PMD Viewer is intended to provide the same data viewing, playback, and report generation features of its predicate (parent) device, TCD100M/PMD150, Doppler ultrasound studies, offline on a standard PC. The data consists of previously acquired information on cerebral arterial blood flow velocity measurements and the occurrence of micro-embolic signals in the cerebral arterial blood flow. PMD Viewer operates exclusively as a stand-alone software product on a standard PC. PMD Viewer is intended for use by a technologist or physician trained in the use of Doppler ultrasound. PMD Viewer is NOT intended to replace any means of evaluating vital patient physiological processes. No new intended uses are claimed.
Device Story
PMD Viewer is a software-only application for off-line review of transcranial Doppler ultrasound studies; inputs consist of proprietary binary files containing cerebral arterial blood flow velocity measurements and micro-embolic signal data previously acquired by the Spencer Technologies TCD100M/PMD150 system. The software runs on standard PCs (Windows XP/Vista) and enables physicians or technologists to view, playback, and generate reports from these studies without image compression. The device does not acquire original images or control life-sustaining equipment; it serves as a diagnostic review tool. Healthcare providers use the output to interpret cerebral blood flow data, supporting clinical decision-making regarding patient vascular status. The device benefits patients by allowing remote or off-line analysis of diagnostic ultrasound data by trained specialists.
Clinical Evidence
No clinical data. The device is a software-only viewer for previously acquired diagnostic data; substantial equivalence is based on technological characteristics and functional comparison to predicate devices.
Technological Characteristics
Software-only medical image viewer; operates on standard PC hardware (Windows XP/Vista). Supports DICOM and proprietary TCD100M/PMD150 binary file formats. Connectivity via network or magneto-optical drive. No patient-contacting components. Does not perform image acquisition or life-sustaining control.
Indications for Use
Indicated for technologists or physicians trained in Doppler ultrasound to view, playback, and generate reports from previously acquired transcranial Doppler ultrasound studies (cerebral arterial blood flow velocity and micro-embolic signals) on a standard PC. Not for use in evaluating vital patient physiological processes.
Regulatory Classification
Identification
A medical image management and processing system is a device that provides one or more capabilities relating to the review and digital processing of medical images for the purposes of interpretation by a trained practitioner of disease detection, diagnosis, or patient management. The software components may provide advanced or complex image processing functions for image manipulation, enhancement, or quantification that are intended for use in the interpretation and analysis of medical images. Advanced image manipulation functions may include image segmentation, multimodality image registration, or 3D visualization. Complex quantitative functions may include semi-automated measurements or time-series measurements.
Special Controls
*Classification.* Class II (special controls; voluntary standards—Digital Imaging and Communications in Medicine (DICOM) Std., Joint Photographic Experts Group (JPEG) Std., Society of Motion Picture and Television Engineers (SMPTE) Test Pattern).
TCD 100M/PMD150 Diagnostic Ultrasound System (K002533)
Submission Summary (Full Text)
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#### 5. 510(K) SUMMARY
K092204
## A. Submitter
Spencer Technologies 701 16th Avenue Seattle, WA 98122 USA 206-329-7220
# B. Establishment Registration Number: 3033518
# C. Contact
OCT - 8 2009
| Name | Tony Williams |
|------------|-----------------------------------------|
| Title | VP Quality Assurance/Regulatory Affairs |
| Telephone: | 206-329-7220 x118 |
| FAX: | 206-329-7230 |
| Email: | williamstc@spencertechnologies.com |
# D. Submission Date: 16 July 2009
#### E. Trademark and Common Name
Spencer Technologies PMD Viewer
# F. Classification of the device
| Classification Name | Picture Archival and Communications System |
|----------------------|--------------------------------------------|
| Classification Panel | Radiology |
| CFR Number | 21 CFR 892.2050 |
| Device Class | Class II |
| Product Code | LLZ |
# G. Predicate Device
The PMD Viewer, addressed in this premarket notification, is substantially equivalent to the following commercially available devices:
| Manufacturer | Trade Name | 510(k) No | Product Code |
|----------------------|-------------------------------------------------|-----------|--------------|
| Acuson Corporation | CSV12 Software Viewer | K022896 | 90 LLZ |
| Spencer Technologies | TCD 100M/PMD150 Diagnostic<br>Ultrasound System | K002533 | 90 IYN |
Note: In this document we refer to the Acuson Viewer as the "predicate device", and to the PMD Viewer as the "predicate (parent) device".
