JPS62117079A - Picture processor - Google Patents

Abstract

PURPOSE:To improve the diagnosing performance for pictures by using the 1st converting means that converts the data on a memory means based on a certain or/and the 2nd converting means that converts the data read out of the memory means based on a certain relation and sends it to a display means. CONSTITUTION:A display control part 612 controls a picture memory 616 and extracts data via a high-speed picture data bus 618 to display them on a CRT. Two look-up tables are prepared for CRT-A64 (LUT-A) and CRT-B65 (LUT-B) and the conversion of density is possible without changing the picture data at all by using both tables LUT-A and LUT-B. While the part 612 magnifies pictures for finer observation of a part of pictures. In addition, the part 612 has the function to select independently whether the 1st or 2nd screen of the memory 616 is displayed on the table CRT-A64 or CRT-B65 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a processing device for diagnosing X-ray images used in the medical field. The present invention relates to an image processing device for visual observation.

(Background of the Invention) Conventionally, in the medical field, image diagnosis has meant observing film images taken by X-rays by hanging them on a scanner. However, ordinary X-ray film is difficult to observe due to the pursuit of techniques for observing the diagnostic site11.
! It is set to create a contrast of 1.0 to 1.6D in the culm area, and if the shooting conditions are slightly off, it will easily be overexposed or the exposure will be too low, depending on the image interpretation. Not only did this have a negative impact on diagnosis, but it also required re-examination, increasing the patient's exposure to X-rays.Furthermore, since the subject contrast and diagnostic purpose differed depending on the diagnosis area, different films were used for each area. There were 41 people in total, and managing them was becoming increasingly troublesome.

However, with the development of computers in recent years, computerization has become widespread in the medical field as well.In the field of image diagnosis, this trend is also rapid, and various types of C'r, ultrasonic diagnostic equipment, radio The spread of diagnostic equipment that uses isotopes is remarkable.As a result, the concept of ``comprehensive image diagnosis'' has arisen, which connects various diagnostic equipment with computers and attempts to comprehensively diagnose various modality images. did it. However, X-ray film images are essentially analog images, and although they are most frequently used in diagnostic imaging and are often regarded as important, they have not been well integrated into comprehensive diagnostic imaging. Undiagnosed 1! This has become an obstacle to the computerization of t.

(Objective of the Invention) The object of the present invention is to maintain the quality of analog images inherent in X-ray film images, without unnecessarily increasing the information vP:tm when digitizing Xi images, and An object of the present invention is to provide an image processing device that improves image diagnostic performance by making the most of the advantages of digital image processing.

(Structure of the Invention) An image processing apparatus according to the present invention includes an image manual means for scanning an image having gradation and converting it into time-series digital values, and a storage means for directly storing the time-series digital values. , a display means for reading out and reproducing and displaying the data in the storage means, and a first conversion means for converting the data in the storage means based on a certain relationship, and/or a first conversion means for converting the data in the storage means based on a certain relationship; and a second conversion means that converts the information based on a certain relationship and sends the converted information to the display means.

(Embodiment) FIG. 1 is a block diagram of a medical image system including an image processing apparatus of the present invention. A central processing unit 10, an image processing device 1 according to the present invention, an image diagnostic device 13, etc. are connected to the network 9. The central processing unit lO is
A processing unit 11 that controls the entire system and manages an image database, and an image file unit 12 that stores image data.
It becomes more. The image processing device @ 1 exposes an unexposed X-ray film 3 to X-rays generated by a normal X-ray device 2 that have passed through the patient and reached a temperature of °C, and develops the X-ray film 4 (
A film scanner 6 for digitizing X-ray film (hereinafter referred to as X-ray film), a console 6 having functions for processing, displaying, and transmitting data digitized by the film scanner 5 through a network 9; It consists of a laser film printer 7 for making a hard copy of image data. The printer film 8 exposed by the laser film printer 1 is
It is processed and used for storage, diagnosis, or sent to other departments. The image diagnostic device 13 may be a C'r device, an ultrasonic diagnostic device, or, of course, the image processing device C of the present invention.

