CN109598717A - Scan pattern switching system - Google Patents
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- CN109598717A CN109598717A CN201811485064.XA CN201811485064A CN109598717A CN 109598717 A CN109598717 A CN 109598717A CN 201811485064 A CN201811485064 A CN 201811485064A CN 109598717 A CN109598717 A CN 109598717A
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- 238000012545 processing Methods 0.000 claims abstract description 37
- 238000002591 computed tomography Methods 0.000 claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 238000000605 extraction Methods 0.000 claims abstract description 7
- 238000013480 data collection Methods 0.000 claims abstract description 6
- 230000002708 enhancing effect Effects 0.000 claims description 30
- 238000001914 filtration Methods 0.000 claims description 23
- 238000012937 correction Methods 0.000 claims description 13
- 230000003044 adaptive effect Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 8
- 238000002583 angiography Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims description 2
- 241000208340 Araliaceae Species 0.000 claims 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 1
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 1
- 235000008434 ginseng Nutrition 0.000 claims 1
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000003902 lesion Effects 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000010968 computed tomography angiography Methods 0.000 description 1
- 239000002872 contrast media Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0012—Biomedical image inspection
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/20—Image enhancement or restoration using local operators
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/80—Geometric correction
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/90—Dynamic range modification of images or parts thereof
- G06T5/94—Dynamic range modification of images or parts thereof based on local image properties, e.g. for local contrast enhancement
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10072—Tomographic images
- G06T2207/10081—Computed x-ray tomography [CT]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20024—Filtering details
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20172—Image enhancement details
- G06T2207/20192—Edge enhancement; Edge preservation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30004—Biomedical image processing
- G06T2207/30101—Blood vessel; Artery; Vein; Vascular
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- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Quality & Reliability (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
The present invention relates to a kind of scan pattern switching systems, it include: front end processing components, including CT scan equipment, CT image acquisition equipment, format conversion equipment and reading data equipment, the format conversion equipment is connect with the CT image acquisition equipment and the reading data equipment respectively, and the CT scan equipment is connect with the CT image acquisition equipment；First back-end processing component, including three-dimensional data collection generating device and said three-dimensional body reconstructing apparatus；Second back-end processing component, including Boundary Extraction equipment, edge fitting equipment and data display equipment；Mode switching device is connect with CT scan equipment and structures capture equipment respectively, realizes the switching to the scan pattern of the CT scan equipment for determining the scan pattern of the CT scan equipment based on captured at jobsite type, and based on determining scan pattern.By means of the invention it is possible to flexibly switch the scan pattern of CT scan equipment.
Description
Technical field
The present invention relates to CT scan field more particularly to a kind of scan pattern switching systems.
Background technique
CT scan equipment mainly has following three parts:
1, sweep test is made of X-ray tube, detector and scanning support；
2, the information data that scanning is collected into is carried out storage operation by computer system；
3, image is shown and storage system, and the image for handling, rebuilding through computer is shown on TV screen or uses several
Camera or laser camera photograph image.Detector develops to up to 4800 from original 1.Scanning mode is also from flat
Shifting/rotation, rotation/rotation, rotation/fixation, develop to the CT scan developed recently.Computer capacity is big, operation is fast, can
Reach reconstruction image immediately.Since sweep time is short, the artifact that movement generates can avoid, for example, respirometric interference, can mention
High image quality；Level is continuous, so being not to miss lesion, and feasible three-dimensional reconstruction, injection contrast agent makees blood vessel
Radiography can obtain CT angiography.
Summary of the invention
In order to solve CT Scanner in the prior art can not be corrected in time according to the organization of human body type specifically scanned it is subsequent
The technical issues of scan pattern, the present invention provides a kind of scan pattern switching systems.
