Method and system for radiation application

• US 10,646,188 B2
• Filed: 04/07/2014
• Issued: 05/12/2020
• Est. Priority Date: 10/23/1998
• Status: Expired due to Term

• Current Assignee: Varian Medical Systems Incorporated (Siemens AG)
• Original Assignee: Varian Medical Systems Incorporated (Siemens AG)
• Inventors: Mostafavi, Hassan, Hampton, Lisa Ann
• Primary Examiner(s): Park, Patricia J
• Application Number:
  US14/246,705
• Publication Number:
  US 20140371581A1
• Time in Patent Office: 2,227 Days
• Field of Search: 600407
• CPC Class Codes: A61B 2090/371 with simultaneous use of two cameras
• CPC Class Codes: A61B 5/0064 Body surface scanning
• CPC Class Codes: A61B 5/0077 Devices for viewing the surface of the body, e.g. camera, magnifying lens
• CPC Class Codes: A61B 5/02028 Determining haemodynamic parameters not otherwise provided for, e.g. cardiac contractility or left ventricular ejection fraction
• CPC Class Codes: A61B 5/055 involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
• CPC Class Codes: A61B 5/1127 using markers
• CPC Class Codes: A61B 5/1128 using image analysis A61B5/1127 takes precedence
• CPC Class Codes: A61B 5/113 occurring during breathing
• CPC Class Codes: A61B 5/7285 for synchronising or triggering a physiological measurement or image acquisition with a physiological event or waveform, e.g. an ECG signal A61B6/5205, A61B6/541, A61B8/5207, A61B8/543 take precedence
• CPC Class Codes: A61B 5/7289 Retrospective gating, i.e. associating measured signals or images with a physiological event after the actual measurement or image acquisition, e.g. by simultaneously recording an additional physiological signal during the measurement or image acquisition
• CPC Class Codes: A61B 5/741 using synthesised speech
• CPC Class Codes: A61B 5/743 Displaying an image simultaneously with additional graphical information, e.g. symbols, charts, function plots
• CPC Class Codes: A61B 6/032 Transmission computed tomography [CT]
• CPC Class Codes: A61B 6/4085 Cone-beams
• CPC Class Codes: A61B 6/4417 related to combined acquisition of different diagnostic modalities
• CPC Class Codes: A61B 6/461 Displaying means of special interest
• CPC Class Codes: A61B 6/463 characterised by displaying multiple images or images and diagnostic data on one display
• CPC Class Codes: A61B 6/465 adapted to display user selection data, e.g. graphical user interface, icons or menus
• CPC Class Codes: A61B 6/5288 involving retrospective matching to a physiological signal
• CPC Class Codes: A61B 6/541 involving acquisition triggered by a physiological signal
• CPC Class Codes: A61B 90/39 : Markers, e.g. radio-opaque or breast lesions markers
• CPC Class Codes: A61N 2005/1059 : using cameras imaging the patient
• CPC Class Codes: A61N 5/1049 : for verifying the position of the patient with respect to the radiation beam
• CPC Class Codes: A61N 5/1064 : for adjusting radiation treatment in response to monitoring
• CPC Class Codes: A61N 5/1067 : in real time, i.e. during treatment

Abstract

A method for generating one or more images includes collecting data samples representative of a motion of an object, acquiring image data of at least a part of the object over a time interval, synchronizing the data samples and the image data to a common time base, and generating one or more images based on the synchronized image data. A method for generating one or more images includes acquiring image data of at least a part of an object over a time interval, associating the image data with one or more phases of a motion cycle, and constructing one or more images using the image data that are associated with the respective one or more phases.

Claims

1. A method for gating an application of radiation to a patient, comprising:

directing a camera at a patient;

generating image data representative of a position of the patient associated with a physiological movement of the patient;

obtaining an amplitude value and a phase value based at least in part on the image data;

combining the amplitude value and the phase value to form a vector;

performing an analysis using the vector; and

gating an application of radiation to the patient based upon a result from the act of performing the analysis.

2. The method of claim 1, further comprising locating a marker block on the patient.

3. The method of claim 2, wherein the marker block comprises two or more markers.

4. The method of claim 1, wherein the gating comprises predictively actuating a gating component.

5. The method of claim 1, further comprising determining deviation from periodicity based on the result from the act of performing the analysis.

6. The method of claim 1, wherein the act of performing the analysis using the vector comprises comparing, using an electronic processing unit, the vector with a cluster of values associated with previous respiration samples.

7. The method of claim 1, wherein the act of performing the analysis using the vector comprises:

comparing, using an electronic processing unit, the vector with a cluster of values in a histogram, the cluster of values associated with previous respiration samples; and

determining, using the electronic processing unit, whether there is deviation from periodicity based on a result from the act of comparing.

8. The method of claim 1, wherein the radiation comprises imaging radiation.

9. The method of claim 1, wherein the act of performing the analysis comprises processing the vector with histogram values.

10. The method of claim 9, wherein the histogram values comprise a plurality of previous vectors.

11. The method of claim 10, wherein each of the previous vectors comprises a breathing amplitude value, and a breathing phase value.

12. The method of claim 1, wherein the phase value is between 0 and 2π

.

13. The method of claim 6, wherein the cluster of values is a part of a histogram.

14. The method of claim 6, wherein the cluster of values comprises a plurality of previous vectors.

15. The method of claim 14, wherein each of the previous vectors comprises a breathing amplitude value, and a breathing phase value.

16. The method of claim 7, wherein the cluster of values comprises a plurality of previous vectors.

17. The method of claim 16, wherein each of the previous vectors comprises a breathing amplitude value, and a breathing phase value.

18. The method of claim 1, wherein the phase value is within a range of possible phase values, and wherein the possible phase values represent respectively different extents of a breathing in a respiratory cycle.