CN110752011A - Method for constructing DICOM server cluster - Google Patents
Method for constructing DICOM server cluster Download PDFInfo
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- CN110752011A CN110752011A CN201910984704.XA CN201910984704A CN110752011A CN 110752011 A CN110752011 A CN 110752011A CN 201910984704 A CN201910984704 A CN 201910984704A CN 110752011 A CN110752011 A CN 110752011A
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- 230000005540 biological transmission Effects 0.000 claims description 7
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- G16H30/00—ICT specially adapted for the handling or processing of medical images
- G16H30/20—ICT specially adapted for the handling or processing of medical images for handling medical images, e.g. DICOM, HL7 or PACS
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- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
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Abstract
The invention provides a method for constructing a DICOM server cluster, which adopts a plurality of servers to share storage resources, provides computing resources together and finishes searching and data reading together. With massively data, faster services are provided at lower equipment cost. A plurality of servers are constructed on the distributed file system and the distributed database technology, and the functions of data fragmentation, replication, synchronization, load balance and the like are realized among the servers. A complete DICOM service layer is provided in each server, and DICOM/HL7/HTTP interfaces conforming to the IHE specification are provided.
Description
Technical Field
The invention relates to the field of medical images, in particular to a method for constructing a DICOM server cluster.
Background
DICOM is a short for medical image and transmission, is a file format of medical image, and is also a transmission search protocol of the file in the format. DICOM, originated from PACS system (short for picture archiving and transmission system), was first applied in 1982 and is an important component of medical informatization and digitization.
DICOM, an information technology and protocol, is also constantly evolving. More and more imaging devices are used in daily medicine, and more data are stored in DICOM format, even including some non-image data such as structured reports. Especially in the context of big data applications, a hospital or medical research institution may have the following requirements for DICOM:
1. and (5) performing depth search. In addition to general indices such as patient ID, name, etc., DICOM also contains much useful information and data such as radiation dose of X-rays. The search and statistics of such information can become a fundamental need in the big data era.
2. Massive online data. Busy hospitals generate a large amount of DICOM data each day. Storage and searching of data over the past decades may be of exceptional significance to hospital studies or to individual patients.
The traditional PACS is designed only for informatization of hospital workflow and cannot be well adapted to the data management requirements of the new era. The modern cloud technology breaks through the bottleneck of a single server by adopting a distributed cluster mode, and simultaneously provides good flexibility of calculation and storage, thereby providing good reference for the traditional PACS system.
Disclosure of Invention
The invention aims to provide a method for constructing a DICOM server cluster, as shown in FIG. 3, a plurality of servers are adopted to share storage resources, computing resources are provided together, and searching and data reading are completed together, comprising the following steps:
preparing a host device;
building a distributed file system;
building a distributed database;
and (5) building a DICOM service layer.
In some embodiments of the present invention, the DICOM services layer further comprises DICOM/HL7/HTTP compliant IHE.
In some embodiments of the present invention, the host device at least needs to include a system disk, a database disk, and a plurality of data disks; the network is required to be configured for each host device, so that the host devices can communicate with each other in the local area network, and the distributed file system and the distributed data on each host device are transmitted in a TCP/IP protocol mode.
In some embodiments of the present invention, the host devices are configured in multiple numbers, and the configured hosts need to be identical host devices and live virtual host devices.
In some embodiments of the present invention, the,
the building of the distributed file system comprises the following steps:
installing a distributed file system, and adding a data disk of each host to the file system;
mount the file system to a directory of each host.
In some embodiments of the present invention, the,
the building of the distributed database comprises the following steps:
installing a distributed database, and distributing database disks on all hosts to the database;
exposing the database interface to each host.
In some embodiments of the present invention, the constructing of the DICOM service layer includes:
carrying out DICOM data modeling according to the database;
compiling and implementing a DICOM transmission protocol;
and butting the mounted file system and the mounted database.
In some embodiments of the invention, the servers are built on top of a distributed file system and distributed database, and a complete DICOM service layer is deployed within each server.