FIG. 2 is an external view of the image processing apparatus 1, in which a film scanner 7-6, a console 6, and a laser film printer 1 are each shown as units. Film scanner δ is a single unit, so
It can be used in a place where it is easy for the operator to operate. The console 6 has a film viewer 63 and two CRTs (CRT-A64.CR1'-
865), are installed side by side. The exterior surrounding the CRT also serves as a light shield and protrudes forward like a hood.
There is.

Below CR'1', a monitor 622 for the man-machine interface is installed diagonally so that it is easy for the operator to see.The console in front of the monitor 622 has a mouse 625. , most of the normal operations are
It is possible to use the mouse 626 while watching the monitor 622. A keyboard 624 is also connected, but normally only a mouse 625 can be operated, so it is stored in a storage cabinet.

The optical disk device 66 is housed in 1- of the right operation console so that the operator can easily insert and remove the C optical disk. Although the laser film printer 7 is shown installed next to the console 6 in the figure, since it is a separate unit, it may be installed near the film developing machine by extending the Internoace cable. Further, since the console 6 is quite large, in order to improve the ease of carrying it in, the CR'l' portion can be divided, and the lower part of the console 6 can also be divided into left and right halves.

FIG. 3 shows a four-part diagram of the film scanner 6.

The X-ray film 4 is conveyed along a path as shown by a film conveyance path Pa. Film Scanner J-5
typically digitizes 14 degrees θ~4D of the X-ray film 4 into IO bits. This is a sufficient range of Xa degrees in terms of the performance of an X-ray noilum, and has sufficient resolution compared to the concentration resolution of the naked eye. Furthermore, depending on the state of the X-ray film 4, 0 to 2D, 1 to 3D, 12 to 4
It is also possible to limit the degree range of 1) and digitize to C, 10 bits. Furthermore, it is also possible to convert the transmittance of the X-ray film 4 to C linearly into 10 bits. These five types of reading modes, including the normal reading mode, can be selected using a switch.

This makes it possible to perform even finer concentration resolution and digitize X-ray exposure amplifiers and overexposed films with sufficient precision.The film scanner 5 detects the film size at the insertion slot. , determines the pixel size when quantizing.This is because X-ray film is usually 51ff+ type film from cut-off to half-cut, but small films such as cut-off are used for limb bones and This is because breasts are often photographed, and it is necessary to express fine structures such as trabeculae and mammary glands, which requires quantization with a small pixel size.For example, this film scanner 5 100μm for important films
, C is 125 μm for the four-term film.

Is °C 1' for large eyes, large angles, and half cuts? It is possible to quantize at 6 μm, and the pixel size is automatically selected depending on the film size. As a result, the important film is 2000x2500 pixels, and the four-term film is 2000x
Digitized is 2400 pixels, large-angle film is digitized at 1580 x 2000 pixels, large-angle film is digitized at 2000 x 2000 pixels, and half-cut film is digitized at 2000 x 2450 pixels. The X-ray film 4 is irradiated with a laser beam of constant intensity scanned by a laser scanning section 51 while being conveyed.

The stability of laser light intensity has an immediate effect on image quality, so it is necessary to use a laser with good stability or to install a stabilizing device. Here, Uniphase's qJ\lium neon laser l 105P (5 mW, maximum noise 0.1%
rms (lkH2-10MHz)).

In addition, the power supply for the laser is also an important issue for the stability of the laser light intensity, but in the film scanner 6,
It uses an AC step-up power supply, and its stability is
)ing. The helium neon laser causes a drift in the output, but the film scanner 6 scans the X-ray film 4 on a curved surface for reading 1ilJi image information (when it is not at the 1'7 position, the calibration of the density O is performed at t'r- If you use a laser with a lot of noise, detect the laser light intensity Jω and use an intensity modulator such as 80M or EOM to adjust the laser light intensity. In addition, when using a semiconductor laser, direct modulation is possible, so in order to stabilize it, it is sufficient to apply feedback to the curved coupling of the laser driver to stabilize the C. , The same applies to the laser film printer described later.The laser light irradiated to the X&!
Its transmitted intensity is modulated. The laser beam transmitted through the X-ray film is converted into an electric signal by a multiplier 541 built in the light receiving section 54. The electrical signal is converted into time-series digital values by the electrical processing section 56.

