Philips MR7700 3.0T MRI System: Room Requirements and Layout Guide
This document provides essential technical requirements for selecting and preparing a suitable room for the installation of the Philips MR7700 3.0T MRI equipment. It is intended for users and contractors involved in the installation process.
General Room Requirements
Key considerations for room selection and preparation include:
- A dedicated power line from a transformer (TP / TRS).
- Proximity to elevators, electrical rooms, roadways, and metro lines should be considered.
- Floor load-bearing capacity must be verified, with limitations on the amount of metal in the floor.
- Areas with magnetic field induction of 0.5 mT and above, extending beyond the procedure room, must be accounted for.
- The total power requirement for the facility may be higher due to the UPS system, accommodating peak currents.
- The route for the quench pipe and helium exhaust zone must be considered.
Recommended Room Dimensions and Layout
The following dimensions are recommended for the different areas:
- Procedure Room: 7300 x 6500 mm
- Operator Room: 3000 x 6500 mm
- Technical Room: 3000 x 6500 mm
- Recommended ceiling height: 3200 mm from floor to ceiling slab.
Rooms with smaller dimensions may present mechanical limitations and operational challenges.
Layout Diagram
The diagram below illustrates a typical equipment configuration and serves as a general guide for design. Site conditions, customer preferences, and equipment configuration may significantly influence room geometry and layout. It is recommended to request specific site drawings from a Philips representative during the early stages of design.
Equipment Specifications for Installation
| Item No. | Equipment | Dimensions (W x D x H), mm | Mass, kg | Heat Dissipation, W | Noise Level, dBA | Comments | |
|---|---|---|---|---|---|---|---|
| 1 | Operator Console (without table) | 609x885x762 | 174 | 300 | 40 | ||
| 2 | Tomograph Gantry | 1868x2278x2320 | - | 6300 | 2000 | 50 | |
| 3 | Patient Table | - | 260 | - | - | ||
| 4 | Distribution board for climate control system | - | 100 | - | - | ||
| 5 | Main MRI Disconnect Switch | 450x170x600 | 35 | - | - | ||
| 6 | Cooling System Cabinet | 595x801x1955 | 320 | 6000 | 75 | Heat dissipation is utilized by the supplied climate control system. | |
| 7 | Data Processing Cabinet | 595x801x1955 | 333 | - | - | ||
| 8 | Gradient Cabinet (XP) | 804x1095x2000 | 1100 | - | - | ||
| 9 | Uninterruptible Power Supply (UPS) | ≈707x845x1930 | ≈470 | ≈9000 | 65 | Heat dissipation is utilized by the supplied climate control system. | |
| 10 | Battery Cabinet | ≈1000x845x1930 | ≈1626 | - | - | ||
| 11 | UPS Disconnect Switch | - | - | - | - | ||
| 12 | RF Interference Filter | - | 80 | - | - | ||
| 13 | Air Cooling Unit | - | - | - | 72 | ||
| 14 | Coil Accessory Cabinet | - | - | - | - |
Side and Top Views
Side View
Side View: Do not allow individuals with pacemakers in areas with magnetic field strength of 0.5 mT or higher. The isocenter of the tomograph is at a height of 1.004 m.
Schematic Section A-A
Schematic Section A-A: Illustrates the layout and magnetic field zones.
Schematic Section B-B
Schematic Section B-B: Illustrates the layout and magnetic field zones.
Magnetic Field Induction Zones
Magnetic Field Induction Zone (0.5 mT): Controlled access area.
Ferromagnetic Object Placement Check
Diagram for checking ferromagnetic object placement within a 3x3 meter area around the MPT isocenter:
- Perpendicular to Z-axis: Minimum distance requirements shown.
- Non-perpendicular to Z-axis: Minimum distance requirements shown.
General Notes on Ferromagnetic Objects: Avoid placing significant masses of metal, transformers, high-power electrical equipment, elevators, and power cables near the MRI procedure room. Vehicles, trams, etc., moving nearby can also have an undesirable influence. Structural metal beams should be at least 2.5 meters from the center of the apparatus.
Graph of minimum distance from MRI isocenter to moving ferromagnetic objects with specific weights: Shows distances in meters and weights in tons for both perpendicular and non-perpendicular orientations to the Z-axis.
Placement Recommendations and Comments
- Do not place the MRI procedure room adjacent (horizontally or vertically) to wards for pregnant women, children, cardiology patients, or rooms for round-the-clock patient stays (as per SP 2.1.2678-20). Individuals with pacemakers should not be in areas with magnetic field strength of 0.5 mT or higher. The isocenter height is 1.004 m.
