Method for testing magnetic resonance imaging equipment that executes a phase contrast MRI flow imaging sequence, referred to as "4D flow", in the presence of a phantom which has a reference flow, in order to test the performance of velocimetry measurements which are obtained when said "4D flow" sequence is used in clinical practice, by characterizing a degree of confidence in the velocimetry measurements, said reference flow being real and well known by computational fluid mechanics modeling, comprising a phantom imaging step characterized in that: a) a digital phantom design file is defined, which has the reference flow, and a reference pair is produced from this digital file, which pair is formed by a digital phantom which is obtained through digital processing of said design file and a physical phantom produced by a production method which is controlled by said digital design file, b) MRI flow data are then modelled by acquiring, by magnetic resonance, a digital map of the velocity field in the volume explored, which map is obtained by the "4D flow" sequence to be characterized, of the three components of the velocity over time of the digital phantom subjected to a reference fluidic supply sequence in order to record a first digital data reference file, and record the reference fluidic supply parameters in order to generate the reference flow, c) MRI flow data are then acquired by acquiring, by magnetic resonance, a digital map of the velocity field in the volume explored of the three components of the velocity over time by the MRI equipment controlled by the "4D flow" sequence to be characterized, of the physical phantom supplied with said reference fluidic supply sequence, in order to record a second file of experimentally measured digital data, the supply being controlled by said reference fluidic supply parameters, d) after performing the steps of resetting, correcting and formatting the data, which steps are required for space-time compatibility, said digital data files are then compared to calculate at least one error indicator representative of the differences between said digital files and representative of the performance of the velocimetry measurements acquired on the MRI equipment by the "4D flow" sequence for the reference flow. a) a digital phantom design file is defined, which has the reference flow, and a reference pair is produced from this digital file, which pair is formed by a digital phantom which is obtained through digital processing of said design file and a physical phantom produced by a production method which is controlled by said digital design file, b) MRI flow data are then modelled by acquiring, by magnetic resonance, a digital map of the velocity field in the volume explored, which map is obtained by the "4D flow" sequence to be characterized, of the three components of the velocity over time of the digital phantom subjected to a reference fluidic supply sequence in order to record a first digital data reference file, and record the reference fluidic supply parameters in order to generate the reference flow, c) MRI flow data are then acquired by acquiring, by magnetic resonance, a digital map of the velocity field in the volume explored of the three components of the velocity over time by the MRI equipment controlled by the "4D flow" sequence to be characterized, of the physical phantom supplied with said reference fluidic supply sequence, in order to record a second file of experimentally measured digital data, the supply being controlled by said reference fluidic supply parameters, d) after performing the steps of resetting, correcting and formatting the data, which steps are required for space-time compatibility, said digital data files are then compared to calculate at least one error indicator representative of the differences between said digital files and representative of the performance of the velocimetry measurements acquired on the MRI equipment by the "4D flow" sequence for the reference flow.