Cullip T J, Symon J R, Rosenman J G, Chaney E L
Radiation Oncology Department CB 7512, University of North Carolina, Chapel Hill 27599-7512.
Int J Radiat Oncol Biol Phys. 1993 Sep 1;27(1):145-51. doi: 10.1016/0360-3016(93)90432-u.
Add radiographic context to the beam's-eye-view used in 3-dimensional treatment planning. Improve methods for interactive visualization of anatomy and dose distributions.
Most 3-dimensional treatment planning systems feature a beam's-eye view that includes only graphical representations of patient anatomy. With input devices such as a mouse or trackball, the user interactively shapes the treatment field using the graphical models to provide geometric information. Radiographic context provides additional geometric information important for determining field shape. We have implemented digitally reconstructed fluoroscopy in the beam's-eye view by increasing the efficiency for computing digitally reconstructed radiographs. In addition we have improved algorithms for real-time surface and volume rendering for anatomy and doses using an experimental graphics supercomputer.
Without radiographic context in the beam's-eye-view, field shapes were sometimes changed after simulation or portal images were obtained. Digitally reconstructed fluoroscopy has essentially eliminated these changes. Higher quality interactive three-dimensional displays improve the comprehension, confidence and efficiency of the user. Our improvements have already been implemented on one model of a new generation of commercial graphics workstations.
Addition of radiographic context to the beam's-eye-view is recommended. Incorporation of higher quality interactive graphics is rapidly becoming practical and is encouraged.
为三维治疗计划中使用的射野视角添加影像学背景。改进解剖结构和剂量分布交互式可视化的方法。
大多数三维治疗计划系统的射野视角仅包含患者解剖结构的图形表示。通过鼠标或轨迹球等输入设备，用户使用图形模型交互式地调整治疗野形状以提供几何信息。影像学背景提供了对于确定野形状很重要的额外几何信息。我们通过提高计算数字重建射线照片的效率，在射野视角中实现了数字重建荧光透视。此外，我们使用一台实验性图形超级计算机改进了用于解剖结构和剂量的实时表面和容积渲染算法。
在射野视角中没有影像学背景时，在获取模拟图像或射野图像后，野形状有时会发生改变。数字重建荧光透视基本上消除了这些改变。更高质量的交互式三维显示提高了用户的理解能力、信心和效率。我们的改进已经在新一代商用图形工作站的一个型号上得以实现。
建议在射野视角中添加影像学背景。纳入更高质量的交互式图形正迅速变得可行，应予以鼓励。
