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Program Information

Cranial SRS and SRT On a Siemens Artist Using the Brainlab IPlan Treatment Planning System

O Gayou

O Gayou1*, (1) Allegheny General Hospital, Pittsburgh, PA

TH-C-218-2 Thursday 10:30:00 AM - 12:30:00 PM Room: 218

Linear accelerator-based stereotactic radiosurgery (SRS) or radiotherapy (SRT) is a well accepted technique for the treatment of cranial primary and metastatic lesions and acoustic neuromas. The requirements in terms of accuracy and reliability of the linac are more stringent for these modalities than they are for more highly fractionated treatments. However these requirements have been identified and standardized in the TG142 report on external beam quality assurance (QA). It is usually not difficult for a newly purchased modern linac to meet these requirements, giving users a wider variety of choice when considering starting an SRS/SRT program. The compatibility of these linacs with SRS/SRT-specific equipment and software, such as cones, frames or treatment planning systems, must be established. I will report on the use at our institution of a Siemens Artiste™ linac for cranial SRS/SRT, in conjunction with the Brainlab iPlan® treatment planning system. I will discuss the various combinations of using the Brainlab SRS cones or the Siemens 160-leaf multileaf collimator (160-MLC) for beam shaping; the Brainlab frame or frameless system for immobilization; the Brainlab target positioning system or the Siemens MVision™ MV-CBCT system for localization. I will describe the commissioning steps of the system, including data acquisition for beam modeling in iPlan® and end-to-end testing. Various issues that arose throughout the use of this Siemens/Brainlab hybrid system over the last 3 years will be discussed.

Learning objectives:
1) To assess the safety and usefulness of a multivendor solution for cranial SRS/SRT.
2) To understand the commissioning and quality assurance steps of a Siemens Artiste™ / Brainlab iPlan® hybrid system for cranial SRS/SRT
3) To understand the limitations of the hybrid system.

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