3-DIMENSIONAL IMAGE-RECONSTRUCTION OF DIFFRACTION TOMOGRAPHY FROM DATA COLLECTED WITH COMPOUND SCANNED PAIR OF TRANSDUCERS

We extend our 2-dimensional method of ultrasonic diffraction tomograph g to 3 dimensions. We first derive the theory and the procedure which correspond to 3-D data collection. Then we propose two image-reconstru ction methods: interpolation method and noninterpolation method. We al so calculate the obtainable resolution of these imaging methods. We nu merically simulate the diffraction of ultrasonic waves from the assume d object and calculate the data of diffracted waves. Using the data we finally reconstruct the 3-D images of the object to confirm the feasi bility of our theory.