| 摘要 |
PROBLEM TO BE SOLVED: To use a ultrasonic scanner easily and improve efficiency of the same in selection of basic image parameter selection that influences sensitivity and penetrability of B-mode. SOLUTION: A method and a device which automate control of central frequency and length of a B-mode ultrasonic waveform based on an actual image data are exhibited. An average SNR and space correlation statistics for a kernel of selected image data are analyzed, and then existence of a high quality signal is tested. Results for all tests direct usable transmitting waveform which gives the superlative discrimination with providing strong signal sufficiently until the results reach to desired depth by arranging at least one test kernel at a relatively deep depth (namely, close to a bottom of a depth range for an image which is selected by a user). |
