JPH03218727A - Medical data accumulation management communication system - Google Patents

Abstract

PURPOSE:To protect the patient information from wiretapping and falsification of information by adding not only communication line encoding but also information source encipherment. CONSTITUTION:First of all, with respect to image data, information source encipherment is performed by an enciphering device 8, communication line encoding is executed by a communication line encoder 10, and its data is modulated 12, and thereafter, transmitted to a communication line 14. On the reception side, first of all, the data is demodulated 13, and thereafter, communication line decoding is executed by a communication decoder 11, information source decoding is performed by a decoder 9, and the data is returned to original image data. For instance, in the case of a single character conversion type cipher, at the time of enciphering the data, key codes a0, a1, and a2(43) in common as a medical image accumulation management communication system are given to the enciphering device 8, and inputs d0, d1-d7(41) to the enciphering device are enciphered. At the time of decoding the data, with respect to inputs f0, f1-f7(46) to the decoder 9 from the communication line decoder 11, key codes a0, a1, and a2(43) in common as the medical image accumulation management communication system are given to the decoder 9, and outputs e0, e1-e7(45) are decoded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to, for example, digitized X-ray film images and CR
This system relates to a system that collects, stores, manages, and communicates medical data such as images, CT images, and MR images, and protects the data from eavesdropping and data modification when communicating medical data, and manages the medical data safely. Regarding technology. [Prior art] Conventionally, for example, an X-ray imaging device, an X-ray tomography device,
Digital subtraction angiography device,
Until now, medical images from nuclear magnetic resonance systems and other devices have often been stored on film. However, although there are differences between hospitals, the number of films produced each day is large, and a large storage space is required to accumulate these films.
Managing it was also a difficult task. Further, it takes a lot of effort and time to extract a desired image from a huge number of accumulated film images.

For this reason, systems for digitizing, recording, managing, and communicating image data obtained by the various devices described above have been put into practical use. This system records digitized image data, searches it, communicates between devices, and also calls and displays the image on an image display device.

In other words, this system handles medical data such as confidential patient image data. This confidential patient image data is also communicated between each device. However, in conventional data communications, data is transmitted by only performing channel encoding to electrically improve signal transparency.

FIG. 6 shows an example of conventional image data communication.

In Figure 6, on the transmitting side, image data is CMI (Code Mark Invers) for high reliability.
ion) code (11). Next, the signal is modulated (12) and transmitted via the communication channel (14). At this time, if an analog communication path is used as the communication path, the data is transmitted after being subjected to PCM modulation or the like.

The transmitted image data is demodulated (13) on the receiving side,
Return to CMI code. Furthermore, channel decoding (11) is performed to restore the original image data.

[Problem to be solved by the invention]

However, such channel encoding alone cannot sufficiently protect the confidentiality of data during transmission. This is because there are monitors that can monitor the state of communication channels, and using these monitors, it is possible to eavesdrop on data on the communication channels.

Therefore, if the eavesdropped data is used maliciously, there is a good possibility that the data subject will suffer damage.

The present invention aims to solve such problems.

[Means to solve the problem]

The means of the present invention to solve the above problems is realized by adding information source encryption in addition to channel coding in image data communication. That is, it is realized by a communication system that adds an information source encryption function and an information source decryption function to the conventional communication system that transmits information sources via a communication path.

Information source encryption is to use image data as an information source and change the way the information is expressed by encrypting it. Therefore, in order to perform information source encryption, a device that transmits image data and a device that receives image data are made to encrypt and decrypt data. This makes it impossible to easily restore the original information source even if data on the transmission path is intercepted. [Operation] According to the present invention, since the medical data is communicated by changing the expression method, even if the data is eavesdropped, the original medical data cannot be easily restored, so that the confidentiality of patient information can be protected.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.

First, the configuration of the medical image storage management communication system will be explained. The medical image storage management communication system includes a diagnostic device that takes medical images (for example, an X@CT device, a nuclear magnetic resonance device, an X-ray fluoroscopy device, a digital X-ray fluoroscopy device, a nuclear medicine device, an ultrasound device), A filing device that stores images taken with these diagnostic devices, a management database system that manages the stored images, and a medical image workstation that diagnoses medical images.
It consists of a network that connects each of the above-mentioned devices.

Next, Figure 3 shows the configuration of the medical image storage management communication system. Of each device, the imaging device has an energy control unit (2
0) supplies energy for generating information carriers in the information carrier generating section (21). Then, each photographing device generates an information carrier in an information carrier generating section (21). The generated information carrier is the subject (29)
is transmitted or reflected and reaches the detection section (22). The image processing section (23) creates an image based on the amount of information carriers that have reached the detection section. The image created by the image processing section (23) is recorded in the image storage section (24). Further, the image is displayed on an image display section (25) and converted into a film in an image printing section (26).

