DIAGNOSOFT HARP is a stand-alone software package which provides the capability to review, analyze, and report on magnetic resonance (MR) images. HARP can import images from an MR system and display them in a viewing area on the computer screen. Images can be organized and displayed by study and series and organized into three-dimensional and temporal (multi-phase) collections. Temporal sequences can be displayed in a cine mode to facilitate visualization. Tagged MR images can be imported, displayed, and analyzed. Available measurements include displacement, twist, and radial, circumferential, and principle strains. Tools are provided for display of regional motion properties of the heart. A report interface is provided. Measurement tools provide information that can be output in standardized or specialized report formats. This interface makes it possible to quickly and reliably fill out a complete clinical report of an imaging exam. The results of the measurement tools are interpreted by the physician and can be communicated to referring physicians in supporting the determination of a diagnosis.
Device Story
DIAGNOSOFT HARP is a stand-alone software package for Windows OS; imports DICOM images (anatomical, tagged, perfusion, delayed enhancement MRI) from MR scanners. Transforms tagged MRI data into quantitative measurements of heart motion, including displacement, twist, and radial/circumferential/principle strains. Used in clinical settings by physicians to visualize regional motion properties via cine mode and graphical displays. Produces standardized or specialized clinical reports. Output assists physicians in characterizing kinetic, hypokinetic, akinetic, and diskinetic myocardial regions, supporting clinical diagnosis of heart disease.
Clinical Evidence
No clinical data provided. Performance is supported by existing literature on HARP methods and internal verification and validation testing performed by the manufacturer to confirm performance specifications.
Technological Characteristics
Stand-alone software package for Microsoft Windows. Operates on DICOM-compliant MR image data. Features include image display, cine mode visualization, and automated measurement tools for myocardial strain and motion analysis. No specific hardware or material requirements; software-based processing.
Indications for Use
Indicated for use by clinicians to review, analyze, and report on magnetic resonance (MR) images, including anatomical, tagged, perfusion, and delayed enhancement MRI, to support the diagnosis of heart disease by characterizing myocardial motion and regional function.
Regulatory Classification
Identification
A magnetic resonance diagnostic device is intended for general diagnostic use to present images which reflect the spatial distribution and/or magnetic resonance spectra which reflect frequency and distribution of nuclei exhibiting nuclear magnetic resonance. Other physical parameters derived from the images and/or spectra may also be produced. The device includes hydrogen-1 (proton) imaging, sodium-23 imaging, hydrogen-1 spectroscopy, phosphorus-31 spectroscopy, and chemical shift imaging (preserving simultaneous frequency and spatial information).
Special Controls
*Classification.* Class II (special controls). A magnetic resonance imaging disposable kit intended for use with a magnetic resonance diagnostic device only is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 892.9.
Predicate Devices
Cardiac Tagging Techniques/Magnetom Vision and Impact (MR accessory) (K973799)
Submission Summary (Full Text)
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Kol 1368
### JUL 2 8 2006
# 510(k) Summary for the Diagnosoft HARP (per 21 CFR 807.92)
#### 1. SPONSOR
Diagnosoft, Inc. 3461 Kenneth Dr Palo Alto, CA 94303 Telephone: 650-320-9397 Facsimile: 253-663-0205
Primary Contact: Amr A. Awadallah Secondary Contact: Jerry L. Prince
- 2. DATE PREPARED: February 1, 2006
#### 3. DEVICE NAME
Proprietary Name: DIAGNOSOFT HARP Common/Usual Name: HARP Classification Name: System, Image Processing
#### 4. PREDICATE DEVICES
"Cardiac Tagging Techniques/Magnetom Vision and Impact (MR accessory)," 510(k) Number K973799, Siemens Medical Solutions, USA, Inc. Decision (Substantially Equivalent) Date 01/02/1998.
#### ನೆ DEVICE DESCRIPTION
DIAGNOSOFT HARP is a stand-alone software package, designed for the Microsoft Windows operating system, providing the capability to import, display, and analyze magnetic resonance images of the heart. HARP imports DICOM images containing anatomical MRI, tagged MRI, perfusion MRI, or delayed enhancement MRI and is independent of the MR scanner manufacturer. HARP is intended to support clinicians in the diagnosis of heart disease.
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#### 6. INTENDED USE
DIAGNOSOFT HARP is a stand-alone software package which provides the capability to review, and report on magnetic resonance (MR) images. HARP can import images from an MR system and display them in a viewing area on the computer screen. Images can be organized and displayed by study and series and organized into three-dimensional and temporal (multi-phase) collections. Temporal sequences can be displayed in a cine mode to facilitate visualization.
Tagged MR images can be imported, displayed, and analyzed. Available measurements include displacement, twist, and radial, circumferential, and principle strains. Tools are provided for display of regional motion properties of the heart.
