Mr. Spencer Cutler Profile

Spencer Cutler

at Duke Univ Medical Ctr

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Author

Publications (4)

Proceedings Article | 14 March 2009 Paper

Initial investigation of novel trajectories to improve chest wall imaging in a dedicated breast computed tomography system

Dominic Crotty, Randolph McKinley, Priti Madhav, Spencer Cutler, Martin Tornai

Proceedings Volume 7258, 72585L (2009) https://doi.org/10.1117/12.812500

KEYWORDS: Breast, Imaging systems, Chest, Optical spheres, Head, X-rays, Image quality, X-ray computed tomography, Computer aided design, Visualization

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Proceedings Article | 10 March 2006 Paper

Initial comparison of registration and fusion of SPECT-CmT mammotomography images

Esther Dura, Priti Madhav, Spencer Cutler, Timothy Turkington, Martin Tornai

Proceedings Volume 6144, 614438 (2006) https://doi.org/10.1117/12.654477

KEYWORDS: Image registration, Single photon emission computed tomography, Breast, Image fusion, Visualization, Signal attenuation, 3D image processing, Image segmentation, Mammography, Image resolution

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A hybrid, dual modality single photon emission computed tomography (SPECT) and x-ray computed mammotomography (CmT) scanner for dedicated breast and axillary imaging is under development. CmT imaging provides high resolution anatomical images, whereas SPECT provides functional images albeit with coarser resolution. As is being seen clinically in whole body imaging, integration of the images is expected to enhance (visually) and improve (with attenuation correction of SPECT) information provided by either modality for the detection, characterization and potentially staging of breast cancer. The registration of these images considers variations in object positions between the different modalities and imaging parameters (pixel size, conditions of acquisition, scan limitations). Automatic methods can be used which find the geometric transformations of the different imaging modalities involved. Here we demonstrate the initial stages of iterative 2-dimensional registration and fusion of SPECT with parallel beam geometry and CmT with offset cone-beam acquisition geometry for mammotomography with images acquired and reconstructed independently on each system. Two registration algorithms are considered: the first is an intrinsic correlation, Mutual Information (MI) method based on intrinsic image content; the second is a rigid body transform method, Iterative Closest Point (ICP) method based on identification of fiducial markers visible to both emission (SPECT) and transmission (CmT) imaging modalities. Experiments include use of a geometric resolution/frequency phantom imaged under different conditions, and two different anthropomorphic breast phantom sizes (325 and 935mL). Initial results with the geometric phantom demonstrate that MI can be misled by highly symmetric features, and ICP using control points is more accurate to within fractions of a voxel. Initial breast phantom studies indicate that object size and SPECT resolution limitations may contribute to registration errors.

Proceedings Article | 20 April 2005 Paper

Design and development of a fully 3D dedicated x-ray computed mammotomography system

Martin Tornai, Randolph McKinley, Caryl Bryzmialkiewicz, Priti Madhav, Spencer Cutler, Dominic Crotty, James Bowsher, Ehsan Samei, Carey Floyd

Proceedings Volume 5745, (2005) https://doi.org/10.1117/12.595636

KEYWORDS: Breast, Imaging systems, X-rays, Computing systems, X-ray detectors, X-ray imaging, Sensors, Reconstruction algorithms, Prototyping, Distortion

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Proceedings Article | 14 April 2005 Paper

Anthropomorphic breast phantoms for preclinical imaging evaluation with transmission or emission imaging

Martin Tornai, Randolph McKinley, Caryl Bryzmialkiewicz, Spencer Cutler, Dominic Crotty

Proceedings Volume 5746, (2005) https://doi.org/10.1117/12.596094

KEYWORDS: Breast, Imaging systems, Chest, Radiography, Image compression, Tissues, Signal attenuation, X-rays, Photography, Minerals

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