# US 2021/0241895 A1 · Acceptance, commissioning, and ongoing benchmarking of a linear accelerator (linac) using an electronic portal imaging device (epid)

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- Number: US 2021/0241895 A1
- Document ID: US20210241895A1
- Status: Published application
- Kind: A1
- Application number: 17/212,065
- Filed: 2021-03-25
- Published: 2021-08-05
- Earliest claimed: 2014-06-20
- Assignees: Washington University; The Regents of the University of California
- Applicants: Washington University; The Regents of the University of California
- Inventors: Sridhar Yaddanapudi; Sreekrishna M. Goddu; Sasa Mutic; Todd Pawlicki
- Web page: https://patentgrep.com/patent/US20210241895A1

## CPC

- G16H 40/40: for the management of medical equipment or devices, e.g. scheduling maintenance or upgrades
- A61N 5/1075: {for testing, calibrating, or quality assurance of the radiation treatment apparatus}
- A61N 2005/1054: {using a portal imaging system}
- G16H: HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B)

## Abstract

The present invention is a method or system for acceptance testing and commissioning of a LINAC and treatment planning system (TPS). For a LINAC commissioning, the present invention collects reference data from a fully calibrated LINAC and compares the reference data with machine performance data collected from a testing LINAC. The compared results are analyzed to assess accuracy of the testing LINAC. For a TPS commissioning, the present invention collects standard reference data from standard treatment plans and standard input data and compares the standard reference data with results from standard tests that are performed by a testing treatment plan system. The compares results are analyzed to assess accuracy of the testing treatment plan system.

## Claims

### Claim 1

A method for quality assurance testing of a linear accelerator (LINAC), said method comprising:
calibrating a reference machine according to standardized parameters, said reference machine comprising a LINAC and an electronic portal image device (EPID);
adjusting parameters of said LINAC of said reference machine and performing radiation operations with said LINAC of said reference machine;
collecting, based on said radiation operations, radiation measurement data from said EPID of said reference machine;
collecting reference data of said reference machine, said reference data representing differences in radiation measurements at said EPID of said reference machine relative to any changes to said parameters of said LINAC of said reference machine;
storing said reference data in a memory associated with at least one processor associated with said reference machine;
analyzing said reference data via a software analysis program associated with said processor, said processor being configured to execute said software analysis program; and
calibrating another LINAC based on benchmarking relative to said reference data.

### Claim 2 (depends on 1)

The method for quality assurance testing of a linear accelerator (LINAC) of claim 1, further comprising:
executing, via said processor, a computer program associated with said processor, said computer program comprising code for performing at least one LINAC quality assurance test; and
performing said at least one LINAC quality assurance test.

### Claim 3 (depends on 2)

The method for quality assurance testing of a linear accelerator (LINAC) of claim 2, wherein said at least one LINAC quality assurance test comprises at least one of a mechanical quality assurance test and an MLC quality assurance test.

### Claim 4 (depends on 2)

The method for quality assurance testing of a linear accelerator (LINAC) of claim 2, wherein said computer program comprises XML code comprising an XML beam script coded to allow for said performing of said at least one LINAC quality assurance test.

### Claim 5 (depends on 1)

The method for quality assurance testing of a linear accelerator (LINAC) of claim 1, wherein said reference machine comprises a plurality of reference machines, said reference data comprises averaged reference data representing an average of reference data from each of said plurality of reference machines, and said calibrating of said another LINAC is based on benchmarking relative to said averaged reference data.

### Claim 6 (depends on 2)

The method for quality assurance testing of a linear accelerator (LINAC) of claim 2, wherein said computer program is configured as part of a networked service-based system, said service-based system being usable to conduct said at least one LINAC quality assurance test.

