CN109700435A - A kind of projection intravenous angiography device and its image processing method - Google Patents
A kind of projection intravenous angiography device and its image processing method Download PDFInfo
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- CN109700435A CN109700435A CN201910079285.5A CN201910079285A CN109700435A CN 109700435 A CN109700435 A CN 109700435A CN 201910079285 A CN201910079285 A CN 201910079285A CN 109700435 A CN109700435 A CN 109700435A
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- 238000002583 angiography Methods 0.000 title claims abstract description 37
- 238000001990 intravenous administration Methods 0.000 title claims abstract description 32
- 238000003672 processing method Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000005457 optimization Methods 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 210000004204 blood vessel Anatomy 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 claims description 9
- 239000013078 crystal Substances 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 230000011218 segmentation Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- 238000013500 data storage Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 230000006870 function Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 210000003462 vein Anatomy 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Abstract
The invention discloses a kind of projection intravenous angiography device and its image processing method, contrast apparatus includes camera, utilizing camera interface circuit, projector, bus interface circuit, DSP digital signal processor, memory and power module composition；Camera is near-infrared camera；The camera is connect by utilizing camera interface circuit with DSP digital signal processor, and the projector is connect with bus interface circuit, and memory and caching are equipped with outside the DSP memory；When work, the near-infrared image of camera acquisition human skin surface, collected near-infrared image is transferred to DSP digital signal processor, after DSP digital signal processor filters near-infrared image, using after optimization statistics with histogram method and algorithm for image enhancement blood-vessel image is extracted from picture, then by treated, result passes through bus interface circuit to DSP digital signal processor, and control projector is radiated on human body surface skin.Solve the problems, such as that existing angiography instrument is limited, practical inconvenient using position.
Description
Technical field
The present invention relates to a kind of medical vein contrast apparatus, and in particular to a kind of projection intravenous angiography device and its
Image processing method.
Background technique
Currently, when needing to be infused to patient, medical staff is needed to puncture vein in medical industry, and
The process of puncture needs to judge the position of vein, belongs to the medical care operation for having certain technical difficulty, subsequent occurrences of phlebography
Device, one is flashlight type, the program can solve the angiography problem of hand, poor for other position effects, and
And influenced vulnerable to ambient light, second is display screen type, and it is aobvious that the program needs medical staff to stare at the moment in venipuncture
Display screen is not inconsistent with the habit of medical staff, uses inconvenience, then, projection occurs, the scheme of projection can solve
Above-mentioned technical problem, but the technical solution that do not realize reliably still at present.
It is therefore desirable to design a kind of technical solution, to realize projection angiography, better using effect and more is obtained
Good practicability.
Summary of the invention
The purpose of the present invention is to provide a kind of projection intravenous angiography device and its image processing methods, to solve
The problem of certainly existing angiography instrument limited, practical inconvenience using position.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of projection intravenous angiography device, the contrast apparatus include camera, utilizing camera interface circuit, projection
Instrument, bus interface circuit, DSP digital signal processor, memory and power module composition；The camera is near-infrared camera shooting
Head；The camera is connect by utilizing camera interface circuit with DSP digital signal processor, the projector and bus interface electricity
Road connection, the DSP memory outside are equipped with memory and caching；When work, camera acquires the close red of human skin surface
Outer image, collected near-infrared image are transferred to DSP digital signal processor, and DSP digital signal processor is by near-infrared figure
As filtering after, using after optimization statistics with histogram method and algorithm for image enhancement blood-vessel image is extracted from picture, then
By treated, result passes through bus interface circuit to DSP digital signal processor, and control projector is radiated at human body surface skin
On.
Preferably, the optical axis coincidence of above-mentioned camera and projector, the image and camera that projector goes out, which obtain, schemes
The position of picture is overlapped.
Preferably, above-mentioned DSP digital signal processor model DaVinci TMS320DM642, minimum circuit CLKIN draw
50MHz crystal oscillating circuit is equipped with outside foot, VF8 pin is externally provided with 30.24MHz crystal oscillating circuit, and outside further includes reset circuit, 3.3V
Power supply, 1.4V power supply circuit and JTAG in-circuit emulation circuit interface.
Preferably, carried out data transmission between above-mentioned DSP digital signal processor and camera using PXI agreement.
Preferably, above-mentioned bus interface circuit is the circuit module using SN74LVC1G17 as core chips, projector
SWIN1, SWIN2, SWIN3 and SWIN4 respectively with the 9th of the GP0 pin of DSP digital signal processor, the 10th, the 11st and the 12nd
Pin is connected.
Preferably, above-mentioned memory is the circuit module using MT48LC4M32B2P as core chips, is stored as needed
Data volume is equipped with multi-disc MT48LC4M32B2P chip, to meet data storage and buffer size.
