Method and apparatus for proton computed tomography

University of Lincoln (2016) Method and apparatus for proton computed tomography. .

P300927WO_WO2016016653_Published Spec.pdf
P300927WO_WO2016016653_Published Spec.pdf

Item Type:Patent
Item Status:Live Archive


A method of reconstructing a 3-dimensional image in a proton transmission computerised tomography (CT) apparatus is disclosed. The method comprises the creation of a reconstruction matrix. The matrix is created by directing a plurality of particles to traverse the object; and for each particle, measuring the trajectory and energy of each particle before and after it has traversed the object; for each particle, calculating the water-equivalent path length within the object; and for each particle, calculating the positions at which it entered and exited the object; and adding the water-equivalent path length, entry and exit positions to the reconstruction matrix. This procedure is repeated from a plurality of angular positions surrounding an object to be imaged. Then, a spatially varying 2- dimensional filter function is applied to the reconstruction matrix. Subsequently, a correction factor is applied to the filtered reconstruction matrix to at least partially correct for the finite extent of the matrix.

Additional Information:WO2016/016653
Keywords:proton therapy, computerised tomography, Back projection
Subjects:F Physical Sciences > F350 Medical Physics
Divisions:College of Science > School of Computer Science
ID Code:22206
Deposited On:05 Feb 2016 21:53

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