### Claim 7

A non-transitory computer-readable recording medium having stored thereon executable instructions that, when executed by a processor of a system comprising a linear accelerator (LINAC), allow for quality assurance testing of a LINAC by executing steps comprising:
calibrating a reference machine according to standardized parameters, said reference machine comprising a LINAC and an electronic portal image device (EPID);
adjusting parameters of said LINAC of said reference machine and performing radiation operations with said LINAC of said reference machine;
collecting, based on said radiation operations, radiation measurement data from said EPID of said reference machine;
collecting reference data of said reference machine, said reference data representing differences in radiation measurements at said EPID of said reference machine relative to any changes to said parameters of said LINAC of said reference machine;
storing said reference data in a memory associated with at least one processor associated with said reference machine;
analyzing said reference data via a software analysis program associated with said processor, said processor being configured to execute said software analysis program; and
calibrating another LINAC based on benchmarking relative to said reference data.

### Claim 8 (depends on 7)

The non-transitory computer-readable recording medium of claim 7, wherein the executable instructions, when executed by said processor, allow for quality assurance testing of said LINAC by further executing steps comprising:
executing, via said processor, a computer program associated with said processor, said computer program comprising code for performing at least one LINAC quality assurance test; and
performing said at least one LINAC quality assurance test.

### Claim 9 (depends on 8)

The non-transitory computer-readable recording medium of claim 8, wherein said at least one LINAC quality assurance test comprises at least one of a mechanical quality assurance test and an MLC quality assurance test.

### Claim 10 (depends on 8)

The non-transitory computer-readable recording medium of claim 8, wherein said computer program comprises XML code comprising an XML beam script coded to allow for said performing of said at least one LINAC quality assurance test.

### Claim 11 (depends on 7)

The non-transitory computer-readable recording medium of claim 7, wherein said reference machine comprises a plurality of reference machines, said reference data comprises averaged reference data representing an average of reference data from each of said plurality of reference machines, and said calibrating of said another LINAC is based on benchmarking relative to said averaged reference data.

### Claim 12 (depends on 8)

The non-transitory computer-readable recording medium of claim 8, wherein said computer program is configured as part of a networked service-based system, said service-based system being usable to conduct said at least one LINAC quality assurance test.

### Claim 13

A system for quality assurance testing of a linear accelerator (LINAC), the system comprising:
a reference machine, said reference machine configured to be calibrated according to standardized parameters and comprising a LINAC and an electronic portal image device (EPID), wherein said LINAC of said reference machine is configured to perform radiation operations, wherein parameters of said LINAC of said reference machine are configured to be adjusted, and wherein said EPID of said reference machine is configured to, based on said radiation operations, generate radiation measurement data; and
a memory associated with at least one processor associated with said reference machine, said memory configured to store said reference data of said reference machine, said reference data representing differences in radiation measurements at said EPID of said reference machine relative to any changes to said parameters of said LINAC of said reference machine, wherein said processor is configured to execute a software analysis program associated with said processor, said software analysis program configured to analyze said reference data of said reference machine, and said reference data is configured to serve as a benchmark for calibration of another LINAC.

### Claim 14 (depends on 13)

The system for quality assurance testing of a linear accelerator (LINAC) of claim 13, wherein the processor is further configured to execute a computer program associated with said processor, said computer program comprising code for configured to allow for at least one LINAC quality assurance test to be performed.

### Claim 15 (depends on 14)

The system for quality assurance testing of a linear accelerator (LINAC) of claim 14, wherein said at least one LINAC quality assurance test comprises at least one of a mechanical quality assurance test and an MLC quality assurance test.

### Claim 16 (depends on 14)

The system for quality assurance testing of a linear accelerator (LINAC) of claim 14, wherein said computer program comprises XML code comprising an XML beam script coded to allow for said at least one LINAC quality assurance test to be performed.

### Claim 17 (depends on 13)

The system for quality assurance testing of a linear accelerator (LINAC) of claim 13, wherein said reference machine comprises a plurality of reference machines, said reference data comprises averaged reference data representing an average of reference data from each of said plurality of reference machines, and said calibration of said another LINAC is based on benchmarking relative to said averaged reference data.

### Claim 18 (depends on 14)

The system for quality assurance testing of a linear accelerator (LINAC) of claim 14, wherein said computer program is configured as part of a networked service-based system, and said at least one LINAC quality assurance test configured to be performed by usage of said service-based system.