MOVEMENT DETECTION SYSTEM FOR PET SCANNERS

宠物扫描仪的运动检测系统

• 批准号: 3491797
• 负责人: RONALD NUTT
• 金额: $ 5万
• 依托单位: CTI, INC.
• 依托单位国家: 美国
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-09-15 至 1988-03-14
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/3491797
• 关键词: biomedical equipment resource; image processing; positron emission tomography

During a PET scan, the movement of the subject of more than a mm will cause noticeable blurring of the image. Movement will also cause artifacts to be introduced into the image because the matrix for correcting for gamma-ray absorption is determined for a specific position. This proposal outlines the development of a movement detection system using a small array of ultrasonic transducers that train narrow beams of ultrasound on selected areas on the subject in the image volume. The movement of the subject from the initial position will be detected by measuring the change in transit time of the sound reflected back to the transducers. If motion exceeding the preset acceptable amount occurs, the system will automatically stop data acquisition and display the displacements for each transducer so that the operator can move the subject back into position before resuming data acquisition. This movement detection system will allow more efficient use of the expensive PET systems, insure better imaging, and help eliminate repeat injection of the subject with radioactive isotopes.

在正电子发射计算机断层扫描期间，受检者的运动超过一次 MM将导致图像明显模糊。运动将会 也会导致伪影被引入到图像中，因为 确定了用于校正伽马射线吸收的矩阵 一个特定的位置。该提案概述了一种 一种使用小阵列超声波的运动检测系统 将窄波束训练到选定对象上的换能器 图像体积中被摄体上的区域。人类的运动 从初始位置开始将通过测量 反射回的声音的传播时间的变化 换能器。如果运动超过预设的可接受的量 发生时，系统将自动停止数据采集并 显示每个传感器的位移，以便操作员 可以在恢复数据之前将主题移回适当位置 收购。该移动检测系统将允许更多 高效使用昂贵的PET系统，确保更好的成像， 并帮助消除重复给受试者注射放射性物质 同位素。