AutoQUANT® Plus applications are intended to enable an automated display, review, and quantification of Nuclear Medicine Cardiology medical images and datasets. AutoQUANT® Plus may be used in multiple settings including the hospital, clinic, doctors office, or remotely via dial up. The results provided should be reviewed by qualified healthcare professionals (e.g., radiologists, cardiologists, or general nuclear medicine physicians) trained in the use of medical imaging devices.
Device Story
AutoQUANT® Plus is a software suite for processing/reviewing Cardiac SPECT and PET datasets. Inputs include cardiac SPECT/PET images, ECG-gated data, and CT/CTA anatomical datasets. The software performs automated LV extraction, 3D contour mapping, and quantification of perfusion/viability (e.g., TPD, ejection fraction, volumes). Algorithms include stress-rest registration, motion-frozen image warping, and heuristic rules for prone-supine artifact elimination. QBS module provides automated segmentation of gated blood pool SPECT. Fusion module enables multimodality alignment (SPECT/CT, PET/CT). Used in hospitals/clinics/remote settings by physicians to assess myocardial defects, heart volume, and hibernating myocardium. Output is visualized as polar maps, 3D surfaces, and quantitative metrics, aiding clinical decision-making regarding cardiac functionality and viability.
Clinical Evidence
Bench testing only. The simplified algorithm for myocardial perfusion quantification was validated in a large group of patients, demonstrating equivalent diagnostic performance to previous methods using simplified normal limits.
Technological Characteristics
Software-based application for nuclear medicine image processing. Features include automated segmentation, 3D contouring, and multimodality fusion (SPECT/CT/CTA, PET/CT/CTA). Connectivity includes remote access via dial-up. Algorithms include rule-based heuristics for artifact removal and motion-correction warping. Operates on standard clinical workstations.
Indications for Use
Indicated for patients undergoing Nuclear Medicine Cardiology imaging (SPECT/PET). Used by radiologists, cardiologists, or nuclear medicine physicians for automated display, review, and quantification of cardiac datasets.
Regulatory Classification
Identification
An emission computed tomography system is a device intended to detect the location and distribution of gamma ray- and positron-emitting radionuclides in the body and produce cross-sectional images through computer reconstruction of the data. This generic type of device may include signal analysis and display equipment, patient and equipment supports, radionuclide anatomical markers, component parts, and accessories.
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Image /page/0/Picture/0 description: The image shows a handwritten string of alphanumeric characters. The string appears to read "K060020". The characters are written in a bold, somewhat messy style, with varying stroke thicknesses. The background is plain white.
Section B. Summary of Safety & Effectiveness CONFIDENTIAL
# JAN 2 0 2006
## 510(k) SUMMARY SAFETY AND EFFECTIVENESS
| A. | Submitted By:<br>ADAC Laboratories<br>540 Alder Dr.<br>Milpitas, CA 95035 | Contact: Coleman A. Coleman<br>Tel: (408) 468-3051<br>Fax: (408) 468-3050 |
|----|---------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------|
| B. | Device Trade Name:<br>AutoQUANT® Plus | |
| | Common Name:<br>Classification Name:<br>Device Class:<br>Product Code: | Nuclear Medicine Software Application<br>Emission Computed Tomography System<br>21 CFR 892.1200, Class II<br>90 KPS |
| C. | Date prepared: | December 16, 2004 |
| D. | Predicate Device (s): | |
| | Manufacturer<br>ADAC Laboratories | Product Name<br>AutoQUANT® Plus<br>510(k) No.<br>K040326 |
#### E. Intended Use:
AutoQUANT® Plus applications are intended to enable an automated display, review, and quantification of Nuclear Medicine Cardiology medical images and datasets. AutoQUANT® Plus may be used in multiple settings including the hospital, clinic, doctors office, or remotely via dial up. The results provided should be reviewed by qualified healthcare professionals (e.g., radiologists, cardiologists, or general nuclear medicine physicians) trained in the use of medical imaging devices.
#### F. Device Description:
AutoQUANT® Plus (K040326) was composed of the following applications: AutoQUANT® (K040326) [AutoOUANT integrates 2 functionalities, Quantitative Perfusion SPECT (QPS) and Quantitative Gated SPECT (QGS) into a single application for LV (Left Ventricle) extraction and analysis], Quantitative Blood Pool SPECT (QBS) and optionally QARG (for reporting purposes).
