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| Total Body Irradiation Planning System Based on CT Images |
| LIN Xiao-lei, XU Hai-rong |
| School of Biological Engineering, Southern Medical University, Guangzhou 510515 China |
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Abstract Objective To design a new Total Body Irradiation planning system (TBI-Plansys) based on CT images.Methods A description of the material and method in the dosimetrical procedure is included as it constitutes the basis of the proposed dose calculation algorithm.Microsoft Visual C++ was used to analyze CT images for useful information and to calculate the dose of patients.The dose distribution displayed on CT images was processed by the dose distribution calculation methods.VTK technology was used in the 3D display in the system.Results TBI-Plansys use patient CT data to calculate the absolute and relative dose distributions along midline, the transversal axis at the specification point and on transverse sections.The system also calculates the appropriate thickness of bolus and shielding to modify undesired dose distributions.Conclusions CT calculations by TBI-Plansys allow us to detect undesired distributions which may go unnoticed by calculations at only some specific points.The system has shown clear advantages for routine clinical use as it generates more detailed and accurate information than manual calculations and diminishes the time requirements.
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Received: 26 November 2009
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