Neurophysiological monitoring for prospective motion gating in radiological imaging

Abstract

A system, method and non-transitory computer-readable storage medium for monitoring motion during medical imaging. The monitoring of the motion includes initiating an acquisition of image data, measuring physiological signals of a patient, generating a prediction signal by integrating the physiological signals, determining whether patient motion is likely to occur based on the prediction signal and modifying the acquisition of image data, if it is predicted that patient motion is likely to occur.

Description

Background technique [0001] Acquisition of medical images for tomography (eg CT or MRI) may take place over an extended period of time (eg seconds or minutes). Data is collected over time and reconstructed to create a final image volume. However, patient motion during an imaging session may cause parts of the data to be corrupted because data acquired while the patient was in a different body position cannot be combined with the remaining data. Therefore, motion during the imaging session greatly complicates image reconstruction. [0002] Current motion correction and motion compensation algorithms are retrospective. For example, motion corrupted data may be rejected during final image reconstruction. However, it is difficult to determine during imaging how much motion-damaged data has been acquired. Consequently, final image characteristics, such as signal-to-noise ratio, may vary between otherwise identical scans because different amounts of data may be used in image rec...

AI Technical Summary

Problems solved by technology

However, it is difficult to determine how much motion-damaged data has been acquired during imaging

Consequently, the final image characteristics (such as signal-to-noise ratio) may vary between otherwise identical scans because different amounts of data may be used in image reconstruction

Additionally, for medical imaging procedures that require ionizing radiation (such as CT imaging), it is desirable to limit radiation exposure to the patient and to any operator close to the imaging system

However, collecting corrupted data that would eventually be rejected would still expose the patient to radiation without any added benefit

Devices that use motion compensation methods to detect motion during acquisition inherently suffer from the same problem because the image data must still be acquired first

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