510(k) · Cleared
ClearedEMMA 1.5T MRI System
Data to Oct 25, 2026 (FDA decisions) Oct 12, 2026 (recalls) Sep 30, 2026 (MAUDE) refreshed weekly
Time Medical Limited · LNH System, Nuclear Magnetic Resonance Imaging
Cleared on Feb 22, 2019 as substantially equivalent to K161567 (GE Healthcare, 2016) after a 58-day review. Its family tree reaches back 16 generations to 1997. 5 of the 35 devices in its family, counting itself, have a Class I recall. 1 later device descends from it.
- Decided
- Feb 22, 2019
- Review
- 58 days
- Class
- Class II
- Product code
- LNH
- Recalls
- None
- Predicates
- 1
Its longest line of descent runs back 16 generations to K971684 (1997). 33 ancestors in all, the oldest K962061 (1996). 1 later device descends from it, 1 citing it directly. 5 of the 35 devices in this family, counting this one, have a Class I recall.
- Root · 16 generations backK971684 Magnetom Project 047 System (Numaris 3.5 Software)Siemens Medical Solutions USA, Inc. · 1997 · Recalled
- 12 generations between
- 3 generations backK143345 SIGNA PioneerGe Healthcare Japan Corporation · 2015 · Recalled
- 2 generations backK160621 SIGNAPioneerGE Healthcare · 2016 · Recalled
- 1 generation backK161567 SIGNA VoyagerGE Healthcare · 2016 · Recalled
- This deviceK183621 EMMA 1.5T MRI SystemTime Medical Limited · 2019
- Descendant · cites it directly · 0 of its ownK222259 NEONA 1.5T MRI SystemTime Medical Limited · 2023
Show all 16 generations
- Root · 16 generations backK971684 Magnetom Project 047 System (Numaris 3.5 Software)Siemens Medical Solutions USA, Inc. · 1997 · Recalled
- 15 generations backK032428 Magnetom Avanto MR SystemSiemens Medical Solutions USA, Inc. · 2003 · Recalled
- 14 generations backK041112 Magnetom Espree SystemSiemens Medical Solutions USA, Inc. · 2004 · Recalled
- 13 generations backK052164 Magnetom Systems with Software Syngo MR 2006ASiemens Medical Solutions USA, Inc. · 2005
- 12 generations backK062454 Magnetom Systems - I-Class and T-Class ReleasesSiemens Medi Cal Solutions, Inc. · 2006
- 11 generations backK072237 Magnetom VerioSiemens Medical Solutions USA, Inc. · 2007 · Recalled (Class I)
- 10 generations backK081028 Signa 3.0T MR750 SystemGe Medical Systems, LLC · 2008 · Recalled
- 9 generations backK083147 Discovery MR450Ge Medical Systems, LLC · 2008 · Recalled
- 8 generations backK091536 Optima MR450WGe Medical Systems, LLC · 2009 · Recalled
- 7 generations backK113490 Optima MR450WGe Medical Systems, LLC · 2012 · Recalled
- 6 generations backK123522 Optima MR450WGe Healthcare (Ge Medical Systems, LLC) · 2013 · Recalled
- 5 generations backK132376 Discovery MR750 3.0T, Discovery MR450 1.5T, Discovery MR750W 3.0T…Ge Healthcare (Ge Medical Systems, LLC) · 2013 · Recalled
- 4 generations backK142085 Discovery MR750 3.0T ,Discovery MR450 1.5T, Discovery MR750…Ge Medical Systems, LLC · 2014 · Recalled
- 3 generations backK143345 SIGNA PioneerGe Healthcare Japan Corporation · 2015 · Recalled
- 2 generations backK160621 SIGNAPioneerGE Healthcare · 2016 · Recalled
- 1 generation backK161567 SIGNA VoyagerGE Healthcare · 2016 · Recalled
- This deviceK183621 EMMA 1.5T MRI SystemTime Medical Limited · 2019
Class I recalls in this family
Most influential descendants
