# US 5,820,553 A · Identification system and method for radiation therapy

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- Number: US 5,820,553 A
- Document ID: US5820553A
- Status: Granted
- Kind: A
- Application number: 08/708,065
- Filed: 1996-08-16
- Granted: 1998-10-13
- Earliest claimed: 1996-08-16
- Assignees: Siemens Medical Systems, Inc.
- Inventors: John H. Hughes
- Web page: https://patentgrep.com/patent/US5820553A

## CPC

- A61N 5/1049: {for verifying the position of the patient with respect to the radiation beam}
- A61B 6/08: Auxiliary means for directing the radiation beam to a particular spot, e.g. using light beams
- A61N 2005/1059: {using cameras imaging the patient}
- 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)
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A system and method for identifying and processing individual patients among a set of patients includes storing position data representative of patient-unique arrangements of targets that are affixed to the patients for aligning a therapeutic radiation beam. Subsequent to the recording of the position data, a particular patient and/or the medical information of the particular patient can be identified by reimaging the targets or substitute targets on the particular patient to detect a correlation between the image data and the stored position data. The correlation may be used to register a patient, track the location of the patient within a multi-station facility, or facilitate treatment setup, such as beam-to-patient alignment, radiation configuration, and beam control.

## Claims

### Claim 1

A system for identifying a medical patient among a plurality of patients for localized radiation therapy comprising:
memory means for storing position data representative of arrangements of targets affixed to said plurality of patients for aligning said patients relative to a source of radiation, each arrangement of targets being unique to one of said patients;
imaging means for generating image data responsive to positions of said targets on a particular patient;
processing means, connected to said memory means and said imaging means, for comparing said image data from said imaging means with said position data stored in said memory means; and
identification means, responsive to said processing means, for identifying said particular patient based upon detecting a correlation between said image data and said position data.

### Claim 2 (depends on 1)

The system of claim 1 wherein said imaging means includes a plurality of cameras and wherein said imaging data is indicative of target positions in three-dimensional space.

### Claim 3 (depends on 1)

The system of claim 1 further comprising a plurality of said imaging means and a patient-tracking means for determining location of at least one of said patients in a multi-station medical environment.

### Claim 4 (depends on 1)

The system of claim 1 wherein said imaging means has a field of view that is spaced apart from said particular patient when said particular patient is aligned to receive radiation from said source of radiation.

### Claim 5 (depends on 4)

The system of claim 4 further comprising a second memory means for storing data indicative of a treatment plan for each of said plurality of patients, said second memory means being responsive to said identification means such that a treatment plan associated with said particular patient is automatically accessed upon identifying said particular patient.

### Claim 6 (depends on 1)

The system of claim 1 wherein said imaging means has a field of view that includes said particular patient when said particular patient is aligned to receive radiation from said source of radiation, said system further comprising means for automatically setting up a radiation treatment in response to identification of said particular patient by said identification means.

### Claim 7 (depends on 6)

The system of claim 6 further comprising a session manager, connected to said means for automatically setting up a radiation treatment, for manipulating a patient table, a source of radiation and radiation beam parameters.

### Claim 8 (depends on 1)

The system of claim 1 further comprising display means, responsive to said identification means, for displaying information relating to said particular patient.

### Claim 9 (depends on 1)

The system of claim 1 further comprising input means for requesting and receiving user confirmation of accuracy of said identifying said particular patient by said identification means.

### Claim 10 (depends on 1)

The system of claim 1 further comprising said targets, said targets being retroflective members, said imaging means being at least two cameras.

### Claim 11

A method of processing medical patients for radiation therapy comprising steps of:
affixing targets relative to individual patients for whom radiation therapy is prescribed such that each patient is associated with a unique pattern of positions of said targets;
recording each of said patterns in memory;
establishing a correspondence between each recorded pattern and the patient associated with said recorded pattern;
recording medical information, including recording at least one of a patient radiation treatment plan, a medical history, and patient-location tracking data for each of said patients; and
automatically accessing said medical information based upon recognition of one of said patterns, including imaging targets on one of said patients and matching a pattern of said imaged targets with one of said recorded patterns and including accessing said recorded medical information for the patient associated with said matched recorded pattern.

### Claim 12 (depends on 11)

The method of claim 11 wherein said step of automatically accessing said medical information comprises a step of accessing setup parameters of a radiation therapy session.

### Claim 13 (depends on 11)

The method of claim 11 further comprising a step of downloading said medical information to a session manager of a radiation system and utilizing said medical information to automatically align said patient relative to a source of radiation and to automatically establish a radiation beam geometrical pattern and prescribed radiation beam parameters.

### Claim 14 (depends on 13)

The method of claim 13 further comprising a step of displaying said downloaded medical information to an operator of said radiation system.

### Claim 15 (depends on 11)

The method of claim 11 further comprising repeating said steps of imaging said targets of said patient and matching said patterns each time that said patient is transferred to a different facility in a multi-facility medical environment, thereby tracking the location of said patient.

### Claim 16

A method of processing a medical patient for a radiation therapy session comprising steps of:
affixing targets to said patient in a pattern that is unique to said patient;
generating image data of said targets;
determining positions of said targets in three-dimensional space based upon said image data;
comparing said positions to stored position data representative of positions of targets that were affixed to patients during prior radiation therapy sessions; and
if a match is detected between said positions of targets affixed to said patient and positions of targets during a prior session, downloading medical information regarding said patient, said medical information including at least one of a patient radiation treatment plan, a medical history, and patient location tracking information, said downloading being based upon an association in memory between said medical information and said positions of targets during said prior session, thereby using said position data as an identifier of said patient.

### Claim 17 (depends on 16)

The method of claim 16 wherein said step of downloading said medical information includes downloading setup parameters for said radiation therapy session.

### Claim 18 (depends on 17)

The method of claim 17 further comprising automatically establishing a specified patient-to-source relationship specified by said setup parameters, wherein an alignment of said patient relative to a source of therapeutic radiation is determined by said downloaded setup parameters and wherein radiation beam parameters are automatically established.

### Claim 19 (depends on 16)

The method of claim 16 further comprising a step of requesting confirmation of accuracy of using said position data as said identifier of said patient.