Accelerated Reliability Growth Test for Magnetic Resonance Imaging System Using Time-of-Flight Three-Dimensional Pulse Sequence

Accelerated Reliability Growth Test for Magnetic Resonance Imaging System Using Time-of-Flight Three-Dimensional Pulse Sequence

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A magnetic resonance imaging (MRI) system is a complex, high cost, and long-life product.It is a widely known fact that performing pentair hose a system reliability test of a MRI system during the development phase is a challenging task.The major challenges include sample size, high test cost, and long test duration.This paper introduces a novel approach to perform a MRI system reliability test in a reasonably acceptable time with one sample size.

Our approach is based on an accelerated reliability growth test, which consists of test cycle made of a very high-energy time-of-flight three-dimensional (TOF3D) pulse sequence representing an actual hospital usage scenario.First, we construct a nominal day usage scenario based on actual data collected from an MRI system used inside the hospital.Then, we calculate the life-time stress based on a usage scenario.Finally, we develop an accelerated reliability growth test cycle based on a TOF3D pulse sequence that exerts highest vibration energy on the gradient coil and MRI system.

We use a vibration energy model to map the life-time stress and reduce the test duration from 537 to 55 days.We use a Crow AMSAA plot to demonstrate that system design reaches its useful life after crossing the infant old taylor whiskey 1933 price mortality phase.