DICOM Second Generation Radiotherapy Supplement 160 Patient Setup - - PowerPoint PPT Presentation

DICOM Second Generation Radiotherapy Supplement 160 Patient Setup and Delivery

DICOM Working Group 07 Radiotherapy

Supplement 160

This Supplement deals with

• the instruction which RT Radiations are delivered

and

• the definition of the patient setup for treatment delivery.

2

Delivery Workflow

• A Treatment Planning System (TPS) generates a "treatment plan"

by creating one or more RT Radiation Sets, referencing one or more RT Radiations (see Supplement 175).

• These instances are sent to the Treatment Management System

(TMS).

• The TMS instructs the treatment device to deliver all or a subset of

these instances

• The instruction is realized using a UPS containing a RT Radiation

Set Delivery Instruction as input information

3

Delivery Instruction

The RT Radiation Set Delivery Instruction contains details about

• the current fraction number
• which RT Radiations are to be verified or delivered
• where to continue a delivery that was interrupted in a prior treatment

session

• in which order the RT Radiations are delivered
• which RT Radiations are omitted during this session.

4

Patient Setup

• Before treatment, the patient has to be set up depending on the

treatment location and the indication for treatment in order to guarantee safe and reproducible delivery results.

• The setup parameters are defined during the treatment planning

process.

• Treatment therapists will utilize the patient setup parameters as an

instruction for their setup procedure.

5

Patient Setup Parameters

The RT Patient Treatment Setup IOD contains the following information:

• The orientation of the patient with respect to the treatment device

and gravity

• The kind of setup device (e.g. treatment table or chair)
• The setup method (e.g. at isocenter or by a defined distance)
• The kind of shielding devices to be used
• The method how the patient is aligned (e.g. infrared markers
• r surface scanners)
• Whether certain procedures are to be considered during setup (e.g.

patient is sedated or vital signs have to be monitored)

6