CIRS 603A是为评估立体定向放射外科规划中的MR图像失真而设计的。它也是验证图像融合和各种处理规划系统中使用的可变形图像配准算法的有用工具。组织等效，拟人化的设计提供了接近临床成像场景的条件。可以用x射线、计算机断层扫描和磁共振成像来成像。所有MRI序列，包括T1加权、T2加权、3D飞行时间、MPRAGE和CISS，成像良好。

头骨是由一种以塑料为基础的骨替代物制成的，而间质和周围的软组织是由一种产生水基聚合物的专有信号制成的。整个幻肢被包裹在一个透明的塑料外壳中，以保护凝胶不干燥。幻影提供了特殊设计的垫，允许固定任何立体定向框架或安装端到端测试。幻影也适用于无框SRS质量保证。

整个颅间部分的头骨体积是由一个正交的三维网格3毫米直径棒间距15毫米。五个延伸的轴杆相交于网格的参考原点。每个扩展轴的末端都安装了CT/MR标记，允许使用激光进行精确定位，并实现CT和MR图像集的共配准。

这个假体包括左右两个空腔，直径3毫米，长17毫米，用来模拟每个耳道，以评估临床环境中常见的潜在失真。

为了适应图像融合技术，CIRS可以提供增值服务，如幻影特定CMM、参考CT或MRI数据集、附加客户特定的注册设备和包含特殊点标记。

CIRS 603A was designed for assessment of MR image distortion in Stereotactic Radiosurgery Planning.  It is also a useful tool for verifying image fusion and deformable image registration algorithms used in various treatment planning systems.  The tissue equivalent, anthropomorphic design provides the closest conditions to a clinical imaging scenario.  The phantom can be imaged using X-ray, Computed Tomography and Magnetic Resonance.  It images well with all MRI sequences tested to date, including T1 weighted, T2 weighted, 3D Time of Flight, MPRAGE and CISS.

The skull is manufactured from a plastic-ba[x]sed bone substitute, and the interstitial and surrounding soft tissues are made from a proprietary signal generating water-ba[x]sed polymer. The entire phantom is encased in a clear plastic shell to protect gel from desiccation. The phantom is supplied with specially designed pads that allow fixation with any stereotactic fr[x]ame or mounting for end-to-end testing. The phantom is also suitable for fr[x]ameless SRS QA.

The entire inter-cranial portion of the skull volume is filled with an orthogonal 3D grid of 3mm diameter rods spaced 15 mm apart. Five extended axis-rods intersect at the reference origin of the grid. The end of each extended axis is fitted with CT/MR markers allowing for accurate positioning with lasers and co-registration of CT and MR image sets.

The phantom includes right and left air voids, 3 mm in diameter by 17 mm long to simulate each ear canal for evaluation of potential distortions commonly found in clinical settings.

To accommodate image fusion techniques, CIRS can offer value added services such as phantom specific CMM, reference CT or MRI data sets, attachment of customer specific registration devices and inclusion of special point markers.

美国CIRS 603A头部体模，CIRS 603A头部模体产品特点:

• Images well on T1, T2 and 3D TOF MRI acquisitions

• Images well on CT scans

• Protective pad for use with Stereotactic fr[x]ame

• Images can be imported into stereotactic localization program

• CT scans can be used to assess MRI accuracy