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Synchrony® for the Radixact® System: From Concept to Clinic

Jeremy Heil, Senior Manager, Delivery Software, Accuray

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• Synchrony® Vision

• Technical Feasibility

• Design and Development

• Clinical

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Overview

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The Vision and the OpportunityIncrease patient comfort, reduce margins

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• Track position of the target

• Detect difference between actual target position and planned target position

• Correct treatment

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Motion Synchronization Technical FeasibilityConvincing ourselves

✓ Synchrony® on CyberKnife® experience

✓ Rotating adjustable angles vs dual fixed angle

o Math checks out

✓ Shift MLC leaves for IEC-X and IEC-Z changes

✓ Shift Jaws for IEC-Y changes

✓ Real-time leaf shifting

✓ Real-time jaw shifting

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Leaf Shifting : Good Planning Can’t CompensateImprovise. Adapt. Overcome. (in real-time)

Latency CorrectedBaseline

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Design and DevelopmentAdding the hardware to see patient and target

Synchrony®

Camera

LED markers

on patient

kV imaging

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• Optical camera and LEDs show

respiratory phase (blue line)

• kV images locate the target at

different phases of the breathing

cycle (red dots)

• Model is created that correlates

known position of target with

breathing phase

➢Model predicts the position of

target over breathing cycle

Motion Synchronization for the Radixact® System

• Building a Correlation Model

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“To complicate is simple, to

simplify is complicated. ...

Everybody is able to complicate.

Only a few can simplify.”

-Bruno Munari

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Synchrony® is Designed for Patients AND Clinicians

Scan Register Treat

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Did We Listen?We sure did

12COUNTRIES

France, Czech Republic, Poland, Italy,

Switzerland, Turkey, Germany, UK,

Netherlands, Belgium, US, and Canada

Physician, Medical Physicists, and

Radiation Technologists

42 CUSTOMERS

DIFFERENT CULTURES

DIFFERENT CLINICAL ROLES

CyberKnife®, TomoTherapy® Centers,

Regional Hospitals, Renowned

Academic and Research CentersCLINIC TYPES

CLINIC SETTINGS4

15SESSIONS

Clinical therapists, physicists, advisory

boards, clinical surrogates, including

treatment time studies

While you liked what you saw, you

had ideas on how to make it even

better

302 FEEDBACK

ITEMS

HANDS ON EVALUATIONS

YOU HAD A LOT TO SAY

Product changes based on

customer feedback - you helped

make Synchrony® better

54CHANGES

WE LISTENED

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Preparing for the ClinicPutting Synchrony® to the test

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Developed Measures of Tracking Performance

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Anthropomorphic Phantoms

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Seeing is Believing – From Vision to Product

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THANK YOU

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