Phantom Patient for Stereotactic End-to-End Verification

Model 038

SRS commissioning and treatment verification

Stereotactic Radiosurgery (SRS) necessitates a high degree of accuracy in target localization and dose delivery. Small errors can result in significant under treatment of portions of the tumor volume and overdose of nearby normal tissues. The CIRS Stereotactic End-to-End Verification Phantom (STEEV) provides a means to check all necessary steps of a treatment planning system — from diagnostic imaging with CT, MR and PET, to treatment plan verification.

Accurate patient simulation

STEEV’s anthropomorphic exterior allows for use of multiple positioning and fixation devices as used in clinical application. Internal details such as cortical and trabecular bone, brain, spinal cord, teeth, sinuses and trachea provide the most realistic clinical simulation to evaluate the challenging effects of complex intra- and extra-cranial anatomies. Geometric and organic target inserts provide means for comprehensive image QA, geometric machine QA and TPS QA for increased confidence in system performance.

Multi-modality Imaging

STEEV accommodates five interchangeable multi-modality inserts. These inserts come with a variety of internal targets and must be filled with MRI or PET compatible liquids. Five external MRI/ CT fiducials enable additional alignment and distortion evaluation along three orthogonal axes.

Dose measurements at isocenter and off isocenter positions

STEEV accommodates a variety of interchangeable tissue equivalent inserts suitable for small field dosimetry including: micro- and pinpoint ion chambers, film, MOSFET, TLD, OSL (nanoDotTM*) and 3D gel. When used in conjunction with the various imaging inserts, STEEV provides the most comprehensive end-to-end testing and QA solution for SRS systems.

  • Perform end-to-end testing for commissioning as directed by AAPM TG-101
  • Verify patient positioning using frame/frameless systems, head and shoulder masks or other positioning fixation devices
  • Verify patient treatment plan in critical regions
  • Perform geometric machine QA; Winston-Lutz isocenter verification tests and localization/repositioning with couch shift
  • Perform IGRT QA procedure for X-ray and onboard kV and MV imagers including CBCT
  • Assess image fusion, image transfer QA, accuracy verification and TPS testing with Multi-modality imaging capabilities (CT, MRI and PET)
  • TPS Deformable Image registration algorithm accuracy QA

NOTE: This product or an optional accessory of this product requires a CIRS dosimetry cavity code before an order can be placed. Please refer to the Dosimetry Cavity Codes document to identify the CIRS code for the probe you intend to use with this product.

Data Sheet

Phantom Patient for Stereotactic End-to-End Verification: Data Sheet


Phantom Patient for Stereotactic End-to-End Verification: Brochure

Dosimetry Cavity Codes

Cavity Codes for Dosimetry Devices



Publication References

Dorenlot, Antoine. ‘Commissionning And First Results Of The New Leksell Gamma Knife: ICON’. 2015. Presentation. View

Dimitriadis A, Palmer AL, Thomas RAS, Nisbet A, Clark CH. Adaptation and validation of a commercial head phantom for cranial radiosurgery dosimetry end-to-end audit. Br J Radiol 2017; 90: 20170053. View

Model: 038 Modalities: , ,