Method for monitoring respiration with acquired NMR data
First Claim
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1. A system for providing respiratory phase information during an NMR scan of a subject, which comprises:
- means for producing an NMR motion pulse sequence during the NMR image data scan;
means for acquiring the NMR motion signals produced by said NMR motion pulse sequence;
means for processing the motion NMR signals to produce a data set which indicates the position of features in the subject;
means for locating the position of a specific feature in said data set; and
means for producing a respiratory signal by correlating the current position of the specific feature with a reference position for that feature.
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Abstract
NMR data indicative of the motion of the anterior abdominal wall of a subject is acquired just prior to each image data pulse sequence in an NMR scan. The acquired motion NMR data is processed on-line to produce a signal indicative of the displacement of the abdominal wall from a reference position. The displacement values may be employed to produce a signal indicative of a respiration phase that can be used in connection with motion artifact reduction techniques.
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Citations
6 Claims
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1. A system for providing respiratory phase information during an NMR scan of a subject, which comprises:
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means for producing an NMR motion pulse sequence during the NMR image data scan; means for acquiring the NMR motion signals produced by said NMR motion pulse sequence; means for processing the motion NMR signals to produce a data set which indicates the position of features in the subject; means for locating the position of a specific feature in said data set; and means for producing a respiratory signal by correlating the current position of the specific feature with a reference position for that feature. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification