在放射治疗期间,基于毫米波的患者设置验证和运动跟踪
Max Bressler1, Jingxuan Zhu1, Joshua Olick-Gibson2
1Department of Radiation Oncology, Washington University in St. Louis, St. Louis, Missouri, USA.
Medical physics
|March 8, 2024
概括
低成本的毫米波雷达为放射治疗患者监测提供了非电离解决方案. 这项研究验证了其用于精确的位置验证和运动跟踪的使用,即使通过障碍物实现毫米精度.
科学领域:
- 医学物理 医学物理
- 放射治疗技术 放射治疗技术
- 雷达系统工程 雷达系统工程
背景情况:
- 准确的患者定位和运动监测对于有效的放射治疗 (RT) 是至关重要的.
- 目前使用可见光或X射线的方法存在局限性,包括无法穿透障碍物或需要额外的辐射.
- 毫米波 (mmWave) 雷达提供了一个低成本的,非电离的替代方案,用于在RT期间持续监测患者.
研究的目的:
- 开发和验证用于位置验证的频率调制连续波 (FMCW) 毫米波雷达.
- 评估毫米波雷达在RT交付期间的运动跟踪能力.
主要方法:
- 使用77 GHz FMCW毫米波模块进行数据采集.
- 开发了一种基于Chirp Z Transform (CZT) 的算法,用于处理中频 (IF) 信号.
- 评估绝对距离和相对位移精度使用固态水板和人形幻影,有或没有障碍物.
主要成果:
- 带有CZT算法的毫米波雷达实现了1毫米绝对距离的精度到模拟的人体表面,没有障碍.
- 通过阻塞材料保持在3.5毫米 (最坏情况下5毫米) 的精度.
- 实现了亚毫米位移精度,超越了快速里叶变换 (FFT) 算法;表面到皮肤距离 (SSD) 精度以前在8毫米范围内.
结论:
- 通过CZT算法增强的毫米波雷达系统,准确地测量到平面的距离在1mm内.
- 对于不均,人形表面,在某些角度测量高达8毫米的表面,实现一致的精度仍然存在挑战.
- 需要进一步改进,以提高SSD测量准确度,使用毫米波雷达技术对非平面进行测量.
相关概念视频
Radiological Investigation I: X-ray and CT
Radiological investigations, including X-rays and computed tomography (CT) scans, are critical for diagnosing and evaluating various medical conditions. These imaging techniques provide valuable insights into the body's internal structures, aiding in the detection of abnormalities, assessment of disease progression, and development of treatment strategies. This article delves into two primary radiological investigations, chest X-rays and CT scans, outlining their purpose, procedures, and the...
Radiological Investigation II: MRI and Ventilation Perfusion Scan
Description
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...
Radiological Investigation III: Pulmonary Angiogram and PET Scan
Radiological investigations are paramount in the diagnosis and management of various pulmonary diseases. Two essential investigations are the Pulmonary Angiogram and the Positron Emission Tomography (PET) Scan.
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
Imaging Studies II: Positron Emission Tomography and Scintigraphy
Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
Fundamental Principles of PET
Imaging Studies for Cardiovascular System III: X-Ray
The most common cardiovascular diagnostic test is an X-ray. It produces images of the heart, blood vessels, and adjacent structures.
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
Definition and Purpose
An X-ray, or radiograph, is a non-invasive method that uses ionizing radiation to take images of internal structures. It is mainly used in cardiac imaging to examine the heart, lungs, and major blood vessels, aiming to identify abnormalities in the heart's size, shape, and position, such as heart failure, congenital defects, and vascular...
Holter Monitor: 24-Hour Monitoring
Holter monitoring is a continuous electrocardiography (ECG) recording that tracks the heart's electrical activity over an extended period, generally 24 to 48 hours. This noninvasive diagnostic tool detects irregular heart rhythms that may not be captured during a standard ECG performed in a clinical setting.DeviceThe Holter monitor is a portable, small device connected to several electrodes on the patient's chest. These electrodes detect the heart's electrical signals and transmit them to the...


