G01R 33/446
Multifrequency selective rf pulses
Official title: {Multifrequency selective RF pulses, e.g. multinuclear acquisition mode (spatially selective RF pulses G01R33/4833)}
G01R33/446 (Multifrequency selective rf pulses) appears on 178 US grants and 68 published applications in this corpus.
Search patents in G01R- Granted patents
- 178
- Published applications
- 68
- Assignees
- 83
- Inventors
- 305
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 6 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 5 | 0 |
| 1993 | 10 | 0 |
| 1994 | 13 | 0 |
| 1995 | 7 | 0 |
| 1996 | 12 | 0 |
| 1997 | 6 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 8 | 0 |
| 2002 | 7 | 0 |
| 2003 | 1 | 6 |
| 2004 | 4 | 4 |
| 2005 | 1 | 1 |
| 2006 | 3 | 4 |
| 2007 | 4 | 3 |
| 2008 | 3 | 3 |
| 2009 | 1 | 2 |
| 2010 | 2 | 7 |
| 2011 | 5 | 3 |
| 2012 | 1 | 4 |
| 2013 | 2 | 2 |
| 2014 | 4 | 0 |
| 2015 | 1 | 2 |
| 2016 | 2 | 1 |
| 2017 | 3 | 1 |
| 2018 | 1 | 5 |
| 2019 | 3 | 4 |
| 2020 | 7 | 6 |
| 2021 | 6 | 3 |
| 2022 | 2 | 2 |
| 2023 | 1 | 2 |
| 2024 | 5 | 1 |
| 2025 | 2 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Multi-core integrated magnetic resonance imaging system with distributed, parallel, and scalable architecture15 Sep 2026US 12,736,600 B2Harbin Medical University
- System and method for proton and phosphorus magnetic resonance imaging27 Jan 2026US 12,535,543 B2Mayo Foundation for Medical Education and Research
- System and method for tissue characterization using fast quantitative spin-lock magnetization transfer imaging19 Aug 2025US 12,392,853 B2The Chinese University of Hong Kong
- Optimal pulse power measurement method and system for multinuclear simultaneous integrated magnetic resonance imaging10 Jun 2025US 12,326,490 B1Harbin Medical University
- Magnetic resonance imaging (MRI) system and method integrating multi-nuclide synchronous imaging and spectral imaging19 Nov 2024US 12,146,932 B2Harbin Medical University
- Multi-core Integrated Magnetic Resonance Imaging System with Distributed, Parallel, and Scalable Architecture19 Feb 2026US 2026/0050052 A1Harbin Medical University
- Optimal pulse power measurement method and system for multinuclear simultaneous integrated magnetic resonance imaging5 Jun 2025US 2025/0180682 A1Harbin Medical University
- Magnetic resonance imaging (mri) system and method integrating multi-nuclide synchronous imaging and spectral imaging29 Aug 2024US 2024/0288524 A1Harbin Medical University
- System and method for tissue characterization using fast quantitative spin-lock magnetization transfer imaging27 Jul 2023US 2023/0236273 A1The Chinese University of Hong Kong
- Magnetic resonance imaging apparatus, image generating method and computer-readable non-volatile storage medium storing medical image processing program19 Jan 2023US 2023/0014564 A1Canon Medical Systems Corporation
Most cited
By later US patents
- Method of magnetic resonance imaging165US 6,373,250 B1Ramot University Authority for Applied Research and Industrial Development Ltd. · 2002
- Methods and apparatus for MRI103US 5,365,172 AThe Brigham and Women S Hospital, Inc. · 1994
- Linear combination steady-state free precession MRI69US 6,307,368 B1The Board of Trustees of the Leland Stanford Junior University · 2001
- Apparatus and method for rare echo imaging using k-space spiral coverage45US 5,402,067 AThe Board of Trustees of the Leland Stanford Junior University · 1995
- Continuous fluoroscopic MRI using spiral k-space scanning43US 5,485,086 AThe Board of Trustees of the Leland Stanford Junior University · 1996