IP Library › Granted Patent US 12,402,802
Granted Patent B2
US 12,402,802 · App. 17/210,859 · Granted Sep 2, 2025

Avoiding MRI-interference with co-existing systems

Inventors: Shuki Vitek (Haifa, IL); Benny Assif (Ramat Hasharon, IL); Adi Greenberg (Haifa, IL)
Assignee: INSIGHTEC LTD.
A61B5/055A61N7/02A61B8/0808A61B2017/22007A61B2090/374A61B2090/378A61N2007/0078
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Quick Facts
Patent No.
US 12,402,802
App. No.
17/210,859
Granted
Sep 2, 2025
Kind
B2
Abstract

MRI interference with a co-existing ultrasound system may be reduced or avoided by carrying out RF-sensitive operations of the treatment system only when gradient field activity of the MRI system is suppressed.

Claims (28)

1. A system for performing a sequence of ultrasound operations of an anatomic region in conjunction with MR imaging of the region, the sequence of ultrasound operations comprising at least one RF-sensitive operation and at least one RF-insensitive operation, the system comprising:

an MRI apparatus for imaging the anatomic region, the imaging comprising gradient field activity; and

an ultrasound controller in communication with the MRI apparatus, the ultrasound controller (i) initiating the RF-insensitive operation at any time during the MR imaging and (ii) initiating the RF-sensitive operation in response to a signal indicative of the gradient-field-activity suppression,

wherein the at least one RF-sensitive operation includes an operation associated with disturbance by RF excitement signals or the gradient-field-activity suppression, and the at least one RF-insensitive operation includes an operation which is not associated with disturbance by RF excitement signals or the gradient-field-activity suppression.

2. The system of claim 1 , further comprising an MRI controller for operating the MRI apparatus in accordance with a pulse sequence that includes time intervals where the gradient field activity is suppressed, the signal being indicative of the time intervals.

3. The system of claim 1 , further comprising an MRI controller for operating the MRI apparatus in accordance with a pulse sequence, the signal being indicative of an end of the pulse sequence.

4. The system of claim 3 , wherein the ultrasound controller is further configured to trigger repetition of the pulse sequence after completion of the RF-sensitive operation.

5. The system of claim 1 , further comprising an ultrasound apparatus for performing the sequence of ultrasound operations.

6. The system of claim 5 , wherein the ultrasound apparatus comprises at least one of an ultrasound transducer, a cavitation detection device, or a reflection detection device, in communication with the ultrasound controller, for performing the RF-sensitive operation.

7. The system of claim 5 , further comprising an MRI controller, wherein at least one of the ultrasound controller or the MRI controller is configured to adjust an MRI pulse sequence that includes time intervals where the gradient-field activity is suppressed based at least in part on information acquired using at least one of the MRI apparatus or the ultrasound apparatus.

8. The system of claim 7 , wherein the MRI controller is further configured to operate the MRI apparatus in accordance with the adjusted MRI pulse sequence and the signal indicative of the gradient-field-activity suppression is based on the adjusted MRI pulse sequence.

9. The system of claim 7 , wherein the information comprises at least one of a temperature increase at the anatomic region, a signal quality of reflections from the anatomic region, or a movement degree of the anatomic region.

10. The system of claim 1 , further comprising a measurement system for measuring RF signals originating from the MRI apparatus, wherein the controller is further configured to perform the RF-sensitive operation based on the measured RF signals.

11. The system of claim 1 , wherein the MRI apparatus comprises an MRI controller for transmitting the signal indicative of gradient-field-activity suppression to the ultrasound controller.

12. The system of claim 1 , wherein the ultrasound controller is further configured to cause the gradient field activity to be periodically temporarily suppressed.

13. The system of claim 1 , further comprising a system clock for synchronizing the RF-sensitive operation and MR imaging of the anatomic region.

14. A controller for synchronizing an MRI apparatus performing MR imaging, with an ultrasound system performing a sequence of ultrasound operations at least one of which is RF-sensitive operation and at least one of which is RF-insensitive operation, the controller comprising:

a first module for receiving gradient-field-activity suppression information about an MRI pulse sequence specifying time intervals wherein gradient field activity is suppressed;

a second module for (i) initiating the RF-sensitive ultrasound operation at an onset of the gradient-field-activity suppression based on the gradient-field-activity suppression information and (ii) initiating the RF-insensitive operation at any time during the MRI pulse sequence, wherein the RF-sensitive operation includes an operation associated with disturbance by RF excitement signals or the gradient-field-activity suppression, and the RF-insensitive operation includes an operation which is not associated with disturbance by RF excitement signals or the gradient-field-activity suppression.

15. An MRI system operable in conjunction with an ultrasound system for performing MR imaging of an anatomic region in conjunction with a sequence of ultrasound operations of the region, the sequence of ultrasound operations comprising at least one RF-sensitive operation and at least one RF-insensitive operation, the MRI system comprising:

an MRI apparatus for imaging the anatomic region, the imaging comprising gradient field activity; and

an MRI controller for operating the MRI apparatus in accordance with a pulse sequence that includes time intervals where the gradient field activity is suppressed, and signaling gradient-field-activity suppression information including the time intervals related to gradient-field-activity suppression to the ultrasound system so as to (i) cause performance of the RF-sensitive operation during the time intervals related to gradient-field-activity suppression (ii) cause performance of the RF-insensitive operation at any time during the pulse sequence of the MRI apparatus,

wherein the at least one RF-sensitive operation includes an operation associated with disturbance by RF excitement signals or the gradient-field-activity suppression, and the at least one RF-insensitive operation includes an operation which is not associated with disturbance by RF excitement signals or the gradient-field-activity suppression.

16. An ultrasound system operable in conjunction with an MRI system for performing a sequence of ultrasound operations of an anatomic region in conjunction with MR imaging of the region, the sequence of ultrasound operations comprising at least one RF-sensitive operation and at least one RF-insensitive operation, the ultrasound system comprising:

an ultrasound apparatus for performing the sequence of ultrasound operations; and

an ultrasound controller for (i) initiating the RF-insensitive operation at any time during the MR imaging, (ii) initiating performance of the RF-sensitive operation in response to a signal indicative of gradient-field-activity suppression including an end of an MRI pulse sequence comprising gradient field activity, and (iii) triggering repetition of the pulse sequence after completion of the RF-sensitive operation,

wherein the at least one RF-sensitive operation includes an operation associated with disturbance by RF excitement signals or the gradient-field-activity suppression, and the at least one RF-insensitive operation includes an operation which is not associated with disturbance by RF excitement signals or the gradient-field-activity suppression.

17. The ultrasound system of claim 16 , wherein the ultrasound apparatus comprises an ultrasound transducer.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 25, 2025
From: VITEK, SHUKI; ASSIF, BENNY; GREENBERG, ADI
To: INSIGHTEC LTD.
Reel/Frame 070317/0813 →
SECURITY INTEREST Recorded Sep 1, 2022
From: INSIGHTEC, INC.; INSIGHTEC LTD.
To: PERCEPTIVE CREDIT HOLDINGS III, LP
Reel/Frame 061365/0820 →
Continuity (3)
Continuation In Part 15979602 · May 15, 2018
Continuation 13222086 · Aug 31, 2011
Related Publication 20210204830A1 · Jul 8, 2021
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