The modified AutoQUANT® Plus is a suite of applications for the processing and review of Cardiac SPECT and PET datasets. AutoQUANT® Plus is composed of the following applications: AutoQUANT® (K040326) [AutoQUANT integrates 2 functionalities, Quantitative Perfusion SPECT (QPS) and Quantitative Gated SPECT (QGS) into a single application for LV (Left Ventricle) extraction and analysis). AutoQUANT Plus will be marketed as AutoQUANT NM, which combines the following two separate sets of
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functionality: AutoQUANT - optimized for SPECT studies and OPET - optimized for PET studies. Both sets of functionality offer a comprehensive application suite that includes QGS (Quantitative Gated SPECT) and OPS (Quantitative Perfusion SPECT) applications. This allows automatic processing and review of quantitative and qualitative information generated by nuclear medicine studies. QPET also includes viability quantification and two additional databases (rubidium and ammonia) for processing PET studies. AutoQUANT NM can also be purchases separately as AutoOUANT (for SPECT study data) or QPET (for PET study data). Purchasable Options consist of Quantitative Blood Pool SPECT (QBS), QARG (for reporting purposes), Fusion (SPECT/CT/CTA and/or PET/CT/CTA, and Prone-Supine (Prone+) for SPECT studies.
AutoQUANT® is a software application designed to enable an automated, comprehensive review and quantification of Cardiac SPECT data. AutoQUANT® integrates 2 functionalities, Quantitative Perfusion SPECT (OPS) and Quantitative Gated SPECT (QGS) into a single application for LV (Left Ventricle) extraction and analysis. AutoQUANT® provides a tool to review and quantify all types of Cardiac SPECT data sets (perfusion and/or gated) to determine the location, orientation, and anatomical extent of the left ventricle of the heart, to construct 3D contour maps of the heart, and to calculate the heart volume (for the left ventricular wall), the lung/heart ratio, and transient ischemic dilation (TID). Physicians use this information to assess the anatomical and physiological functionality of the heart and analyze the presence of myocardial defects through comprehensive imaging modalities. A new Phase toggle on the OGS page gives access to phase information for gated datasets. Stress-Rest Registration is a direct method for detecting changes between stress and rest images. It is a practical and fully automatic algorithm for quantification of stress-induced changed from paired stress and rest scans and does not use protocol-specific databases. A new technique to create cardiac "motionfrozen" perfusion or viability images, by warping ECG-gated images to the end-diastolic position has been added. Such "motion-frozen" perfusion and viability images have improved resolution and contrast by removing blurring effect caused by cardiac motion. Prone-supine quantification allows quantification of perfusion on prone images as well as combined quantification of prone/supine datasets by applying heuristic rules, which allow automatic elimination of image artifacts based on the relative defect locations on prone and supine images. The new shape index parameter defines 3D left ventricular (LV) geometry derived from LV contours in end systolic and end diastolic phases.
The AutoQUANT application provides Normal Files database for stress, rest, and gender criteria for Dual Isotope and Mibi (Te-Sestamibi): The new version of QPS includes the simplified algorithm for the quantification of myocardial perfusion, using normal limits created from studies of low-likelihood normal patients only. The new algorithm has been validated in a large group of patients demonstrating equivalent diagnostic performance despite the use of simplified normal limits. In addition, to Dual Isotope and Mibi Mibi using the new simplified algorithm, the following additional databases are being provided Vantage MibiMibi, Thallium Stress/Rest, Astonish ½ Time Dual, and Astonish ½ Time Mibi. Optional Normals databases offered are Rubidium for PET, Ammonia for PET. QPS provides the ability for User Generated Normal Files using the simplified method. The new version of QPS also includes a new variable, Total Perfusion Deficit (TPD), which combines defect extent and severity values. For backward compatibility reasons, the old QPS perfusion quantification method, which displays individual defect extent and
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severity values, can be accessed by checking off PFQ option in the QPS Application Defaults. All the functional QGS values (ejection fraction, LV volumes etc) and contour definitions are the same as before.
Quantitative Blood Pool SPECT (QBS) is an optional application. QBS is an interactive standalone software application for the automatic segmentation and quantification of gated short axis blood pool (red blood cells, RBC) SPECT. The application can be used for automatic generation of left and right ventricular endocardial surfaces and valve planes from three-dimensional (3D) gated short axis blood pool images; automatic calculation of left and right ventricular volumes and ejection fractions; calculation and display of polar maps representing wall motion and parametric values (FFH amplitude and phase); twodimensional (2D) image display using standard American College of Cardiology (ACC) cardiac SPECT conventions; and 3D image display. It also provides the following functionalities: ability to combine isosurfaces extracted from the data with the calculated endocardial surfaces in various ways (endocardial borders displayed as wireframes, shaded surfaces, both, or parametric); ability to man parametric values (First Fourier Harmonic (FFH) amplitude and phase) on the surfaces; ability to display parametric images (FFH amplitude and phase) for gated planar, gated raw projections and gated short axis images; ability to display cine loops of the original images; ability to generate count-based quantitative values using the automatically- and semi automatically-computed surfaces as ROIs and user-selectable thresholds; ability to generate and display phase histograms for FFH phase images and to display the mean and standard deviation of the peaks corresponding to atrial and ventricular voxels. After ventricular segmentation, a phase histogram for each ventricle is also computed and displayed; and ability to display normalized images for all gated images (i.e., images that do not exhibit count drop-off caused by arrhythmia). In addition, QBS supports manual identification of the leftventricular (LV) region, to separate it from the right ventricle (RV) in cases where the automatic algorithm fails or returns unsatisfactory results; ability to generate filling rates from interpolated time-volume curves; and the ability to rotate, zoom, and cine surfaces.
