CN103901378B - The brightness control system and method for image in magnetic resonance system - Google Patents
The brightness control system and method for image in magnetic resonance system Download PDFInfo
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- CN103901378B CN103901378B CN201210575940.4A CN201210575940A CN103901378B CN 103901378 B CN103901378 B CN 103901378B CN 201210575940 A CN201210575940 A CN 201210575940A CN 103901378 B CN103901378 B CN 103901378B
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Abstract
The invention discloses a kind of brightness control system for the image being used in magnetic resonance system, it includes：Module is rebuild, the signal for merging receiving coil is rebuild to obtain original image；Searching modul, for searching the brightness range [Smin, Smax] of original image；Setting module, for setting brightness limit value F, wherein F ＜ 2N, and F takes positive integer, N is the digit of image；Computing module, for calculating luminance factor α, α=F/ (Smax Smin)；Conversion module, for utilizing formula Id=α * Ir, original image is changed into DICOM images, wherein, Id is the brightness of DICOM images, and Ir is the brightness of original image.The present invention by calculating luminance factor automatically, it is ensured that picture carrier portion overflow, while can also to greatest extent utilize magnetic resonance DICOM images maximum gray scale order range.
Description
【Technical field】
The present invention is brightness control system and method about the image in a kind of magnetic resonance system.
【Technical background】
Modern MR imaging apparatus is imaged usually using the receiving coil of multichannel.The letter that multichannel is received
Number merging is then converted into medical digital image and communication standard image (Digital ImagingCommunications in
Medicine, abbreviation DICOM) MRI of form stored and transmitted.For magnetic resonance DICOM images, generally with
The integer of 12 stores, i.e., image has 4096 gray levels.Image after multi-channel data is merged is referred to as original image, its
The form of data is floating point type (single precision or double precision), and the brightness range of signal changes very greatly, it is necessary to set one
Original image is converted into the integer DICOM data of 12 by proportionality coefficient α (luminance factor).If luminance factor setting is too high,
Picture signal can be caused to overflow, luminance factor setting is too low, causes picture signal too low, image gray levels loss, loss in detail.
Luminance factor is demarcated to each receiving coil at present.Its value is fixed with corresponding coil.For magnetic
Resonance image-forming, the different contrast image of different sequence acquisitions, their dynamic range are very big.Using fixed luminance factor very
Difficulty makes full use of the dynamic range of 12 gray levels, and all kinds image neither signal is overflowed, and signal does not also occur
Brightness is too low.
Therefore, it is necessory to provide a kind of brightness adjusting method of improved image, to overcome the brightness of above-mentioned image to adjust
The defects of section method is present.
【The content of the invention】
It is an object of the invention to provide a kind of brightness adjusting method of image.
The brightness control system of the image of the present invention is to be achieved through the following technical solutions：One kind is used in magnetic resonance system
Image brightness control system, it includes：
Module is rebuild, the signal for merging receiving coil is rebuild to obtain original image；
Searching modul, for searching the brightness range [Smin, Smax] of original image；
Setting module, for setting brightness limit value F, wherein F ＜ 2N, and F takes positive integer, N is the digit of image；
Computing module, for calculating luminance factor α, α=F/ (Smax-Smin)；
Conversion module, for utilizing formula Id=α * Ir, original image is changed into DICOM images, wherein, Id is
The brightness of DICOM images, Ir are the brightness of original image.
In a preferred embodiment, the original image brightness minimum value Smin is 0.
In a preferred embodiment, the digit N of described image is 12.
In a preferred embodiment, described image brightness limit value F default value is 4095.
In a preferred embodiment, the brightness storage of array of the original image, the brightness model of the original image
Enclose by traveling through the array, by comparing what is obtained two-by-two.
The brightness adjusting method of the image of the present invention is to be achieved through the following technical solutions：One kind is used in magnetic resonance system
Image brightness adjusting method, it includes：
The signal for merging receiving coil is rebuild to obtain original image；
Search the brightness range [Smin, Smax] of original image；
Set brightness limit value F, wherein F ＜ 2N, and F takes positive integer, N is the digit of image；
Calculate luminance factor α, α=F/ (Smax-Smin)；
Using formula Id=α * Ir, original image is changed into DICOM images, wherein, Id is the brightness of DICOM images,
Ir is the brightness of original image.
