Xstrahl enables clinically relevant research, yielding clinically relevant results.

Accessories and Add-Ons

Pre-clinical research technology must keep pace with clinical advancements to continue to generate translational data. At Xstrahl, we continue to develop additional technologies which seamlessly integrate into the SARRP to mimic clinical radiation practice. Through active collaboration with academic institutions, in house experts, and SARRP user feedback. We strive to develop new and translational equipment which enables investigators to move the field of radiation science forward.

Contact us to understand more from our technical team how SARRP can be tailored specifically for your needs.


Motorised Variable Collimator

The Motorized Variable Collimator (MVC) is first of its kind in preclinical irradiation and unique to SARRP. The MVC is comprised of two symmetrical jaws with divergent edges. This design minimizes penumbra, resulting in minimal dose delivered outside of the radiation field. The dynamic jaws allow the user to dictate field size ranging from 1mm x 1mm, up to 40mm x 80mm. This ability enables the user to quickly adapt the system to perform large field irradiations (whole body), to small focal irradiation, such as brain metastases. The collimator is equipped with a light field which allows for increased workflow allowing the user to verify the irradiation field size, and location.

Complete autonomous control of the MVC is achieved through the fully integrated Muriplan treatment planning software.

Research Applications:

  • Subcutaneous Flank Tumors
  • CNS Irradiation (Spinal Cord and Brain)
  • Whole Thorax Irradiation
  • Abdominal Irradiation
  • Cell Irradiation
  • Whole Body Irradiation
  • Orthotopic Tumors
  • Hemi/Whole Brain Irradiation
  • Bone Marrow Ablation

Static Collimators

In addition to the standard set of collimators, Xstrahl can provide additional custom collimators to fit specific research needs. Often with larger animals (rats and rabbits), the standard stereotactic collimators provided with SARRP are not large enough. To accommodate for this, Xstrahl produces larger static collimators that provide 10cm of clearance from the isocenter. Shorter collimators are also available for rabbit studies.

Along with the standard set of collimators, custom collimators can be commissioned by Xstrahl and integrated into Muriplan.

Square Collimators Circular Collimators
2 cm x 2 cm 1.5 cm
4 cm x 4 cm 2 cm
8 cm x 8 cm 2.5 cm
10 cm x 10 cm 3 cm
4 cm


Xstrahl have developed a unique dose planning, verification, and treatment delivery system; Muriplan. This intuitive system has been designed to enable researchers to both plan and execute experiments. This fully integrated software will guide the scientist through a step by step process allowing them to carry out the treatment plan in an easy and seamless fashion.

Muriplan has been designed to mimic clinical practice by allowing the investigator to view the 3D reconstructed cone beam-CT image, register/fuse other images like MR and PET/CT, and contour the target as well as surrounding tissue. Furthermore, the capability to save a treatment plan and access it at a later time allows for increased workflow in fractionated treatment schedules. Along with evaluation and validation tools which include isodose lines and the ability to create a dose volume histogram (DVH), Muriplan allows for the control of all hardware components of SARRP included X-ray delivery, imaging, and robotics.



MuriGlo is an advanced in vivo optical imaging system with bioluminescence (BLI), bioluminescence tomography (BLT1) and transillumination fluorescence imaging (TFI2) capabilities. The system uses the photon emission data acquired from three rotating mirrors and a state-of-the-art 3D reconstruction engine that uses the anatomic and optical priors derived by diffuse optical tomography (DOT) and cone-beam CT (CBCT) data to yield a 3D center of mass (COM) of the target. The COM is then automatically fused with the SARRP CBCT allowing for more accurate treatment planning and targeting for lesions that are hard to identify by CBCT alone. Through recognition of highly sensitive data points throughout the specimen, MuriGlo provides accurate and reproducible optical quantitation. The versatility of the system provides the user an unprecedented range of imaging wavelengths (i.e. 450nm-800nm).

Muriglo is designed to be used on board the SARRP image guided irradiator for accurate targeting of tumors and metastasis. The unique docking design allows MuriGlo to be integrated within the SARRP or used in a standalone benchtop configuration. This dynamic configuration will extend the imaging capabilities of your lab, and increase workflow when using the SARRP in tandem.

1. NCI funded Academic-Industrial Partnership between John Hopkins University and Xstrahl. 2. Work in progress.


Animal Immobilisation Devices

As with clinical treatments, the need for innovative immobilization devices has expanded with the precision of the delivery systems. SARRP comes standard with a wide range of animal beds that enable researchers to achieve their experimental goals. Xstrahl are constantly adding to the range of animal immobilization systems to ensure accurate dose delivery to animals. Xstrahl develops custom immobilization devices to fit your specific research needs. Our in-house team of designers will work within your requirements to produce a device that is optimal for your research needs.

Available immobilization devices include:

  • Universal Horizontal Bed
  • Large Mouse/Rat Bed
  • Rabbit Bed
  • Vertical Immobilization Devices
  • Large Flat Shelf
  • Heated Beds
  • 2 or 3 Animal Beds

All immobilization devices can be equipped with a heating modality to maintain body temperature while under anesthesia



Xstrahl offers a state of the art, compact, air pressurized anesthesia and scavenging system from Univentor. The unique system is designed to reduce variables contributing to the oxygen effect seen in irradiated animals, which can significantly affect survival curves. The system requires only pressurized air from a pump, instead of from oxygen tanks. This reduces the overall cost, and removes potential occupational dangers associated with the use of oxygen tanks. Because of this, the user is able to keep the mouse under the same anesthesia for the imaging and irradiation procedure. Overall, this will save on the amount of anesthesia used, and also reduce the amount of time a mouse is exposed to anesthesia.

Research Applications:

  • High Volume Studies
  • Long Irradiation Studies
  • Drug Efficacy and Toxicity Studies
  • Precise Irradiation Studies

Commissioning Set

Dose Commissioning is performed by Xstrahl Using AAPM Task Guide-61, Xstrahl factory commission the ordered collimators and inputs the data into your SARRP Dose Calculator and Muriplan©. This data will include beam geometry, output and depth dose checks.

This set comes with a custom commissioning jig for your SARRP collimators and a platform for holding solid water to acquire a dose output. The commissioning jig is used to define the PDD for each collimator. This jig is used with Gafchromic® film to enable measurements of the surface and depth profiles. This removable jig can be attached to the primary beam collimator.



Developed in collaboration with the world renowned Gray Institute, the SARRP 4D Gating system has been adapted and optimized to our research platform to provide the most precise lung irradiation available in small animal models. SARRP continues to mimic the clinic by providing a first of its kind in preclinical research. The SARRP 4D Gating System Attachment was originally created to account for the dynamic movement of the lung nodules during radiotherapy. The attachment is comprised of an ion chamber, a filter selector, and a rapid response gating system. It is compatible with both the variable collimators and micro collimators.

Research Applications:

  • Lung tumor Irradiation, primary tumors and metastases
  • Orthotopic tumors near the thoracic cavity including:
    • Lung
    • Liver
    • Pancreas
    • Mammary Tumors
    • Metastasis


The MuriQA phantom is composed of four sections and five distinct parts. These various sections are used to assess uniformity and geometric accuracy, resolution, modulation transfer function (MTF) and reconstruction value quantitatively or linearity.

Overall the phantom is 75 mm with a 12 mm radius. A flat bottom is provided for stability when placed in bed.

For more information about accessories download our brochure.