EPI calibration method to minimize ghosting in reconstructed images

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United States of America Patent

PATENT NO 6700374
SERIAL NO

09537139

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Abstract

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A method of magnetic resonance imaging is provided. It includes supporting a subject in an examination region of an MRI scanner (A), and applying an EPI pulse sequence with the MRI scanner (A) to induce a detectable magnetic resonance signal from a selected region of the subject. The magnetic resonance signal are received and demodulated to generate raw data. Applied to the raw data are a pair of ghost reducing correction factors (.theta.,.DELTA.). The pair of corrections factors (.theta.,.DELTA.) included a phase correction (.theta.) and a read delay (.DELTA.). The phase correction (.theta.) compensates for phase errors in the raw data, and the read delay (.DELTA.) effectively shifts a data acquisition window (120) under which the raw data was collected to thereby align the raw data in k-space. The correction factors affect how data is loaded into k-space to generate k-space data, and the k-space data is subjected to a reconstruction algorithm to generate image data. Thereafter, values for the pair of correction factors (.theta.,.DELTA.) are derived from the image data.

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Patent Owner(s)

Patent OwnerAddress
MARCONI MEDICAL SYSTEMS INC595 MINER ROAD HIGHLAND HEIGHTS OH 44143

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dannels, Wayne R Richmond Heights, OH 37 607
Wu, Dee H Shaker Heights, OH 14 514

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