K013561 · GE Medical Systems · JAK · Nov 8, 2001 · Radiology
Device Facts
Record ID
K013561
Device Name
LIGHTSPEED 4.0 CT SCANNER SYSTEM
Applicant
GE Medical Systems
Product Code
JAK · Radiology
Decision Date
Nov 8, 2001
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 892.1750
Device Class
Class 2
Attributes
3rd-Party Reviewed
Indications for Use
The LightSpeed 4 CT Scanner System is indicated for head and whole body X-ray Computed Tomography applications.
Device Story
LightSpeed 4.0 CT Scanner System is a diagnostic imaging device consisting of a gantry, patient table, console, and computer. It utilizes X-ray technology to acquire cross-sectional images of the head and whole body. The system features a multi-slice solid-state detector with thinner detector elements, enabling the acquisition of 16 slices per rotation. Operated by trained clinicians in a clinical setting, the device processes raw X-ray data to reconstruct images for diagnostic review. The output allows physicians to visualize internal anatomical structures, aiding in clinical decision-making and diagnosis. The system is designed to provide improved imaging capabilities compared to previous iterations while maintaining established safety and performance standards.
Clinical Evidence
Bench testing only. The device underwent system verification and validation to ensure performance to specifications, Federal Regulations, and user requirements. Compliance with industry and international standards (UL 2601-1, IEC 60601-1, 21 CFR 1020.30, 21 CFR 1020.33) was confirmed.
Technological Characteristics
Computed tomography X-ray system. Components: gantry, patient table, console, computer. Detector: multi-slice solid-state with thin elements. Standards: UL 2601-1, IEC 60601-1, 21 CFR Subchapter J. Energy source: X-ray. Connectivity: standard clinical imaging system architecture.
Indications for Use
Indicated for head and whole body X-ray Computed Tomography applications in patients requiring diagnostic imaging.
Regulatory Classification
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.
{0}------------------------------------------------
NOV 0 82001
Image /page/0/Picture/1 description: The image shows the General Electric (GE) logo. The logo consists of the letters 'GE' in a stylized, cursive font, enclosed within a circular border. The letters and the border are solid black, contrasting with the white background. The logo is simple and iconic, representing the well-known multinational conglomerate.
K013561
GE Medical Systems
General Electric Compa
Page 1 of 2
## 510(k) SUMMARY OF SAFETY AND EFFECTIVENESS
This 510(k) summary of Safety and Effectiveness information is submitted in accordance with the requirement of 21 CFR Part 807.87(h).
Larry A. Kroger, Ph.D. Submitter: Senior Regulatory Programs Manager TEL: 262-544-3894, FAX: 262-544-3863 Summary prepared: October 15, 2001
#### PRODUCT IDENTIFICATION
| Name: | LightSpeed 4.0 CT Scanner System |
|----------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Classification Name: | Computed Tomography X-ray System |
| Manufacturer: | General Electric Medical Systems<br>16800 W. Ryerson Road<br>New Berlin, WI 53151 |
| Distributor: | Same as Manufacturer |
| Marketed Devices: | The LightSpeed 4.0 CT Scanner System is of comparable type and<br>substantially equivalent to currently marketed Computed<br>Tomography X-ray Systems that comply with the same or equivalent<br>standards and have the same intended uses. |
### DEVICE DESCRIPTION
The LightSpeed 4.0 CT Scanner System is composed of a gantry, patient table, console, computer, and associated accessories.
Materials: Materials and construction are equivalent to the LightSpeed 3.0 CT Scanner System (K002978) are compliant with UL 2601-1, IEC 60061-1, and 21CFR Subchapter J.
Design: The system is designed to be a head and whole body CT scanner utilizing a new solid state detector, an intuitive Operator Console, and the same tube and similar features to the LightSpeed 3.0 CT Scanner System (K002978), but now capable of imaging 16 slices per rotation. The system will use a new multi-slice detector having thinner detector elements.
{1}------------------------------------------------
#### Indications for Use:
The LightSpeed 4.0 CT Scanner System is indicated for head and whole body X-ray Cor Tomography applications.
#### Comparison with Predicate:
It is the opinion of GE Medical Systems that the LightSpeed 4.0 CT Scanner System is of a type and substantially equivalent to currently marketed head and whole body X-ray computed tomography systems with respect to design, material composition, energy source, and radiation characteristics. It will comply with the X-ray requirements of 21CFR1020.30 and1020.33, as well as the safety requirements of UL2601-1, IEC 60601-1 and collateral standards.
#### Adverse Effects on Health:
Potential electrical, mechanical and radiation hazards are identified in a risk management summary (hazard analysis) and controlled by:
- System verification and validation to ensure performance to specifications, Federal . Requlations, and user requirements.