For this purpose, the present invention needs to have inventive point crucial at following three: (1) carrying out comparison of light and shade to edge enhanced images
Degree parsing operation, wherein particular, it is important that each gray value of each pixel based on edge enhanced images carries out light and shade
The parsing of contrast；(2) in the case where light and shade contrast's backlog demand, light and shade contrast is executed using processing equipment is promoted
Processing is promoted to obtain light and shade contrast's contrast up to standard and promote image；(3) structures capture equipment is used, for will be at customization
Image and various human body normal structures after reason carry out similarity-rough set, and the highest human body normal structure of similarity is corresponding
Structure type is exported as captured at jobsite type, additionally uses mode switching device, for true based on the captured at jobsite type
The scan pattern of the fixed CT scan equipment, and the scan pattern to the CT scan equipment is realized based on determining scan pattern
Switching.
According to an aspect of the present invention, a kind of scan pattern switching system is provided, the system comprises:
Front end processing components, including CT scan equipment, CT image acquisition equipment, format conversion equipment and reading data are set
Standby, the format conversion equipment is connect with the CT image acquisition equipment and the reading data equipment respectively, the CT scan
Equipment is connect with the CT image acquisition equipment.
More specifically, in the scan pattern switching system: the first back-end processing component, including three-dimensional data collection are raw
Forming apparatus and said three-dimensional body reconstructing apparatus；Second back-end processing component, including Boundary Extraction equipment, edge fitting equipment and data are aobvious
Show equipment.
More specifically, in the scan pattern switching system: the edge fitting equipment respectively with the Boundary Extraction
Equipment is connected with the data display equipment, and the three-dimensional data collection generating device is connected with the said three-dimensional body reconstructing apparatus.
More specifically, in the scan pattern switching system, further includes:
Mode switching device is connect with CT scan equipment and structures capture equipment respectively, for being based on captured at jobsite type
It determines the scan pattern of the CT scan equipment, and the scanning mould to the CT scan equipment is realized based on determining scan pattern
The switching of formula；Gamma correcting equipment is connect with the CT image acquisition equipment, for receiving the CT image acquisition equipment output
Live reconstruction image, gamma correction processing is executed to the live reconstruction image, to obtain corresponding gamma correction image, and
Export the gamma correction image；Edge enhances equipment, connect with the gamma correcting equipment, for receiving the gamma correction
Image executes edge enhancing processing to the gamma correction image, to obtain corresponding edge enhanced images；Light and shade parsing is set
It is standby, it is connect with edge enhancing equipment, for receiving the edge enhanced images, light and shade is executed to the edge enhanced images
Contrast parsing operation, to obtain the light and shade contrast of the edge enhanced images to export as reference light and shade contrast；?
In the light and shade analyzing device, light and shade contrast is executed to the edge enhanced images and parses operation, increased with obtaining the edge
The light and shade contrast of strong image is to include: to obtain each pixel in the edge enhanced images as reference light and shade contrast output
Each gray value of point, the light and shade contrast of the edge enhanced images is determined based on each gray value of each pixel
And it is exported as described with reference to light and shade contrast；Parameter compares equipment, connect with the light and shade analyzing device, described for receiving
It is compared with reference to light and shade contrast with light and shade contrast's threshold value with reference to light and shade contrast, and by described, with bright in the reference
It when dark contrast is more than or equal to light and shade contrast's threshold value, issues first and compares instruction, described small with reference to light and shade contrast
When light and shade contrast's threshold value, issues second and compare instruction；Promoted processing equipment, compared respectively with the parameter equipment and
The light and shade analyzing device connection, for being executed to the edge enhanced images bright when receiving the second comparison instruction
Dark contrast promotion processing promotes image to obtain contrast, is also used to when receiving first control instruction, will be described
Edge enhanced images are spent as a comparison promotes image output；Structures capture equipment is connect, for connecing with the promotion processing equipment
It receives the contrast and promotes image, and the contrast is promoted into image and various human body normal structures progress similarity-rough set,
The corresponding structure type of the highest human body normal structure of similarity to be exported as captured at jobsite type；Wherein, in the mould
In formula switching equipment, the scan pattern of the CT scan equipment includes unenhanced mode, enhancing scan pattern and angiography scans mode.
More specifically, in the scan pattern switching system: it is mono- in the parameter comparison equipment to be also built-in with RAM
Member, for storing light and shade contrast's threshold value.
