Operator supervised temperature control system and method for an ultrasound transducer

• US 6,663,578 B1
• Filed: 10/11/2002
• Issued: 12/16/2003
• Est. Priority Date: 10/11/2002
• Status: Expired due to Fees

• Current Assignee: Philips Electronics North America Corporation (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Miller, David, Salgo, Ivan, Peszynski, Michael
• Primary Examiner(s): Ruhl, Dennis
• Assistant Examiner(s): Jain, Ruby
• Application Number:
  US10/269,144
• Time in Patent Office: 431 Days
• Field of Search: 601/2, 601/1, 601/159, 601/169, 600/437, 600/438, 600/459, 600/462, 600/466, 600/467, 600/471, 600/439, 604/22, 607/102
• US Class Current: 601/2
• CPC Class Codes: A61B 8/00 Diagnosis using ultrasonic, sonic or infrasonic waves imaging of objects using sonar G01S15/00
• CPC Class Codes: A61B 8/461 Displaying means of special interest
• CPC Class Codes: A61B 8/467 characterised by special input means
• CPC Class Codes: A61B 8/546 involving monitoring or regulation of device temperature

Abstract

A system and method for controlling the heat of an ultrasonic transducer is disclosed. In the presently preferred embodiments, the operator selects one or more mutable system parameters of the ultrasound system which will be changed if either the temperature becomes too great, or at the operator'"'"'s command, or both.

Claims

1. A method of cooling an imaging ultrasonic transducer in an imaging ultrasonic transducer system, wherein a patient-contacting surface of said imaging ultrasonic transducer is pressed externally against the skin of a patient in order to generate an image, comprising the steps of:

selecting by an operator at least one mutable system parameter of the imaging ultrasonic transducer system;

determining a temperature of the imaging ultrasonic transducer at the patient-contacting surface; and

implementing a parameter change in the selected at least one mutable system parameter based on the determined temperature, wherein the parameter change will cause a reduction, if necessary, in the temperature of the patient-contacting surface of the imaging ultrasonic transducer to prevent damage to the skin of the patient and pain to the patient.

2. The method of claim 1, further comprising the step of:

presenting to the operator at least one mutable system parameter of the imaging ultrasonic transducer system in order for the operator to select at least one mutable system parameter.

3. The method of claim 1, further comprising the steps of:

selecting, by the operator, the parameter change in the selected at least one mutable system parameter.

4. The method of claim 1, wherein the step of implementing the parameter change in at least one mutable system parameter based on the determined temperature comprises the steps of:

determining if the determined temperature is greater than, or equal to, a threshold temperature; and

implementing, if it is determined that the determined temperature is greater than, or equal to, a threshold temperature, the parameter change in at least one mutable system parameter.

5. The method of claim 4, wherein said step of selecting by the operator at least one mutable system parameter of the imaging ultrasonic transducer system occurs after it has been determined that the determined temperature is greater than, or equal to, a threshold temperature.

6. The method of claim 4, further comprising the step of:

selecting by the operator the threshold temperature.

7. The method of claim 1, wherein the step of implementing the parameter change in at least one mutable system parameter based on the determined temperature is comprised of the step of:

changing the at least one system parameter, wherein an amount of change in the at least one mutable system parameter is based on an amount of temperature variation from a predetermined operating temperature value.

8. The method of claim 1, wherein said step of selecting by the operator at least one mutable system parameter of the imaging ultrasonic transducer system comprises the step of:

selecting a rule by which the ultrasonic transducer system will implement a rule-based change in the step of implementing the parameter change in the selected at least one mutable system parameter based on the determined temperature.

9. The method of claim 1, wherein a basis of the parameter change is at least one of:

an amount the determined temperature is above or below a predetermined operating temperature value;

or

whether the determined temperature is equal to or greater than a predetermined threshold temperature value.

10. The method of claim 1, further comprising the step of:

resetting the at least one mutable system parameter back to an original state, said original state being a state of the at least one mutable system parameter before the parameter change was implemented.

11. The method of claim 10, wherein the resetting step is at least one of:

a) initiated by an operator of the imaging ultrasonic transducer system, b) initiated by the imaging ultrasonic transducer system when the imaging ultrasonic transducer has cooled sufficiently, and c) initiated by then imaging ultrasonic transducer system after a prescribed period of time.

12. The method as recited in claim 1, further comprising the steps of determining by the imaging ultrasonic transducer system whether the determined temperature of the patient-contacting surface of the imaging ultrasonic transducer is greater than or equal to a critical temperature;

turning the imaging ultrasonic transducer off if it is determined that the determined temperature is greater than or equal to the critical temperature; and

once the imaging ultrasonic transducer has been turned off;

determining a current temperature of the patient-contacting surface of the imaging ultrasonic transducer;

determining whether the current temperature is less than the critical temperature; and

turning the imaging ultrasonic transducer back on if it is determined that the current temperature is less than the critical temperature.

13. The method as recited in claim 1, wherein the at least one mutable system parameter comprises at least one of:

duty cycle, wherein the duty cycle is a ratio of the time in which the imaging ultrasonic transducer is transmitting to the time in which the imaging ultrasonic transducer is receiving;

applied voltage to transmitting elements in the imaging ultrasonic transducer;

frequency of ultrasonic sound waves transmitted by the imaging ultrasonic transducer;

frame rate of the imaging ultrasonic transducer;

pulse repetition frequency (PRF) of the imaging ultrasonic transducer;

aperture of the imaging ultrasonic transducer;

imaging depth of the imaging ultrasonic transducer;

sector width of the imaging ultrasonic transducer; and

imaging mode of the imaging ultrasonic transducer.

14. A system for cooling an imaging ultrasonic transducer in an imaging ultrasonic transducer system, comprising:

a patient-contacting surface of said imaging ultrasonic transducer for pressing externally against the skin of a patient in order to generate an image;

a user interface by which an operator may select at least one mutable system parameter from a displayed at least one mutable system parameter;

at least one temperature sensor for sensing the temperature of the patient-contacting surface of the ultrasonic transducer; and

a controller for implementing a parameter change in a selected at least one mutable system parameter based on the sensed temperature, wherein the parameter change will cause a reduction in the temperature of the patient-contacting surface of the imaging ultrasonic transducer to prevent damage to the skin of the patient and pain to the patient.

15. The system of claim 14, further comprising:

means for presenting to the operator at least one mutable system parameter of the imaging ultrasonic transducer system in order for the operator to select at least one mutable system parameter.

16. The system of claim 14 further comprising:

means for selecting, by the operator, the parameter change in the selected at least one mutable system parameter.

17. The system of claim 14, further comprising the step of:

means for resetting the at least one mutable system parameter back to an original state, said original state being a state of the at least one mutable system parameter before the parameter change was implemented.

18. The system of claim 14, wherein the at least one mutable system parameter comprises at least one of:

duty cycle, wherein the duty cycle is a ratio of the time in which the imaging ultrasonic transducer is transmitting to the time in which the imaging ultrasonic transducer is receiving;

applied voltage to transmitting elements in the imaging ultrasonic transducer;

frequency of ultrasonic sound waves transmitted by the imaging ultrasonic transducer;

frame rate of the imaging ultrasonic transducer;

pulse repetition frequency (PRF) of the imaging ultrasonic transducer;

aperture of the imaging ultrasonic transducer;

imaging depth of the imaging ultrasonic transducer;

sector width of the imaging ultrasonic transducer; and

imaging mode of the imaging ultrasonic transducer.