Transcript dicom - MCST-CS

Ch 18
Imaging Systems in Radiology
 Workflow
of images in radiology
Printing of Image on film
Radiologist
Referring
Digital mages
CT, MR, US
Physician
Printing of Image on film
Radiologist
Problems encountered with this system



Difficult to install and maintain
Platform (and vendor) dependent
Close system
What is DICOM?




DICOM – Digital Imaging and Communication in
Medicine
A standard for exchanging digital information between
medical imaging equipment and other systems (EHR) in
insuring interoperability.
The standard is a set of protocols between two devices.
Standards were developed by the American College of
Radiologists (ACR)
DICOM Information Model
Service Class
Specification
specifies related
SOP Class(es)
defined
as
Service Group
is a group of
DIMSE Services
applied to an
Information Object
Definition
contains
Attributes
Picture-archiving and
communications system (PACS)

PACS is a integrated computer system
that acquires, stores, retrieves, and
displays digital images.
PACS
Picture Archiving and Communication System
CT
MRI
Ultrasound
Laser Scanner
Image Database
Workstation
Workstation
Review-station
Review-station
Image Acquisition


Acquires PACS that must obtain images in digital
form.
Maintains Database
Image display capabilities

Implements a Query/Retrieval service

Considering special display capabilities


3D, 4D data places greater demands to calculate and redisplay
oblique slices.
Configuration of storage areas
Image Storage

Image storage requirements-differ by facility, by image modalities (CT,
MRI)
xray 2048x2560 pixels per image
MRI 256x256 pixels per image
CT-512x512 pixels per image
Ability to view images from internet
Display medical images on a web browser
Load DICOM files from the Internet
Perform various Image manipulations
Build a user-friendly interface
HTTP
patientQuery patientStudies moveStudy
moveSeries
DICOM CLIENT
DICOM
DICOM SERVER
DICOM
IMAGE ARCHIVE
showImage studyQuery
Output Files