Title :
Image reconstruction of ´Wave CT´
Author :
Miyashita, Toyokatsu
Author_Institution :
Res. Inst. of Electron., Shizuoka Univ., Hamamatsu, Japan
Abstract :
The author has proposed a superresolved wave CT (computed tomography) which includes wave properties, i.e., diffraction, refraction, reflection, and attenuation. The wave CT solves the Helmholtz equation, which has a complex wavenumber of both refractive index and attenuation coefficient, with a combination of finite and boundary element methods, and superresolved images are reconstructed (the wavelength and the object size are almost the same). In the case of human-body tomography, a radio wave of 50 MHz to 100 MHz in frequency is appropriate. The reconstruction error was 0.2% typically and 4% in the worst case.<>
Keywords :
computerised tomography; image reconstruction; 50 to 100 MHz; Helmholtz equation; attenuation coefficient; boundary element method; complex wavenumber; finite element method; human-body tomography; medical diagnostic imaging; reconstruction error; refractive index; superresolved wave CT; Attenuation; Boundary element methods; Computed tomography; Diffraction; Equations; Frequency; Image reconstruction; Image resolution; Reflection; Refractive index;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE
Conference_Location :
Santa Fe, NM, USA
Print_ISBN :
0-7803-0513-2
DOI :
10.1109/NSSMIC.1991.259287