- It is not recommended to install the tomograph below rooms from which water leakage through ceilings is possible.
- Do not place significant masses of metal, transformers, high-power electrical equipment, elevators, and power cables near the MRI procedure room. Vehicles, trams, etc., moving in close proximity to the MRI suite can also have an undesirable influence. Refer to the diagram and graph on sheet 3 for verification.
- Communications under the floor of the rooms, as well as between the walls and the Faraday cage, are highly undesirable. Besides their influence on the equipment's operation, access to them after installation will be impossible.
- It is not recommended to locate the MRI suite in areas influenced by communications (elevators, power lines, tram lines, metro lines, etc.). In such cases, the risk of magnetic field interference should be assessed by an accredited organization or the equipment manufacturer.
- A helium emergency exhaust pipe exits through the wall to the outside. Under normal conditions, a minimal amount of gaseous helium is released, but in an emergency, a large amount of very low-temperature helium is released in a short period. Therefore, the area within a 3-meter radius of the pipe outlet must be secured, access restricted, and openings, air intakes, and equipment requiring maintenance should be excluded.
- Provision must be made for MRI transportation routes. Typically, a temporary transport opening in the procedure room wall, measuring 2.5 m x 2.5 m (W x H), is made for equipment transportation.
- A temporary unloading area of 3 m x 3 m, located above the procedure room level, must be provided. The height of the threshold between the unloading area and the procedure room depends on the thickness of the Faraday cage floor.
- The total mass of the Faraday cage is approximately 5-7 tons, with distributed weight.
Heating, Ventilation, and Air Conditioning (HVAC)
The Philips climate control system is supplied to ensure the required air exchange and microclimate only within the MRI procedure room and technical room. A location for the external climate control unit (chiller) of approximately 3.3 m x 1.6 m x 1.8 m (W x D x H) and weighing ~1000 kg must be reserved. It is recommended to install the chiller near the technical room, outside the building, or on the roof in agreement with Philips. Additional climate control equipment is not required.
Other rooms within the MRI complex (e.g., control room, preparation room, etc.) are not connected to the climate control system. Air exchange in these rooms should be provided in accordance with applicable regulations.
Electrical Power Requirements
- Power supply scheme: Star connection, 5-wire, TN-C-S: 3 phases, neutral, protective conductor.
- Permissible voltage fluctuations: +10% / -10%.
- Supply voltage: 380/400 V.
- Mains frequency: (50±3) Hz.
- Phase-to-phase impedance: Not more than 0.11 Ohm (parameter to be checked at the MRI disconnect switch in the technical room before installation).
- Total power for the MR7700 MRI system: 115 kVA, Nominal current: 175 A.
- Peak current: 400A (for no more than 5 ms), 500A (for no more than 1 ms), Power factor = 0.9.
- Climate control system power: approximately 60 kVA, Nominal current: approximately 90 A.
- Two separate power feeds must be provided (one for the MRI system, one for the climate control system). For the MRI, the feed should come from the transformer substation via a UPS, with a cross-section ensuring maximum power consumption, equipment current, and phase-to-phase impedance not exceeding the required level. Only Philips equipment should be connected to this separate line. Power and grounding cables should be routed to the location indicated on the room preparation plan for installation. Free ends of cables should be at least 2 m long. Cable entry from below is recommended.
- The grounding system for the medical device must comply with local legislation and regulatory requirements. The grounding loop should be connected to the main grounding bus of the building. The grounding resistance should not exceed 1.5 Ohm.
- Lighting within the MRI procedure room is provided by the Faraday cage manufacturer. Lighting in the control room and technical room should be provided in accordance with current standards. Due to the numerous communications on the technical room ceiling, wall-mounted lighting is recommended.
Storage and Handling Conditions
The equipment is delivered in large crates (approximately 50 units, totaling about 22 tons). A location for temporary storage of the equipment must be prepared and agreed upon with the Philips Healthcare project manager, adhering to the following storage conditions. The temporary storage area should be in close proximity to the installation room.
Equipment must be stored in conditions that exclude exposure to atmospheric precipitation, low and high temperatures.
Uninterruptible Power Supply (UPS)
The UPS is typically supplied in two cabinets. Due to high heat dissipation, it is recommended to place the UPS in the MRI technical room. In this case, the climate control system will dissipate the excess heat from the UPS.
If there is insufficient space in the technical room for the UPS, it can be placed in a separate room with forced cooling, adjacent to the electrical room. In this scenario, a climate control system will be needed to manage the excess heat from the UPS.
There are no additional ventilation requirements for this Philips equipment. Ventilation should be designed according to applicable standards.