FIG. 4 shows the structure of the console 6. Console 6 is
1 part, lower left, lower right; Consists of 3 parts, the upper part is -
)t Rumbi: t-'763, CRT-A64, CR'l
'-)365. The left r section is the keyboard 62
4. At the lower right corner where the monitor 622, mouse 625, CPυ62I, and magnetic disk 62;3 are arranged, an optical disk device 66 and an image controller [;[,] are arranged. The first part, the lower left part, and the lower right part have a structure that allows them to be moved by 811 minutes, respectively, in order to improve the ease of transport.

FIG. 6 shows a block diagram inside the console 6. Broadly speaking, the console 6 is in charge of the man-machine interface with the operator, the controller 62 is used to control the entire image processing device, and the controller 62 is used to process, store, and transfer image data according to instructions from the controller. Image controller 1-U-ra [Me 1, digital value i
ll Two CH'l' units (CRT-A6) for live display
4. It consists of a CRT-Be5), a film 11 for viewing the X-ray film 4, a viewer 63, and an optical disk device 66 for locally storing image information.

Further, the second controller 62 is composed of a magnetic disk 623, a monitor 622, a mouse 625, and a keyboard 624, with the center located at 0-1J621.

The image controller 61 also includes a high-speed image data bus 6
18 and a control bus 619, the communication control unit 6 controls the interface with the external network 9.
111 A scanner control unit 617 that controls the interface with the film scanner 5; an image processing unit 614 that processes the image according to the image data, a display control unit 612 that reads data from the image memory 61B and reproduces and displays it on two CR'rs while converting it to C' using a lookup table; and an optical disk device 6. (3
The printer controller 61 includes a storage control section 615 for interfacing with the laser film printer, and a printer control section 61; 3 for interfacing with the laser film printer.

The image memory 616 has a capacity sufficient to store the image data of the xi film as is. Here, the image data of the film scanner 5 has a maximum size of 2000 x 2500.
pixel xlOpi)-(f, so l-j mega lead
There is C' which has memory for two screens with 10 bits.

The display control unit 612 controls the image memory [i 1 B to retrieve data via the high-speed image data bus 61B,
The resolution of C1(T is 1024 x 1280 pixels, and the maximum resolution is 2000
2 Since it is not possible to rectangularly display the entire 500-pixel original image, the
When image data is read out and displayed, the entire image is displayed by reducing the image data by 1/2 vertically and 1/2 horizontally. There are various reduction methods such as thinning processing and averaging processing, but averaging processing is superior in terms of image quality. In addition, since the table 71 of CR1'11'LW's die J ~ min range) is hot, 1O (only about 1 gradation can be displayed, so 10-bit image data is stored in the built-in look)' is converted to 8 bit. This lookup table is for CR1'-A64 (LU'l'-
A) and for CR'I'-1365 (1, IJ'r-B>
03. There are two. These LU'l'-A and LU i
'-B and Reelco make it possible to perform density conversion processing without changing the image data at all. In addition, the display control unit 6m2 performs image enlargement processing to allow the J car 1H to observe a part of the image in more detail.

For enlargement processing, 2x, 4x, 6x, and 8x are available. Regarding the double processing, since the normal size is reduced to 1/2 and displayed in °C, the specified 10 in the image memory 61B is
Displays 24x1280 pixel data as is. For 4x, 6x, and 8x, one pixel of the image screen is 2x2
Pixel: 3 x :3 pixel, 4 x IL pixel. With 4x C, the pixels are not very visible in CRi'It, so image quality is hardly a problem. The enlargement processing of 6 times and B times is not very meaningful as the magnification is too large to be seen as a film image. However, 512x like CT, US, Ri etc.
Li12 pixels, 256x25B pixels, 128XI2L (
When an image such as a pixel is sent through the communication control unit 611 (R), it becomes φg17-(, j+l+i
The image data is too small, so set it to L to make it easier to observe.
J! In 11 Sho:9, up to l1 times is sufficient. When enlarging an image, the entire image cannot be displayed, so use the scroll function to move the image vertically and horizontally.JiJI 1
+1 I am writing to fii.

This is done by changing the start address of the display field f9i in the image memory (316).The display control unit 612 also changes the start address of the display field f9i in the image memory (316).
CR'[' A (i
It also has a function to select whether to display on 4 or CR'l'-1365.