In some embodiments of the present invention, the hosts in the server cluster respectively interface the device side and the workstation, and the functions of data fragmentation, replication, synchronization and load balancing are implemented between the servers.
In some embodiments of the invention, the method comprises the following working processes:
the data source such as CT, MR, produce DICOM data first, and send to the server through DICOM transport protocol;
the server analyzes the received data, indexes the data to a distributed database to be inquired, and stores the data to a distributed file system;
after receiving the index, the distributed database carries out fragmentation and replication and sends the fragmentation and replication to other hosts in the cluster;
after receiving the data, the distributed file system carries out fragmentation and copying and sends the data to other host computers in the cluster, namely a storage process;
the server receives the query request, analyzes the request and accesses the distributed database to query;
the distributed database summarizes and summarizes the returned results of all the hosts which are inquired and sent by the distributed database and returns the summarized results to the data analysis module;
the data analysis module returns the result to the query process;
the server receives the reading request, analyzes the request, and accesses the distributed database to inquire the position of data storage, and the process is similar to the inquiry process and also needs to be distributed and summarized;
accessing the distributed file system according to the storage location;
the distributed file system will respond to the read process by reading data on other hosts as necessary.
The embodiment of the invention at least has the following advantages or beneficial effects:
1. unlike the common DICOM distributed storage, the scheme also adopts a distributed database. In DICOM applications, databases are typically used to respond to query requests. In a big data environment, a single point database has difficulty in responding effectively on time.
2. In the scheme, the database can be fragmented and stored on each node machine. The search requirements of any machine are dispersed to each node and then summarized and returned. A plurality of machines provide computing power simultaneously and can be used as an infrastructure for deep search.
3. The partitioned data and the database have redundant backup, and the use cannot be influenced by the single-node failure.
4. Data rebalancing may be to balance distributed data shards after adding nodes. Redundant backups may be used to replace old equipment.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of a DICOM server cluster structure constructed according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an operating structure of a server cluster according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of the operating principle of the host according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, "a plurality" represents at least 2.
In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example 1
A method for constructing DICOM server cluster, which uses multiple servers to share storage resources, provide computing resources together, and complete search and data reading together, as shown in FIG. 3, two hosts of a cluster are used for example, all devices are connected to host 1, and all workstations are connected to host 2. Data is copied between hosts, one is off-line and the other is still usable. Two hosts provide computing power simultaneously.
The specific setting method comprises the following steps:
preparing a host device;
building a distributed file system;
building a distributed database;
and (5) building a DICOM service layer.
In some embodiments of the present invention, the DICOM services layer further comprises DICOM/HL7/HTTP compliant IHE.
In some embodiments of the present invention, the host device at least needs to include a system disk, a database disk, and a plurality of data disks; the network is required to be configured for each host device, so that the host devices can communicate with each other in the local area network, and the distributed file system and the distributed data on each host device are transmitted in a TCP/IP protocol mode.
In some embodiments of the present invention, the host devices are configured in multiple numbers, and the configured hosts need to be identical host devices and live virtual host devices.
In some embodiments of the present invention, the,
the building of the distributed file system comprises the following steps:
installing a distributed file system, and adding a data disk of each host to the file system;
mount the file system to a directory of each host.
In some embodiments of the present invention, the,
the building of the distributed database comprises the following steps:
installing a distributed database, and distributing database disks on all hosts to the database;
exposing the database interface to each host.
In some embodiments of the present invention, the constructing of the DICOM service layer includes:
carrying out DICOM data modeling according to the database;
compiling and implementing a DICOM transmission protocol;
and butting the mounted file system and the mounted database.
In some embodiments of the invention, the servers are built on top of a distributed file system and distributed database, and a complete DICOM service layer is deployed within each server.
In some embodiments of the present invention, the hosts in the server cluster respectively interface the device side and the workstation, and the functions of data fragmentation, replication, synchronization and load balancing are implemented between the servers, as shown in fig. 2.
In some embodiments, the general DICOM server works as follows:
a. data sources such as CT, MR will first generate DICOM data and send it to the server via DICOM transfer protocol.
b. The server analyzes the received data, stores the index into a database to be inquired, and stores the data into a hard disk-storage process.
c. The server receives the query request, analyzes the request, accesses the database for query and returns a result-query process.
d. And after receiving the reading request and analyzing the request, the server accesses the database to inquire the position of data storage and reads the returned data-reading process.
