Selective MR imaging of segmented anatomy
First Claim
1. A method for imaging a desired structure in a subject with a magnetic resonance imaging (MRI) system, the steps comprising:
- a) acquiring an image with the MRI system during a first session that depicts the desired structure;
b) segmenting the acquired image to identify a position and boundary of the desired structure;
c) prescribing a pulse sequence using the identified position and boundary produced in step b) to tailor a radio frequency (RF) pulse for application to the desired structure; and
d) acquiring an image of the desired structure using the MRI system and the pulse sequence prescribed in step c).
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Abstract
A system and method for performing an MRI or MRS scan that is optimized for a particular target structure. A prescan is conducted during a first session in which an image that is optimized for segmentation is acquired along with an alignment scout image or a 2D or 3D navigator signal. The segmentation process is employed to locate and define the target structure. During a second session the alignment scout image or navigator signal is reacquired and the information is used to determine the position transformation needed to align images from the two sessions. The position transformation information and the segmentation information are then employed to tailor a prescribed pulse sequence to examine the target structure.
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Citations
17 Claims
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1. A method for imaging a desired structure in a subject with a magnetic resonance imaging (MRI) system, the steps comprising:
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a) acquiring an image with the MRI system during a first session that depicts the desired structure; b) segmenting the acquired image to identify a position and boundary of the desired structure; c) prescribing a pulse sequence using the identified position and boundary produced in step b) to tailor a radio frequency (RF) pulse for application to the desired structure; and d) acquiring an image of the desired structure using the MRI system and the pulse sequence prescribed in step c). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for imaging a desired structure in a subject with a magnetic resonance imaging (MRI) system, the steps comprising:
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a) performing a first data acquisition session with the MRI system comprising; a)i) acquiring a first set of imaging data from a portion of the subject including the desired structure; a)ii) acquiring alignment data that indicates a position of the subject during the first data acquisition session; b) reconstructing a first image from the first set of imaging data acquired during step a); c) segmenting the first image to identify a position and boundary of the desired structure; d) performing a second data acquisition session with the MRI system comprising; d)i) acquiring alignment data that indicates a position of the subject during the second data acquisition session; d)ii) positioning the subject in the position of the subject during the first data acquisition session using the alignment data acquired during the first imaging session and the alignment data acquired during the second imaging session; d)iii) prescribing a pulse sequence based on the position and boundary of the desired structure identified in step c) to target the desired structure by using the identified position and boundary to tailor a radio frequency (RF) pulse for application to the desired structure; d)iv) acquiring a second set of imaging data from a portion of the patient including the desired structure using the MRI system and the pulse sequence prescribed in step d)iii); and e) reconstructing an image of the desired structure from at least the second set of imaging data. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification