Soft field tomography system and method

A soft field tomography system comprising:

• a plurality of sensing elements configured to couple to an object;
• an excitation driver coupled to the plurality of sensing elements for transmitting an excitation to the plurality of sensing elements;
• and
• a computing device coupled to the excitation driver, the computing device being configured to:
• define a first mesh of the object, the first mesh including a plurality of nodes and elements;
• compute a response of the object according to the applied excitation;
• obtain a reference response to the applied excitation;
• compute a distribution of one or more properties of the object using the computed response, the reference response, and the first mesh;
• identify a region of interest according to the computed distribution of the one or more properties of the object;
• and
• update at least a subset of the nodes in the first mesh to generate an updated mesh of the object by moving each node of the subset of the first mesh towards the region of interest using a movement scaling parameter as defined by,
• Δ
• ⁢
• ⁢
• d
• =
• k
• d
• 2
• ⨯
• r
• 2
• ,
• wherein Δd is a movement distance for each node, d is a distance between the region of interest and a current location for each node, k is a coefficient, and r is the shortest distance of the node to any of the plurality of sensing elements, and
• wherein a connectivity relationship between each of the subset of the nodes in the updated mesh remains the same as in the first mesh.

A non-transitory computer readable medium comprising instructions which when executed by a processor or computer perform an iterative method of:

• defining a first mesh of an object, the first mesh including a plurality of nodes and elements;
• applying an excitation to the object;
• computing a response of the object to the applied excitation;
• obtaining a reference response of the object corresponding to the applied excitation;
• computing a distribution of one or more properties of the object using the computed response, the reference response, and the first mesh;
• and
• updating at least a subset of the nodes in the first mesh to form an updated mesh of the object by moving each node of the subset of the first mesh towards the region of interest using a movement scaling parameter as defined by,
• Δ
• ⁢
• ⁢
• d
• =
• k
• d
• 2
• ⨯
• r
• 2
• ,
• wherein Δd is a movement distance for each node, d is a distance between the region of interest and a current location for each node, k is a coefficient, and r is the shortest distance of the node to any of the plurality of sensing elements, and
• wherein a connectivity relationship between each of the subset of the nodes in the updated mesh remains the same as in the first mesh.