ACOUSTIC WAVE DIAGNOSTIC APPARATUS AND METHOD OF CONTROLLING SAME
First Claim
1. An acoustic wave diagnostic apparatus comprising:
- an acoustic probe for transmitting acoustic waves toward a specimen and outputting an acoustic echo signal representing an acoustic echo from the specimen;
a velocity scale setting device for setting a velocity scale;
a velocity calculation device for calculating velocity of a moving body within the specimen using the acoustic echo signal output from said acoustic probe;
a display control device for displaying information, which indicates velocity calculated by said velocity calculation device, on a display unit in accordance with the velocity scale set by said velocity scale setting device;
a brightness control device for controlling brightness of the display unit; and
a frequency setting device for setting the frequency of pulses used in said brightness control device to a first frequency in a case where a velocity scale that includes a first boundary value, which is less than a threshold value, has been set by said velocity scale setting device, and setting the frequency of pulses used in said brightness control device to a second frequency lower than the first frequency in a case where a velocity scale that includes a second boundary value, which is equal to or greater than the threshold value, has been set by said velocity scale setting device.
1 Assignment
0 Petitions
Accused Products
Abstract
If the boundary value of a velocity scale set in a case where the information indicating the velocity of the moving body is displayed on a liquid crystal panel is less than a threshold value, the frequency of pulses used in pulse-width control is set to 20 kHz in such a manner that noise ascribable to the pulses for pulse-width control will not be displayed on the liquid crystal panel. If the boundary value of the velocity scale is equal to or greater than the threshold value, then the frequency of pulses used in pulse-width control is set to 200 Hz in such a manner that noise ascribable to the pulses for pulse-width control will reside at a position remote from the information indicative of velocity.
0 Citations
10 Claims
-
1. An acoustic wave diagnostic apparatus comprising:
-
an acoustic probe for transmitting acoustic waves toward a specimen and outputting an acoustic echo signal representing an acoustic echo from the specimen; a velocity scale setting device for setting a velocity scale; a velocity calculation device for calculating velocity of a moving body within the specimen using the acoustic echo signal output from said acoustic probe; a display control device for displaying information, which indicates velocity calculated by said velocity calculation device, on a display unit in accordance with the velocity scale set by said velocity scale setting device; a brightness control device for controlling brightness of the display unit; and a frequency setting device for setting the frequency of pulses used in said brightness control device to a first frequency in a case where a velocity scale that includes a first boundary value, which is less than a threshold value, has been set by said velocity scale setting device, and setting the frequency of pulses used in said brightness control device to a second frequency lower than the first frequency in a case where a velocity scale that includes a second boundary value, which is equal to or greater than the threshold value, has been set by said velocity scale setting device. - View Dependent Claims (3, 4, 5, 6, 7, 8)
-
-
2. An acoustic wave diagnostic apparatus comprising:
-
an acoustic probe for transmitting acoustic waves toward a specimen and outputting an acoustic echo signal representing an acoustic echo from the specimen; a velocity scale setting device for setting a velocity scale; a velocity calculation device for calculating velocity of a moving body within the specimen using the acoustic echo signal output from said acoustic probe; a display control device for displaying information, which indicates velocity calculated by said velocity calculation device, on a display unit in accordance with the velocity scale set by said velocity scale setting device; a cooling fan for cooling at least one of said velocity calculation device and display control device; a fan motor for controlling rotation of said cooling fan; and a frequency setting device for setting the frequency of pulses used in said fan motor to a first frequency in a case where a velocity scale that includes a first boundary value, which is less than a threshold value, has been set by said velocity scale setting device, and setting the frequency of pulses used in said fan motor to a second frequency lower than the first frequency in a case where a velocity scale that includes a second boundary value, which is equal to or greater than the threshold value, has been set by the velocity scale setting device.
-
-
9. A method of controlling an acoustic wave diagnostic apparatus, comprising steps of:
-
an acoustic probe transmitting acoustic waves toward a specimen and outputting an acoustic echo signal representing an acoustic echo from the specimen; a velocity scale setting device setting a velocity scale; a velocity calculation device calculating velocity of a moving body within the specimen using the acoustic echo signal output from the acoustic probe; a display control device displaying information, which indicates velocity calculated by the velocity calculation device, on a display unit in accordance with the velocity scale set by the velocity scale setting device; a brightness control device controlling brightness of the display unit; and a frequency setting device setting the frequency of pulses used in the brightness control device to a first frequency in a case where a velocity scale that includes a first boundary value, which is less than a threshold value, has been set by the velocity scale setting device, and setting the frequency of pulses used in said brightness control device to a second frequency lower than the first frequency in a case where a velocity scale that includes a second boundary value, which is equal to or greater than the threshold value, has been set by the velocity scale setting device.
-
-
10. A method of controlling an acoustic wave diagnostic apparatus, comprising steps of:
-
an acoustic probe transmitting acoustic waves toward a specimen and outputting an acoustic echo signal representing an acoustic echo from the specimen; a velocity scale setting device setting a velocity scale; a velocity calculation device calculating velocity of a moving body within the specimen using the acoustic echo signal output from the acoustic probe; a display control device displaying information, which indicates velocity calculated by the velocity calculation device, on a display unit in accordance with the velocity scale set by the velocity scale setting device; a cooling fan cooling at least one of the velocity calculation device and display control device; a fan motor controlling rotation of the cooling fan; and a frequency setting device setting the frequency of pulses used in the fan motor to a first frequency in a case where a velocity scale that includes a first boundary value, which is less than a threshold value, has been set by the velocity scale setting device, and setting the frequency of pulses used in the fan motor to a second frequency lower than the first frequency in a case where a velocity scale that includes a second boundary value, which is equal to or greater than the threshold value, has been set by the velocity scale setting device.
-
Specification