ECHELON C MRI SYSTEM

K083533 · Hitachi Medical Systems America, Inc. · LNH · Feb 17, 2009 · Radiology

Device Facts

• Record ID: K083533
• Device Name: ECHELON C MRI SYSTEM
• Applicant: Hitachi Medical Systems America, Inc.
• Product Code: LNH · Radiology
• Decision Date: Feb 17, 2009
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 892.1000
• Device Class: Class 2

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, spinlattice relaxation 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.

Device Story

ECHELON C is a 1.5 Tesla superconductive short bore MRI system. It utilizes magnetic resonance of hydrogen nuclei to generate cross-sectional images (transverse, coronal, sagittal, oblique, curved). Input signals are RF echoes measured following RF excitation and magnetic field gradient application. System reconstructs images based on proton density, T1, T2, and flow characteristics. Operated by trained clinicians in clinical settings. Output images are interpreted by physicians to assist in diagnosis. System provides anatomical visualization without ionizing radiation.

Clinical Evidence

No clinical data provided. Substantial equivalence is based on identical technological characteristics and intended use to the predicate device.

Technological Characteristics

1.5 Tesla superconductive short bore gantry design. Operates via magnetic resonance of protons. Employs RF excitation and magnetic field gradients for spatial encoding. Image reconstruction uses processing techniques similar to computed tomography. Hardware and software are identical to the predicate device.

Indications for Use

Indicated for non-invasive diagnostic imaging of the head, body, spine, and extremities in patients requiring T1, T2, proton density weighted imaging, diffusion weighted imaging, MR angiography, or spectroscopy. Contraindications not specified.

Regulatory Classification

Identification

A magnetic resonance diagnostic device is intended for general diagnostic use to present images which reflect the spatial distribution and/or magnetic resonance spectra which reflect frequency and distribution of nuclei exhibiting nuclear magnetic resonance. Other physical parameters derived from the images and/or spectra may also be produced. The device includes hydrogen-1 (proton) imaging, sodium-23 imaging, hydrogen-1 spectroscopy, phosphorus-31 spectroscopy, and chemical shift imaging (preserving simultaneous frequency and spatial information).

Special Controls

*Classification.* Class II (special controls). A magnetic resonance imaging disposable kit intended for use with a magnetic resonance diagnostic device only is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 892.9.

Predicate Devices

• ECHELON Magnetic Resonance Imaging System (K052172)

Submission Summary (Full Text)

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K083533

# Submitter Information

| Submitter: | Hitachi Medical Systems America, Inc.<br>1959 Summit Commerce Park<br>Twinsburg, Ohio 44087-2371<br>ph: [phone]<br>fax: [phone] | FEB 1 7 2005 |
|------------|-----------------------------------------------------------------------------------------------------------------------------------------------|--------------|
| Contact: | Douglas J. Thistlethwaite | |
| Date: | November 24, 2008 | |

## Device Name

| Classification Name: | System, Nuclear Magnetic Resonance Imaging |
|-------------------------|--------------------------------------------------------|
| Classification Number: | 90LNH |
| Trade/Proprietary Name: | ECHELON C Magnetic Resonance Imaging System |
| Predicate Device(s): | ECHELON Magnetic Resonance Imaging System<br>(K052172) |

# 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, spinlattice relaxation 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.

# Device Description

### Function

ECHELON C Magnetic Resonance Imaging System that utilizes a 1.5 Tesla superconductive short bore gantry design. The design was based on the ECHELON MRI system.

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### Scientific Concepts

Magnetic Resonance Imaging (MRI) is based on the fact that certain atomic nuclei have electromagnetic properties that cause them to act as small spinning bar magnets. The most ubiquitous of these nuclei is hydrogen, which makes it the primary nuclei currently used in magnetic resonance imaging. When placed in a static magnetic field, these nuclei assume a net orientation or alignment with the magnetic field, referred to as a net magnetization vector. The introduction of a short burst of radiofrequency (RF) excitation of a wavelength specific to the magnetic field strength and to the atomic nuclei under consideration can cause a re-orientation of the net magnetization vector. When the RF excitation is removed, the protons relax and return to their original vector. The rate of relaxation is exponential and varies with the character of the proton and its adjacent molecular environment. This re-orientation process is characterized by two exponential relaxation times, called T1 and T2.