In a preferred embodiment, the original image brightness minimum value Smin is 0.
In a preferred embodiment, the digit N of described image is 12.
In a preferred embodiment, described image brightness limit value F default value is 4095.
In a preferred embodiment, the brightness storage of array of the original image, by traveling through the array, passing through
Compare to obtain the brightness range of the original image two-by-two.
Compared with prior art, it is of the invention by calculating luminance factor automatically, it is ensured that to overflow in picture carrier portion
Go out, while the maximum gray scale order range of magnetic resonance DICOM images can also be utilized to greatest extent.
【Brief description of the drawings】
Fig. 1 is the schematic diagram of magnetic resonance system.
Fig. 2 is the module map of the brightness control system of image of the present invention.
Fig. 3 is the flow chart of the brightness adjusting method of image of the present invention.
【Embodiment】
It refer to shown in Fig. 1, Fig. 1 illustrates the critical piece of the magnetic resonance system 10 comprising the present invention, and the system is logical
Cross operator's console 12 to be controlled, console 12 includes keyboard and/or other input equipments 13, control panel 14 and shown
Display screen 16.Console 12 is connected by connection member 18 with an independent computer system 20, and computer system 20 can make operation
Member can control the generation and display of image on display screen 16.The computer system 20 includes being communicated with each other by backboard 20a
Some modules, these modules include image processor module 22, CPU modules 24 and memory modules 26, and memory modules 26 can
Be known to industry be used for storage image data group frame buffer.Computer system 20 is connected with hard disk 28 and magnetic disc 30, is deposited
View data and program are stored up, and is connected by high speed serialization connection 34 with an autonomous control system 32.
Control system 32 includes the one group of module to be interconnected by a backboard 32a, and the module includes CPU moulds
Group 36, the impulse generator module 38 being connected by being connected in series (serial link) 40 with console 12.Control system 32 is logical
Cross the instruction for the scanning sequence (scan sequence) that needs of the reception of serial connection 40 from operator perform.Pulse generation
The runtime component of device module 38, performs the scanning sequence specified, output data, such as：The meter of the radio-frequency pulse of radio-frequency transmissions
When, intensity, shape, the timing of radio frequency reception and the length of data acquisition window.Impulse generator module 38 is connected to a series of
Gradient amplifier system 42, for controlling the duration and shape of caused gradient pulse in (indicate) scanning process.Pulse
Generator module 38 can receive patient information from physiological acquisition controller 44, and the physiological acquisition controller 44 is by being connected to
Some different sensor collection signals of patient, such as ECG signal is obtained by the electrode with patient.Arteries and veins
Rush generator module 38 and be ultimately connected to scan room interface circuit 46, scan room interface circuit 46 receive with the state of an illness and magnetic resonance into
The signal as caused by system related sensor.By scan room interface circuit 46, patient positioning system 48 receives instruction, mobile
Patient is scanned to specified location.
Gradient waveform caused by impulse generator module 38 is applied to the gradient amplifier system 42 with Gx, Gy, Gz,
Each gradient amplifier excites a corresponding gradient coil in gradient coil set 50, produces for generating additional space coding letter
Number magnetic field gradient.Gradient coil set 50 is a part for magnetic assembly 52, and magnetic assembly 52 also includes polarized magnets 54 and body is penetrated
Frequency coil 56.Pulse caused by transceiver module 58 in control system 32 is amplified by radio frequency amplifier 60, passes through transmission/reception
Switch 62 is coupled with radio-frequency coil 56.The signal that the atomic nucleus being excited in patient body is sent is perceived by radio-frequency coil 56
Arrive, preamplifier 64 is then transferred to by transmission/reception switch 62, the magnetic resonance signal of amplification passes through transceiver module 58
Acceptance division be demodulated, filter, digitized processing.Transmission/reception switch 62 can be by the signal of impulse generator module 38
Control, so as to be electrically connected with radio frequency amplifier 60 and radio-frequency coil 56 in the transmission mode, in the receiving mode, before electric connection
Put amplifier 64 and radio-frequency coil 56.Transmission/reception switch 62 can send out single radio-frequency coil (such as surface coils)
Used under the pattern penetrated and received.
