scholarly journals PROCESSING AND DISPLAY OF DIGITIZED MEDICAL IMAGES : SPECIAL REFERENCE TO THE MATRIX COUNT AND PIXEL SIZE AT DIGITIZATION

1987 ◽  
Vol 43 (12) ◽  
pp. 1728-1733
Author(s):  
YASUHIKO TOHYAMA ◽  
NAOKI AKAGI ◽  
YOSHIHIKO KUBO ◽  
NOBORU YAMAMOTO ◽  
TAKASHI HATAKEYAMA ◽  
...  
Keyword(s):  
Special Reference ◽  
Medical Images ◽  
Pixel Size ◽  
The Matrix

scholarly journals A method of quasi-continuous image formation in observation devices with discrete receivers

2021 ◽  
Vol 8 (2) ◽  
pp. 4-11
Author(s):  
Mykhailo Slonov ◽  
Oleksandr Maryliv
Keyword(s):  
Image Formation ◽  
Effective Area ◽  
Horizontal Distance ◽  
Object Image ◽  
Continuous Image ◽  
Pixel Size ◽  
Matrix Surface ◽  
The Matrix ◽  
Video Format ◽  
Observation Results

The article proposes a new method of quasi-continuous image formation in observation devices with discrete receivers. The increase in the number of spatial sampling points in the object image is provided by intraframe scanning. Scanning is carried out by a photosensitive matrix with a regularly changed (controlled) density of the elementary receivers (CDR-matrix). The CDR-matrix contains identical elementary receivers. They are regularly distributed over the matrix surface. The vertical and horizontal distance between adjacent receivers is a multiple of the size of the elementary receiver. The CDR-matrix becomes equivalent in pixel dimensions to a larger photosensitive matrix. The magnitude of the multiplicity placement of the receivers is chosen by the developer when designing the light-sensitive matrix. The image of the object by the CDR-matrix (a separate frame) is composed of a series of snapshots. Each snapshot is formed by signals coming from all elementary receivers of the CDR-matrix. The number of snapshots in the frame is set by the multiplicity of the size of the elementary receivers vertically and horizontally. While using intraframe scanning, the CDR-matrix with a pixel size of the video format can operate in the mode of a photosensitive matrix with a pixel size of 2.5 MP. A CDR-matrix with a pixel size of 6 MP can operate as a 48 MP matrix of a conventional design. A mechanism for storing a frame with observation results when using a CDR-matrix is proposed. It assumes the use of the matrix addition operation. The signal matrix of the observed frame is considered as the sum of the signal matrices of all the snapshots in the frame. Application of the developed method will make it possible to multiply the pixel size of the image relative to the pixel size of the controllable photosensitive matrix. The advantages of the proposed method also include the absence of a mandatory decrease in the effective area of an elementary receiver with an increase in their number in the photosensitive matrix; simplification of hardware measures to reduce the effect of image shift on its quality; absence of information losses in the intervals between adjacent elementary receivers.

Medical Visualizer 3D: Hardware Controller for Dmd Module

2014 ◽  
Vol 19 (2-3) ◽  
pp. 15-23
Author(s):  
Sebastian Koryciak ◽  
Maciej Barszczowski ◽  
Agnieszka Dąbrowska-Boruch ◽  
Kazimierz Wiatr
Keyword(s):  
Reverse Engineering ◽  
Digital Imaging ◽  
Medical Images ◽  
Functional System ◽  
Three Dimensions ◽  
Engineering Studies ◽  
The Matrix ◽  
Projection Surface

Abstract In this paper an implementation of the module responsible for the control of micro-mirror array for later use in projection is described. Existing technologies allow for projections of medical images in Digital Imaging and Communications in Medicine format only in the form of a flat 2D image. The 3D Visualizer will allow to display medical images in three dimensions using its own projection surface. The matrix controlling device has been largely developed on the basis of reverse engineering studies carried out on the functional system based on a driver from Texas Instruments. Driver is built on the FPGA with implemented soft processor from Xilinx - MicroBlaze.

scholarly journals Admissible Perturbation of Demicontractive Operators within Ant Algorithms for Medical Images Edge Detection

Mathematics ◽  
2020 ◽  
Vol 8 (6) ◽  
pp. 1040
Author(s):  
Cristina Ticala ◽  
Ioana Zelina ◽  
Camelia-M. Pintea
Keyword(s):  
Edge Detection ◽  
Medical Images ◽  
Positive Influence ◽  
Edge Information ◽  
Admissible Perturbation ◽  
The Matrix ◽  
Image Edge ◽  
Demicontractive Operator ◽  
Artificial Pheromone