More specifically, in the scan pattern switching system, further includes:
Nonlinear filtering wave device is connect with the CT image acquisition equipment, non-for executing to the live reconstruction image
Linear filtering processing, to obtain corresponding nonlinear filtering image, and exports the nonlinear filtering image；Quantity detection is set
It is standby, it is connect with the nonlinear filtering wave device, for detecting the noise type quantity in the nonlinear filtering image, and in institute
When stating noise type quantity more than preset quantity threshold value, request enhancing signal is issued.
More specifically, in the scan pattern switching system, further includes:
Contrast enhances equipment, connect with the quantity detection device, for when receiving the request enhances signal,
The contrast enhancement processing of the enhancing intensity directly proportional to the noise type quantity is executed to the nonlinear filtering image, with
Obtain adaptive enhancing image；TF storage chip identifies that equipment and data identification apparatus are connect with variation degree respectively, for pre-
First storage preset quantity threshold value and default variation limitation.
Detailed description of the invention
Embodiment of the present invention is described below with reference to attached drawing, in which:
Fig. 1 is the structural representation according to the CT scan equipment of the scan pattern switching system shown in embodiment of the present invention
Figure.
Specific embodiment
The embodiment of scan pattern switching system of the invention is described in detail below with reference to accompanying drawings.
CT scan equipment according to human body different tissues to the absorption of x-ray and the difference of transmitance, it is high using sensitivity
Instrument measures human body, and the acquired data of measurement are then inputted electronic computer, and electronic computer carries out data
After processing, so that it may photograph human body and be examined the section at position or the image of solid, find the tiny lesion at any position in vivo.
In order to overcome above-mentioned deficiency, the present invention has built a kind of scan pattern switching system, can effectively solve the problem that corresponding
Technical problem.
The scan pattern switching system shown according to an embodiment of the present invention includes:
Front end processing components, including CT scan equipment, CT image acquisition equipment, format conversion equipment and reading data are set
Standby, the format conversion equipment is connect with the CT image acquisition equipment and the reading data equipment respectively, the CT scan
Equipment is connect with the CT image acquisition equipment, and the structure of the CT scan equipment is as shown in Figure 1.
Then, continue that the specific structure of scan pattern switching system of the invention is further detailed.
In the scan pattern switching system: the first back-end processing component, including three-dimensional data collection generating device and
Said three-dimensional body reconstructing apparatus；
Second back-end processing component, including Boundary Extraction equipment, edge fitting equipment and data display equipment.
In the scan pattern switching system: the edge fitting equipment respectively with the Boundary Extraction equipment and described
Data display equipment connection, the three-dimensional data collection generating device are connected with the said three-dimensional body reconstructing apparatus.
In the scan pattern switching system, further includes:
Mode switching device is connect with CT scan equipment and structures capture equipment respectively, for being based on captured at jobsite type
It determines the scan pattern of the CT scan equipment, and the scanning mould to the CT scan equipment is realized based on determining scan pattern
The switching of formula；
Gamma correcting equipment is connect with the CT image acquisition equipment, for receiving the CT image acquisition equipment output
Live reconstruction image, gamma correction processing is executed to the live reconstruction image, to obtain corresponding gamma correction image, and
Export the gamma correction image；
Edge enhances equipment, connect with the gamma correcting equipment, for receiving the gamma correction image, to the gal
Horse corrects image and executes edge enhancing processing, to obtain corresponding edge enhanced images；
Light and shade analyzing device is connect, for receiving the edge enhanced images, to the side with edge enhancing equipment
Edge, which enhances image and executes light and shade contrast, parses operation, to obtain the light and shade contrasts of the edge enhanced images using as reference
Light and shade contrast's output；
In the light and shade analyzing device, light and shade contrast is executed to the edge enhanced images and parses operation, to obtain
The light and shade contrast of the edge enhanced images is to include: to obtain the edge enhanced images as reference light and shade contrast output
In each pixel each gray value, the edge enhanced images are determined based on each gray value of each pixel
Light and shade contrast simultaneously exports as described with reference to light and shade contrast；
Parameter compares equipment, connect with the light and shade analyzing device, for receive it is described refer to light and shade contrast, and by institute
It states and is compared with reference to light and shade contrast with light and shade contrast's threshold value, stated clearly with being more than or equal in the reference light and shade contrast
When dark contrast threshold, issues first and compare instruction, when the reference light and shade contrast is less than light and shade contrast's threshold value,
It issues second and compares instruction；
Processing equipment is promoted, equipment is compared with the parameter respectively and the light and shade analyzing device is connect, for receiving
When comparing instruction to described second, light and shade contrast's promotion processing is executed to the edge enhanced images, is mentioned with obtaining contrast
Image is risen, is also used to when receiving first control instruction, the edge enhanced images are spent as a comparison and promote image
Output；
Structures capture equipment is connect with the promotion processing equipment, promotes image for receiving the contrast, and by institute
It states contrast and promotes image and various human body normal structures progress similarity-rough set, by the highest human body normal structure of similarity
Corresponding structure type is exported as captured at jobsite type；
Wherein, in the mode switching device, the scan pattern of the CT scan equipment includes unenhanced mode, enhances and sweep
Retouch mode and angiography scans mode.
