電腦輔助設計三度空間真實表面數學模式於放射治療定位影像之應用

The Application of CAD-3-D Modules for Image of Simulation in Radiation Therapy

吳錦榕(Ching-Jung Wu) ； 孫述平(Shuh-Ping Sun) ； 許文林(Wen-Lin Hsu) ； 阮昭銘(Jau-Ming Ruan)

《放射治療與腫瘤學》 7卷3期 (2000/09) Pp. 169-176

https://doi.org/10.6316/TRO/200007(3)169

摘要

目的：整合數位化影像攝影技術及電腦輔助設計(CAD)三度空間(3D)真實表面(Real-world surface)數學模式，進而發展一實用的醫用電腦人體3D真實表面影像的數位化及成形技術，並期望經由介面的整合與3D放射治療系統結合，以滿足放射治療過程中定位影像及劑量計算之需求。
材料與方法：本研究中利用數位攝影測量技術量測目標物，以重疊之數位影像構成立體像對，配合事先設計之攝影平台與精確量測之控制點座標，建構影像之立體模型。
結論：本次試驗量測之模具包括圓柱體、長方體、三角體、半圓形柱體等，量測之結果與實物量測之結果誤差介於3-8%。
結論：數位影像之晶質良好與否關係測量結果之精度甚鉅，因此擷取影像之設備應妥善規畫，相機鏡頭之解像力、焦距、攝影平台、相機架設、攝影距離、光線等均應詳細規劃，以獲得較佳之攝影結果。

關鍵字

電腦輔助設計,數位攝影測量技術,放射治療

並列摘要

Purpose: The objective of this research is to integrate digital image processing techniques, computer aided design (CAD), and 3-dimension mathematical model to develop a 3-D real-world surface model imaging system for medical applications.
Materials and Methods: In this study, digital photogrammetry technique was used to measure target objects. Digital image pairs with appropriate overlap were used to form stereo image pairs. With properly designed photographic platform and precisely measured control points, stereo models can be built from digital images and coordinates of target objects can be measured.
Results: The results indicate that digital photogrammetry can be used in acquiring information about target objects.
Conclusion: With properly designed photographic equipment and procedure, and appropriate software and hardware facilities, the technique can meet the requirements of various medical applications.

並列關鍵字

Computer Aided Design (CAD),Digital Photogrammetry,Radiation Therapy