The image processing unit 614 performs frequency processing on the data in the image menu 616, rotates, moves, reverses [-, T'' horizontally, calculates statistics such as histogram, average IBM, variance, etc., and processes the data in the image memory 616. [The image processing unit 614 has a 6 megaread x 20 bit work memory. .2
With a data width of 0 bits, the number of calculations (N) will be poor depending on the processing, but the memory cost will be high, so from the viewpoint of image quality, this bit [1] is selected. However, the bit width is 32
Zero frequency processing, which can be expanded to bits, is performed by convolution calculation.

First, the weighting coefficient matrix A (i, j) of convolution based on frequency processing (i = − to ~ ■ (integer +
, I"t ~ [integer), and clear the work memory to 0. Add a weighting coefficient A (L, + )
Multiply ゛C work memory data W (In+i,
n+j) and add °C to new W (rJ++ i
, n+j) and store 64 memories in the work memory. After performing this operation for one screen, change L or l.
C Try again. This operation is (2Lc+1) (21+1)
Finally, the weighting coefficient A is added to the data in the work memory.
When multiplied by the reciprocal 1/S of the total sum S of (++, i), image data subjected to predetermined frequency processing is stored in the work memory, so this is transferred to +1lji image memory Iυ.

If the convolution weighting factor 7 trix is increased, the calculation time will become very large, so it should be set to 15x1.
Limited to size 5. Furthermore, in order to save calculation time, calculations are skipped when A(i,,1)=00. Since the size of the weight coefficient matrix is limited, only high frequency components can be processed. By emphasizing high frequency components, it is possible to obtain images similar to xeroradiography, which has the effect of making it easier to see minute lesions with low contrast, but Since a pseudo image also appears at the same time, it is important to compare it with the original image when using it for diagnosis.Rotation, movement, and horizontal/vertical reversal of the 0 image are performed after transferring it to the work memory. This is done by calculating the address of , and sequentially transferring data of the pixel closest to the address of the calculation result to the image memory 616. Image rotation and movement are effective for performing linear arithmetic processing and stitching between two images, subtraction for C1 contrast imaging, and dual energy subtraction. In addition, vertical and horizontal reversal is essential when inserting the X-ray film 4 into the film scanner 5 in the wrong direction. The histogram is calculated in one step by counting the transferred image data for each value.
This is sent to the controller 62 where it hisses!・The C display control unit 61 is calculated for Gellum equalization.
1 out of 2. Rewrite Ui'-A or L U i'-8. Naturally, histograms, average values, and variance values are also used by operators when analyzing images.

Image data compression is performed by compressing data from the image memory 61 (3 to 1).
After being transferred to the node memory and subjected to compression processing, it is sent to the storage control unit 615 for saving in the optical disk device 66 or sent to the other image diagnostic apparatus 1 via the network 9.
3 and is sent to the communication control unit 611 for communication.

Next, the controller 62 will be explained. The controller (32 is centered around a CPU 621, and includes a magnetic disk 62', 3, which stores software such as software for controlling the entire device and data of various tables, a mouse 625 for man-machine interface, and a keyboard 62). /↓, and monitor 622.Monitor 622
The operation menu and cursor are displayed at h, and j
While moving the cursor with the mouse 625, Bellator
Actions are instructed by selecting the action menu.

However, when communicating image data through the network 9 or when saving or loading image data to an optical disk device (36), the
When it is necessary to enter the necessary information manually, the stored keyboard 624 is brought out onto the operating table and the necessary information is entered manually.

Display control unit 612 + 7) LU
'l'-A, LUT-B (7) There is an S ability to manage multiple data. The number of table data that can be managed is 20, of which 10 are for initial registration and are set at the time of installation of this device, so operators other than the system administrator cannot change them, but the remaining 10 are for general registration. Any operator can also make changes. The change method is to display the L U '[' data creation graph on the monitor (3221-) of the controller 62. At this time, the graph shows the current CRT-A
E; As soon as the data related to l and U'r of the image displayed in 41- is displayed, it is obvious that the CRT
-HC; It is also possible to switch to what is displayed in 5. When you change the °CC shorthand graph using the mouse 625, the data is immediately transferred to the display control section [312
Ij) i' -A or L U i' -B, and the density of the displayed image can be converted almost in real time. Therefore, the operator is CR1”J-.

You can create optimal data by changing the data in the table while observing the displayed image.

