| 摘要 |
An ultrsound diagnostic apparatus comprises an unit 7 for forming tomographic images on times series on the basis of a reflection echo signals received by ultrasound probe 2, an unit 8 for obtaining the elasticities of portions in the body tissue on the basis of the reflection echo signals and forming elasticity images on times series, an unit 9 for forming a superimposition image on time series by superposing the tomographic image on the elasticity image, an unit 43 for inputting an instruction for controlling the formation of the superimposition image, and an unit 10 for displaying the superimposition image. The ultrsound diagnostic apparatus further comprises a freezing control portion (7, 8) for outputting an image, as a frozen image, selected in response to a freezing instruction for freezing the display operation on time series of any of the tomographic image or the elasticity image input into the input unit to the superimposition image forming unit.
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