MAGNETIC RESONANCE DIAGNOSTIC DEVICE, MODEL MRP-5000

{0}------------------------------------------------ DEC | | 1998 h984/272 # Attachment 1 510(k) Summary of Safety and Effectiveness {1}------------------------------------------------ # SUBMITTER INFORMATION: 1.0 | 1.1 | Submitter: | Hitachi Medical Systems America | |-----|---------------------------|---------------------------------| | | 1959 Summit Commerce Park | | | | Twinsburg, OH 44087 | | | | PH: 330 425-1313 | | | | FX: 330 425-1410 | | - 1.2 Contact: James Jochen Rogers - 1.3 Date: November 9, 1998 # DEVICE NAME: 2.0 - 2.1 Classification Panel: Radiology - Classification Number: 892.1000 Magnetic Resonance Diagnostic Device 2.2 - System, Nuclear Magnetic Resonance Imaging 2.3 Product Nomenclature: - 2.4 Product Code(s): 90LNH 90MOS (Magnetic Resonance Specialty Coil) - MRP-5000 2.5 Trade/Proprietary Name: - 2.6 PREDICATE DEVICE(s): Hitachi MRP-5000 with Neck/Joint Coil Hitachi MRP-7000/AIRIS with QD C-Spine Cloi # DEVICE DESCRIPTION: 3.0 - 3.1 FUNCTION The MRP-5000 MRI Magnetic Resonance Diagnostic Device is being enhanced by one additional RF Coil (QD C-Spine Coil) to increase the clinical utility of the MRP-5000 in both mobile and stationary configurations. MRP-5000 software did not need to be revised in order to support full functionality of these coils. #### SCIENTIFIC CONCEPTS 3.2 Magnetic Resonance (MR) is based on the fact that certain atomic nuclei have electromagnetic properties which cause them to act as small spinning bar magnets. The most ubiquitous of these nuclei is hydrogen, which makes it the primary nucleus used in current imaging experiments in magnetic resonance. When placed in a magnetic field, there is a slight net orientation or alignment of these atomic nuclei with the magnetic field. The introduction of a short burst of radiofrequency (RF) excitation of wavelength specific to the magnetic field strength and to the atomic nuclei under consideration can cause a reorientation of the proton's magnetization vector. When the RF excitation is removed, the proton relaxes and returns to its original orientation. The rate of relaxation is exponential, and varies with the character of the proton and its adjacent molecular environment. This reorientation process is characterized by two exponential relaxation times called T1 and T2 which can be measured. These relaxation events are accompanied by an RF emission or echo which can be measured and used to develop a representation of these emissions on a three dimensional matrix. Spatial localization is encoded into the echo by varying the RF excitation and by appropriately applying magnetic field gradients in x, y, and z {2}------------------------------------------------ directions, and changing the direction and strength of these gradients. Images depicting the spatial distribution of NMR characteristics of the nuclei under consideration can be constructed by using image processing techniques similar to those used in CT. For magnetic fields up to 1.5T. the RF frequencies commonly used range up to 65MHz. The RF fields have pulse powers from several watts to greater than 10 kilowatts, and repeat at rates from once every few seconds to greater than fifty per second. The time-varying magnetic gradient fields have a typical duration of sub-millisecond to several milliseconds. # PHYSICAL AND PERFORMANCE CHARACTERISTICS 3.3 MR is currently of great interest because it is capable of producing high quality anatomical images without the associated risks of ionizing radiation. In addition, the biological properties that contribute to MR image contrast are different from those responsible for xray image contrast. In x-ray imaging, differences in x-ray attenuation, largely based on differences in electro density are responsible for the contrast observed in x-ray images. In MR imaging, differences in proton density, blood flow, and relaxation times T1 and T2 all may contribute to image contrast. In addition, by varying the duration and spacing of the RF pulses, images may be produced in which the contrast is primarily dependent on T1 relaxation. T2 relaxation, proton density, or a combination of all three. #### 4.0 DEVICE INTENDED USE: The MR system is an imaging device, and is intended to provide the physician with physiological and clinical information, obtained non-invasively and without the use of ionizing radiation. The MR system produces transverse, coronal, sagittal, obligue, and curved cross-sectional images that display the internal structure of the head, body, or extremities. The images produced by the MR system reflect the spatial distribution of protons (hydrogen nuclei) exhibiting magnetic resonance. The NMR properties that determine the image appearance are proton density, spin-lattice relaxation time (T1), spinspin relaxation time (T2), and flow. When interpreted by a trained physician, these images provide information that can be useful in diagnosis determination. - Anatomical Region: Head, Body, Spine, Extremities . - . Nucleus excited: Proton - Diagnostic uses: 2D T1- / T2-weighted imaging - T1, T2, proton density measurements - MR Angiography image processing Imaging capabilities: . 