In the scan pattern switching system: ram cell is also built-in in the parameter comparison equipment, for storing
Light and shade contrast's threshold value.
In the scan pattern switching system, further includes:
Nonlinear filtering wave device is connect with the CT image acquisition equipment, non-for executing to the live reconstruction image
Linear filtering processing, to obtain corresponding nonlinear filtering image, and exports the nonlinear filtering image；
Quantity detection device is connect with the nonlinear filtering wave device, for detecting in the nonlinear filtering image
Noise type quantity, and when the noise type quantity is more than preset quantity threshold value, issue request enhancing signal.
In the scan pattern switching system, further includes:
Contrast enhances equipment, connect with the quantity detection device, for when receiving the request enhances signal,
The contrast enhancement processing of the enhancing intensity directly proportional to the noise type quantity is executed to the nonlinear filtering image, with
Obtain adaptive enhancing image；
TF storage chip identifies that equipment and data identification apparatus are connect with variation degree respectively, default for being stored in advance
Amount threshold and default variation limitation.
In the scan pattern switching system, further includes:
Variation degree identifies equipment, connect with contrast enhancing equipment, for obtaining the adaptive enhancing image
In each object, check the pixel sum that each object occupies, the pixel sum occupied be less than or equal to present count
The object of amount threshold value screens out, and to obtain remaining multiple objects, traverses each of each pixel in each remaining object
A pixel value analyzes the variation degree of the pixel value array of each remaining object to form corresponding pixel value array；Institute
The variation degree for stating the pixel value array for analyzing each remaining object includes: the maximum value obtained in the pixel value array
And minimum value, by the maximum value subtract difference that the minimum value obtains divided by the pixel value quantity of the pixel value array with
Obtain the variation degree of the pixel value array.
In the scan pattern switching system, further includes:
Data identification equipment is connect with the gamma correcting equipment and variation degree identification equipment respectively, and being used for will
Variation degree is more than or equal to the corresponding object of pixel value array of default variation limitation as high price value object, determines the multiple
High price value object is respectively at multiple high value regions in the adaptive enhancing image, and by the multiple high value region
The whole replacement live reconstruction image is sent to the gamma correcting equipment.
In the scan pattern switching system: the variation degree identification equipment and the data identification equipment are using string
Row communication interface is attached；
Wherein, the variation degree identification equipment is by object acquisition unit, object screening unit and object handles unit group
At；
Wherein, the quantity detection device is also used to be less than the preset quantity threshold value in the noise type quantity
When, it issues without enhancing signal；
Wherein, contrast enhancing equipment receive it is described without when enhancing signal, by the nonlinear filtering figure
As adaptive enhancing image.
Furthermore it is possible to replace the TF storage chip using FPM dram chip.FPM DRAM(Fast Page Mode
RAM): fast page mode memory.Be it is a kind of in 486 periods by commonly used memory (also once application is video memory).72 lines, 5V
Voltage, bandwidth 32bit, base speed 60ns or more.His read cycle is since DRAM array the triggering of certain a line, so
It moves back to memory address pointed location, that is, includes required data.First information is deposited after must being proved effectively to system,
It could get ready for next cycle." wait state " is thus introduced, because the waiting memory that CPU must be stupid is completed
A cycle.Why FPM is widely used, a major reason be exactly he be kind of standard and safety product, and very
Cheaply.
