A computed tomographic imaging system for experimentation

Yanping Lu; Jue Wang; Fenglin Liu; Honglin Yu

doi:10.1117/12.791209

19 February 2008 A computed tomographic imaging system for experimentation

Yanping Lu, Jue Wang, Fenglin Liu, Honglin Yu

Proceedings Volume 6625, International Symposium on Photoelectronic Detection and Imaging 2007: Related Technologies and Applications; 66251D (2008) https://doi.org/10.1117/12.791209
Event: International Symposium on Photoelectronic Detection and Imaging: Technology and Applications 2007, 2007, Beijing, China

Abstract

Computed tomography (CT) is a non-invasive imaging technique, which is widely applied in medicine for diagnosis and surgical planning, and in industry for non-destructive testing (NDT) and non-destructive evaluation (NDE). So, it is significant for college students to understand the fundamental of CT. In this work, A CT imaging system named CD-50BG with 50mm field-of-view has been developed for experimental teaching at colleges. With the translate-rotate scanning mode, the system makes use of a 7.4×10⁸Bq (20mCi) activity ¹³⁷Cs radioactive source which is held in a tungsten alloy to shield the radiation and guarantee no harm to human body, and a single plastic scintillator + photomultitude detector which is convenient for counting because of its short-time brightness and good single pulse. At same time, an image processing software with the functions of reconstruction, image processing and 3D visualization has also been developed to process the 16 bits acquired data. The reconstruction time for a 128×128 image is less than 0.1 second. High quality images with 0.8mm spatial resolution and 2% contrast sensitivity can be obtained. So far in China, more than ten institutions of higher education, including Tsinghua University and Peking University, have already applied the system for elementary teaching.

Citation Download Citation

Yanping Lu, Jue Wang, Fenglin Liu, and Honglin Yu "A computed tomographic imaging system for experimentation", Proc. SPIE 6625, International Symposium on Photoelectronic Detection and Imaging 2007: Related Technologies and Applications, 66251D (19 February 2008); https://doi.org/10.1117/12.791209

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KEYWORDS

Sensors

Computed tomography

Nondestructive evaluation

Imaging systems

3D image reconstruction

3D image processing

Image processing

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