Advocate Lutheran General Hospital, Park Ridge, Illinois

Location: Park Ridge, Illinois
Owner/Operator: Advocate Lutheran General Hospital
Client: Shiner + Associates
Architect: Cannon Design

Ground-Borne Vibration Assessment for MRI Installation at Illinois Hospital

Advocate Lutheran General Hospital is a 645-bed, non-profit teaching hospital located in the Chicago suburb of Park Ridge, Illinois. Founded in 1897, it is one of the largest hospitals in the Chicago area and serves as a major referral center for advanced medical care. The hospital operates a Level I Trauma Center and is home to Advocate Children’s Hospital – Park Ridge, the only children’s hospital in the north and northwest suburban region of Chicago.

The Healthcare Center planned two ground-floor MRI suites in a new Bed Replacement Tower, with space for a third unit nearby. Due to the sensitivity of high-field MRI systems to low-frequency ground vibration, HGC Engineering was retained to evaluate potential vibration exposure and provide practical guidance for achieving vendor performance limits. The review built on field measurements previously completed for the site and on vendor installation guidance, and was coordinated with OWP/P Architects (Now Cannon Design) to inform early design decisions.

Site Factors Impacting Hospital Acoustics and Medical Equipment

The MRI rooms sit on slab-on-grade about 110 feet south of a busy arterial and immediately south of an on-campus drive. Mechanical and electrical plant (transformers, switchgear, and emergency generators) lie close to the east. Because the imaging equipment couples directly to the floor, this combination of external traffic and nearby building systems creates a vibration environment that must be understood and managed in the architectural and mechanical design.

Vibration Testing of MRI Suites and representative Hospital Areas

The assessment combined manufacturer’s vibration criteria, a review of representative site measurements, and the preliminary building plans. Measurements captured both steady and transient ground motion in axes relevant to MRI performance. Siemens and GE criteria were reviewed and used as benchmarks to judge the need for mitigation. The analysis focused on practical, constructible solutions that could be integrated into the design and site operations.

Vibration Assessment Findings Relevant to Diagnostic Imaging Equipment

Measured conditions showed that nearby traffic could occasionally produce vibration levels that challenge MRI vendor’s limits; locations closer to the roadway showed the greatest exposure, while the proposed suite locations were generally more moderate but subject to intermittent peaks. Nearby mechanical systems presented additional, but more manageable, vibration contributions. In short, without mitigation the installation risked intermittent non-compliance with the vibration requirements.

Vibration Control Strategies for Hospital MRIs

Recommendations were developed to provide reliable imaging conditions, including that MRI units should be installed on separate concrete foundation blocks to inhibit vibration transfer from the surrounding structure. Additional recommendations to limit vibration caused by vehicle movements, and for vibration isolation of mechanical and electrical equipment such as transformers and emergency generators also provided. These measures collectively help stabilize the vibration environment and protect imaging quality.

Improving MRI Reliability Through Professional Vibration Consulting

The vibration assessment enabled the hospital to make confident, technically grounded decisions during the design phase. With appropriate isolation measures and operational controls in place, the planned MRI suites could achieve the performance required for clear, high-quality diagnostics. The study provided actionable guidance for architects, engineers, and hospital planners, ensuring that the imaging expansion moves forward with long-term reliability built in.

HGC Noise Vibration Acoustics Consulting Services Included

• Ground-Borne Vibration Measurement Review

• MRI Vendor Criteria Interpretation and Compliance Assessment

• Site Vibration Risk Analysis (Traffic & Building Systems)

• Vibration Mitigation Design

• Operational and Construction Controls Recommendations

• Technical Coordination with Architectural and Mechanical Teams