The ability to load and display PET, CT, CTA datasets in AutoQUANT® Plus have been added as an option. Qualitative displays are now provided functional PET data and CT/CTA anatomical datasets. In addition, nuclear image fusion package has been added for both SPECT/CT and PET/CT hybrid applications. A SPECT/CT fusion package including SPECT/CT/CTA Fusion Page, that allows for display of segmented and labeled coronary vessels with perfusion SPECT 3D data. A PET/CT fusion package including PET/CT/CTA Fusion Page, that allows for display of segmented and labeled coronary vessels with PET 3D data. Functionality includes orthogonal planes using alpha blending. roving window and synchronized cursor. It allows users to perform quality control of SPECT/CT/CTA or PET/CT/CTA alignment and has generic multimodality fusion capabilities. This feature provides display of fused images in a visual format. Additionally, included for PET analysis is the Hibernating Myocardium Assessment (mismatch and viability); This module allows quantitative assessment of "hibernating myocardium" by quantification of changes between PET perfusion and viability images in hypo-perfused area. Scar and Mismatch parameters are reported as a percentage of the Left Ventricle and are displayed in polar coordinates or a 3D surface display.
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Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
JAN 2 0 2006
ADAC Laboratories, Inc. % Mr. Morten S. Christensen Staff Engineer & FDA Office Coordinator Medical Device Services Underwriters Laboratories, Inc. 455 East Trimble Road SAN JOSE CA 95131
Re: K060020
Trade/Device Name: AutoQUANT® Plus Regulation Number: 21 CFR 892.1200 Regulation Name: Emission computed tomography system Regulatory Class: II Product Code: KPS Dated: January 3, 2006 Received: January 4, 2006
Dear Mr. Christensen:
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.
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 (OS) regulation (21 CFR Part 820): and if applicable, the clectronic product radiation control provisions (Sections 531-542 of the Act): 21 CFR 1000-1050.
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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.xxxx | (Gastroenterology/Renal/Urology) | 240-276-0115 |
|-----------------|----------------------------------|--------------|
| 21 CFR 884.xxxx | (Obstetrics/Gynecology) | 240-276-0115 |
| 21 CFR 892.xxxx | (Radiology) | 240-276-0120 |
| Other | | 240-276-0100 |
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 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 (301) 443-6597 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely yours.
Nancy C. Higdon
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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### INDICATIONS FOR USE STATEMENT
510 (*k*) NUMBER (IF KNOWN):
510 (k) NUMBER (IF KNOWN): K060020
AutoQUANT® Plus DEVICE NAME:
SPONSOR NAME:
ADAC Laboratories
### INDICATIONS FOR USE:
AutoQUANT® Plus applications are intended to enable an automated display, review, · and quantification of Nuclear Medicine Cardiology medical images and datasets. AutoQUANT® Plus may be used in multiple settings including the hospital, clinic, doctors office, or remotely via dial up. The results provided should be reviewed by qualified healthcare professionals (e.g., radiologists, cardiologists, or general nuclear medicine physicians) trained in the use of medical imaging devices.
### (PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED.)
| Concurrence of CDRH, Office of Device Evaluation (ODE) |
|--------------------------------------------------------|
|--------------------------------------------------------|
| Prescription Use<br>(Per 21 CFR 801.109) | <div style="display:inline-block; vertical-align:top;">✓</div> |
|------------------------------------------|----------------------------------------------------------------|
|------------------------------------------|----------------------------------------------------------------|
OR
| | <div>(Division Sign-Off)</div> <div>Division of Reproductive, Abdominal,</div> <div>and Radiological Devices</div> |
|--|--------------------------------------------------------------------------------------------------------------------|
|--|--------------------------------------------------------------------------------------------------------------------|
| 510(k) Number | K060020 |
|---------------|---------|
|---------------|---------|
| Over-The-Counter-Use<br>(Optional Format 1-2-96) | |
|--------------------------------------------------|--|
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Learn the FDA Browser
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.