Improvement of terahertz imaging with a dynamic subtraction technique

Zhiping Jiang; X. G. Xu; X.-C. Zhang

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Improvement of terahertz imaging with a dynamic subtraction technique

机译：动态减法技术改善太赫兹成像

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By use of dynamic subtraction it is feasible to adopt phase-sensitive detection with a CCD camera to reduce long-term optical background drift. We report on a two-order improvement of the signal-to-noise ratio. The improved system is used to image terahertz field distribution generated by an optically rectified electro-optic crystal with a modulation depth as small as 10~(-4). We also introduce a modified detection geometry that realizes near-field imaging capability with greatly improved spatial resolution.

机译：通过使用动态减法，采用CCD相机进行相敏检测以减少长期光学背景漂移是可行的。我们报告了信噪比的两级改善。改进的系统用于对由调制深度小至10〜（-4）的光学整流电晶体产生的太赫兹场分布进行成像。我们还介绍了一种改进的检测几何形状，该几何形状可实现近场成像功能并大大提高了空间分辨率。

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《Applied optics》 |2000年第17期|共6页
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Zhiping Jiang; X. G. Xu; X.-C. Zhang;
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中图分类光学;
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1. Improvement of terahertz imaging with a dynamic subtraction technique [J] . Zhiping Jiang, X. G. Xu, X.-C. Zhang Applied optics . 2000,第17期

机译：动态减法技术改善太赫兹成像
2. Effectiveness of temporal and dynamic subtraction images of the liver for detection of small HCC on abdominal CT images: Comparison of 3D nonlinear image-warping and 3D global-matching techniques [J] . Radiological physics and technology . 2011,第2期

机译：肝脏的时间和动态减影图像在腹部CT图像上检测小HCC的有效性：3D非线性图像变形和3D全局匹配技术的比较
3. Effectiveness of temporal and dynamic subtraction images of the liver for detection of small HCC on abdominal CT images: comparison of 3D nonlinear image-warping and 3D global-matching techniques [J] . Eiichiro Okumura, Shigeru Sanada, Masayuki Suzuki, Radiological Physics and Technology . 2011,第2期

机译：肝脏时间和动态减影图像在腹部CT图像上检测小肝癌的有效性：3D非线性图像变形和3D全局匹配技术的比较
4. Quantitative imaging of dynamic structure and function of the heart, lungs and circulation by computerized reconstruction and subtraction techniques [C] . Richard A. Robb, Erik L. Ritman, James F. Greenleaf, Annual conference on Computer graphics and interactive techniques;Conference on Computer graphics and interactive techniques . 1976

机译：通过计算机重建和减法技术对心脏，肺和循环的动态结构和功能进行定量成像
5. ABSORPTION EDGE DIFFERENCE IMAGING USING QUASI-MONOCHROMATIC X-RAYS AND FLUOROSCOPIC VIDEO SUBTRACTION TECHNIQUES. [D] . KELCZ, FREDERICK. 1975

机译：使用准单相X射线和荧光视频减影技术对吸收边缘差异成像。
6. Application of temporal subtraction for detection of interval changes on chest radiographs: Improvement of subtraction images using automated initial image matching [O] . Takayuki Ishida, Kazuto Ashizawa, Roger Engelmann, 1999

机译：暂时相减在胸部X光片上检测间隔变化的应用：使用自动初始图像匹配改进相减图像
7. Improvement in Visibility of Simulated Lung Nodules on Computed Radiography (CR) Chest Images by Use of Temporal Subtraction Technique [O] . NOBUHIRO ODA, SHIGEHIKO KATSURAGAWA, KUNIO DOI, 1999

机译：通过使用时间减法技术改善模拟肺结节对计算射线照相（CR）胸部图像的可见性
8. Near-Field Terahertz Transmission Imaging at 0.210 Terahertz Using a Simple Aperture Technique. [R] . Heimbeck, M. S., Everitt, H. O., Frees, A. E. 2015

机译：利用简单的孔径技术在0.210太赫兹的近场太赫兹透射成像。

Improvement of terahertz imaging with a dynamic subtraction technique

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