Foreword
Scope
History
Purpose
Rationale
Validation
Evolution of the ACR-NEMA standard
Overview of this document
Compatibility of versions
1 Referenced standards and definitions
Referenced standards
Definitions
2 Technical overview of the standard
Introduction
Functional description
Hardware
Protocol elements
Interface location
Comparison with the ISO-OSI model
Corresponding layers
Physical layer
Data link layer
Transport/network layer
Session layer
Presentation and application layers
Summary of protocol and data structures
3 Performance specifications
Introduction
Error rates
Rate of data transfer
Environmental specifications
Minimum necessary functions for compatibility
4 Message format
Introduction
Message
Groups
Data set types
Data elements
Length
Value
ASCII values
Binary values
Multiple values
Data element types
Type 1 data elements
Type 1D (default) data elements
Type 2 data elements
Type 2D (default) data elements
Type 3 data elements
Data elements in optional groups
Shadow groups
Examples
5 Message content
Introduction and overview
Images
Hierarchical relationships of sets of images
Image identification
Original image identification
Modified image identification
Composite image identification
Image coordinate system
Patient orientation
Coordinate systems
Introduction
Axis definition
Origin definition
Image location and orientation
Localizer images
Other location information
Pixel bit fields
Image geometry
Image display
Display devices
Overlays and graphics
Definitions
Overlay representations
Regions of interest
Text
Other
Display devices
Message set ID
Text format ID
6 Command structure
Introduction
Status
Commands for normal processing
SEND commands
SEND command to display devices
FIND commands
GET commands
MOVE commands
MOVE command to a display device
DIALOG commands
Command for exception processing - cancel
CANCEL as applicable to commands in general
CANCEL as applicable to specific commands
Introduction
SEND
GET
FIND
MOVE
Command for verification-echo
7 Hardware and protocols
Introduction
Physical layer electrical specifications
Definitions
Signal definitions
Signal electrical characteristics
Driver and receiver characteristics
Cabling and termination
Physical connectors
Signal timing specifications
Physical layer and physical protocol
Introduction
Physical protocol state model
Interface arbitration for data transmission
8 Data exchange protocol
Introduction
Data link protocol
Frame descriptor word fields
Frame type field
Frame descriptor parameter field
Frame check sequence
Transport/network protocol
Introduction
Packet descriptor word
Channel number field
Default channel numbers
Packet type field
Service class field
Block sequence number
Establishing channels
Session layer protocol
Introduction
Connection control word
Destination/source fields
Channel 0
Additional services of session protocol
Primary imaging equipment
Dedicated imaging equipment
Network interface units
Flow control
Physical layer
Data link layer
Transport/network layer
Session layer and message level
Exception handling
Physical layer
Data link layer
Transport/network layer
Session layer and message level
9 Examples of sending and receiving messages
Introduction
Sending messages
Opening a channel and establishing a connection
Sending command packets
Sending data packets
Message response
Closing a channel and dissolving a connection
Receiving messages
Receiving an open channel request and connect
request
Receiving command packets
Message response
Sending from dedicated equipment using minimum
protocol
Using the DIALOG command
10 Description of data elements
Introduction
Appendices
A Maximum transfer rate measurement
B Example of a typical message
C Hierarchical grouping of images
D Explanation of patient orientation
E Explanation of packing options
F Lookup table example
G Command examples
H Examples of the DIALOG command
I Examples of using display device data elements for
control of a laser camera