FastStroke is a CT image analysis software package that assists in the analysis and visualization of CT data derived from DICOM 3.0 compliant CT scans. FastStroke is intended for the purpose of displaying vasculature of the head and neck at different time points of enhancement.

The software will assist the user by providing optimized display settings to enable fast review of the images in synchronized formats, aligning the display of the order of the scans and linking together multiple groups of scans. In addition, the software fuses the vascular information from different time points into a single colorized view. This multiphase information can aid the physician in visualizing the presence or absence of collateral vessels in the brain. Collateral vessel information may aid the physician in the evaluation of stroke patients.

CT perfusion 4D is an image analysis software package that allows the user to produce dynamic image data and to generate information with regard to changes intensity over time. It supports the analysis of CT perfusion images (in the head and body) after the intravenous injection of contrast, in calculation of the various perfusion-related parameters (i.e. regional blood volume, mean transit time and capillary permeability). The results are displayed in a user-friendly graphic format as parametric images.

This software will aid in the assessment of the extent and type of perfusion, blood volume and capillary permeability changes, which may be related to stroke or tumor angiogenesis and the treatment thereof.

Device Description

NeuroPackage is a solution which contains two medical devices FastStroke and CT Perfusion 4D (Neuro) in order to help streamline the CT Stroke Workflow. The configuration of NeuroPackage enables the user to open a single application, FastStroke, which provides them access to both the updated CT Perfusion 4D and FastStroke applications. However, same as the predicate devices, the capabilities in CT Perfusion 4D and FastStroke can be offered independently.

CT perfusion 4D is an image analysis software package, which allows the user to produce dynamic image data and to generate information with regards to changes in image intensity over time. It supports the analysis of CT Perfusion images (in the head and body) after the intravenous injection of contrast, and calculation of the various perfusion-related parameters (i.e. regional blood flow, regional blood volume, mean transit time and capillary permeability). The results are displayed in a user-friendly graphic format as parametric images.

This software will aid in the assessment of the extent and type of perfusion, blood volume, and capillary permeability changes, which may be related to stroke or tumor angiogenesis and the treatment thereof.

FastStroke is a CT image analysis software package intended for the purpose of displaying stroke workup images (i.e. vasculature of the head, non-contrast head and neck at different time points of enhancement) in a single software, using an optimized workflow. The software is compatible with DICOM 3.0 images and will assist the user by providing dedicated review steps and optimized display settings to enable fast review of the images in synchronized formats. In addition, if a multiphase CT Angiogram has been acquired, the software will fuse the vascular information from these different time points into a single colorized view. This multiphase information can aid the physician in visualizing the presence or absence of collateral vessels in the brain, as well as their delay.

All features from the CT Perfusion 4D Neuro software are accessible in the Perfusion, Set Symmetry and Tissue Classification steps within FastStroke Application, seamlessly introduced in an integrated workflow.

AI/ML Overview

The provided text describes the 510(k) premarket notification for GE Medical Systems SCS's FastStroke and CT Perfusion 4D devices. It highlights the comparison between the proposed devices and their predicate devices.

Here's an analysis of the acceptance criteria and study information, based solely on the provided text. Many aspects of a comprehensive study are not detailed in this summary, as is common in 510(k) executive summaries.

Acceptance Criteria and Reported Device Performance

The acceptance criteria are not explicitly listed in a quantitative table with specific thresholds (e.g., "accuracy > 90%"). Instead, the document states general qualitative criteria and outcomes, primarily focusing on proving substantial equivalence to predicate devices.

The key acceptance criterion described for the brain ventricle segmentation deep learning algorithm is:

"bench tests that compare the output of the new algorithm with ground truth annotated by qualified experts show that the algorithm performed as expected."

The "performed as expected" is a qualitative statement of acceptance. No specific quantitative performance metric (e.g., Dice score, precision, recall, accuracy) or threshold is provided.

Table of Acceptance Criteria and Reported Device Performance:

Feature/Metric	Acceptance Criteria (Stated or Implied)	Reported Device Performance (as per text)
CT Perfusion 4D: Brain Ventricle Segmentation	Output of the new algorithm performs "as expected" when compared to ground truth.	"bench tests... show that the algorithm performed as expected."
FastStroke: All other changes (including email feature)	No new questions of safety and effectiveness compared to predicate device.	"The software testing and the corresponding results... did not raise new questions of safety and effectiveness."
CT Perfusion 4D: All other changes (incl. email, tissue classification)	No new questions of safety and effectiveness compared to predicate device.	"The software testing and the corresponding results... did not raise new questions of safety and effectiveness."
Overall substantial equivalence	Device is as safe and effective as predicate devices.	"considered... to be as safe, as effective as the predicate devices, and is substantially equivalent."