If this data is registered as lookup table data for the operator with a shorthand table name, the same density conversion process can be performed next time simply by selecting it. You can also register two of these 20 daple data as (J'l'-ASf3(J) initial setting.If you do this, LU'r
- No matter what state A or B is in, it is a simple operation to not return to the initial setting 11a, and it is extremely effective when using this image processing device on a routine basis. be. These 20 lookup table data and initial setting flags are stored in the magnetic disk 623. The monitor 622h also displays the two L
Grab any of the UT data anytime and display it on C-ζF
This makes it easy to check. Further, the brightness of the CRT and the brightness of the film viewer 6:3 can be controlled using the mouse 626.

This selects the brightness specification operation and the film viewer 63
Specify which of the two ctt 'i' to adjust the brightness, and move the mouse 625 left or right, the control signal sb or SO, SC' will change accordingly, and the brightness will change according to that signal. Con) L: J-ru is done.

The two CRTs 64 and 65 are equipped with anti-IA +h filters on their surfaces in order to reduce the negative effect on image quality due to reflection of external light on the surfaces.

Currently, the anti-reflection filter is Toshi E Filter■
I use C. This is because there is almost no surface reflection of the filter and the transmittance is 50%, so the brightness of CR'r is halved, but the contrast is improved by about twice.
There is C. Also, the light from the film viewer 63 is CR71'
The CRT has a hood to prevent you from looking directly at it. The CRT has horizontal synchronizing signals Sb (Sh'), j
lB, direct IBIJI11 signal 5v (SV'), analog video signal VD (VD"), brightness control signal Sc
(Sc'), this voltage can be controlled by the CPU 621, and the brightness of CR'r can be adjusted according to instructions from the operator. However, for operators who wish to manually adjust the brightness, it is also possible to vary the brightness using a knob on the CR'1'' panel by switching an internal switch.

The film viewer 63 has two fluorescent lights inside, which are turned on by AC power. CI) When the control signal Sa from U621 is off, or when no film is loaded and the film detection switch is off, the AC power source is not turned on. Sa turns on,
Moreover, when the film is attached, the detection switch is turned on and the AC power source is turned on. Normally, Sa is in the on state, so the ``no-ilm viewer 63'' turns on or off when a film is attached or removed. Further, the control signal sb is a phase control signal of the AC power source, and the brightness of the film viewer (i; 3) can be controlled from the CPU 621.

The optical disk device 66 processes the data in the image memory 616 using the image processing unit 614, and inputs the patient name and patient ID.
It is stored together with code information such as the code, shooting date, and storage date, as well as the lookup table data being used for display at that time. The user ID information will be used later when searching for an image. No matter how much image data is compressed, the image data is several hundred kilobytes to one megabyte, so searching by image requires a heavy burden on the operator, and searching by second-order information is difficult. This is to do so. Here, we have decided to input the code information using the keyboard. The reason why the lookup table data is stored together is to enable the image in the stored state to be displayed as it is when displaying the retrieved image on CR'I'. When saving to the optical disk device 6G, if the data in the image memory 616 is transferred to the work memory of the image processing unit 6I4, the next processing can be performed. While memorizing, the operator will not be kept waiting. However, when loading image data from the optical disk device 66, the operator is kept waiting while reading from the optical disk and reproducing compressed data. However, compared to the case without data compression, the waiting time is considerably shorter. If image data is stored in its raw form on an optical disk, the data will be 6 megawords or about 6.3 megabytes, and it will take about 30 seconds with optical disk device #66, which has an effective reading speed of only 200 kilobytes/second. However, when compressed to 1/20th of a page, the reading time is 1°5 seconds,
Since the regeneration time and the °C temperature are about 10 seconds, it becomes practically usable.

Next, the laser film printer 7 will be explained.

FIG. 6 shows the internal structure of the laser film printer 7. The laser film printer 7 has a supply magazine section 7.
The unexposed printer films 8 stored in
Next, while receiving and receiving image data from the printer control unit 613, the laser beam scanned by the laser scanning unit 7δ is scanned by a signal based on the image data. As the flatbed moves, the laser scans and exposes the printer film 8 that moves in the military direction.

