University System of Maryland

Hamid R Ghaffari

Warren D D'Souza

Hao H Zhang

Nilesh N Mistry

A method and apparatus for irradiation therapy using voxel based function measurements of organs-at-risk (OAR). The method includes determining size and location of each voxel of a plurality of voxels in a reference frame of a radiation device. The method further includes obtaining measurements that relate to utility of tissue type at each voxel. The method further includes determining a subset of the voxels that enclose an organ-at-risk (OAR) volume. The method further includes determining a value of a utility measure fj at each voxel of the subset based on a corresponding value of the measurements. The method further includes determining a series of beam shapes and intensities which minimize a value of an objective function that is based on a computed dose delivered to an OAR voxel multiplied by the utility measure fj for that voxel summed over all voxels.

System and method for irradiation therapy using voxel based functional measurements of organs at risk

A method and apparatus for irradiation therapy using voxel based function measurements of organs-at-risk (OAR). The method includes determining size and location of each voxel of a plurality of voxels in a reference frame of a radiation device. The method further includes obtaining measurements that relate to utility of tissue type at each voxel. The method further includes determining a subset of the voxels that enclose an organ-at-risk (OAR) volume. The method further includes determining a value of a utility measure &#x192;j at each voxel of the subset based on a corresponding value of the measurements. The method further includes determining a series of beam shapes and intensities which minimize a value of an objective function that is based on a computed dose delivered to an OAR voxel multiplied by the utility measure &#x192;j for that voxel summed over all voxels.

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Gainsville, FL, United States of America

Hamid R Ghaffari