Study Information:

Sample Size Used for the Test Set and Data Provenance:
- Test Set Sample Size: Not specified. The text only mentions "bench tests."
- Data Provenance: Not specified (e.g., country of origin, retrospective/prospective).
Number of Experts Used to Establish Ground Truth for the Test Set and Qualifications:
- Number of Experts: Not specified. The text mentions "qualified experts" (plural).
- Qualifications of Experts: Not specified beyond "qualified experts." (e.g., specialty, years of experience are not mentioned).
Adjudication Method for the Test Set:
- Adjudication Method: Not specified. The general wording "ground truth annotated by qualified experts" does not describe an adjudication process (e.g., consensus, majority rule).
Multi-Reader Multi-Case (MRMC) Comparative Effectiveness Study:
- Was an MRMC study done? No. The document does not describe any study involving human readers or comparative effectiveness with and without AI assistance for either FastStroke or CT Perfusion 4D. The focus appears to be on the performance of the algorithm itself and a comparison to previous versions of the software.
- Effect Size of Human Reader Improvement: Not applicable, as no MRMC study was described.
Standalone Performance (Algorithm Only without Human-in-the-Loop Performance):
- Was a standalone study done? Yes, implicitly. The "bench tests" of the brain ventricle segmentation deep learning algorithm, where its "output" was compared to ground truth, describe a standalone evaluation of the algorithm's performance. The statement "The modified CT Perfusion 4D software employs a deep learning convolutional network to segment the brain ventricles while the predicate device uses a manual method based on HU thresholding" further supports this.
Type of Ground Truth Used:
- Brain Ventricle Segmentation: "ground truth annotated by qualified experts." This suggests expert consensus or annotation rather than pathology or outcomes data.
- Other changes: For other changes, it's implied that the "ground truth" for showing non-inferiority was based on comparison to the established performance and safety of the predicate devices, likely through verification and validation tests rather than an independent "ground truth" dataset for clinical outcomes.
Sample Size for the Training Set:
- Training Set Sample Size: Not specified. This information is typically proprietary or not included in summary documents.
How Ground Truth for the Training Set Was Established:
- Ground Truth Establishment for Training: Not specified. It's common for ground truth for training data to be established similarly to test data (e.g., expert annotation), but this document does not explicitly state it.

Summary

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Image /page/0/Picture/0 description: The image contains two logos. The logo on the left is the Department of Health & Human Services logo. The logo on the right is the FDA logo, which stands for U.S. Food & Drug Administration. The FDA logo is in blue.

November 12, 2020

GE Medical Systems SCS % Ms. Elizabeth Mathew Senior Regulatory Affairs Manager 283 rue de la Miniere Buc. 78530 FRANCE

Re: K193289

Trade/Device Name: FastStroke, CT Perfusion 4D Regulation Number: 21 CFR 892.1750 Regulation Name: Computed tomography x-ray system Regulatory Class: Class II Product Code: JAK, LLZ Dated: October 7, 2020 Received: October 8, 2020

Dear Ms. Mathew:

We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. Although this letter refers to your product as a device, please be aware that some cleared products may instead be combination products. The 510(k) Premarket Notification Database located at https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpmn/pmn.cfm identifies combination product submissions. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.

If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.

Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part

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801); medical device reporting of medical device-related adverse events) (21 CFR 803) for devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reportingcombination-products); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.

Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to https://www.fda.gov/medical-device-safety/medical-device-reportingmdr-how-report-medical-device-problems.

For comprehensive regulatory information about mediation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medicaldevices/device-advice-comprehensive-regulatory-assistance) and CDRH Learn (https://www.fda.gov/training-and-continuing-education/cdrh-learn). Additionally, you may contact the Division of Industry and Consumer Education (DICE) to ask a question about a specific regulatory topic. See the DICE website (https://www.fda.gov/medical-device-advice-comprehensive-regulatoryassistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).

Sincerely,

Thalia T. Mills, Ph.D. Director Division of Radiological Health OHT7: Office of In Vitro Diagnostics and Radiological Health Office of Product Evaluation and Quality Center for Devices and Radiological Health

Enclosure

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Indications for Use

510(k) Number (if known) K193289

Device Name

FastStroke

Indications for Use (Describe)

Type of Use (Select one or both, as applicable)
-------------------------------------------------	--

Prescription Use (Part 21 CFR 801 Subpart D)

Over-The-Counter Use (21 CFR 801 Subpart C)

CONTINUE ON A SEPARATE PAGE IF NEEDED.

This section applies only to requirements of the Paperwork Reduction Act of 1995.

*DO NOT SEND YOUR COMPLETED FORM TO THE PRA STAFF EMAIL ADDRESS BELOW."