- Adherence to industry and international standards. (UL/CSA and IEC). .
#### CONCLUSIONS
The LightSpeed 4.0 CT Scanner Systems does not result in any new potential safety risks and performs as well as or better than devices currently on the market. GE considers the LightSpeed 4.0 CT System to be equivalent to other marketed devices with the same indications for use and meeting similar standards.
{2}------------------------------------------------
Image /page/2/Picture/1 description: The image shows the logo for the Department of Health & Human Services - USA. The logo is a circular seal with the department's name around the perimeter. Inside the circle is a stylized image of a caduceus, a symbol often associated with healthcare. The caduceus is depicted with three lines representing the snakes entwined around a staff.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
NOV 0 82001
General Electric Medical Systems % Mr. Reiner Krumme Division Manager, Medical Division TUV Rheinland of North America 12 Commerce Road NEWTOWN CT 06470
Re: K013561
Trade/Device Name: LightSpeed 4.0 CT Scanner System Regulation Number: 21 CFR 892.1750 Regulation Name: Computed tomography x-ray system Regulatory Class: II Product Code: 90 JAK Dated: October 22, 2001 Received: October 26, 2001
Dear Mr. Krumme:
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 for do bear of 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. The I ou may , ators, and second the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration.
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 801); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (sections 531-542 of the Act); 21 CFR 1000-1050.
{3}------------------------------------------------
This letter will allow you to begin marketing your device as described in your 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please 11 you the Office of Compliance at one of the following numbers, based on the regulation number at the top of this letter:
| 8xx.1xxx | (301) 594-4591 |
|----------------------------------|----------------|
| 876.2xxx, 3xxx, 4xxx, 5xxx | (301) 594-4616 |
| 884.2xxx, 3xxx, 4xxx, 5xxx, 6xxx | (301) 594-4616 |
| 892.2xxx, 3xxx, 4xxx, 5xxx | (301) 594-4654 |
| Other | (301) 594-4692 |
Additionally, for questions on the promotion and advertising of your device, please contact the Office of Compliance at (301) 594-4639. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). Other general information on your responsibilities under the Act may be obtained from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its Internet address http://www.fda.gov/cdrh/dsma/dsmamain.html.
Sincerely yours,
Nancy C. Brogdon
Nancy C. Brogdon Director, Division of Reproductive, Abdominal, and Radiological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{4}------------------------------------------------
NOV 0 8 2001
## STATEMENT OF INTENDED USE
K013561
510(k) Number (if known): __ Kor 356 /
Device Name: LightSpeed 4.0 CT Scanner System
#### Indications For Use:
The LightSpeed 4 CT Scanner System is indicated for head and whole body X-ray Computed Tomography applications.
# (PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Prescription Use
(Per 21 CFR 801.109) -OR- Over-The-Counter Use
(Division Sign-Off)
Division of Reproductive, Abdominal,
and Radiological Devices
510(k) Number K013561
Two short videos show you everything — or skip straight to the written tutorial if you'd rather read. You can reopen this any time from the Tutorial button in the top bar.
Part 1 — Search, results, and everyday workflows 16 min
Part 2 — Embeddings: the galaxy map 3 min
1. Search: exact and fuzzy
Type a phrase like "coronary artery calcification" into the search box. You get two kinds of results. Exact results match the literal phrase — prefix searches work ("coronary artery calcificati") but suffix searches do not. Fuzzy results match on the meaning and intent of your phrase rather than the exact words, and are sorted by relevance score. Hover over the Exact or Fuzzy badge on any row to see exactly why it matched.
Use the checkboxes above the results to narrow: SaMD keeps only software-only devices, AI / ML keeps only devices with AI.
Exact vs. fuzzy search: what's the difference?
Exact matches on the literal phrase (prefix search works, suffix does not). Fuzzy matches on the meaning and intent of the phrase rather than the exact words. Hover over the badge on any row to see why it matched.
You search "coronary artery calcification" and want only software devices with AI. What two filters do you apply?
Narrow by SaMD (software-only devices), then narrow by AI/ML (devices with AI).
2. The results table
Scroll right in the results table. The intended use is extracted for you — no need to open the PDF. The device story gives a high-level snapshot of what the device does and how it's used. The AI Performance sub-table shows each output name, acceptance criteria, observed values, and development/test dataset descriptions — the same format Innolitics uses for regulatory strategy outputs, and the fastest high-level fingerprint of an AI device. It is AI-generated but has been very reliable in practice.
Where do you find a device's intended use without opening the PDF?
Scroll right in the search results table. The intended use column is extracted for you; no need to dig into the 510(k) summary PDF.