The magnetic resonance signal that radio-frequency coil 56 is collected is digitized processing by transceiver module 58, is then communicated to control
Storage module 66 in system 32 processed.After the one group of original k- spatial data of acquisition of module 66 is stored, the end of scan.Original
K- spatial datas are rearranged into the corresponding individually k- space data sets of reconstructed image, each k- spaces with each
Data group is input into array processor 68, combines magnetic resonance signal after carrying out image reconstruction, forms one group of view data, image
Data are transferred to computer system 20 by serial connection 34, and are stored in storage device such as hard disk 28.Sent out with console 12
The instruction gone out is corresponding, and described image data can store for a long time, such as is stored on magnetic disc 30, or by image at
Reason device 22 is further processed and is sent to console 12, and is shown on display screen 16.
Fig. 2 be the present invention it is a kind of be used for magnetic resonance system in image brightness control system, it include reconstruction module,
Searching modul, setting module, computing module and conversion module.
Module is rebuild, the signal for merging receiving coil is rebuild to obtain original image.
Wherein, it is image processing module 22 described above to rebuild module.The original image is a serial image,
One serial image refers to obtain the image of DICOM images after same luminance factor is converted.
Searching modul, for searching the brightness range [Smin, Smax] of original image.
Wherein, the function of searching modul is completed by CPU modules 24 described above.In internal memory, the brightness of image
Value is typically exactly to be stored with array.The brightness range of original image is calculated by traveling through whole array, comparing two-by-two
[Smin, Smax].
Setting module, for setting brightness limit value F, wherein F ＜ 2N, and F takes positive integer, N is the digit of image.
Wherein, setting module can input the brightness by the keyboard on console 12 and/or other input equipments 13 and limit
Value F.When display screen 16 is touch-screen, brightness limit value F can also be set by display screen.
Computing module, for calculating luminance factor α, α=F/ (Smax-Smin).
Wherein, computing module is a module in CPU modules 24.
Conversion module, for utilizing formula Id=α * Ir, original image is changed into DICOM images, wherein, Id is
The brightness of DICOM images, Ir are the brightness of original image.It is arranged such, by calculating luminance factor automatically, it is ensured that image
Luminance signals portion overflows, while can also utilize the maximum gray scale order range of magnetic resonance DICOM images to greatest extent.
Wherein, conversion module is a module in computer system 20.
In the present embodiment, Smin=0, N=12, F value can be set according to the preference of user, wherein, F values
Default value takes 4095.
Fig. 3 is a kind of brightness adjusting method of image being used in magnetic resonance system of the present invention, and it includes：
The signal for merging receiving coil is rebuild to obtain original image.
Search the brightness range [Smin, Smax] of original image.
Set brightness limit value F, wherein F ＜ 2N, and F takes positive integer, N is the digit of image.
Calculate luminance factor α, α=F/ (Smax-Smin).
Using formula Id=α * Ir, original image is changed into DICOM images, wherein, Id is the brightness of DICOM images,
Ir is the brightness of original image.
One embodiment of the present invention is the foregoing is only, is not all of or unique embodiment, this area is common
Technical staff is the present invention by reading description of the invention any equivalent change for taking technical solution of the present invention
Claim covered.
Claims (10)
1. a kind of brightness control system for the image being used in magnetic resonance system, it is characterised in that it includes：
Module is rebuild, the signal for merging receiving coil is rebuild to obtain original image；
Searching modul, for searching the brightness range [Smin, Smax] of original image；
Setting module, for setting brightness limit value F, wherein F<2N, and F takes positive integer, N is the digit of original image；
Computing module, for calculating luminance factor α, α=F/ (Smax-Smin)；
Conversion module, for utilizing formula Id=α * Ir, original image is changed into DICOM images, wherein, Id schemes for DICOM
The brightness of picture, Ir are the brightness of original image.
2. the brightness control system of image as claimed in claim 1, it is characterised in that：The brightness minimum value of the original image
Smin is 0.
3. the brightness control system of image as claimed in claim 1, it is characterised in that：The digit N of the original image is 12.
4. the brightness control system of image as claimed in claim 3, it is characterised in that：The brightness limit value F of the original image
Default value be 4095.
5. the brightness control system of image as claimed in claim 1, it is characterised in that：The brightness array of the original image
Storage, by traveling through the array, by comparing to obtain the brightness range of the original image two-by-two.