The burden time for this collection of information is estimated to average 79 hours per response, including the time to review instructions, search existing data sources, gather and maintain the data needed and complete and review the collection of information. Send comments regarding this burden estimate or any other aspect of this information collection, including suggestions for reducing this burden, to:

Department of Health and Human Services Food and Drug Administration Office of Chief Information Officer Paperwork Reduction Act (PRA) Staff PRAStaff@fda.hhs.gov

"An agency may not conduct or sponsor, and a person is not required to respond to, a collection of information unless it displays a currently valid OMB number."

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Indications for Use

510(k) Number (if known) K193289

Device Name

CT Perfusion 4D

Indications for Use (Describe)

Type of Use (Select one or both, as applicable)
-------------------------------------------------	--

Prescription Use (Part 21 CFR 801 Subpart D)

Over-The-Counter Use (21 CFR 801 Subpart C)

CONTINUE ON A SEPARATE PAGE IF NEEDED.

This section applies only to requirements of the Paperwork Reduction Act of 1995.

DO NOT SEND YOUR COMPLETED FORM TO THE PRA STAFF EMAIL ADDRESS BELOW.

Department of Health and Human Services Food and Drug Administration Office of Chief Information Officer Paperwork Reduction Act (PRA) Staff PRAStaff@fda.hhs.gov

"An agency may not conduct or sponsor, and a person is not required to respond to, a collection of information unless it displays a currently valid OMB number."

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Image /page/4/Picture/0 description: The image shows the General Electric (GE) logo. The logo consists of the letters 'GE' written in a stylized script, enclosed within a circular frame. The logo is colored in blue, with the letters and the frame appearing in the same shade of blue.

510(k) Summary

K193289

In accordance with 21 CFR 807.92 the following summary of information is provided:

Date:	November 5, 2020
Submitter:	GE Medical Systems SCS
	Establishment Registration Number - 9611343
	283 rue de la Miniere
	78530 Buc, France
Primary ContactPerson:	Elizabeth MathewSenior Regulatory Affairs ManagerGE Healthcare, (GE Medical Systems, LLC)3000 N Grandview Blvd.,Waukesha, WI - 53188Phone: (262) 424-7774Email: Elizabeth.Mathew@ge.com
Secondary ContactPerson:	Helen PengSr. Regulatory Affairs DirectorGE Healthcare, (GE Medical Systems, LLC)3000 N Grandview Blvd.,Waukesha, WI - 53188Phone: 262-424-8222Email: Hong.Peng@ge.com
Proposed Device:
Device Name:	FastStroke, CT Perfusion 4D
Common/UsualName:	FastStroke, CT Perfusion 4DFastStroke Gen 2
Primary Regulationnumber:	CFR 892.1750 Computed Tomography X-Ray System
Primary ProductCode:	JAK
SecondaryRegulation number:	21 CFR 892.2050 Picture archiving and communications system
Secondary ProductCode:	LLZ
Classification:	Class II

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Image /page/5/Picture/0 description: The image shows the General Electric (GE) logo. The logo consists of the letters 'GE' written in a stylized script, enclosed within a blue circle. Three stylized swirls surround the circle, giving the logo a dynamic and recognizable appearance.

GE Healthcare 510(k) Premarket Notification Submission

Predicate Device:
Device Name:	FastStroke
510(k) number:	K163281 cleared on January 26, 2017
Regulation number/Product Code:	21 CFR 892.1750 Computed Tomography X-Ray SystemJAK
Classification:	Class II
Manufacturer:	GE Medical Systems SCS
Predicate Device:
Device Name:	CT Perfusion 4
510(k) number:	K052839 cleared on March 10, 2006
Regulation number/Product Code:	21 CFR 892.1750 Computed Tomography X-Ray SystemJAK
Classification:	Class II
Manufacturer:	GE Medical Systems SCS

Device Description:

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Image /page/6/Picture/0 description: The image shows the General Electric (GE) logo. The logo consists of the letters 'GE' in a stylized, cursive font, enclosed within a blue circle. The circle is surrounded by a swirling, decorative pattern, also in blue. The logo is simple, recognizable, and represents the multinational conglomerate corporation.

Intended use:

The software will assist the user by providing optimized display settings to enable fast review of the images in synchronized formats, aligning the display of the images to the scans and linking together multiple groups of scans. In addition, the software fuses the vascular information from different time points into a single colorized view. This multiphase information can aid the physician in visualizing the presence or absence of collateral vessels in the brain. Collateral vessel information may aid the physician in the evaluation of stroke patients.

