Artifacts caused by transmitter/receiver malposition in ultrasound reflection mode computer tomography

摘要

The spectra and image artifacts caused by transmitters and receivers erring from their designed positions are studied in ultrasound reflection mode computer tomography under the ray assumption. Malposition changes the projection-slice spectrum relationship. A ghost modulates the reconstructed images, and the reso- lution ability of the imaging system declines. An approache must be found to reduce the influence of transducer malposition in a high precision system.