Computer simulation analysis of image and patient dosage in Rotational Panoramic Radiography

旋转全景摄影中图像和患者剂量的计算机模拟分析

基本信息

  • 批准号:
    05671578
  • 负责人:
  • 金额:
    $ 1.41万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
  • 财政年份:
    1993
  • 资助国家:
    日本
  • 起止时间:
    1993 至 1994
  • 项目状态:
    已结题

项目摘要

The image quality and the patient dosage in rotational panoramic radiography are affected by various mechanical factors. such as the vertical angle of x-ray beam, beam width, and beam movement pattern. In order to evaluate separately the effect of each factor on the image and the dosage, we introduced a computer simulation method.At first, the head phantom for simulation, which represented tissues and organs by numerical values, was constructed. Objective tissues and organs were air, soft tissue, spongy bone, cortical bone, tooth tissue, salivary grand, thyroid grand and eye lens. Next, the simulation program for reproducing the actual image formation process in the computer was developed. With this program, the image and the dosage distribution could be simultaneously simulated under several mechanical factors.The present simulation program has the problems as follows. 1. The structure of the head phantom is not sufficiently faithful to that of the human. 2. X-ray attenuation coefficients of each element in the head phantom should be decided more accurately. 3. The scatter radiation is not considered at all.These problems will be resolved in near future.
旋转全景摄影的图像质量和患者剂量受各种机械因素的影响。例如X射线束的垂直角度、束宽度和束移动模式。为了分别评价各因素对图像和剂量的影响,我们引入了计算机模拟的方法,首先构造了用数值表示组织器官的模拟用头部体模。目的组织器官为空气、软组织、松质骨、皮质骨、牙组织、唾液腺、甲状腺及眼透镜。接下来,开发用于在计算机中再现实际图像形成过程的模拟程序。该程序可以同时模拟多种力学因素作用下的图像和剂量分布。1.头部体模的结构不足以忠实于人的结构。2.应更准确地确定头部体模中各元素的X射线衰减系数。3.该方法完全不考虑散射辐射,这些问题将在不久的将来得到解决。

项目成果

期刊论文数量(0)
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KUROYANAGI Kinya其他文献

KUROYANAGI Kinya的其他文献

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{{ truncateString('KUROYANAGI Kinya', 18)}}的其他基金

THE MOST PRACTICAL INTRAORAL DIGITAL X-RAY IMAGING
最实用的口内数字 X 射线成像
  • 批准号:
    08457501
  • 财政年份:
    1996
  • 资助金额:
    $ 1.41万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)

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