ULTRASONIC DIAGNOSTIC DEVICE
In the present invention, a wave transmission/reception unit is provided in the distal end of a probe. The wave transmission/reception unit includes a 2D-array oscillator, an electronic circuit, and a relay substrate for electrically joining the 2D-array oscillator and the electronic circuit. The face of the wave transmission/reception unit on a subject side thereof is a wave transmission/reception face. A temperature detection unit is provided to the relay substrate. In the present invention, a surface temperature estimation unit estimates the temperature of the surface of the wave transmission/reception face on the basis of the detected temperature from the temperature detection unit and the power consumption by the wave transmission/reception unit. Specifically, by separately taking into account the power consumption of the electronic circuit and the power consumption of the 2D-array oscillator, the temperature difference from a temperature detection location to the surface of the wave transmission/reception face is estimated, and the surface temperature is estimated from the detected temperature and the temperature difference.
1 . An ultrasonic diagnostic device comprising:
an ultrasonic probe comprising
a wave transceiver unit including an oscillator that transmits and receives ultrasonic waves, a wave transmission/reception surface disposed on a living subject side of the oscillator, a substrate, and an electronic circuit electrically connected to the oscillator disposed on the substrate, and
a temperature sensing unit disposed in the wave transceiver unit; and
a temperature estimation unit that estimates a surface temperature of the wave transmission/reception surface based on a wave transmission/reception condition of the ultrasonic waves and, a sensed value sensed by the temperature sensing unit.
2 . The ultrasonic diagnostic device according to claim 1 , wherein
the temperature estimation unit comprises
a temperature difference estimation unit that estimates a difference between the temperature at a temperature sensing position of the temperature sensing unit and the temperature of the wave transmission/reception surface based on the wave transmission/reception condition of the ultrasonic waves; and
a surface temperature estimator that estimates the surface temperature based on the temperature difference and the sensed value from the temperature sensing unit.
3 . The ultrasonic diagnostic device according to claim 2 , wherein
the temperature difference estimation unit estimates the temperature difference based on a power consumption for wave transmission/reception calculated in accordance with the wave transmission/reception condition of the ultrasonic waves.
4 . The ultrasonic diagnostic device according to claim 3 , wherein
the power consumption for wave transmission/reception includes a first power consumption at the electronic circuit and a second power consumption at the oscillator.
5 . The ultrasonic diagnostic device according to claim 1 , wherein
the substrate is a relay board sandwiched between the electronic circuit and the oscillator.
6 . The ultrasonic diagnostic device according to claim 1 , wherein
the temperature sending unit is disposed, in the vicinity of the electronic circuit, on a side of the relay board substrate on which the electronic circuit is disposed.
7 . The ultrasonic diagnostic device according to claim 1 , wherein
the temperature sensing unit comprises a plurality of temperature sensors disposed on the substrate,
the temperature estimation unit defines a reference temperature based on a plurality of temperatures sensed by the plurality of temperature sensors and estimates the surface temperature based on the reference temperature.
8 . The ultrasonic diagnostic device according to claim 7 , wherein
the plurality of temperature sensors are disposed on at least right and left sides of the electronic circuit on the substrate.
9 . The ultrasonic diagnostic device according to claim 7 , wherein
the temperature estimation unit defines, as the reference temperature, a highest temperature among the plurality of temperatures.
10 . The ultrasonic diagnostic device according to claim 1 , wherein
the ultrasonic probe is a probe to be inserted into a body cavity;
the oscillator is a 2D array oscillator; and
the electronic circuit is a transceiver circuit having a channel reduction function that supplies a plurality of transmission signals to the 2D array oscillator and processes a plurality of reception signals from the 2D array oscillator.
11 . The ultrasonic diagnostic device according to claim 1 , further comprising a controller that controls the wave transmission/reception condition of the ultrasonic waves to lower the surface temperature of the wave transmission/reception surface based on the surface temperature of the wave transmission/reception surface.