CT perfusion 4D is an image analysis software package that allows the user to produce dynamic image data and to generate information with regard to changes in image intensity over time. It supports the analysis of CT perfusion images (in the head and body) after the intravenous injection of contrast, in calculation of the various perfusion-related parameters (i.e. regional blood flow, regional blood volume, mean transit time and capillary permeability). The results are displayed in a user-friendly graphic format as parametric images.

Indications for use:

The software will assist the user by providing optimized display settings to enable fast review of the images in synchronized formats, aligning the display of the images to the order of the scans and linking together multiple groups of scans. In addition, the software fuses the vascular information from different time points into a single colorized view. This multiphase information can aid the physician in visualizing the presence or absence of collateral vessels in the brain. Collateral vessel information may aid the physician in the evaluation of stroke patients.

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Image /page/7/Picture/0 description: The image shows the logo for General Electric (GE). The logo is a blue circle with the letters "GE" in a stylized font in the center. The circle has a decorative border with small, teardrop-shaped elements around the perimeter. The blue color is a medium shade, and the overall design is clean and recognizable.

parametric images.

Technological Characteristic:

NeuroPackage solution contains modified FastStroke and CT Perfusion 4D applications. For the modified Faststroke software, there is no change in technology with respect to the clinical functionality of the software. However modified FastStroke and CT Perfusion 4D software contain an additional export capability in order to enable the email notification feature. The modified CT Perfusion 4D software employs a deep learning convolutional network to segment the brain ventricles while the predicate device uses a manual method based on HU thresholding. There is no technology change in comparison to the predicate device for the changes to Tissue Classification in the modified CT Perfusion 4D software. These changes do not change the Indications for Use from the predicate, and represent equivalent technological characteristics, with no impact on control mechanism, and operating principle.

Comparison

The table below summarizes the feature/technological comparison between the predicate device and the proposed device:

FastStroke:

Specification	Predicate DeviceFastStroke(K163281)	Proposed DeviceFastStroke	Comparison
Send EmailFeature	Not Available	Results from preprocessingwill be populated into emailand sent to pre-defineddistribution list automatically.	Substantial EquivalentImproved method todistribute the report tofacilitate user workflow

CT Perfusion 4D:

Specification	Predicate DeviceCT Perfusion 4(K052839)	Proposed DeviceCT Perfusion 4D	Comparison
Map Creation	Automatic based on HUthresholding	Automatic Deep LearningAlgorithm	Substantial EquivalentImproved method forremoving ventricles
TissueClassification	In tissue classification itis restricted which inputparameters can be used(Blood Volume only for	In tissue classification thereis no restriction as thesoftware allows the user toselect from 4 input	Substantial EquivalentProposed device allowsadditional input maps

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Image /page/8/Picture/0 description: The image shows the General Electric (GE) logo. The logo consists of the letters 'GE' written in a stylized script, enclosed within a blue circle. The letters are white, creating a contrast against the blue background.

	1st segmentation, BloodFlow, TMax or MTT onlyfor modified perfusion).	parameters (Blood Volume,Blood Flow, TMax, MTT) togenerate the tissueclassification display.	for Tissue Classification
Send EmailFeature	Manual method to exportthe report.	Report with the images willbe populated into email andsent to pre-defineddistribution listautomatically.	Substantial EquivalentImproved method todistribute the report

Determination of Substantial Equivalence:

NeuroPackage solution which contains FastStroke and CT Perfusion 4D software has successfully completed the required design control activities per GE's quality management system that complies to Quality System Regulations of 21CFR 820 and ISO 13485. The following quality assurance measures have been applied to the development of the device:

Risk Analysis and Mitigation
. Requirements Reviews
. Design Reviews
Performance testing (Verification, Validation) ●
. Safety testing (Verification)

For the brain ventricle segmentation deep learning algorithm, bench tests that compare the output of the new algorithm with ground truth annotated by qualified experts show that the algorithm performed as expected.

The software testing and the corresponding results for all the other changes in FastStroke and CT Perfusion 4D software contained in NeuroPackage solution did not raise new questions of safety and effectiveness from those associated with predicate devices and demonstrated that modified FastStroke and CT Perfusion 4D performs substantially equivalent to the predicate devices.

The substantial equivalence was also based on software documentation for a "Moderate" level of concern device.

Conclusion

GE Healthcare considers the modifications to FastStroke and CT Perfusion 4D contained within the NeuroPackage solution to be as safe, as effective as the predicate devices, and is substantially equivalent to the predicate devices.

Regulation Number and Section

§ 892.1750 Computed tomography x-ray system.

(a)
Identification. A computed tomography x-ray system is a diagnostic x-ray system intended to produce cross-sectional images of the body by computer reconstruction of x-ray transmission data from the same axial plane taken at different angles. This generic type of device may include signal analysis and display equipment, patient and equipment supports, component parts, and accessories.(b)
Classification. Class II.