Showing 1 of 1 · See all- K222259NEONA 1.5T MRI SystemTime Medical Limited · 2023 · cites it directly0descendants
View FIG. 1 as a table
Line of descent and top descendants
| Generation | Number | Device | Applicant | Decided | Recalls |
|---|---|---|---|---|---|
| −16 | K971684 | Magnetom Project 047 System (Numaris 3.5 Software) | Siemens Medical Solutions USA, Inc. | 1997 | 4 |
| −15 | K032428 | Magnetom Avanto MR System | Siemens Medical Solutions USA, Inc. | 2003 | 4 |
| −14 | K041112 | Magnetom Espree System | Siemens Medical Solutions USA, Inc. | 2004 | 4 |
| −13 | K052164 | Magnetom Systems with Software Syngo MR 2006A | Siemens Medical Solutions USA, Inc. | 2005 | — |
| −12 | K062454 | Magnetom Systems - I-Class and T-Class Releases | Siemens Medi Cal Solutions, Inc. | 2006 | — |
| −11 | K072237 | Magnetom Verio | Siemens Medical Solutions USA, Inc. | 2007 | Class I |
| −10 | K081028 | Signa 3.0T MR750 System | Ge Medical Systems, LLC | 2008 | 11 |
| −9 | K083147 | Discovery MR450 | Ge Medical Systems, LLC | 2008 | 10 |
| −8 | K091536 | Optima MR450W | Ge Medical Systems, LLC | 2009 | 8 |
| −7 | K113490 | Optima MR450W | Ge Medical Systems, LLC | 2012 | 3 |
| −6 | K123522 | Optima MR450W | Ge Healthcare (Ge Medical Systems, LLC) | 2013 | 1 |
| −5 | K132376 | Discovery MR750 3.0T, Discovery MR450 1.5T, Discovery MR750W 3.0T, Optima… | Ge Healthcare (Ge Medical Systems, LLC) | 2013 | 15 |
| −4 | K142085 | Discovery MR750 3.0T ,Discovery MR450 1.5T, Discovery MR750 3.0T,Optima MR450W… | Ge Medical Systems, LLC | 2014 | 27 |
| −3 | K143345 | SIGNA Pioneer | Ge Healthcare Japan Corporation | 2015 | 6 |
| −2 | K160621 | SIGNAPioneer | GE Healthcare | 2016 | 5 |
| −1 | K161567 | SIGNA Voyager | GE Healthcare | 2016 | 4 |
| 0 (this device) | K183621 | EMMA 1.5T MRI System | Time Medical Limited | 2019 | — |
| +1 | K222259 | NEONA 1.5T MRI System | Time Medical Limited | 2023 | — |
Other ancestors by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 1996 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2001 | 4 | 1 |
| 2002 | 2 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 1 |
| 2005 | 3 | 0 |
| 2011 | 1 | 0 |
| 2013 | 1 | 0 |
Descendants by year cleared
| Year cleared | Devices | With a Class I recall |
|---|---|---|
| 2023 | 1 | 0 |
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.
5 devices in this family have a Class I recall. 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 LNH device
- #1 K213693 MAGNETOM Vida with syngo MR XA50Ascore 23.0 · 18 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 |
|---|---|---|---|
| * | K161567 | SIGNA VoyagerSummary page 4…to Predicate Device: Comparison Element Filing Device: Predicate Device: 510(k) Number N/A K161567 Model 15000-01 SIGNA Voyager 1.5T Device Name EMMA 1.5T MRI Syste… | 2016 |
What descends from it? (1)
1 later device cites it directly; ranked here by how many devices descend from each in turn.
| Number | Device | Decided | Descendants |
|---|---|---|---|
| K222259 | NEONA 1.5T MRI System | 2023 | 0 |
Has anything in its family been recalled? (5 Class I)
No FDA recall names this device.
Relatives with a Class I recall
Class I is FDA’s most serious recall class. A recall in the family tree is context for this device, not evidence about it.