What does the AI Performance sub-table show, and why is it useful?
Output name, acceptance criteria, observed values, development dataset description, and test dataset description. It's the same format we use for regulatory strategy output and Fast 510(k) input, and the fastest high-level fingerprint of an AI device. AI-generated but reliable in practice.
3. Judging fuzzy relevance
Fuzzy results trail off in relevance as you scroll. Use three signals to decide how far down to go: the fuzzy badge explanations, the intended use column, and whether your target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, you're past the relevant zone. A top hit with a low score (~0.4) and a stretched explanation is a hint the closest predicates are far away — the project may be headed for De Novo. Note the fuzzy search is a pattern match: it doesn't handle negation ("not") well, and hardware devices can appear — filter by SaMD/AI ML to cut them.
How do you judge how far down fuzzy search results to go?
Use the relevancy signals: the fuzzy badge explanations, the intended use column, and whether the target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, results are trailing off in relevancy.
4. Device detail page: chat and citations
Click a device name to open its detail page: device facts on the left, a chat window on the right. Ask something like "Describe the training data". The answer carries little citation bubbles — click one to jump to the highlighted passage in the source PDF, so you can verify every AI answer against the document. There's also a Download PDF button for sharing.
How do you verify an AI chat answer on the device detail page?
Click the citation bubbles to jump to the relevant highlight in the source document.
Reading rule for every project: how many summaries do you read in full?
At least the three most relevant 510(k) or De Novo summaries, in full. After that, use targeted chat questions to confirm your memory quickly. The tool supports this professional habit — it doesn't replace it.
5. Side-by-side comparison
Select multiple rows in the results table (aim for under ~10), then open the PDF Viewer tab. Ask one question — it goes to all selected devices in parallel, each with citations. This is the fastest way to compare and contrast devices: training data, PCCP scope, how they handled adding new scanners, and so on.
What does the side-by-side PDF viewer mode do?
Select multiple devices, open the PDF viewer tab, and ask one question (e.g., "Describe the training data"). It queries all selected devices simultaneously with citations, so you can compare and contrast quickly.
6. Collections
With rows selected, go to the Collections tab and create a labeled collection (e.g., "Cobb Angle Project"). Reload that selection any time — before a client call, pull up the collection and ask questions across all of its devices at once.
How do you save a set of selected devices for later use?
Select the rows, go to the Collections tab, and create a labeled collection (e.g., "Cobb Angle Project"). You can reload the selection anytime and carry it into the PDF viewer and other tabs that support selections.
7. Product codes and the regulations tree
Click a product code in the results to jump to it in the regulations tree — identification text, sibling product codes, and devices you can open in a PDF viewer on the right. Click a regulation number to see its identification, special controls, and related product codes. You can also search by product code or regulation number at the top of the tree. Always read the special controls if any exist for your device — it broadens your search and sharpens pre-kickoff research.
What can you do from the regulations tree view?
Browse product codes and regulation numbers, read the identification text and special controls, browse sibling product codes, open device PDFs on the right, and search by product code or regulation number at the top of the tree.
8. Chart view
Click Show Chart and segment by regulation number (or product code) to see which regulations dominate your result set. Clicking a regulation takes you into the regulations tree. Great for spotting that most matches are, say, hardware laparoscopic devices — a cue to go back and filter.
How do you see which regulations dominate a search result set?
Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
9. The predicate graph
Open the Predicates tab for a family-tree view of predicate relationships. Click a node to trace its parents and children; selections from search carry over pre-selected. Commonly predicated devices are worth reading — a lot of people predicated them for a reason. The visual lineage is also handy on client calls, e.g. to show how a predicate family evolved and justify why your predicate still holds.
In the predicate graph, why are commonly predicated devices worth reading?
A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
10. Embeddings: the galaxy map
The Embeddings tab plots every matching document in a 2-D "galaxy map" where semantically similar devices cluster together. Hover or click clusters to explore, and let AI label the clusters for you. Embeddings beat product codes for grouping: two devices can carry different product codes (LLZ vs. QIH) yet do the same thing — the embedding captures the meaning of the intended use and device story. This is also exactly how retrieval-augmented generation (RAG) works under the hood, and it makes a great visual on client calls.
Try it yourself
Head to the search page and work through a few of these AI/ML fuzzy searches to build intuition: perivascular fat on CT · aortic valve calcification opportunistic screening on noncontrast CT · breast cancer prediction on digital pathology slides · autism detection · gestational age prediction · a hearing aid that can also detect a pulse · foundation model based analysis of ECG · large language models · penetration test. Watch how the relevance scores, intended use, and AI Performance tables tell you when results stop being meaningful.