| 摘要 |
In a parallel or SENSE imaging technique in an MRI system ( 40 ), a calibration scan is conducted to generate a calibration image ( 86 ) indicative of sensitivity profiles of parallel imaging coils ( 76 a, . . . , 76 n) also in the regions where the magnetic field is distorted. This is accomplished by using a phase refocusing imaging protocol such as a spin echo technique, or by using a gradient echo technique where the echo time is very short. In addition, the phase encode direction of the calibration scan and a diagnostic imaging scan shall be matched. A diagnostic imaging scan is conducted using a diagnostic scan protocol to generate a diagnostic image representation from each parallel imaging coil. A SENSE processor ( 90 ) reconstructs a final diagnostic image ( 92 ) from the diagnostic image representations and the coil sensitivity profiles.
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