Iterative reconstruction of multiple-peak isotope images
AssigneeKoninklijke Philips Electronics N.V.
InventorsJinghan Ye, Mary K. Durbin, Xiyun Song, Lingxiong Shao
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Abstract
In an imaging method, estimated data is iteratively projected and backprojected. The iterative projecting and backprojecting includes projecting or backprojecting the estimated data along parallel paths each employing energy-dependent parameters appropriate for a different energy. During each iteration, the estimated data is adjusted based on comparison of the estimated data with measured data.
Claims23
An imaging method comprising:
- iteratively projecting and backprojecting estimated data, the iterative projecting and backprojecting including projecting or backprojecting the estimated data along parallel paths each employing one or more energy-dependent parameters appropriate for a different energy;
- and
- during each iteration, adjusting the estimated data based on comparison of the estimated data with measured data.
An imaging system comprising:
- a radiation detector for acquiring measured data from a subject after having administered to the subject a radiopharmaceutical emitting at two or more different photon energies;
- and
- a reconstruction processor for performing an image reconstruction process including:
- iteratively projecting and backprojecting estimated data, the iterative projecting and backprojecting including projecting or backprojecting the estimated data along parallel paths each employing one or more energy-dependent parameters appropriate for a different energy, and
- during each iteration, adjusting the estimated data based on comparison of the estimated data with the measured data acquired by the radiation detector.
A reconstruction processor programmed to iteratively reconstruct an image from measured data, each iteration including (i) projecting or backprojecting estimated data along parallel paths each employing one or more energy-dependent parameters appropriate for a different energy and (ii) adjusting the estimated data based on comparison of the projected or backprojected estimated data with measured data.
A digital storage medium encoding instructions which when executed by a processor perform reconstruction processing operations including (i) projecting or backprojecting estimated data along parallel paths each employing one or more energy-dependent parameters appropriate for a different energy and (ii) adjusting the estimated data based on comparison of the projected or backprojected estimated data with measured data.
An imaging method comprising:
- receiving projection data from an isotope which emits a first percentage of its emitted radiation at a first energy peak and a second percentage of its emitted radiation at a second energy peak;
- forward projecting an image estimate;
- operating on the forward projected image estimate in accordance with the first energy percentage and at least one of a first energy-dependent scattering correction, a first energy-dependent attenuation correction, and a first energy-dependent detector efficiency coefficient to generate a first energy corrected projected image estimate;
- operating on the forward projected image estimate in accordance with the second energy percentage and at least one of a second energy-dependent scattering correction, a second energy-dependent attenuation correction, and a second energy-dependent detector efficiency coefficient to generate a second energy corrected projected image estimate;
- comparing the received projection data with a combination of the first and second energy corrected projected image estimates to generate an estimated image correction;
- and
- correcting the estimated image with the estimated image correction.
Dependencies are inferred from the claim text.