The filing device for storing images is composed of an image processing section (23), an image storage section (24), and an image display section (25), and is capable of storing and displaying a large amount of image data. A medical image workstation for diagnosing medical images is composed of an image processing section (23), an image storage section (24), an image display section (25), and an image printing section (26). It provides a diagnostic environment for (25). Each of the above-mentioned photographing device, filing device, and medical image workstation controls an image communication unit (27) with an image processing unit (23), and exchanges image data with other devices via a communication path.

Therefore, in each device of the medical image storage management communication system, the image processing section (23) and the image communication section (27) perform common processing in data communication processing.

Next, FIG. 1 shows the image processing section (23) and the image communication section (
27) An embodiment of the present invention comprising an information source encryptor and an encrypted data decryptor will be shown and explained.

The image processing unit (23) includes a CPU (1), a ROM (2)
, a RAM (3), a magnetic disk device (4), a floppy disk device (5), and a system bus (6), and the processing performed by this is the same as that of a so-called computer.

The image communication unit (27) also includes a communication buffer (7), an encoder (8), a decoder (9), and a communication path encoder (10).
, a channel decoder (11). The channel encoder (10) is connected to the transmission channel for transmission, and the channel decoder (11) is connected to the transmission channel for reception. FIG. 2 shows an example of communication of image data according to the present invention.

On the transmitting side, the image data is first subjected to information source encryption by an encoder (8), channel encoded by a channel encoder (lO), modulated (12), and sent to a channel (14).
) will be sent to.

On the receiving side, the data is first demodulated (13), then channel decoded by a channel decoder (11), information source decoded by a decoder (9), and returned to the original image data.

Next, the information source encryption method will be described.

As an example of information source encryption, an example of single character substitution encryption will be described.

Single-character substitution encryption systematically replaces a code in an information source with another code, and the key is the correspondence between the code before encryption and the code after encryption.

Next, examples of this single character substitution type cipher are shown in Figures 4 and 5.
Illustrated in the diagram.

Data is encrypted using key codes a O, a 1, a 2 (43) common to medical image storage management communication systems.
is given to the encoder (8), and inputs dO, d1 to the encoder
, ..., d7 (41) is encrypted. Encryption can be accomplished by systematically performing code conversion using an encrypted character conversion table (47) when sending data from the communication buffer (7) to the channel encoder (10). Encrypted character conversion table (47
), the encrypted codes ao, al, a2 (
43), pre-encoding image data do, di,...
, d7 (41) is the encoded image data co, cl, -
, c7 (42). This conversion table (4
7) is ROM (read only memo)
ry), RAM (random access +m
This can be easily realized using a memory device such as memory.

Data decoding is performed by inputting fO, fl, ... f7 (46) from the channel decoder (11) to the decoder (9),
Common key code a for medical image storage management communication system
o, al, a2 (43) is given to the decoder (9) and decoded into the output eo, el, -, e7 (45). For decoding, code conversion may be performed systematically using the decoded character conversion table (48) when sending data from the communication path decoder (11) to the communication buffer (8). This conversion table is also R O
M (read only memory), R
A M (random access memory)
This can be easily realized using memory devices such as .

In addition, the common key codes ao, al, a2 (43) for the medical image storage management communication system are, for example, 19891231 if the date of operation of this system is December 31, 1989. It can be created by treating it as an 8-digit number, dividing it by 8, and using the remainder as the key.

Here, we have shown an example of single character substitution encryption as an example of information source encryption, but there are other information source encryption methods such as public key cryptography, and these are used by the image processing unit (
23) can be easily realized using software.

〔Effect of the invention〕

According to the present invention, in the operation of a medical image storage management communication system, medical data is encrypted and transmitted, so that it is possible to protect patient information from eavesdropping and tampering.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of a processing system that performs encryption and decryption common to each device constituting a medical image storage management communication system, FIG. 2 is a diagram for explaining the communication method of the present invention, and FIG. 3 teeth,
An explanatory diagram of each device constituting the medical image storage management communication system, FIG. 4 is an example of an encryptor, FIG. 5 is an example of a decoder, and FIG. 6 is a diagram for explaining a conventional communication method. It is. 7... Communication buffer, 8... Encryptor, 9... Decoder, 10... Channel encoder, 11... Channel decoder, 41... Data before encryption , 42... Data after encryption, 43... Key code, 44... Control signal, 45... Data after decryption, 46... Data before decryption, 47... Encryption Character conversion table, 48...
Decoded characters are strange! Figure 2 Figure 3 Figure 5 Kasumi Rokoku l0 lf8-F

Claims (1)

[Claims] 1. In a system that collects, stores, manages, and communicates medical data, when communicating medical data, the device that transmits the medical data encrypts the data and puts it on the communication path, and the device that receives the medical data encrypts the data. A medical image storage management communication system characterized by decoding encoded data.