Preferably, above-mentioned power module circuitry is to convert 12V by the circuit module of core devices of TPS65251 chip
For 3.3V, 1.4V and 1.8V, 12V is converted into 5V, TPS65251 core using TPS54622 chip as the circuit module of core devices
The typical circuit that piece and TPS54622 chip periphery circuit use chip handbook to recommend.
Preferably, above-mentioned utilizing camera interface circuit is using TVP5150 chip as the circuit module of core devices, peripheral circuit
Using chip handbook typical circuit, carried out data transmission using PXI interface with DSP digital signal processor.
A kind of image processing method of projection intravenous angiography device, includes the following steps:
STEP1: image filters out the noise in image using Gaussian filter algorithm after collecting near-infrared image；
STEP2: determining gray threshold using grey level histogram feature and statistical decision method in real time, according to statistical result reality
When dynamic adjustment STEP3 in select threshold size；
STEP3: according to selected gray threshold, filtered near-infrared image is intended using the method for interpolation fitting
Enhancing is closed, after then enhancing using the classical algorithm for image enhancement after optimization, output is shown to projector；
When Gaussian filter algorithm carries out smooth to pixel in Image neighborhood in above-mentioned STEP1, the picture of different location in neighborhood
Element is endowed different weights, and the overall gray level distribution characteristics of image can be more retained while carrying out smooth to image,
3X3 Gaussian template is chosen, the parameter in template is calculated by Gaussian function, and formula is as follows:
In formula: the quadratic sum y of x square respectively indicate be in neighborhood in other pixels and neighborhood center pixel away from
From；What σ was represented is standard deviation, and standard deviation is smaller, and dimensional Gaussian image is narrower, and smooth effect is unobvious；Standard deviation is bigger, and
For the shorter width of Gaussian image, filter effect is obvious.
Preferably, segmentation threshold is determined by the local neighborhood characteristic of each pixel in above-mentioned STEP2, obtained thresholding
It is, segmentation threshold process relevant based on region are as follows:
STEP1: image block first calculates histogram, then trims histogram in blocks, last balanced；
STEP2: linear interpolation between block, each image block of traversing operation；
STEP3: figure layer colour filter hybrid manipulation is done with original image.
The present invention has the advantage that
After design of the invention, using the scheme of camera plus projector, allow medical staff to patient
Any position carries out angiography, and contrastographic picture real-time display does not change medical staff's operating habit at skin, more practical
Property.
Detailed description of the invention
Fig. 1 is the system composition block diagram of a kind of projection intravenous angiography device of the present invention and its image processing method.
Fig. 2 is at the DSP digital signal of a kind of projection intravenous angiography device of the present invention and its image processing method
Manage 1/3 partial circuit diagram of device.
Fig. 3 is at the DSP digital signal of a kind of projection intravenous angiography device of the present invention and its image processing method
Manage 2/3 partial circuit diagram of device.
Fig. 4 is at the DSP digital signal of a kind of projection intravenous angiography device of the present invention and its image processing method
Manage 3/3 partial circuit diagram of device.
Fig. 5 is at the DSP digital signal of a kind of projection intravenous angiography device of the present invention and its image processing method
Manage the 30.24MHz crystal oscillating circuit figure of device.
Fig. 6 is the bus interface circuit of a kind of projection intravenous angiography device of the present invention and its image processing method
Figure.
Fig. 7 is the memory circuit figure of a kind of projection intravenous angiography device of the present invention and its image processing method.
Fig. 8 is the power module of a kind of projection intravenous angiography device of the present invention and its image processing method
TPS54622 chip circuit figure.
Fig. 9 is the power module of a kind of projection intravenous angiography device of the present invention and its image processing method
TPS65251 chip circuit figure.
Figure 10 is the utilizing camera interface electricity of a kind of projection intravenous angiography device of the present invention and its image processing method
Lu Tu.
Figure 11 is the image processing flow of a kind of projection intravenous angiography device of the present invention and its image processing method
Figure.
Figure 12 is the STEP1 of the STEP2 of a kind of projection intravenous angiography device of the present invention and its image processing method
Process schematic.
STEP2 that Figure 13 is the STEP2 of a kind of projection intravenous angiography device of the present invention and its image processing method,
STEP3 process schematic.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily.
It should be clear that this specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to cooperate specification to be taken off
The content shown is not intended to limit the invention enforceable qualifications so that those skilled in the art understands and reads, therefore
Do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the present invention
Under the effect of can be generated and the purpose that can reach, it should all still fall in disclosed technology contents and obtain the model that can cover
In enclosing.Meanwhile cited such as "upper", "lower", " left side ", the right side in this specification ", the term of " centre ", be merely convenient to chat
That states is illustrated, rather than to limit the scope of the invention, relativeness is altered or modified, and is changing skill without essence
It is held in art, when being also considered as the enforceable scope of the present invention.
