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

The spectra and image artifacts caused by transmitters and receivers erring from their designed positions are studied in ultrasound reflection mode co mputer tomography under the ray assumption. Malposition changes the project ion-slice spectrum relationship. A ghost modulates the reconstructed images ,and the resolution ability of the imaging system declines. An approache mu st be found to reduce the influence of transducer malposition in a high pre cision system.