A RF emission or echo that can be measured accompanies these relaxation events. The emissions are used to develop a representation of the relaxation events in a three dimensional matrix. Spatial localization is encoded into the echoes by varying the RF excitation, applying appropriate magnetic field gradients in the x, y, and z directions, and changing the direction and strength of these gradients. Images depicting the spatial distribution of the NMR characteristics can be reconstructed by using image processing techniques similar to those used in computed tomography.

### Physical and Performance Characteristics

MRI is capable of producing high quality anatomical images without the associated risks of ionizing radiation. The biological properties that contribute to MR image contrast are different from those responsible for x-ray image contrast. In MR imaging, difference in proton density, blood flow, and T1 and T2 relaxation times can all contribute to image contrast. By varying the pulse sequence characteristics, the resulting images can emphasize T1, T2, proton density, or the molecular diffusion of water or other proton containing molecules.

# Device Technological Characteristics

The technological characteristics of this device are identical to the primary predicate device. The control and image processing hardware and the base elements of the system software are identical to the predicate device.

See Section J - Substantial Equivalence Discussion.

## Conclusions

It is the opinion of Hitachi Medical Systems America, Inc. that the ECHELON C Magnetic Resonance Imaging System is substantially equivalent to the listed predicate device. The intended use is identical to the listed predicate device.

## Attachment

| ATTACHMENT | POSITION |
|------------------------------------------------|----------|
| Declaration of Conformity with Design Controls | 1 |

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Image /page/2/Picture/0 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular seal with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" around the perimeter. Inside the circle is a stylized image of an eagle with its wings spread, symbolizing the department's mission to protect the health of all Americans.

### DEPARTMENT OF HEALTH & HUMAN SERVICES

Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850 . .

FEB 1 7 2009

Mr. Doug Thistlethwaite Manager, Regulatory Affairs Hitachi Medical Systems America, Inc. 1959 Summit Commerce Park TWINSBURG OH 44087

Re: K083533

Trade/Device Name: ECHELON C MRI System Regulation Number: 21 CFR 892.1000 Regulation Name: Magnetic resonance diagnostic device Regulatory Class: II Product Code: LNH Dated: November 24, 2008 Received: November 28, 2008

#### Dear Mr. Thistlethwaite:

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 Cesthetic act (Art) 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 (PMA), 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.

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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 (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.

This letter will allow you to begin marketing your device as described in your Section 510(k) premarket notification. The FDA finding os 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.xxx | (Gastroenterology/Renal/Urology) | [phone] |
|----------------|----------------------------------|----------------|
| 21 CFR 884.xxx | (Obstetrics/Gynecology) | [phone] |
| 21 CFR 892.xxx | (Radiology) | [phone] |
| Other | | [phone] |

Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). For questions regarding postmarket surveillance, please contact CDRH's Office of Surveillance and Biometrics' (OSB's) Division of Postmarket Surveillance at 240-276-3474. For questions regarding the reporting of device adverse events (Medical Device Reporting (MDR)), please contact the Division of Surveillance Systems at 240-276-3464. You may obtain other general information on your responsibilities under the Act from the Division of Small Manufactures, International and Consumer Assistance at its toll-free number [phone] or [phone] or at its Internet address http://www.fda.gov/cdrh/industry.suppor/index.html.

Sincerely yours,

Janine M. Morris

anine M. Morris Acting Director, Division of Reproductive, Abdominal, and Radiological Devices Office of Device Evaluation Center for Devices and Radiological Health

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510(k) Number (if known): Co83533 ECHELON C MRI System Device Name:

#### Indications for Use:

The ECHELON C MRI 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 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-latticë relaxation 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 |
|--------------------|-------------------------------------------------------------------------------------------------------------------------------------------|
| Nucleus excited: | Proton |
| Diagnostic uses: | T1, T2, proton density weighted imaging<br>Diffusion weighted imaging<br>MR Angiography<br>Image processing<br>Spectroscopy<br>Whole Body |

Prescription Use × AND/OR

Over-the-Counter Use

(Part 21 CFR 801 Subpart D)

(21 CFR 801 Subpart C)

(PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)

Concurrence of CDRH, Office of Device Evaluation (ODE).

Hules Peum

(Division Sign-Off) Division of Repremetive, Abdominal, and Radiological Device

Radiological Devices
510(k) Number K083533