When the flatbed moves to the end, the laser scanning ends and the exposure of one screen also ends. The exposed printer film 8 is removed from the flatbed, passed through the conveyance section 72, and stored in the C-screen magazine section 74. This completes the recording of one screen. The supply magazine section 71 can store 50 sheets of unexposed printer film 8, and can meet continuous printing requests. Up to 60 sheets can be stored in the receive magazine section 74 for exposed printers.
After printing an appropriate number of sheets, remove the film from the laser film printer 7 and develop it using the C1 developing machine. The laser film printer 7 uses a helium-neon laser, and the wavelength is 633nfxl, so it uses a film sensitized to red.Also, the laser film printer 7 uses a helium-neon laser, and the wavelength is 633nfxl, so it uses a film sensitized to red. , AOM with i14 device and [)
is used, so the dynamic range of modulation is 10
00:l, practical t-, about 600:1. Since a laser is used, the requirements for sensitivity are not very strict. A characteristic curve of a film having such characteristics is shown in FIG. FIG. 7 also shows the modulation characteristics of the optical modulator used in the laser film printer 7. It goes without saying that this printer film 8 can be developed in the same manner as ordinary X-ray film. For example, automatic developing machine VX-400 (manufactured by Konishiroku Photo Industry Co., Ltd.), developer X1)-90 (manufactured by Konishiroku Photo Industry Co., Ltd.), tailing agent XF (manufactured by Konishiroku Photo Industry Co., Ltd.), By using the combinatorial method and processing in 90 seconds,
Such characteristics can be obtained. laser film printer 7
Since the purpose of this is to print the image displayed on the CRT, the printer control unit 613 is provided with a lookup table (LU
'l'-C) and has the same characteristics as the data in the CR1' display lookup table LUT-A or B. The laser film printer 7 also includes a lookup table (L) for correcting the density characteristics of the printer film 8.
LU'l'-P) is built-in. LU'l'-C is a 10-bit manual output, and LU'l'-A
Or more accurate than B. This is because Phil 11 has a higher C.
Since the contrast resolution is higher than that of R'1, LU'l
'The accuracy of ' has been improved. When printing an image displayed on a CRT using the laser film printer 7, from LU'r-A or LU1'-B to LU'r
After moving the data to -c, smoothing processing is performed to minimize the rounding error at that time.

L U 1'-1) has a structure of 10-bit manual output and 12-bit output, so that even if the characteristics of the printer film 8 are slightly distorted, the density gradation is not lost.

The operation of the image processing device 1 will be described below.

The operator heads to the console 6 and enters the CI 4, and while following the operation menu displayed on the monitor 622, operates the mouse 625 on the console to give operation instructions to the C5 image processing device. First, the operator inserts the X-ray film 4 through the insertion opening of the film scanner 5 and instructs the controller 62 to digitize the image. At this time,
At the same time, specify the CR'l'' whose images you want to display.Here, assume that you have specified CRT-A64.Of course,
It is possible to specify CRT-865 or both. The controller 62 instructs the display control section 612 to erase the screen of CR'l'-A64 to black, and issues an instruction to the scanner control section 617 to receive data. Then, film scanner 5 reads x&! Digitizing the film 4 is started, and the data is sequentially passed through the scanner control section 617 and stored in the image memory 61B, and at the same time, the data is sent to the display control section 612') CR'1' -
A 64 h (i: Continues to display. Therefore, the image display is completed almost at the same time as the film scanner 6 completes digitizing and the X-ray film 8 is ejected. Also, the displayed image is Data is stored in the image memory 616 at the center of the displayable position of the CRT. When the operator attaches the ejected X-ray film 4 to the film viewer 63 placed next to the CR1, the power to the film viewer 63 is turned on and the X-ray film 4 can be observed. Based on the image on the X-ray film 4, the operator can enlarge the CRT image, scroll the image, shift the density, increase the contrast, change the spatial frequency, etc. to see the location in more detail. The diagnosis is confirmed while pasting together the original X-ray film image and the Cf ('l'l-) image by converting the characteristics. Of course, the line film 4 may be a normal one.A normal film has high contrast in the 1.0-1.5D density range, where the naked eye can easily distinguish the density, but in other density ranges, it has a high contrast. , the contrast is low and the density discrimination ability is also reduced, making it extremely difficult to see °C. Therefore, by using this image processing device, you can adjust the density and contrast of the location you want to observe to your preference, making it more effective. However, by taking advantage of the capabilities of this device,
In addition, for effective use in diagnosis, it is effective to use a film with characteristics such as a low γ value, good linearity, and a wide dynamic range, as shown by the solid line in FIG. 8. At this level, the diagnostic performance with the naked eye is not much different from that of conventional films with high γ1 directivity (dashed line in Figure 8), but the dynamic range is wide, especially in high density areas and low density areas. This is because as the range increases, the amount of shooting information increases, the shooting conditions become more relaxed, and the latitude becomes wider. If this film is used, the sensitivity is almost the same as that of conventional ortho-based film, so the X-ray imaging equipment used in regular hospitals can be used as is, and at the same time, patients will be less exposed to X-rays. Since there is no change, the negative impact on patients will not increase. In addition, the spatial frequency characteristics (M'l''F) and graininess are sufficient to cover the conditions of the film scanner 5, such as the pixel size and beam diameter. In terms of properties, the film maintains a surface condition that makes it difficult to cause interference.Although it is preferable that the film has the characteristics shown in the solid line in Figure 8, it is not limited to this. It is preferable if it falls within the scope of the claims, and it is preferable that other characteristics and materials are those described in the patent application. Diagnosis is improved by comparing the image with the film 1LIIi image on the film viewer 61- by performing color and density conversion and making a diagnosis.
1114m of T etc. from the central processing unit lO)"(
By displaying another X-ray fill 11 image of the same patient from the optical disc device 66 with the JIX display, it becomes possible to perform a comprehensive diagnosis.

