A Web interface to cloud-based Monte Carlo simulations

for TrueBeam and C-linac

Jong In ParkM.S. student

http://radiotherapyresearchtools.com

Contents

What is the Virtual Linac

Application of Virtual Linac

How can we use (register) ?

Background

• Field-independent components were not open to the public - Target, ion chamber, carousel

Varian provides ‘just’ phase space file for TrueBeam simulation

Purpose of Virtual LinacVarian has developed a cloud based web application, called “Virtual Linac”

Linac Monte Carlo simulation as service - Enable the research community

- Validated geometry (by Varian)

- Fast computing is available w/o server

http://radiotherapyresearchtools.com

2013. 05. 06 version 84 (open to the public)

~ 2013. 11. 18 version 94

Now updating ..

Simulation Mechanics

Input file

Dose distribution

User

http://radiotherapyresearchtools.com

Run MC simulation

Amazon Web Service

Elastic compute cloud 2

Use Case 1 – General case

Dose distribution

http://radiotherapyresearchtools.com

DOSXYZnrc

Virtual Linac

Check a plan

http://radiotherapyresearchtools.com

Virtual Linac Graphic User Interface

Validation of Simulation ResultsPresented in ‘AAPM’ meeting

- Simulation results were well matched with measurement

http://radiotherapyresearchtools.com

Use Case 2 – What can we change ?

Investigate changes to the treatment head- Low energy, medium energy, high energy, imaging,- Custom is also available

http://radiotherapyresearchtools.com

Treatment head

Use Case 2 – What can we change ?Originally, in TrueBeam simulation

Can define “Target”

Virtual Linac

Using carbon target

Use Case 2 – Treatment head

http://radiotherapyresearchtools.com

Flattening filter

- Open port (FFF), 4X, 6X, 8X, 10X, 15X, 18X, 20X

Location of writing phase space file

- above the jaw - below the mylar - isocenter - 95 cm from source - 150 cm from source

Use Case 3 – TrueBeam Developer mode

• What exactly is Developer Mode?

- A method to control all motion axes and imaging through

customized XML scripts

Image by Varian

• Dose distributions from TrueBeam Developer Mode XML file - non-Monte Carlo expert

http://radiotherapyresearchtools.com

Use Case 3 – TrueBeam Developer mode

TrueBeam Developer mode ‘xml’

Still to come !

How can we use (register) ? Requirements

① Send an email to – Daren Sawkey (Varian Medical Systems) - expression of register

How can we use (register) ? Requirements

② IP address as seen by the outside world (google “what’s my ip”)

How can we use (register) ? Requirements

③ Amazon Web services account number

• You can sign up for the Amazon Web Services (AWS) at aws.amazon.com.

• The AWS documentation is great, and available at aws.amazon.com/documentation/ec2 for EC2.

• After the sign up, click my account

How can we use (register) ? Requirements④ A completed license agreement

Varian the opportunity to review a draft copy of the proposed publication or presentation for review and approval at least 45 days prior to..

He or she has the power and authority

How can we use (register) ? Once the register, you can get started- Log in to AWS

How much is it? Payment ! When ?

Between Amazon web service and users

- Running the instance (Table)- Data transfer

“Linux” is cheaper than “window”

Can save cost reduced to 1/10 by using ‘spot request’ (highly recommend)

On-demand instance

Unit: $

Summary

• More detail information http://radiotherapyresearchtools.com

• Varian validated geometry of component - Full TrueBeam simulation is available

• Fast parallel computing

• TrueBeam developer mode will be soon

• Reasonable cost with ‘spot request’

Thank you for your attention !