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Active THz Medical Imaging Using Broadband Direct Detection

机译:使用宽带直接检测的有源THz医学成像

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摘要

Research in THz imaging is generally focused on three primary application areas: medical, security, and nondestructive evaluation (NDE). While work in THz security imaging and personnel screening is populated by a number of different active and passive system architectures, research in medical imaging in is generally performed with THz time-domain systems. These systems typically employ photoconductive or electro-optic source/detector pairs and can acquire depth resolved data or spectrally resolved pixels by synchronously sampling the electric field of the transmitted/reflected waveform. While time-domain is a very powerful scientific technique, results reported in the literature suggest that desired THz contrast in medical imaging may not require the volume of data accessible from time-resolved measurements and that a simpler direct detection, active technique may be sufficient for specific applications. In this talk we discuss an active direct detection reflectometer system architecture operating at a center frequency of~ 525 GHz that uses a photoconductive source and schottky diode detector. This design takes advantage or radar-like pulse rectification and novel reflective optical design to achieve high target imaging contrast with significant potential for high speed acquisition time. Results in spatially resolved hydration mapping of burn wounds are presented and future outlooks discussed.
机译:太赫兹成像的研究通常集中在三个主要应用领域:医疗,安全性和无损评估(NDE)。尽管太赫兹安全成像和人员筛选的工作由许多不同的主动和被动系统架构组成,但医学成像研究通常是在太赫兹时域系统中进行的。这些系统通常采用光电导或电光源/检测器对,并可以通过同步采样透射/反射波形的电场来获取深度解析数据或光谱解析像素。尽管时域是一项非常强大的科学技术,但文献报道的结果表明,医学成像中所需的THz对比度可能不需要时间分辨测量可访问的数据量,并且更简单的直接检测,主动技术可能足以满足具体应用。在本次演讲中,我们讨论了一种有源直接检测反射仪系统体系结构,该体系结构使用光导源和肖特基二极管检测器在约525 GHz的中心频率下工作。该设计利用了类似雷达的脉冲整流技术和新颖的反射光学设计,可以实现高目标成像对比度,并具有实现高速采集时间的巨大潜力。介绍了烧伤创面的空间分辨水化映射结果,并讨论了未来前景。

著录项

  • 来源
  • 会议地点 San Francisco CA(US)
  • 作者单位

    Dept. of Bioengineering, UCLA, 420 Westwood Plaza, Los Angeles, CA, USA 90095;

    Dept. of Bioengineering, UCLA, 420 Westwood Plaza, Los Angeles, CA, USA 90095;

    Dept. of Bioengineering, UCLA, 420 Westwood Plaza, Los Angeles, CA, USA 90095;

    Dept. of Electrical Engineering, UCLA, 420 Westwood Plaza, Los Angeles, CA, USA 90095;

    Dept. of Electrical Engineering, UCLA, 420 Westwood Plaza, Los Angeles, CA, USA 90095;

    Dept. of Bioengineering, UCLA, 420 Westwood Plaza, Los Angeles, CA, USA 90095;

    Dept. of Surgery, UCLA, 200 UCLA Medical Plaza, Los Angeles, CA, USA 90095;

    Dept. of Surgery, Walter Reed Army Medical Center, Washington, DC 20307 USA,Combat Wound Initiative Program, Washington, DC 20307 USA;

    Wright State University, 3640 Colonel Glenn Hwy, Dayton, OH 45435;

    Delft University of Technology, Mekelweg 4, 2628 CD, Delft, The Netherlands;

    Dept. of Bioengineering, UCLA, 420 Westwood Plaza, Los Angeles, CA, USA 90095,Dept. of Surgery, UCLA, 200 UCLA Medical Plaza, Los Angeles, CA, USA 90095,Dept. of Electrical Engineering, UCLA, 420 Westwood Plaza, Los Angeles, CA, USA 90095;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    THz medical imaging; THz; Burn; Hydration;

    机译:太赫兹医学成像;太赫兹烧伤;补水;

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