It, can not be according to specifically scanning for CT Scanner in the prior art using scan pattern switching system of the invention
Organization of human body type corrects the technical issues of follow up scan mode in time, by carrying out light and shade contrast's solution to edge enhanced images
Analysis operation, wherein particular, it is important that each gray value of each pixel based on edge enhanced images carries out comparison of light and shade
The parsing of degree；In the case where light and shade contrast's backlog demand, executed at light and shade contrast's promotion using processing equipment is promoted
Reason promotes image to obtain light and shade contrast's contrast up to standard；Structures capture equipment is also used, for will be after customized treatment
Image and various human body normal structures carry out similarity-rough set, by the corresponding structure class of the highest human body normal structure of similarity
Type is exported as captured at jobsite type, additionally uses mode switching device, described in being determined based on the captured at jobsite type
The scan pattern of CT scan equipment, and cutting to the scan pattern of the CT scan equipment is realized based on determining scan pattern
It changes.
It is understood that although the present invention has been disclosed in the preferred embodiments as above, above-described embodiment not to
Limit the present invention.For any person skilled in the art, without departing from the scope of the technical proposal of the invention,
Many possible changes and modifications all are made to technical solution of the present invention using the technology contents of the disclosure above, or are revised as
With the equivalent embodiment of variation.Therefore, anything that does not depart from the technical scheme of the invention are right according to the technical essence of the invention
Any simple modifications, equivalents, and modifications made for any of the above embodiments still fall within the range of technical solution of the present invention protection
It is interior.
Claims (10)
1. a kind of scan pattern switching system, the system comprises:
Front end processing components, including CT scan equipment, CT image acquisition equipment, format conversion equipment and reading data equipment, institute
Format conversion equipment is stated to connect with the CT image acquisition equipment and the reading data equipment respectively, the CT scan equipment with
The CT image acquisition equipment connection.
2. scan pattern switching system as described in claim 1, it is characterised in that:
First back-end processing component, including three-dimensional data collection generating device and said three-dimensional body reconstructing apparatus；
Second back-end processing component, including Boundary Extraction equipment, edge fitting equipment and data display equipment.
3. scan pattern switching system as claimed in claim 2, it is characterised in that:
The edge fitting equipment is connect with the Boundary Extraction equipment and the data display equipment respectively, the said three-dimensional body number
It is connected according to collection generating device with the said three-dimensional body reconstructing apparatus.
4. scan pattern switching system as claimed in claim 3, which is characterized in that the system also includes:
Mode switching device is connect with CT scan equipment and structures capture equipment respectively, for being determined based on captured at jobsite type
The scan pattern of the CT scan equipment, and realized based on determining scan pattern to the scan pattern of the CT scan equipment
Switching；
Gamma correcting equipment is connect with the CT image acquisition equipment, for receiving showing for the CT image acquisition equipment output
Field reconstruction image executes gamma correction processing to the live reconstruction image, to obtain corresponding gamma correction image, and exports
The gamma correction image；
Edge enhances equipment, connect with the gamma correcting equipment, for receiving the gamma correction image, to the gamma school
Positive image executes edge enhancing processing, to obtain corresponding edge enhanced images；
Light and shade analyzing device is connect with edge enhancing equipment, for receiving the edge enhanced images, is increased to the edge
Strong image executes light and shade contrast and parses operation, to obtain the light and shade contrasts of the edge enhanced images using as reference light and shade
Contrast output；
In the light and shade analyzing device, light and shade contrast is executed to the edge enhanced images and parses operation, described in obtaining
The light and shade contrast of edge enhanced images is to include: to obtain in the edge enhanced images respectively as reference light and shade contrast output
Each gray value of a pixel determines the light and shade of the edge enhanced images based on each gray value of each pixel
Contrast is simultaneously exported as described with reference to light and shade contrast；
Parameter compares equipment, connect with the light and shade analyzing device, for receive it is described refer to light and shade contrast, and by the ginseng
It examines light and shade contrast to be compared with light and shade contrast's threshold value, to be more than or equal to the light and shade pair with reference to light and shade contrast described
It when than degree threshold value, issues first and compares instruction, when the reference light and shade contrast is less than light and shade contrast's threshold value, issue
Second compares instruction；
Processing equipment is promoted, equipment is compared with the parameter respectively and the light and shade analyzing device is connect, for receiving
When stating the second comparison instruction, light and shade contrast's promotion processing is executed to the edge enhanced images, to obtain contrast promotion figure
Picture is also used to when receiving first control instruction, and the edge enhanced images are spent as a comparison and promote image output；
Structures capture equipment is connect with the promotion processing equipment, promotes image for receiving the contrast, and will be described right
Image is promoted than degree and various human body normal structures carry out similarity-rough set, the highest human body normal structure of similarity is corresponding
Structure type as captured at jobsite type export；
Wherein, in the mode switching device, the scan pattern of the CT scan equipment includes unenhanced mode, enhancing scanning mould
Formula and angiography scans mode.