Nowadays, demicontractive operators in terms of admissible perturbation are used to solve difficult tasks. The current research uses several demicontractive operators in order to enhance the quality of the edge detection results when using ant-based algorithms. Two new operators are introduced, χ -operator and K H -operator, the latter one is a Krasnoselskij admissible perturbation of a demicontractive operator. In order to test the efficiency of the new operators, a comparison is made with a trigonometric operator. Ant Colony Optimization (ACO) is the solver chosen for the images edge detection problem. Demicontractive operators in terms of admissible perturbation are used during the construction phase of the matrix of ants artificial pheromone, namely the edge information of an image. The conclusions of statistical analysis on the results shows a positive influence of proposed operators for image edge detection of medical images.

scholarly journals Fractal Analysis of Trabecular Architecture : With Special Reference to Slice Thickness and Pixel Size of the Image

2005 ◽  
Vol 61 (6) ◽  
pp. 819-825
Author(s):  
TATSUSHI TOMOMITSU ◽  
HIROAKI MIMURA ◽  
KENYA MURASE ◽  
TSUTOMU TAMADA ◽  
TERUKI SONE ◽  
...  
Keyword(s):  
Special Reference ◽  
Fractal Analysis ◽  
Slice Thickness ◽  
Trabecular Architecture ◽  
Pixel Size

Thin Film on Asic - A Novel Concept for Intelligent Image Sensors

1992 ◽  
Vol 258 ◽  
Author(s):  
H. Fischer ◽  
J. Schulte ◽  
J. Giehl ◽  
M. Böhm ◽  
J. P. M. Schmitt
Keyword(s):  
Integrated Circuit ◽  
Crystalline Silicon ◽  
Random Access ◽  
Image Sensors ◽  
Contour Extraction ◽  
Pixel Size ◽  
Switching Transistor ◽  
Pixel Detectors ◽  
The Matrix ◽  
Novel Concept

ABSTRACTTwo different pixel detectors have been fabricated, each of them consisting of an a-Si:H based photodiode layer on top of a crystalline silicon integrated circuit. Both sensors are arranged in a matrix and addressed columnwise, providing parallel readout of the matrix rows or optional random access. One sensor is an a-Si:H detector / x-Si switching transistor combination with 256 × 256 pixels and a pixel size of 100μm × 100μm. The signal transport in the array is examined, demonstrating its capability of very fast information readout. The second sensor, which consists of an array of 32 × 32 pixels on a 5μm PMOS ASIC, performs digital contour extraction. Experimental data on the performance of the intelligent array are also reported.

Constructing an Urban Deprivation Index: A Way of Meeting the Need for Flexibility

1995 ◽  
Vol 27 (4) ◽  
pp. 519-533 ◽  
Author(s):  
M G Bradford ◽  
B T Robson ◽  
R Tye
Keyword(s):  
Spatial Distribution ◽  
Special Reference ◽  
Spatial Scales ◽  
Spatial Extent ◽  
Deprivation Index ◽  
Enumeration District ◽  
The Matrix ◽  
Key Issues ◽  
Urban Deprivation ◽  
Selection Of

Key issues in constructing an urban deprivation index are discussed, with special reference to the need for flexibility. Governments use such an index for many purposes and for policies targeted at different spatial scales. The technical decisions and the criteria for the selection of indicators are discussed. A single index is rejected in favour of a matrix of results which captures the complex geography of deprivation. The matrix of districts includes measures of the degree of deprivation, its spatial extent, its intensity, and the spatial distribution of deprivation at the enumeration district scale. The profiles of various districts are discussed to illustrate the use of the matrix.

Crystalloid Inclusions in Hepatocyte Mitochondria and Their Similarity to Cytoplasmic Crystalloids

1974 ◽  
Vol 32 ◽  
pp. 198-199
Author(s):  
Odell T. Minick ◽  
Hidejiro Yokoo
Keyword(s):  
Liver Disease ◽  
Alcoholic Liver Disease ◽  
Special Interest ◽  
Structural Variations ◽  
Mitochondrial Alterations ◽  
The Matrix ◽  
Crystalloid Inclusions ◽  
Liver Biopsies

Mitochondrial alterations were studied in 25 liver biopsies from patients with alcoholic liver disease. Of special interest were the morphologic resemblance of certain fine structural variations in mitochondria and crystalloid inclusions. Four types of alterations within mitochondria were found that seemed to relate to cytoplasmic crystalloids.Type 1 alteration consisted of localized groups of cristae, usually oriented in the long direction of the organelle (Fig. 1A). In this plane they appeared serrated at the periphery with blind endings in the matrix. Other sections revealed a system of equally-spaced diagonal lines lengthwise in the mitochondrion with cristae protruding from both ends (Fig. 1B). Profiles of this inclusion were not unlike tangential cuts of a crystalloid structure frequently seen in enlarged mitochondria described below.

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