Embodiment 1
Referring to Fig. 1, a kind of projection intravenous angiography device, the contrast apparatus includes camera, utilizing camera interface
Circuit, projector, bus interface circuit, DSP digital signal processor, memory and power module composition；The camera is
Near-infrared camera；The camera is connect by utilizing camera interface circuit with DSP digital signal processor, the projector and
Bus interface circuit connection, the DSP memory outside are equipped with memory and caching；When work, camera acquires human skin
The near-infrared image on surface, collected near-infrared image are transferred to DSP digital signal processor, DSP digital signal processor
After near-infrared image is filtered, using after optimization statistics with histogram method and algorithm for image enhancement blood vessel is extracted from picture
Image, then by treated, result passes through bus interface circuit to DSP digital signal processor, and control projector is radiated at human body
On surface skin.
Preferably, the optical axis coincidence of above-mentioned camera and projector, the image and camera that projector goes out, which obtain, schemes
The position of picture is overlapped.
- Fig. 5 referring to fig. 2, it is preferred that above-mentioned DSP digital signal processor model DaVinci TMS320DM642, most
50MHz crystal oscillating circuit is equipped with outside small circuit CLKIN pin, VF8 pin is externally provided with 30.24MHz crystal oscillating circuit, and outside further includes
Reset circuit, 3.3V power supply, 1.4V power supply circuit and JTAG in-circuit emulation circuit interface.
Preferably, carried out data transmission between above-mentioned DSP digital signal processor and camera using PXI agreement.
Referring to Fig. 6, it is preferred that above-mentioned bus interface circuit is the circuit module using SN74LVC1G17 as core chips, is thrown
SWIN1, SWIN2, SWIN3 and SWIN4 of shadow instrument respectively with the 9th of the GP0 pin of DSP digital signal processor, the 10th, the 11st
It is connected with the 12nd pin.
Referring to Fig. 7, it is preferred that above-mentioned memory is the circuit module using MT48LC4M32B2P as core chips, according to need
The data volume to be stored is equipped with multi-disc MT48LC4M32B2P chip, to meet data storage and buffer size.
Referring to figure, 8, Fig. 9, it is preferred that above-mentioned power module circuitry is using TPS65251 chip as the circuit of core devices
12V is converted to 3.3V, 1.4V and 1.8V by module, is converted to 12V by the circuit module of core devices of TPS54622 chip
The typical circuit that 5V, TPS65251 chip and TPS54622 chip periphery circuit use chip handbook to recommend.
Referring to Figure 10, it is preferred that above-mentioned utilizing camera interface circuit is the circuit mould using TVP5150 chip as core devices
Block, peripheral circuit are used chip handbook typical circuit, are carried out data transmission using PXI interface with DSP digital signal processor.
Referring to Figure 11, a kind of image processing method of projection intravenous angiography device includes the following steps:
STEP1: image filters out the noise in image using Gaussian filter algorithm after collecting near-infrared image；
STEP2: determining gray threshold using grey level histogram feature and statistical decision method in real time, according to statistical result reality
When dynamic adjustment STEP3 in select threshold size；
STEP3: according to selected gray threshold, filtered near-infrared image is intended using the method for interpolation fitting
Enhancing is closed, after then enhancing using the classical algorithm for image enhancement after optimization, output is shown to projector；
When Gaussian filter algorithm carries out smooth to pixel in Image neighborhood in above-mentioned STEP1, the picture of different location in neighborhood
Element is endowed different weights, and the overall gray level distribution characteristics of image can be more retained while carrying out smooth to image,
3X3 Gaussian template is chosen, the parameter in template is calculated by Gaussian function, and formula is as follows:
In formula: the quadratic sum y of x square respectively indicate be in neighborhood in other pixels and neighborhood center pixel away from
From；What σ was represented is standard deviation, and standard deviation is smaller, and dimensional Gaussian image is narrower, and smooth effect is unobvious；Standard deviation is bigger, and
For the shorter width of Gaussian image, filter effect is obvious.
Preferably, segmentation threshold is determined by the local neighborhood characteristic of each pixel in above-mentioned STEP2, obtained thresholding
It is, segmentation threshold process relevant based on region are as follows:
STEP1: referring to Figure 12, image block first calculates histogram, then trims histogram in blocks, last equal
Weighing apparatus；
STEP2: referring to Figure 13, linear interpolation between block, each image block of traversing operation；
STEP3: figure layer colour filter hybrid manipulation is done with original image.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.
