ASTM F2052-21 PDF

Full title and description

Standard Test Method for Measurement of Magnetically Induced Displacement Force on Medical Devices in the Magnetic Resonance Environment (ASTM F2052-21). This test method defines procedures to measure the static magnetic-field-gradient–induced displacement (deflection) force on medical devices and to compare that force to the device weight as a reference for MRI safety assessment.

Abstract

ASTM F2052-21 specifies a standardized laboratory method to quantify the magnetically induced displacement force (deflection) that a static magnetic field gradient can produce on medical devices placed in an MRI environment. The method is intended to help determine whether a device presents an unacceptable projectile or displacement risk in MR systems by directly measuring deflection under defined conditions and comparing the result to the device weight. The standard notes that this single test does not alone establish MR safety and that complementary tests (e.g., torque, RF heating) are required for a complete assessment.

General information

• Status: Active standard.
• Publication date: 2021 (ASTM designation F2052-21; approved/released in 2021).
• Publisher: ASTM International.
• ICS / categories: 11.040.40 (Implants for surgery, prosthetics and orthotics).
• Edition / version: F2052-21 (current revision published 2021).
• Number of pages: 10.

Scope

This test method covers measurement of magnetically induced displacement force produced by static magnetic field gradients on medical devices and comparison of that force to the weight of the device. It applies to devices that can be suspended from a thin string (the string weight must be less than 1% of the device weight), and it is intended for testing in a horizontal-bore MR system with the static magnetic field oriented horizontally and parallel to the bore. The method does not address magnetically induced torque, RF heating, acoustic noise, device–device interactions, or device functionality in the MR environment.

Key topics and requirements

• Measurement of magnetically induced displacement (deflection) force produced by spatial field gradients in MR systems.
• Comparison of measured magnetic force to the gravitational force on the device (device weight) as a conservative reference point.
• Test specimen mounting: device must be suspendable from a thin string whose weight is <1% of the device weight.
• Test environment: horizontal-bore MR system with field oriented parallel to bore; SI units required.
• Limitation: does not address magnetically induced torque (see ASTM F2213) or RF heating (see ASTM F2182); these are complementary assessments.
• Guidance for marking and labeling MR safety categories should follow ASTM F2503 practice.

Typical use and users

Primary users include medical device manufacturers, independent testing laboratories, MRI safety engineers, regulatory affairs specialists preparing submissions, and clinical researchers assessing compatibility of implants and devices with MR environments. The method is commonly used to support device labeling and regulatory filings; it is recognized in regulatory contexts such as FDA's recognized consensus standards listings.

Related standards

Closely related ASTM standards include Test Method F2213 for magnetically induced torque, Test Method F2182 for RF-induced heating, and Practice F2503 for marking devices for MR safety. F2052-21 updates and replaces earlier editions of F2052 (for example F2052-15). These documents are typically used together to form a complete MR-safety evaluation program.

Keywords

MRI, MR safety, magnetically induced displacement, deflection force, magnetic field gradient, implants, medical device testing, ASTM F2052-21, RF heating (related), torque (related), F2503 marking.

FAQ

Q: What is this standard?

A: ASTM F2052-21 is a standardized test method for measuring magnetically induced displacement (deflection) forces on medical devices in the magnetic resonance environment to support MR-safety assessment.

Q: What does it cover?

A: It covers the measurement procedure for static magnetic-field-gradient–induced displacement force on devices that can be suspended from a thin string, and comparison of that force to device weight. It does not cover torque, RF heating, or device functionality in MR; those require other tests.

Q: Who typically uses it?

A: Device manufacturers, third‑party testing laboratories, MRI safety engineers, and regulators use this standard when evaluating or documenting MR safety for implants and other medical devices. It is frequently cited in regulatory submissions and recognized by agencies such as the U.S. FDA.

Q: Is it current or superseded?

A: F2052-21 is the 2021 revision of the F2052 test method and is listed as an active ASTM standard; it replaces earlier editions such as F2052-15. Users should confirm current status with ASTM or national standards bodies at time of use.

Q: Is it part of a series?

A: It is part of a family of MRI-related ASTM standards addressing different MR safety concerns (for example, F2213 for torque, F2182 for RF heating, and F2503 for marking). These standards are often used together for comprehensive MR-safety evaluation.

Q: What are the key keywords?

A: MRI, MR safety, magnetically induced displacement, deflection force, magnetic field gradient, implants, ASTM F2052-21.