- K072237Magnetom VerioSiemens Medical Solutions USA, Inc. · 2007 · 7 generations back · ◆ on the line of descent in FIG. 11 Class I recall
- K041476GE Signa Excite 1.5T MR System, GE Signa Excite 3.0T MR SystemGe Medical Systems, LLC · 2004 · 8 generations back · ◆ in the 2004 ancestors bar of FIG. 11 Class I recall
- K030874GE 3.0T Signa Infinity Twinspeed with Excite MR SystemGeneral Electric Co. · 2003 · 9 generations back · ◆ in the 2003 ancestors bar of FIG. 11 Class I recall
- K013636Signa Infinity MR System with Excite TechnologyGE Medical Systems · 2002 · 9 generations back · ◆ in the 2002 ancestors bar of FIG. 11 Class I recall
- K0122001.5T Infinity Twinspeed MR SystemGE Medical Systems · 2001 · 10 generations back · ◆ in the 2001 ancestors bar of FIG. 11 Class I recall
What does this lineage say?
- The line of descent spans 22 years and passes through 7 companies; a new generation was cleared every 10 months on median.
- 26 of the 33 ancestors have a recall of any class; 5 have a Class I recall.
- Of its descendants, K222259 (Time Medical Limited, 2023) has gone furthest, with 0 descendants of its own.
- 1 other device also cites its predicate K161567.
How does its category compare?
All LNH devicesLNH System, Nuclear Magnetic Resonance Imaging: FDA decisions, review times, recalls and adverse event reports over 20 years. 2019, this device’s year, is highlighted.
FDA decisions per year · LNH
26in 2025
2026 to Oct 25, outlined.
Median 510(k) review, days · LNH
122in 2025
Receipt to decision; years with fewer than 3 clearances left blank.
Recalls per year · LNH
8in 2025
Class I (8 since 2007) Class II/III not classified
Adverse event reports per year · LNH
1,263in 2025
MAUDE reports naming product code LNH, 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 | 12 | 35 | 25 | 114 |
| 2008 | 19 | 53 | 12 | 167 |
| 2009 | 17 | 70 | 7 | 194 |
| 2010 | 12 | 94 | 17 | 165 |
| 2011 | 16 | 81 | 11 | 182 |
| 2012 | 22 | 89 | 5 | 170 |
| 2013 | 19 | 108 | 2 | 107 |
| 2014 | 17 | 108 | 13 | 119 |
| 2015 | 19 | 140 | 12 (2) | 113 |
| 2016 | 20 | 108 | 1 | 135 |
| 2017 | 18 | 98 | 0 | 121 |
| 2018 | 29 | 128 | 71 | 158 |
| 2019 | 26 | 62 | 5 | 158 |
| 2020 | 32 | 121 | 4 | 98 |
| 2021 | 27 | 87 | 41 | 84 |
| 2022 | 30 | 74 | 13 | 138 |
| 2023 | 30 | 124 | 10 (1) | 159 |
| 2024 | 26 | 104 | 4 | 281 |
| 2025 | 26 | 122 | 8 (5) | 1,263 |
| 2026 | 24 | 126 | 43 | — |
What is it indicated for?
The EMMA 1.5T MRI System is indicated for use as a magnetic resonance diagnostic device (MRDD) which produces transverse, sagittal, coronal and oblique cross-sectional images, and those display the internal structure and/or function of the head, body, or extremities. Depending on the region of interest, contrast agents may be used. These images when interpreted by trained physician yield information that may assist medical diagnosis.
Indications for use as stated in the FDA summary.
https://510kreport.com/device/K183621 · printed Nov 6, 2026
Cite this page
510(k) Report. “K183621: EMMA 1.5T MRI System.” Lineage record from FDA 510(k) data and the FDA summary. Updated Nov 3, 2026. Accessed Nov 6, 2026. https://510kreport.com/device/K183621
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Record history
- FDA decision record loaded May 2, 2026
- Summary read Oct 13, 2026 (extraction version 9eaa42aa01ed)
- Lineage and recalls computed Nov 3, 2026
- Page last updated Nov 3, 2026