摘要:
The ultrasound diagnostic apparatus, ultrasound image generation apparatus and method transmit ultrasound waves to a subject into which a puncture tool is inserted, receive reflected waves reflected from the subject and the puncture tool, and generate echo signals of time-sequential frames based on the received reflected waves, and generate an ultrasound image of the subject based on the generated echo signals. These apparatus and method generate a differential echo signal between time-sequential frames from the echo signals, perform a tip detection process based on the differential echo signal to thereby detect at least one tip candidate including a tip end of the puncture tool, highlight a tip candidate of the puncture tool detected to thereby generate a tip image, and display the tip image of the highlighted puncture tool so as to be superimposed on the generated ultrasound image.
摘要:
An ultrasound diagnostic apparatus includes plural ultrasound transducers which perform transmission and reception of ultrasonic waves toward a target site of a subject containing a puncture needle. A method of transmitting and receiving an ultrasonic wave uses the ultrasound transducers. The apparatus and the method form an ultrasonic beam to be transmitted from a transmit aperture set on the ultrasound transducers, acquire information relating to a specular-reflective component of the ultrasonic beam in the puncture needle, set a first receive aperture different from the transmit aperture set on the ultrasound transducers on the basis of the information relating to the specular-reflective component of the ultrasonic beam, and process an ultrasonic echo signal received by the ultrasound transducers using the first receive aperture.
摘要:
An ultrasound diagnostic apparatus includes: an ultrasound probe including a plurality of ultrasound transducers; a device for determining optimum sound speed values at a lattice point set in a shallower region than a region of interest (ROI) and in the ROI on the basis of an ultrasound detection signal outputted by the ultrasound probe; a device for arithmetically operating a received wave received from the ROI on the basis of the optimum sound speed value; a device for setting an assumed sound speed in the region of interest, obtaining a received wave received from each lattice point on the basis of the assumed sound speed and the optimum sound speed value at the lattice point, and synthesizing received waves at lattice points to obtain a resultant received wave; and a device for determining a local sound speed value in the ROI on the basis of the received wave and the resultant received wave.
摘要:
There has been a demand to accelerate image data conversion through the use of the error diffusion method. To convert image data, it is determined whether a specified block process condition is satisfied on the basis of a gradation value for each pixel in a target block. When the block process condition is true, a process is performed to diffuse a gradation error for the entire target block and convert image data for pixels in the target block at a time. Even when the block process condition is false, it is determined whether to form a dot in the target block. When it is determined that no dot should be formed, a process is performed to diffuse a gradation error for the entire target block to the unconverted pixels in another block and convert image data for pixels in the target block.
摘要:
To process image data representing images comprising a plurality of pixels, image data specifying a forming state of dots for each pixel is retrieved, the dot configuration data representing the configuration of dots recorded on a printing medium is retrieved, and recording state data representing the recording state of the dots formed by the image data on the subpixel plane formed by subpixels that are smaller than the pixels is created.
摘要:
To obtain ambient sound velocity of a subject with high accuracy in a ultrasonic diagnosis apparatus. In an ambient sound velocity obtaining method that transmits ultrasonic waves from an ultrasonic probe, receives reflected waves reflected by a subject to obtain received signals, performs a receive focusing process on the received signals using receive delay times based on a plurality of sound velocity settings to obtain in-phase sum signals with respect to each sound velocity setting, and obtains an ambient sound velocity of the subject based on the in-phase sum signals with respect to each sound velocity setting, the in-phase sum signals with respect to each sound velocity setting is separated into an in-phase sum signal corresponding to a boundary portion in the subject and an in-phase sum signal corresponding to portions other than the boundary portion, an index is obtained based on at least either one of the in-phase sum signals, and the ambient sound velocity is obtained based on the index.
摘要:
A spectral printing model converter is used to convert ink amount data to spectral reflectance of a color patch to be printed according to the ink amount data. A plurality of sample ink amount data each representing a set of ink amounts of plural inks is provided, and each sample ink amount data is converted into spectral reflectance of a virtual sample patch to be printed with the ink amounts represented by the sample ink amount data using the spectral printing model converter. An evaluation index is calculated for each sample ink amount data, where the evaluation index includes a color difference index and an image quality index of the virtual sample patch to be printed according to the sample ink amount data. The color difference index represents a color difference between a sample color which is calculated from the spectral reflectance and a comparative color which is selected as a basis for comparison. Plural sample ink amount data is then selected based on the evaluation index, and a profile defining correspondence between calorimetric value data and ink amount data is produced based on the selected plural sample ink amount data.
摘要:
An ultrasonic diagnosis apparatus comprising: an ultrasonic probe which includes a plurality of ultrasonic transducers which transmit ultrasonic waves to an object, receive the ultrasonic waves reflected by the object, and output ultrasonic detection signals; a reception time calculating device which calculates at least one of a reception time and a reception wave at each of elements corresponding to lattice points set in a shallower region than a region of interest in the object; an image generating device which generates an image at a lattice point in the region of interest, based on a hypothetical sound velocity set in the region of interest and the calculated one of the reception time and the reception wave; an image analyzing device which analyzes the generated image; and a local sound velocity calculating device which calculates a local sound velocity in the region of interest, based on a result of the image analysis.
摘要:
In an ultrasound diagnosis, the inventor has found a characteristic that coincidence of RF data after matching addition or amplitude image data at the small opening are different between those of an isolated point (minute structure), a continuous surface, and a speckle. On the basis of the characteristic, an ultrasound diagnostic apparatus and method which can distinguish and extract the isolated point, the continuous surface, and the speckle and determine a tissue property are provided.
摘要:
The invention provides a dither matrix generating method. This method generates a dither matrix for determining a status of dot formation on each of print pixels of a print image to be formed on a print medium in response to input image data. The method comprising: determining a targeted threshold value from among a plurality of threshold values, the targeted threshold value having a highest tendency for dot formation to be On among threshold values for which storage elements are to be determined; determining a storage element for the targeted threshold value from among a plurality of candidate storage elements based on a matrix evaluation value, the matrix evaluation value representing a correlation with a prescribed objective state, the matrix evaluation value being calculated respectively on a presupposition of hypothetical dot On/Off states, the hypothetical dot On/Off states resulting from the targeted threshold value being stored in each of the plurality of candidate storage elements that are candidates for storing the targeted threshold value; and repeating the determining the targeted threshold value and the determining the storage element for at least part of the plurality of threshold values. The determining the storage element includes: extracting an element block that constitutes a group of the storage elements, the element block making up a part of the dither matrix; and selecting the candidate storage elements in succession from among the plurality of storage elements that make up the extracted element block.