Claims (10)
1. a kind of projection intravenous angiography device, it is characterised in that: the contrast apparatus includes camera, utilizing camera interface
Circuit, projector, bus interface circuit, DSP digital signal processor, memory and power module composition；The camera is
Near-infrared camera；The camera is connect by utilizing camera interface circuit with DSP digital signal processor, the projector and
Bus interface circuit connection, the DSP memory outside are equipped with memory and caching；When work, camera acquires human skin
The near-infrared image on surface, collected near-infrared image are transferred to DSP digital signal processor, DSP digital signal processor
After near-infrared image is filtered, using after optimization statistics with histogram method and algorithm for image enhancement blood vessel is extracted from picture
Image, then by treated, result passes through bus interface circuit to DSP digital signal processor, and control projector is radiated at human body
On surface skin.
2. a kind of projection intravenous angiography device according to claim 1, it is characterised in that: the camera and throwing
The optical axis coincidence of shadow instrument, the image that projector goes out are overlapped with the position that camera obtains image.
3. a kind of projection intravenous angiography device according to claim 1, it is characterised in that: the DSP number letter
Number processor model is DaVinci TMS320DM642, is equipped with 50MHz crystal oscillating circuit, VF8 outside minimum circuit CLKIN pin
Pin is externally provided with 30.24MHz crystal oscillating circuit, and outside further includes reset circuit, 3.3V power supply, 1.4V power supply circuit and JTAG online
Artificial circuit interface.
4. a kind of projection intravenous angiography device according to claim 3, it is characterised in that: the DSP number
Carried out data transmission between signal processor and camera using PXI agreement.
5. a kind of projection intravenous angiography device according to claim 1, it is characterised in that: the bus interface electricity
Road is the circuit module using SN74LVC1G17 as core chips, SWIN1, SWIN2, SWIN3 and SWIN4 of projector respectively and
The the 9th, the 10th, the 11st of the GP0 pin of DSP digital signal processor is connected with the 12nd pin.
6. a kind of projection intravenous angiography device according to claim 1, it is characterised in that: the memory be with
MT48LC4M32B2P is the circuit module of core chips, and the data volume stored as needed is equipped with multi-disc MT48LC4M32B2P
Chip, to meet data storage and buffer size.
7. a kind of projection intravenous angiography device according to claim 1, it is characterised in that: the power module electricity
Road is that 12V is converted to 3.3V, 1.4V and 1.8V by the circuit module of core devices of TPS65251 chip, with TPS54622 core
Piece is that 12V is converted to 5V by the circuit module of core devices, and TPS65251 chip and TPS54622 chip periphery circuit use core
The typical circuit that piece handbook is recommended.
8. a kind of projection intravenous angiography device according to claim 1, it is characterised in that: the utilizing camera interface
Circuit is using TVP5150 chip as the circuit module of core devices, and peripheral circuit uses chip handbook typical circuit, using PXI
Interface carries out data transmission with DSP digital signal processor.
9. a kind of image processing method of projection intravenous angiography device according to claim 1, it is characterised in that:
Include the following steps:
STEP1: image filters out the noise in image using Gaussian filter algorithm after collecting near-infrared image；
STEP2: gray threshold is determined in real time using grey level histogram feature and statistical decision method, is moved in real time according to statistical result
State adjusts the threshold size selected in STEP3；
STEP3: according to selected gray threshold, increasing is fitted using the method for interpolation fitting to filtered near-infrared image
By force, after then being enhanced using the classical algorithm for image enhancement after optimization, output is shown to projector；
When Gaussian filter algorithm carries out smooth to pixel in Image neighborhood in above-mentioned STEP1, the pixel quilt of different location in neighborhood
Different weights is assigned, the overall gray level distribution characteristics of image can be more retained while carrying out smooth to image, is chosen
3X3 Gaussian template, the parameter in template are calculated by Gaussian function, and formula is as follows:
In formula: the quadratic sum y of x square respectively indicate be in neighborhood other pixels at a distance from center pixel in neighborhood；σ generation
Table is standard deviation, and standard deviation is smaller, and dimensional Gaussian image is narrower, and smooth effect is unobvious；Standard deviation is bigger, and is Gauss
The shorter width of image, filter effect are obvious.
10. a kind of image processing method of projection intravenous angiography device according to claim 9, feature exist
In: segmentation threshold is determined by the local neighborhood characteristic of each pixel in the STEP2, and obtained thresholding is based on region phase
It closes, segmentation threshold process are as follows:
STEP1: image block first calculates histogram, then trims histogram in blocks, last balanced；
STEP2: linear interpolation between block, each image block of traversing operation；
STEP3: figure layer colour filter hybrid manipulation is done with original image.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI777142B (en) * | 2019-05-15 | 2022-09-11 | 日商日本麥克隆尼股份有限公司 | Blood vessel position display device and blood vessel position display method |
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Application publication date: 20190503 |