Image output devices include laser printers and ilm printers.
In addition, Image 1 can be used. The image is e
1z t "River) 'Ug signal is received, displayed on the CRT built in the imager, and exposed by projecting it onto imager soil or photographic paper. This image processing device 1 has two CR1'64°65 units, so the display control unit 6''2 has a video signal changeover switch, and the controller 62 specifies the CR'l'-
Switching between the A64(7) video signal and the CR'l'-B6b video signal is output to the C imager output terminal. Water 1' III signal, ItI: direct 111
The 4 signals are the same for the two CIs ('r), so there is no need to switch between them.The sensitivity and characteristics of the imager differ depending on whether it is exposed to film or photographic paper, so when installing the iJ!I Arrange and go to 6 [↓“ru.

(Effects) The present invention makes it possible to digitize X-rays with sufficient concentration resolution and spatial resolution.
Even when each image insertion process is performed with R'I'j-, it is now possible to obtain an Iil+i image of sufficient image quality. Furthermore, CHi'
By having two units, it became possible to simultaneously observe processed images of 24 °C and 4 °C at normal temperatures, improving diagnostic ability. Further: Shita, Film Beautiful 1. It is possible to diagnose flji' by comparing the two digital images, 1-, the processed one;
l:, making it possible to obtain extremely accurate and accurate diagnoses. Furthermore, by incorporating the film view controller and CR1', it becomes possible to centrally control the brightness of each with the controller ':1', and it becomes possible to reduce the burden on the operator. This image processing device υ is a single I! 1(
Even when used in Imaging diagnosis becomes an iJl function.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a block diagram of a medical image diagnosis system including an image processing v21 meter of the present invention, Fig. 2 is an external view of the image processing device of the present invention, and Fig. 3 is a film Structure diagram of the scanner,
Figure 4 is a structural diagram of the console, Figure 5 is an internal block diagram of the console, Figure 6 is a structural diagram of the laser film printer, and Figure 7 is the characteristic curve of the printer film and the characteristics of the optical modulator. FIG. 8 shows characteristic curves 1'1 of the conventional film and the X-ray film for image processing apparatus J of the present invention. 5- Film scanner 6- Console'? -Laser film printer 6; 3-Film viewer /L, 5-CR'l' 66-Optical disk device Patent applicant Konishi Roku Photo Industry Co., Ltd. Figure 7 A4 ¥ ticket inspection)

Claims (1)

[Claims] 1) Image input means for scanning an image with gradation and converting it into time-series digital values; storage means for receiving and storing the time-series digital values; and reading and reproducing the data in the storage means. a first converting means which converts the data in the storage means based on a certain relationship, and/or a second conversion means which converts the data read from the storage means based on a certain relationship and then sends the converted data to the display means. An image processing device characterized by having a conversion means.