#### H. Device Description
This device is a software-only version of the Spencer Technologies digital Transcranial Doppler ultrasound system, the TCD100M/PMD150, and is described as the PMD Viewer.
The modification of the TCD100M/PMD150 implemented in the PMD Viewer provides physicians and technologists with the same data viewing, playback, and report generation features of the TCD100M/PMD150 off-line on a standard PC utilizing Windows XP SP2 or VISTA. All software features can be controlled with a standard keyboard and wheel mouse. Because it can read the proprietary binary file formats of the predicate (parent) device, the TCD100M/PMD150, the PMD Viewer displays images without any compression, duplicating the original quality of the images on the TCD100M/PMD150.
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#### -Intended Use
PMD Viewer is intended to provide the same data viewing, playback, and report generation features of its predicate (parent) device, TCD100M/PMD150, Doppler ultrasound studies, offline on a standard PC. The data consists of previously acquired information on cerebral arterial blood flow velocity measurements and the occurrence of micro-embolic signals in the cerebral arterial blood flow. PMD Viewer operates exclusively as a stand-alone software product on a standard PC. PMD Viewer is intended for use by a technologist or physician trained in the use of Doppler ultrasound. PMD Viewer is NOT intended to replace any means of evaluating vital patient physiological processes. No new intended uses are claimed.
### J. Technological Characteristics and Substantial Equivalence
PMD Viewer is a medical image device that is used with computer hardware in a picture archiving and communications system user environment. It has the same intended use and technical characteristics as the predicate device, the Acuson Corporation CSV12 Software Viewer, listed above. The device does not contact the patient, nor does it control any life sustaining devices. A physician, providing ample opportunity for competent human intervention, interprets the images and information being displayed and printed.
PMD Viewer utilizes commercially available computer platforms and operating systems (Microsoft Windows XP/Vista) as does the predicate CSV12 Software Viewer. PMD Viewer does not produce any original medical images. All functions for the review of the PMD device files are the same as reviewing the files on the predicate (parent) device, TCD100M/PMD150, with respect to intended use and indications for use, principles of operation, and technological characteristics and design. It is comparable in key safety and effectiveness features. Studies may be transmitted in DICOM or native TCD100M/PMD150 format, to an integrated magnetooptical drive, or over a network.
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Image /page/2/Picture/0 description: The image shows the logo for the Department of Health & Human Services (HHS). The logo features the department's name encircling a stylized eagle. The eagle is depicted with three stripes forming its body and wings, symbolizing the department's mission to protect the health of all Americans and provide essential human services.
# DEPARTMENT OF HEALTH & HUMAN SERVICES
Public Health Service
Food and Drug Administration 10903 New Hampshire Avenue Document Control Room - WO66-G609 Silver Spring, MD 20993-0002
Mr. Tony Williams VP Quality Assurance/Regulatory Affairs Spentech, Inc. Doing Business as Spencer Technologies 701 16th Avenue SEATTLE WA 98122
OCT = 8 2009
Re: K092204
Trade/Device Name: PMD Viewer Regulation Number: 21 CFR 892.2050 Regulation Name: Picture archiving and communications system Regulatory Class: II Product Code: LLZ Dated: July 16, 2009 Received: July 22, 2009
Dear Mr. Williams:
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. 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.
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); medical device reporting of medical
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Page 2 -
device-related adverse events) (21 CFR 803); 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.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please go to http://www.fda.gov/AboutFDA/CentersOffices/CDRH/CDRHOffices/ucm115809.htm for the Center for Devices and Radiological Health's (CDRH's) Office of Compliance. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to
http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
You may obtain other general information on your responsibilities under the Act from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm.
Sincerely yours,
Janine M. Morris
Janine M. Morris Acting Director, Division of Reproductive, Abdominal, and Radiological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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## 4. INDICATION FOR USE
510(k) Number (if known): K092204
Device Name: PMD Viewer
Indications for Use:
The PMD Viewer Software is intended to provide off-line data viewing, playback, and report generation features of transcranial TCD100M/PMD150 Doppler ultrasound studies on a PC. PMD Viewer may only be operated independently, as a software-only product. PMD Viewer is intended for use by a technologist or physician trained in the use of Doppler ultrasound. PMD Viewer is NOT intended to replace any means of evaluating vital patient physiological processes. No new intended uses are claimed.
Prescription Use X (Part 21 CFR 801 Subpart D)
V
AND/OR
Over-The-Counter Use (21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Arvin M. White
(Division Sign-Off) Division of Reproductive, Abdominal, and Radiological Device
510(k) Number K092204
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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.