Figures & data
Figure 1. Coronal CT images through the central part of the tumour, with dose distribution as overlay for the seven fields and seven step-and-shoot intensity levels dose plan. Top image: 2.5 mm MLC. Middle image: 5 mm MLC. Bottom image: 10 mm MLC. Contour colours, with prescribed dose in brackets: Compartment 1: green (48.1 Gy), Compartment 2: yellow (53.8 Gy), Compartment 3: blue (63.4 Gy), Compartment 4: red (70.3 Gy).
![Figure 1. Coronal CT images through the central part of the tumour, with dose distribution as overlay for the seven fields and seven step-and-shoot intensity levels dose plan. Top image: 2.5 mm MLC. Middle image: 5 mm MLC. Bottom image: 10 mm MLC. Contour colours, with prescribed dose in brackets: Compartment 1: green (48.1 Gy), Compartment 2: yellow (53.8 Gy), Compartment 3: blue (63.4 Gy), Compartment 4: red (70.3 Gy).](/cms/asset/00411782-6eab-4d07-8f6a-0270edf84fbe/ionc_a_498832_f0001_b.jpg)
Table I. Dosimetric and radiobiological parameters for three different MLC types1.
Figure 2. Differential DVHs from the seven fields and seven step-and-shoot intensity levels dose plan. Each panel represents one compartment, and shows data for the 2.5 mm MLC (solid lines), 5 mm MLC (dashed lines) and 10 mm MLC (dotted lines).
![Figure 2. Differential DVHs from the seven fields and seven step-and-shoot intensity levels dose plan. Each panel represents one compartment, and shows data for the 2.5 mm MLC (solid lines), 5 mm MLC (dashed lines) and 10 mm MLC (dotted lines).](/cms/asset/b60e1e69-877c-40a0-bb5c-5dcd19541d3e/ionc_a_498832_f0002_b.gif)
Figure 3. TCP values for the whole tumour for the three MLC types. Each panel shows one field setup with four different step-and-shoot intensity levels.
![Figure 3. TCP values for the whole tumour for the three MLC types. Each panel shows one field setup with four different step-and-shoot intensity levels.](/cms/asset/3b96a546-d384-4d45-8477-60e10d146823/ionc_a_498832_f0003_b.jpg)
Figure 4. TCP calculations resulting from shifting the tumour relative to the dose matrix in the coronal plane. Data shown are for the seven fields and seven step-and-shoot intensity levels dose plan, with redistributed and uniform dose distributions. The abscissa for the random displacement panel (top) represents one standard deviation.
![Figure 4. TCP calculations resulting from shifting the tumour relative to the dose matrix in the coronal plane. Data shown are for the seven fields and seven step-and-shoot intensity levels dose plan, with redistributed and uniform dose distributions. The abscissa for the random displacement panel (top) represents one standard deviation.](/cms/asset/29244321-8cd3-4b5c-8fab-4976d5826ce3/ionc_a_498832_f0004_b.jpg)