Ch 18

Imaging Systems in Radiology

Workflow of images in radiology

CT, MR, US

Printing of Image on film

Radiologist

Radiologist

Digital mages

Printing of Image on film

Referring

Physician

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 ClassSpecification

specifies related

applied to an

defined as

Service Group Information ObjectDefinition

is a group of contains

DIMSE Services

 Attributes

SOP Class(es)

  

Picture-archiving and communications system (PACS) PACS is a integrated computer system

that acquires, stores, retrieves, and displays digital images.

 CT UltrasoundMRI Laser Scanner

Image Database

Workstation Workstation

PACS

Picture Archiving and Communication System

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

Display medical images on a web browserLoad DICOM files from the InternetPerform various Image manipulationsBuild a user-friendly interface

Ability to view images from internet

patientQuery showImage moveSeries

moveStudy studyQuerypatientStudies

HTTP

DICOM CLIENT

DICOM SERVER

IMAGE ARCHIVE

DICOM

Output Files

DICOM