Automated eye blink detection and correction method for clinical MR eye imaging.
Magn Reson Med
; 78(1): 165-171, 2017 07.
Article
en En
| MEDLINE
| ID: mdl-27476861
ABSTRACT
PURPOSE:
To implement an on-line monitoring system to detect eye blinks during ocular MRI using field probes, and to reacquire corrupted k-space lines by means of an automatic feedback system integrated with the MR scanner.METHODS:
Six healthy subjects were scanned on a 7 Tesla MRI whole-body system using a custom-built receive coil. Subjects were asked to blink multiple times during the MR-scan. The local magnetic field changes were detected with an external fluorine-based field probe which was positioned close to the eye. The eye blink produces a field shift greater than a threshold level, this was communicated in real-time to the MR system which immediately reacquired the motion-corrupted k-space lines.RESULTS:
The uncorrected images, using the original motion-corrupted data, showed severe artifacts, whereas the corrected images, using the reacquired data, provided an image quality similar to images acquired without blinks.CONCLUSION:
Field probes can successfully detect eye blinks during MRI scans. By automatically reacquiring the eye blink-corrupted data, high quality MR-images of the eye can be acquired. Magn Reson Med 78165-171, 2017. © 2016 International Society for Magnetic Resonance in Medicine.Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Radiometría
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Parpadeo
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Imagen por Resonancia Magnética
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Aumento de la Imagen
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Ojo
Tipo de estudio:
Diagnostic_studies
Límite:
Humans
Idioma:
En
Revista:
Magn Reson Med
Asunto de la revista:
DIAGNOSTICO POR IMAGEM
Año:
2017
Tipo del documento:
Article
País de afiliación:
Países Bajos