6. a kind of brightness adjusting method for the image being used in magnetic resonance system, it is characterised in that it includes：
The signal for merging receiving coil is rebuild to obtain original image；
Search the brightness range [Smin, Smax] of original image；
Set brightness limit value F, wherein F<2N, and F takes positive integer, N is the digit of original image；
Calculate luminance factor α, α=F/ (Smax-Smin)；
Using formula Id=α * Ir, original image is changed into DICOM images, wherein, Id is the brightness of DICOM images, and Ir is
The brightness of original image.
7. the brightness adjusting method of image as claimed in claim 6, it is characterised in that：The brightness minimum value of the original image
Smin is 0.
8. the brightness adjusting method of image as claimed in claim 6, it is characterised in that：The digit N of the original image is 12.
9. the brightness adjusting method of image as claimed in claim 6, it is characterised in that：The brightness limit value F of the original image
Default value be 4095.
10. the brightness adjusting method of image as claimed in claim 6, it is characterised in that：The brightness number of the original image
Group storage, by traveling through the array, by comparing to obtain the brightness range of the original image two-by-two.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1115628A (en) * | 1993-07-22 | 1996-01-31 | 株式会社岛津制作所 | Magnetic resonance imaging apparatus |
| CN1964431A (en) * | 2005-11-07 | 2007-05-16 | 川崎微电子股份有限公司 | Image data processing apparatus and method of processing image data |
| CN101035195A (en) * | 2006-03-08 | 2007-09-12 | 深圳Tcl新技术有限公司 | Adjusting method for the image quality |
| CN101298996A (en) * | 2008-05-28 | 2008-11-05 | 中国科学技术大学 | Method for modulating sensitivity of infrared thermal image imaging instrument |
| CN101495027A (en) * | 2006-07-10 | 2009-07-29 | 皇家飞利浦电子股份有限公司 | System and method for DICOM compliant display of ultrasound images in varying ambient light |
| CN101498773A (en) * | 2008-01-29 | 2009-08-05 | 西门子（中国）有限公司 | Method and apparatus for improving image brightness uniformity |
| CN101578855A (en) * | 2008-08-28 | 2009-11-11 | 香港应用科技研究院有限公司 | Digital image enhancement |
| CN102339461A (en) * | 2010-07-27 | 2012-02-01 | 夏普株式会社 | Method and equipment for enhancing image |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004159986A (en) * | 2002-11-14 | 2004-06-10 | Fuji Photo Film Co Ltd | Liquid crystal display device |
| WO2005109391A1 (en) * | 2004-05-11 | 2005-11-17 | Koninklijke Philips Electronics N.V. | Method for processing image data |
| WO2006123290A2 (en) * | 2005-05-18 | 2006-11-23 | Koninklijke Philips Electronics N.V. | Image processor comprising a contrast enhancer |
-
2012
- 2012-12-26 CN CN201210575940.4A patent/CN103901378B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1115628A (en) * | 1993-07-22 | 1996-01-31 | 株式会社岛津制作所 | Magnetic resonance imaging apparatus |
| CN1964431A (en) * | 2005-11-07 | 2007-05-16 | 川崎微电子股份有限公司 | Image data processing apparatus and method of processing image data |
| CN101035195A (en) * | 2006-03-08 | 2007-09-12 | 深圳Tcl新技术有限公司 | Adjusting method for the image quality |
| CN101495027A (en) * | 2006-07-10 | 2009-07-29 | 皇家飞利浦电子股份有限公司 | System and method for DICOM compliant display of ultrasound images in varying ambient light |
| CN101498773A (en) * | 2008-01-29 | 2009-08-05 | 西门子（中国）有限公司 | Method and apparatus for improving image brightness uniformity |
| CN101298996A (en) * | 2008-05-28 | 2008-11-05 | 中国科学技术大学 | Method for modulating sensitivity of infrared thermal image imaging instrument |
| CN101578855A (en) * | 2008-08-28 | 2009-11-11 | 香港应用科技研究院有限公司 | Digital image enhancement |
| CN102339461A (en) * | 2010-07-27 | 2012-02-01 | 夏普株式会社 | Method and equipment for enhancing image |
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