A report interface is provided. Measurement tools provide information that can be output in standardized or specialized report formats. This interface makes it possible to quickly and reliably fill out a complete clinical report of an imaging exam. The results of the measurement tools are interpreted by the physician and can be communicated to referring physicians in supporting the determination of a diagnosis.
#### 7. TECHNOLOGICAL CHARACTERISTICS AND SUBSTANTIAL EQUIVALENCE
Diagnosoft claims substantial equivalence to the visual analysis of myocardial tagging based on similarities in intended use, indications for use, principles of operation, technology, and performance. A side-by-side comparison of Siemens myocardial tagging and Diagnosoft HARP is provided in Table 1 below.
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| Vendor | Siemens | Diagnosoft |
|--------------------------------------------------------------------------------------------------------|------------------------------------------|--------------------------|
| Product Name | Cardiac Tagging<br>Techniques<br>K973799 | HARP |
| | | |
| Intended Use | Support diagnosis | Support diagnosis |
| Indications for Use | Measures heart<br>motion | Measures heart<br>motion |
| Reveals myocardial motion | Yes | Yes |
| Assists in characterization of kinetic,<br>hypokinetic, akinetic, and diskinetic<br>myocardial regions | Yes | Yes |
| Permits regional functional analysis | Yes | Yes |
| Quantitative parameters viewed<br>graphically | No | Yes |
| Reports containing visualization of images<br>and quantitative parameters. | No | Yes |
Table 2 Side-by-Side Comparison of Siemens Cardiac Tagging Visual Analysis and Diagnosoft HARP.
#### 8. PERFORMANCE TESTING
A large body of literature exists describing the performance of HARP methods. Additional verification and validation tests were performed by Diagnosoft, Inc. to demonstrate that Diagnosoft HARP fulfills performance specifications.
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Food and Drug Administration 9200 Corporate Blvd. Rockville MD 20850
JUL 2 8 2006
Mr. Amr A. Awadallah President Diagnosoft. Inc. 3461 Kenneth Dr. PALO ALTO CA 94303
Re: K061368
Trade/Device Name: Diagnosoft Harp Regulation Number: 21 CFR 892.1000 Regulation Name: Magnetic resonance diagnostic device Regulatory Class: II Product Code: LNH Dated: April 15, 2006 Received: May 16, 2006
Dear Mr. Awadallah:
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 (Premarket Approval), it may be subject to such 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.
Image /page/3/Picture/9 description: The image is a circular logo with the text "1906-2006" at the top and "Centennial" at the bottom. In the center of the logo are the letters "FDA" in a stylized font. Below the letters are three stars arranged in a horizontal line. The logo appears to be a commemorative emblem for the centennial of the Food and Drug Administration.
Protecting and Promoting Public Health
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Page 2 -
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.
This letter will allow you to begin marketing your device as described in your Section 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 contact the Office of Compliance at one of the following numbers, based on the regulation number at the top of this letter:
| 21 CFR 876.xxx | (Gastroenterology/Renal/Urology) | 240-276-0115 |
|----------------|----------------------------------|--------------|
| 21 CFR 884.xxx | (Obstetrics/Gynecology) | 240-276-0115 |
| 21 CFR 894.xxx | (Radiology) | 240-276-0120 |
| Other | | 240-276-0100 |
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). 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 (240) 276-3150
or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely yours,
Nancy C. Bogdon
Nancy C. Brogdon Director, Division of Reproductive, Abdominal, and Radiological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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## 510(k) Number (if known): ___ Not Yet Assigned Ko 6 1368
Device Name: DIAGNOSOFT HARP
Indications For Use:
DIAGNOSOFT HARP is a stand-alone software package which provides the capability to review, analyze, and report on magnetic resonance (MR) images. HARP can import images from an MR system and display them in a viewing area on the computer screen. Images can be organized and displayed by study and series and organized into three-dimensional and temporal (multi-phase) collections. Temporal sequences can be displayed in a cine mode to facilitate visualization.
Tagged MR images can be imported, displayed, and analyzed. Available measurements include displacement, twist, and radial, circumferential, and principle strains. Tools are provided for display of regional motion properties of the heart.
A report interface is provided. Measurement tools provide information that can be output in standardized or specialized report formats. This interface makes it possible to quickly and reliably fill out a complete clinical report of an imaging exam. The results of the measurement tools are interpreted by the physician and can be communicated to referring physicians in supporting the determination of a diagnosis.
### (PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NECESSARY)
Concurrence of CDRH, Office of Device Evaluation (ODE)
(Division Sign-Off)
Division of Reproductive, Abdominal, and Radiological Devices
| 510(k) Number | K0 61368 |
|---------------|----------|
|---------------|----------|
| Prescription Use | X | OR | Over-the-Counter Use |
|------------------|---|----|----------------------|
|------------------|---|----|----------------------|
(Per 21 CFR 801.109)Diagnosoft Inc., Traditional 510(k) DIAGNOSOFT HARP
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.
