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Archival and Communication of DICOM Images on a Hospital Network. Sheikh Mahmood H.M School of Biomedical Engineering IIT - Bombay. Workflow related to Images. Printing of Image on film. Radiologist. Referring Physician. Digital mages. CT, MR, US. Printing of Image on film. Radiologist.

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archival and communication of dicom images on a hospital network

Archival and Communication of DICOM Images on a Hospital Network

Sheikh Mahmood H.M

School of Biomedical Engineering

IIT - Bombay

slide2
Workflow related to Images

Printing of Image on film

Radiologist

Referring

Physician

Digital mages

CT, MR, US

Printing of Image on film

Radiologist

slide3

Picture Archiving and Communication System

CT

MRI

Ultrasound

Laser Scanner

Image Database

Workstation

Workstation

Review-station

Review-station

slide4
Problems encountered
  • Difficult to install and maintain
  • Platform (and vendor) dependent
  • Close system
acr nema
ACR-NEMA
  • American College of Radiologists

National Electrical Manufacturers' Association

  • DICOM – Digital Imaging and Communication in Medicine
slide6

DICOM: Digital Imaging and Communication in Medicine

  • Specifies a non-proprietary data interchange protocol and image format for medical images and image related information.
  • The information is modeled with entity-relationship (E-R) model
dicom data
DICOM Data
  • Information Object Definition (IOD) - A data abstraction of a class of real-world objects
  • DICOM Message Service Element (DIMSE) - The set of DICOM Application Layer communication services.
  • DIMSE Service Group (DSG) - A subset of the full DIMSE services which is applicable to a specific IOD
  • Service Object Pair (SOP) = IOD + DSG
dicom information model
DICOM Information Model

Service Class

Specification

specifies related

SOP Class(es)

defined as

Service Group

applied to an

Information Object

Definition

is a group of

contains

DIMSE Services

Attributes

slide10

Attribute (data element) – The functional unit of DICOM

  • The Attribute includes :
  • A tag that identifies the element,
  • Value Representation that describes how the value field to follow is represented
  • The length field that gives the length of the value field that follows
  • The Value field that contains the value to be transmitted
dicom toolkit
DICOM Toolkit
  • Imagectn – Implements DICOM Image Archive

Application Entity (Title, host, port)

Storage

Query

Retrieval

imagectn
Imagectn
  • Accepts SOP classes of storage service class and

Query/Retrieve service class

  • Maintains Database
  • Never exits
storescu
Storescu
  • Implements SCU for storage service class
  • Connects storage SCP
findscu
Findscu
  • Implements SCU for Query/Retrieve service class
  • Supports querying, using C-FIND
movescu
Movescu
  • Implements SCU for Query/Retrieve service class (uses C-MOVE) and
  • SCP for storage service class
  • Configuration of storage areas
slide16

STA_STORE DATA LTA_STORE

BASE

IMAGECTN

STORESCP

SCP for FINDSCU

SCU for MOVESCU

MED1

MED2

ORTHO1

ORTHO2

EMER

GENCY

OT

slide17

Service

Class User:

C-FIND

C-MOVE

C-GET

Service Class Provider:

C-FIND, C-MOVE, C-GET

Service Class User:

C-FIND, C-MOVE, C-GET

Service Class Provider:

C-STORE

Service class User:

C-STORE

DICOM Client

Image Server

Service Class Provider:

C-FIND, C-MOVE, C-GET

Service Class Provider:

C-STORE

DICOM Archive

www interface to dicom archive
WWW Interface to DICOM Archive
  • Using Existing PCs
  • Familiarity and User Friendly
  • Platform Independence
slide23

Display medical images on a web browser

  • Load DICOM files from the Internet
  • Perform various Image manipulations
  • Build a user-friendly interface
slide24

HTTP

HTTP

Server

CGI

DCMTK

Client

DICOM

DICOM

Archive

DICOM

Server

slide29

HTTP

patientQuery

patientStudies

moveStudy

moveSeries

showImage

studyQuery

CGI

DICOM CLIENT

Output Files

DICOM

DICOM SERVER

DICOM

IMAGE ARCHIVE

slide30

Conclusion

  • DicomAccess
  • Radiology Teaching Files
  • Image Format Conversion