CN104679744A - Storage optimization method of PACS (Picture Archiving and Communication System) - Google Patents

Abstract

The invention discloses a storage optimization method of a PACS (Picture Archiving and Communication System). The storage optimization method comprises the following steps: (1) a registration workstation fills patient information into a database; (2) an examination doctor which operates medical equipment introduces the patient information into the medical equipment and carries out an examination; (3) a DICOM (Digital Imaging and Communications in Medicine) gateway obtains an image from the medical equipment; (4) the DICOM gateway retransmits and stores the image to a PAS (Personal Access System); (5) the DICOM gateway writes a storage catalogue of the PAS into a database record of the patient; (6) when a diagnosis workstation calls a patient image, the record of the patient in the database is firstly accessed, and the storage catalogue of a DICOM image in the PAS is obtained; and (7) the diagnosis workstation obtains the image on the PAS according to the storage catalogue in an FTP (File Transfer Protocol) way, and carries out radiograph reading or other types of processing. The storage optimization method has the great advantages on the aspects of communication syntaxes, transmission time, retransmission mechanisms and database mechanisms.

Description

A kind of PACS system storage optimization method

Technical field

The present invention relates to a kind of PACS system storage optimization method.

Background technology

In PACS, image has two features: (1) image data amount is large; (2) access frequency is high.Because relational database supports that the high-frequency access ability of mass image data is poor, directly in the relational databases such as such as Oracle or SQL Server, store DICOM image, the requirement that PACS stores mass data and summary responses cannot be met.

Summary of the invention

The object of the invention is to solve the problems of the technologies described above, a kind of PACS system storage optimization method is provided.

The invention provides a kind of PACS system storage optimization method for achieving the above object: patient information is inserted database by (1) registration work station;

(2) patient information is introduced in Medical Devices by the inspection doctor operating Medical Devices, then checks;

(3) DICOM gateway obtains image from Medical Devices;

(4) image forwards and is stored into PAS by DICOM gateway;

(5) image writes in the data-base recording of this patient at the storage directory of PAS by DICOM gateway;

(6), when diagnostic workstation calls patient image, first this patient record in accessing database, obtains the storage directory of DICOM image in PAS;

(7) diagnostic workstation to obtain the image on PAS in FTP mode according to storage directory, carries out diagosis or other process.

The different piece of PACS image data according to its content characteristic distributed storage to the different server of performance speciality.

After have employed technique scheme, the present invention has following useful effect: the present invention in transfer syntax, transmission time, forwarding mechanism, database mechanisms all tool have great advantage.

Embodiment

A image acquisition Mechanism Design

DICOM gateway is responsible for the DICOM image gathering Medical Devices generation.According to DICOM agreement, the both sides of connection carry out communication by application entity (Application Entity is called for short AE), and the name of AE is called AE Title.AE represents certain process, and it must have the network address unique in physical network, i.e. presentation layer address.Because DICOM adopts TCP/IP as underlying protocol, it is exactly IP address and tcp port number that AE is mapped to presentation layer address.When carrying out actual DICOM equipment connection, AETitle, IP and these three parameters of port numbers must be set, DICOM image could be received.After parameters, DICOM gateway monitors internet message, after receiving DICOM connection message, consult the contents such as transfer syntax, application context, expression context, once consult successfully, just connect with Medical Devices, carry out data transmission, realize DICOM communication process, thus collect DICOM image.

B image memory mechanism designs

DICOM gateway carries out image storage according to layered directory.

The name of catalogue at different levels is determined to patient, information that Medical Devices are relevant by the DICOM image of correspondence.These information comprise inspection number (ExamNo), device type (Modality), check data (StudyDate), patient ID (Patient ID), patient name phonetic (PatientName), checking sequence number (Series Number), transfer syntax (Transfer Syntax UID) etc.

The daily file operations such as bibliographic structure needs to be convenient to search, back up, derivation.In order to ensure the efficiency of file operation, bibliographic structure is designed to level Four: (1) image type; (2) acquisition time; (3) patient information; (4) image sequence number.The wherein property value of Modality in first order catalogue called after image; The property value of StudyDate in the catalogue called after image of the second level; The combination of Patient ID property value and PatientName property value in third level catalogue called after image, thus the uniqueness ensureing patient information; The property value of SeriesNumber in fourth stage catalogue called after image.

Such as an ID is 2000, the patient of WangCai by name, twice CT examination has been done on March 15th, 2010, obtain the CT image of two sequences of sequence number 0001 and sequence number 0002 respectively, so first time check image storage directory be CT 20100315 2000WangCai 0001, second time check image storage directory be CT 20100315 2000WangCai 0002.The advantage of this structure is the uniqueness both ensureing that file stores, again the searching and backing up of convenience file.Even if same patient is doing the repeatedly inspection of same category of device on the same day, still can ensure that the storage directory of each image checked is unique.

C image forwarding mechanism designs

DICOM gateway is responsible for forwarding DICOM image on PAS.First the image received is stored in this locality according to level Four bibliographic structure by gateway, and then is forwarded to PAS, and stores according to identical level Four bibliographic structure.

In addition, in large hospital, in order to alleviate network traffic data, also need to set up multiple section office PAS as the backup of central PAS in section office in different section office.The diagnostic workstation of section's chamber interior can directly be accessed the image in section office PAS and directly need not access central PAS, thus reduces core network visit capacity, improves network utilisation efficiency.Therefore DICOM gateway also must send image to multiple PAS simultaneously, and this mechanism is called as " predistribution " mechanism.

D visiting mechanism designs

DICOM gateway is responsible for relevant information in DICOM image to insert database.

First the inspection message reference database contained in DICOM image, then the device type obtained from DICOM image, check data, image sequence number three information solicitation in this inspection number corresponding data-base recording.After diagnostic work stands in accessing database, the storage directory of image on PAS that can be corresponding according to these information structures.

Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (2)

1. a PACS system storage optimization method, comprising:

(1) patient information is inserted database by registration work station;

(2) patient information is introduced in Medical Devices by the inspection doctor operating Medical Devices, then checks;

(3) DICOM gateway obtains image from Medical Devices;

(4) image forwards and is stored into PAS by DICOM gateway;

(5) image writes in the data-base recording of this patient at the storage directory of PAS by DICOM gateway;

(6), when diagnostic workstation calls patient image, first this patient record in accessing database, obtains the storage directory of DICOM image in PAS;

(7) diagnostic workstation to obtain the image on PAS in FTP mode according to storage directory, carries out diagosis or other process.

2. a kind of PACS system storage optimization method according to claim 1, is characterized in that: the different piece of PACS image data according to its content characteristic distributed storage to the different server of performance speciality.