2D Spin Echo (SE); also with rephase 2D Gradient Field Echo (GE); also with rephase (2D GR) 2D Inversion Recovery (IR) 2D Fast Spin Echo (FSE) 2D Dual Slice acquisition (SEDS) 3D Spin Echo (SE) 3D Gradient Field Echo (GE); also with rephasing 3D Steady-state Acquisition with Rephased Gradient Echo (SG) MR Angiography (2D TOF, 3D TOF, half echo, high resolution/ high definition) RF Coil Uniformity Adaptive Image post-processing ACR/NEMA/DICOM 3 compliant # 5.0 DEVICE TECHNOLOGICAL CHARACTERISTICS: Identical to the Predicate Device. {3}------------------------------------------------ Image /page/3/Picture/1 description: The image shows the logo for the Department of Health & Human Services (USA). The logo consists of a circular border with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES (USA)" arranged around the circumference. Inside the circle is a stylized emblem featuring three abstract, curved shapes that resemble human figures or waves. The emblem is black, and the text is also in a dark color, providing a clear contrast against the white background. Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850 DEC 11 199 James Jochen Rogers Manager, Regulatory Affairs Hitachi Medical Systems America, Inc. 1959 Summit Commerce Park Twinsburg, Ohio 44087 Re: K984272 QD C-Spine Coil (Part #MR-QCS-32) Dated: November 3, 1998 Received: November 30, 1998 Regulatory class: II 21 CFR 892.1000/Procode: 90 MOS Dear Mr. Rogers: We have reviewed your Section 510(k) notification of intent to market the device referenced above and we have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to 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). 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 895. A substantially equivalent determination assumes compliance with the Current Good Manufacturing Practice requirements, as set forth in the Quality System Regulation (OS) for Medical Devices: General regulation (2) CFR Part 820) and that, through periodic QS inspections, the Food and Drug Administration (FDA) will verify such assumptions. Failure to comply with the GMP regulation may result in regulatory action. In addition, FDA may publish further announcements concerning your device in the Federal Register. Please note: this response to your premarket notification submission does not affect any obligation you might have under sections 531 through 542 of the Act for devices under the Electronic Product Radiation Control provisions, or other Federal laws or regulations. This letter will allow you to begin marketing your device as described in your 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 and additionally 809.10 for in vitro diagnostic devices), please contact the Office of Compliance at (301) 594-4613. Additionally, for questions on the promotion and advertising of your device, please contact the Office of Compliance at (301) 594-4639. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 807.97). Other general information on your responsibilities under the Act may be obtained from the Division of Small Manufacturers Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its Internet address "http://www.fda.gov/cdrh/dsmaldsmamain.html". Sincerely yours, Lillian Yin, Ph.D. Lillian Yin, Ph.D. Director, Division of Reproductive Abdominal, Ear, Nose and Throat and Radiological Devices Office of Device Evaluation Center for Devices and Radiological Health Enclosure {4}------------------------------------------------ 510(k) Number (if known): K984272 Device Name: Additional RF Coils for MRP-5000 (QD C-Spine) Indications for Use: The QD C-Spine Coil provides imaging of the cervical spine anatomy; dependent upon patient Inc Q & Epil sensitivity may additionally image upper thoracic and lower cranial structures. The MR system is an imaging device, and is intended to provide the physician with physiological and clinical information, obtained non-invasively and without the use of ionizing radiation. The MR system produces transverse, coronal, sagittal, oblique, and curved crosssectional images that display the internal structure of the head, body, or extremities. The images produced by the MR system reflect the spatial distribution of protons (hydrogen nuclei) exhibiting magnetic resonance. The NMR properties that determine the image appearance are proton density, spin-lattion time (T1), spin-spin relaxation time (T2), and flow. When interpreted by a trained physician, these images provide information that can be useful in diagnosis determination. | Anatomical Region: | Head, Body, Spine, Extremities | |-----------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ● | Proton | | Nucleus excited: | 2D T1-/T2-weighted imaging | | ● | T1, T2, proton density measurements | | Diagnostic uses: | MR Angiography | | ● | image processing | | Imaging capabilities: | 2D Spin Echo (SE); also with rephase<br>2D Gradient Field Echo (GE); also with rephase (2D GR)<br>2D Inversion Recovery (IR)<br>2D Fast Spin Echo (FSE)<br>2D Dual Slice acquisition (SEDS)<br>3D Spin Echo (SE)<br>3D Gradient Field Echo (GE); also with rephasing<br>3D Steady-state Acquisition with Rephased Gradient Echo (SG)<br>MR Angiography (2D TOF, 3D TOF, half echo, high resolution/high definition)<br>RF Coil Uniformity<br>Adaptive Image post-processing<br>ACR/NEMA/DICOM 3 compliant | (PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED) Concurrence of CDRH, Office of Device Evaluation (ODE) Prescription Use (Per 21 CFR 801-109 OR (Division Sign-Off) Over-the-Counter Use ***_*** (Division Sign-Off) Division of Reproductive, Abdominal, ENT, and Radiological Devices (Optional Format 1-2-96) included indatasis and en and en and en and en and BEC BE 77 BE 510(k) Number