510(k) · Cleared
ClearedSubtleHD-CT (1.x)
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Subtle Medical, Inc. · QIH Automated Radiological Image Processing Software
Cleared on May 15, 2026 as substantially equivalent to K212074 (Claripi, Inc., 2021) after a 147-day review. Its family tree reaches back 6 generations to 1992.
- Decided
- May 15, 2026
- Review
- 147 days
- Class
- Class II
- Product code
- QIH
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 6 generations to K922470 (1992). No later device cites it as a predicate yet.
- Root · 6 generations backK922470 Ies, Image Enhancement SystemOpen Mri, Inc. · 1992
- 5 generations backK993802 Sharpview Image Enhancement SystemContext Vision AB · 2000
- 4 generations backK024028 Sharp View Image Enhancement SystemContext Vision AB · 2003
- 3 generations backK160852 ZiaZetta Medical Technologies, LLC · 2016
- 2 generations backK183460 ClariCT.AIClaripi, Inc. · 2019
- 1 generation backK212074 ClariCT.AIClaripi, Inc. · 2021
- This deviceK254120 SubtleHD-CT (1.x)Subtle Medical, Inc. · 2026
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −6 | K922470 | Ies, Image Enhancement System | Open Mri, Inc. | 1992 | — |
| −5 | K993802 | Sharpview Image Enhancement System | Context Vision AB | 2000 | — |
| −4 | K024028 | Sharp View Image Enhancement System | Context Vision AB | 2003 | — |
| −3 | K160852 | Zia | Zetta Medical Technologies, LLC | 2016 | — |
| −2 | K183460 | ClariCT.AI | Claripi, Inc. | 2019 | — |
| −1 | K212074 | ClariCT.AI | Claripi, Inc. | 2021 | — |
| 0 (this device) | K254120 | SubtleHD-CT (1.x) | Subtle Medical, Inc. | 2026 | — |
Sources: FDA 510(k) database (decision fields), the FDA summary (predicates and indications), FDA recall and enforcement reports, and MAUDE; processed by 510(k) Report. Verify on FDA.gov · Methodology and accuracy.
Planning a device in QIH? A 510(k) Report weighs predicate choices, recall history and review times for a new device like this one.
Top candidate predicates for a new QIH device
- #1 K213998 cvi42 Auto Imaging Software Applicationscore 23.6 · 7 generations · no Class I recall
- #2 Held for the reportin the report
- #3 Held for the reportin the report
What was it cleared against? (1)
Devices the submitter claimed this one is substantially equivalent to (*), and reference devices cited for a specific test or feature (†), as written in the FDA summary.
| Type | Number | Device | Decided |
|---|---|---|---|
| * | K212074 | ClariCT.AISummary page 5…umber: 892.2050 Product Code: QIH Device Class: Class II Legally Marketed Predicate Primary Predicate #: K212074 Devices: Primary Predicate Name: ClariCT.AI Primary Predicate Legal Ma… | 2021 |
What descends from it?
No later submission names this one as a predicate yet.
Has anything in its family been recalled? (0 Class I)
No FDA recall names this device.
No ancestor or descendant has a Class I recall.
What does this lineage say?
- The line of descent spans 34 years and passes through 5 companies; a new generation was cleared every 4.8 years on median.
- None of the 6 ancestors has a recall.
- 1 other device also cites its predicate K212074.
How does its category compare?
All QIH devicesQIH Automated Radiological Image Processing Software: FDA decisions, review times, recalls and adverse event reports over 20 years. 2026, this device’s year, is highlighted.
FDA decisions per year · QIH
94in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · QIH
150in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · QIH
1so far in 2026, the most since 2007
Class I (0 since 2007) Class II/III not classified
Adverse event reports per year · QIH
4in 2025
MAUDE reports naming product code QIH, not matched to any one device; reports are not rates.
View these four charts as a table
| Year | Decisions | Median 510(k) review, days | Recalls (Class I) | MAUDE reports |
|---|---|---|---|---|
| 2007 | 0 | — | 0 | 0 |
| 2008 | 0 | — | 0 | 0 |
| 2009 | 0 | — | 0 | 0 |
| 2010 | 0 | — | 0 | 0 |
| 2011 | 0 | — | 0 | 0 |
| 2012 | 0 | — | 0 | 0 |
| 2013 | 0 | — | 0 | 0 |
| 2014 | 0 | — | 0 | 0 |
| 2015 | 0 | — | 0 | 0 |
| 2016 | 0 | — | 0 | 0 |
| 2017 | 0 | — | 0 | 0 |
| 2018 | 0 | — | 0 | 0 |
| 2019 | 2 | — | 0 | 0 |
| 2020 | 11 | 145 | 0 | 0 |
| 2021 | 19 | 125 | 0 | 0 |
| 2022 | 25 | 134 | 0 | 0 |
| 2023 | 45 | 151 | 0 | 0 |
| 2024 | 64 | 141 | 0 | 2 |
| 2025 | 94 | 150 | 0 | 4 |
| 2026 | 78 | 130 | 1 | — |
What is it indicated for?
SubtleHD-CT is an AI/ML software intended for the processing and enhancement of CT images regardless of the manufacturer or model of CT scanner.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K254120 · printed Nov 4, 2026
Cite this page
510(k) Report. “K254120: SubtleHD-CT (1.x).” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 4, 2026. https://510kreport.com/device/K254120
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Record history
- FDA decision record loaded Oct 30, 2026
- Summary read Oct 30, 2026 (extraction version 2d9447fa9ea4)
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026