Affiliations: National Key Laboratory for Electronic Measurement
Technology, North University of China, Taiyuan, Shannxi, China | Medical Image Processing Group, State Key Laboratory
of Management and Control for Complex Systems, Institute of Automation, Chinese
Academy of Sciences, Beijing, China
Note: [] Corresponding author: Ping Chen, Medical Image Processing Group,
State Key Laboratory of Management and Control for Complex Systems, Institute
of Automation, Chinese Academy of Sciences, Beijing 100190, China. Tel.: +86
351 355 7413; Fax: +86 351 3557413; E-mail: pc0912@163.com
Abstract: For complicated structural components characterized by wide X-ray
attenuation ranges, the conventional fixed-energy imaging mode cannot obtain
all structural information using a single tube voltage. This limitation results
in information shortage, because the effective thickness of components along
the orientation of the X-ray penetration exceeds the limit of the dynamic range
of the X-ray imaging system. To solve this problem, multi-energy image sequence
fusion technology has been advanced. In this new method, the tube voltage is
adjusted several times by matching the voltage and the effective thickness to
obtain all the effective local information on an object. Then, the subset
sequences in the multi-energy image sequence are extracted based on the
recursive template, and that are fused to reconstruct the full projection
information based on linear weighting. An accompanying experiment demonstrates
that the new technology can extend the dynamic range of X-ray imaging and
provide a complete representation of the internal structure of complicated
structural components.
