-dimensional region of interest (3D-ROI). The three-dimensional region of interest has a clipping plane as a rendering start surface. A shape of the clipping plane can be deformed into a convex shape or a concave shape by a user operation, and the clipping plane may be freely inclined in two-dimensional directions. With this configuration, for example, the clipping plane can be suitably positioned in a gap between a face of a fetus and a placenta. When the curved clipping plane is used, a striped pattern noise tends to be formed in the three-dimensional image. In order to resolve or reduce the striped pattern noise, a special voxel calculation is applied to a final voxel of each ray in the voxel calculation for each ray.
Aloka Co. | Date: 2011-02-23
A 2D array transducer (10) is separated into a plurality of sub-arrays. Four representative sub-arrays SA1 to SA4 are shown in an enlarged manner. In addition, the 2D array transducer (10) is segmented into a plurality of transducer regions. Four regions of (I) - (IV) segmented by dot-and-chain lines represent four transducer regions. A grouping process is executed for each sub-array to group the plurality of transducer elements belonging to the sub-array into a plurality of element groups. In this process, for each transducer region, a common grouping pattern is set for the plurality of sub-arrays belonging to the transducer region. For example, because sub-arrays SA1 and SA2 belong to the same transducer region (IV), a common grouping pattern is set for the sub-arrays SA1 and SA2.
Aloka Co. | Date: 2011-01-26
In a transportable ultrasound diagnostic apparatus, a body to which a display unit on which an ultrasound image is displayed is integrated and an operation panel are connected by a connecting member. The body and the operation panel are supported by a body supporting stub and an operation panel supporting stub, which are separate supporting stubs, on the connecting member in a pivotable manner around center axes of the supporting stubs. The ultrasound diagnostic apparatus is used in an open state in which the operation panel is pulled down to the front side. The operation panel is pivoted to close with the body, resulting in a storage state.
University of Tokyo and Aloka Co. | Date: 2011-08-17
An ultrasonic beam (40) for echo tracking is formed for a healthy portion (52a) of a bone (50) containing healthy portions (52a, 52b) and a fractured portion (54). Echo tracking processing is executed over the state where a load F is not applied to the bone (50) and the state where the load F is applied to the bone (50) so as to calculate a distortion amount of the bone (50) accompanying the load F via the ultrasonic beam (40) formed for the healthy portion (52a). The state of union of the fractured portion (54) is evaluated in accordance with the distortion amount obtained via the healthy portion (52a).
Aloka Company | Date: 2011-04-15
The present disclosure relates generally to equipment and procedures in the field of surgery and/or diagnostics and, more particularly, to instruments, systems, and methods for undertaking surgical and/or diagnostic procedures that involve and/or are in proximity to the brain, e.g., cranial procedures and/or surgery. The disclosed devices generally include a handle member and an elongated probe that includes an ultrasound transducer. The devices may be used in conjunction with K-wires/guidewires, tubular members, e.g., EVD catheters and/or ventricular drains, endoscopes/cameras, and accessory items such as curettes, probes, knives, suction devices, scissors, cautery units, forceps, grasping devices and the like.
Yamaguchi University and Aloka Co. | Date: 2011-03-01
An ultrasonic diagnostic apparatus which can measure a time difference of motion between a plurality of sites of a cardiac muscle for the heart of a fetus is provided. On a tomographic image of the heart, a user sets a plurality of observation points. Each observation point is tracked, and a plurality of displacement waveforms representing a temporal displacement of the plurality of observation points are generated. A time difference between a plurality of representative points is calculated between the plurality of displacement waveforms. Such a time difference is displayed as a numerical value or as a graph. The representative point is a peak point, a zero-cross point, an inflection point, or the like. The plurality of observation points are set along conduction pathways in the heart for the electric signal.