The embodiment of the scheme adopts the following working process, as shown in fig. 1:
the data source such as CT, MR, produce DICOM data first, and send to the server through DICOM transport protocol;
the server analyzes the received data, indexes the data to a distributed database to be inquired, and stores the data to a distributed file system;
after receiving the index, the distributed database carries out fragmentation and replication and sends the fragmentation and replication to other hosts in the cluster;
after receiving the data, the distributed file system carries out fragmentation and copying and sends the data to other host computers in the cluster, namely a storage process;
the server receives the query request, analyzes the request and accesses the distributed database to query;
the distributed database summarizes and summarizes the returned results of all the hosts which are inquired and sent by the distributed database and returns the summarized results to the data analysis module;
the data analysis module returns the result to the query process;
the server receives the reading request, analyzes the request, and accesses the distributed database to inquire the position of data storage, and the process is similar to the inquiry process and also needs to be distributed and summarized;
accessing the distributed file system according to the storage location;
the distributed file system will respond to the read process by reading data on other hosts as necessary.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for constructing a DICOM server cluster adopts a plurality of servers to share storage resources, provides computing resources together and finishes searching and data reading together, and is characterized by comprising the following steps:
preparing a host device;
building a distributed file system;
building a distributed database;
and (5) building a DICOM service layer.
2. The method of claim 1, wherein the DICOM services layer further comprises DICOM/HL7/HTTP compliant IHE protocol.
3. The method of claim 1, wherein the host device at least comprises a system disk, a database disk, and a plurality of data disks; the network is required to be configured for each host device, so that the host devices can communicate with each other in the local area network, and the distributed file system and the distributed data on each host device are transmitted in a TCP/IP protocol mode.
4. The method of claim 3, wherein the host devices are configured as multiple hosts, and the configured hosts are all the same host devices, namely virtual host devices.
5. The method of constructing a DICOM server cluster as claimed in claim 1, wherein the building of the distributed file system comprises:
installing a distributed file system, and adding a data disk of each host to the file system;
mount the file system to a directory of each host.
6. The method of constructing a DICOM server cluster as claimed in claim 1, wherein the building of the distributed database comprises:
installing a distributed database, and distributing database disks on all hosts to the database;
exposing the database interface to each host.
7. The method for constructing the DICOM server cluster according to claim 1, wherein the constructing of the DICOM service layer comprises:
carrying out DICOM data modeling according to the database;
compiling and implementing a DICOM transmission protocol;
and butting the mounted file system and the mounted database.
8. The method of claim 1, wherein the servers are built on top of a distributed file system and distributed database, and a complete DICOM service layer is configured in each server.
9. The method of claim 1, wherein the host computers in the server cluster are respectively connected to the device side and the workstation, and the functions of data fragmentation, replication, synchronization and load balancing are implemented between the servers.
10. The method for constructing DICOM server cluster as claimed in claim 1, wherein the method comprises the following working procedures:
the data source firstly generates DICOM data and sends the DICOM data to the server through a DICOM transmission protocol;
the server analyzes the received data, indexes the data to a distributed database to be inquired, and stores the data to a distributed file system;
after receiving the index, the distributed database carries out fragmentation and replication and sends the fragmentation and replication to other hosts in the cluster;
after receiving the data, the distributed file system performs fragmentation and replication and sends the data to other hosts in the cluster, which is a storage process;
the server receives the query request, analyzes the request and accesses the distributed database to query;
the distributed database summarizes and summarizes the returned results of all the hosts which are inquired and sent by the distributed database and returns the summarized results to the data analysis module;
the data analysis module returns the result, which is the query process;
the server receives the reading request, analyzes the request, and accesses the distributed database to inquire the position of data storage, and the process is similar to the inquiry process and also needs to be distributed and summarized;
accessing the distributed file system according to the storage location;
the distributed file system will respond to the read process by reading data on other hosts as necessary.
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