| US 7,513,872 B2 | ||
| Ultrasonic doppler measuring apparatus and control method therefor | ||
| Tatsuro Baba, Otawara (Japan); Masami Takahashi, Nasushiobara (Japan); Masao Takimoto, Otawara (Japan); Muneki Kataguchi, Nasushiobara (Japan); Takuya Sasaki, Nasu-gun (Japan); Yasuo Miyajima, Utsunomiya (Japan); Takanobu Uchibori, Otawara (Japan); Tomio Nabatame, Nasu-gun (Japan); and Toshiyuki Koinuma, Shimotsuga-gun (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan); and Toshiba Medical Systems Corporation, Otawara-shi (Japan) | ||
| Filed on Oct. 17, 2005, as Appl. No. 11/250,440. | ||
| Claims priority of application No. 2004-303440 (JP), filed on Oct. 18, 2004. | ||
| Prior Publication US 2006/0084873 A1, Apr. 20, 2006 | ||
| Int. Cl. A61B 8/00 (2006.01) | ||
| U.S. Cl. 600—455 | 20 Claims |
| 11. An ultrasonic Doppler measuring apparatus control method comprising:
transmitting an ultrasonic wave by driving an ultrasonic transducer which performs ultrasonic wave transmission/reception
in a predetermined direction of an object to be examined;
receiving a reception signal from the object which is obtained by transmission/reception of the ultrasonic wave;
detecting a Doppler signal from the reception signal;
time serially generating Doppler spectrum data by setting a predetermined window function for the Doppler signals at a predetermined
region which are time serially obtained by repeating ultrasonic wave transmission/reception in the predetermined direction;
measuring a Doppler sensitivity on the basis of said plurality of generated Doppler spectrum data;
generating a spectrum shape model on the basis of the window function;
setting a threshold range in which trace waveform data displaces by a predetermined amount in a frequency axis direction and
setting a plurality of thresholds in the threshold range on the basis of the spectrum shape model and the Doppler sensitivity;
generating a temporal change in Doppler frequency of the spectrum data which corresponds to a threshold selected from said
plurality of thresholds as the trace waveform data; and
displaying the trace waveform data.
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