
Industrial CST Software
Better Surfaces For Metrology. Cleaner Volumes for Defect Detection.
Get Next-Level Image Clarity from your CT Scans.
Experience outstanding reconstruction quality with Varian’s CST toolkit, designed to eliminate artifacts and optimize imaging results. Enhance your systems quickly using built-in corrections, GPU acceleration, and precision calibration tools.
CST Specifications and Features
RECONSTRUCTION | |
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Algorithms | Statistical (Iterative)Reconstruction (SR) and Feldkamp Backprojection (FDK) |
GPU Support | Nvidia, multiple GPUs, offload to RAM if VRAM exceeded |
Tunability | Extensive possibilities on both SR and FDK |
Air norm | Flat Value, Adaptive, Image based |
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FDK (left) and SR (right) Reconstruction. SR is slower but preserves surface.
2D IMAGE PROCESSING | |
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Lag Correction (See Video below) | Dramatically reduce lag content in CT Projections. |
Beam Hardening | Many material presets, ability to add custom materials |
2D Detector Scatter | Varex Detector Scatter Models |
2D Object Scatter | Material and Spectrum Dependent Corrections |
2D AI Scatter | Machine Learning Corrections available for highly repetitive data (For example Inline CT) |
Resolution Enhancement | Remove Scintillator Blur with Varex Detector Pixel and Scintillator models. |
SYSTEM GEOMETRY CALIBRATION (GeoKit) | |
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Precision Phantoms | Different Sizes of Varex Phantoms available for Standard and Micro-Focus Systems |
Absolute Values | Geokit determines SID, SAD, Focal Length, Piercing Point, etc for full determination of your system’s geometry. |
9 Degrees of Freedom | Position and Orientation of Source, Detector and Rotation Axis. |
Dynamic Geometry, as well as Static | Full (Absolute value) 9-DOF data available per-frame, for systems with geometries that vary throughout the trajectory. |
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Dynamic Geometry results

Microfocus calibration phantom
VOLUME-BASED (3D) PROCESSING | |
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Material Segmentation | Separate out materials in your scan volume |
Metal Artefact Correction (MAR) | Detect Metal and reduce or eliminate negative image quality effects |
3D Scatter Correction ” 3D Vsharp” | Hardware free, highly effective, highly adaptive scatter elimination. |
3D Multi Material Beam Hardening | Reduce or eliminate beam hardening effects in multi material volumes. |
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MAR: surface preserved in plastic part with metalspring

Turbine blade airfoil without and with 3D Vsharp (450kV scan)