5. scan pattern switching system as claimed in claim 4, it is characterised in that:
It is also built-in with ram cell in the parameter comparison equipment, for storing light and shade contrast's threshold value.
6. scan pattern switching system as claimed in claim 5, which is characterized in that the system also includes:
Nonlinear filtering wave device is connect with the CT image acquisition equipment, non-linear for executing to the live reconstruction image
Filtering processing, to obtain corresponding nonlinear filtering image, and exports the nonlinear filtering image；
Quantity detection device is connect with the nonlinear filtering wave device, for detecting the noise in the nonlinear filtering image
Number of types, and when the noise type quantity is more than preset quantity threshold value, issue request enhancing signal.
7. scan pattern switching system as claimed in claim 6, which is characterized in that the system also includes:
Contrast enhances equipment, connect with the quantity detection device, for when receiving the request enhances signal, to institute
The contrast enhancement processing that nonlinear filtering image executes the enhancing intensity directly proportional to the noise type quantity is stated, to obtain
Adaptive enhancing image；
TF storage chip identifies that equipment and data identification apparatus are connect with variation degree respectively, for preset quantity to be stored in advance
Threshold value and default variation limitation.
8. scan pattern switching system as claimed in claim 7, which is characterized in that the system also includes:
Variation degree identifies equipment, connect with contrast enhancing equipment, for obtaining in the adaptive enhancing image
Each object checks the pixel sum that each object occupies, the pixel sum occupied is less than or equal to preset quantity threshold
The object of value screens out, and to obtain remaining multiple objects, traverses each picture of each pixel in each remaining object
Plain value analyzes the variation degree of the pixel value array of each remaining object to form corresponding pixel value array；Described point
The variation degree for analysing the pixel value array of each remaining object includes: to obtain maximum value in the pixel value array and most
The maximum value is subtracted difference that the minimum value obtains divided by the pixel value quantity of the pixel value array to obtain by small value
The variation degree of the pixel value array.
9. scan pattern switching system as claimed in claim 8, which is characterized in that the system also includes:
Data identification equipment is connect, for that will change respectively with the gamma correcting equipment and variation degree identification equipment
Degree is more than or equal to the corresponding object of pixel value array of default variation limitation as high price value object, determines the multiple high price
Value object is respectively at multiple high value regions in the adaptive enhancing image, and by the multiple high value region entirety
It replaces the live reconstruction image and is sent to the gamma correcting equipment.
10. scan pattern switching system as claimed in claim 9, it is characterised in that:
The variation degree identification equipment and the data identification equipment are attached using serial communication interface；
Wherein, the variation degree identification equipment is made of object acquisition unit, object screening unit and object handles unit；
Wherein, the quantity detection device is also used to when the noise type quantity is less than the preset quantity threshold value, hair
Out without enhancing signal；
Wherein, contrast enhancing equipment receive it is described it is not necessary that when enhancing signal, the nonlinear filtering image is made
Adaptively to enhance image.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115250313A (en) * | 2022-06-30 | 2022-10-28 | 先临三维科技股份有限公司 | Variable mode scanning method, device, equipment and storage medium |
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