Model based estimation of a complete or partial positron emission tomography attenuation map using maximum likelihood expectation maximization
First Claim
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1. A method of correcting attenuation in a magnetic resonance (MR) scanner and a positron emission tomography (PET) unit, the method comprising:
- acquiring PET sinogram data of an object within a field of view of the PET unit; and
producing an attenuation map based on a maximum likelihood expectation maximization (MLEM) of a parameterized model instance and the PET sinogram data.
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Abstract
Example embodiments are directed to a method of correcting attenuation in a magnetic resonance (MR) scanner and a positron emission tomography (PET) unit. The method includes acquiring PET sinogram data of an object within a field of view of the PET unit. The method further includes producing an attenuation map based on a maximum likelihood expectation maximization (MLEM) of a parameterized model instance and the PET sinogram data.
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25 Claims
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1. A method of correcting attenuation in a magnetic resonance (MR) scanner and a positron emission tomography (PET) unit, the method comprising:
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acquiring PET sinogram data of an object within a field of view of the PET unit; and producing an attenuation map based on a maximum likelihood expectation maximization (MLEM) of a parameterized model instance and the PET sinogram data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of correcting attenuation in a magnetic resonance (MR) scanner and a positron emission tomography (PET) unit, the method comprising:
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acquiring PET sinogram data of an object within a field of view of the PET unit; acquiring MR data of the object within a field of view of the MR scanner; producing an attenuation map based on a maximum likelihood expectation maximization (MLEM) of a parameterized model instance and the acquired PET sinogram and MR data, the MLEM being constrained by model parameters of the parameterized model instance. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A device comprising:
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a positron emission tomography (PET) unit including a plurality of detection units and configured to acquire PET sinogram data of an object within a field of view of the PET unit; a magnetic resonance (MR) scanner configured to acquire MR data of the object within a field of view of the MR scanner; and a computer configured to produce an attenuation map based on a maximum likelihood expectation maximization (MLEM) of a parameterized model instance and the acquired PET sinogram and MR data, the MLEM being constrained by model parameters of the parameterized model instance.
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Specification