Affiliation: University of Massachusetts Medical School
- Theoretical and Numerical Study of MLEM and OSEM Reconstruction Algorithms for Motion Correction in Emission TomographyJoyoni Dey
University of Massachusetts Medical School, Division of Nuclear Medicine and Radiology, Worcester, MA 01655 USA
IEEE Trans Nucl Sci 56:2739-2749. 2009..The motion correction was applied to these acquisitions with the anthropomorphic phantom and the patient study, showing marked improvements of image quality with the estimated motion correction...
- Targeted 2D/3D registration using ray normalization and a hybrid optimizerJoyoni Dey
Department of Radiology, University of Massachusetts Medical School, Worcester, Massachusetts 01655, USA
Med Phys 33:4730-8. 2006..Another set of 50 random initial conditions from [+/-20] mm in x,y,z and [+/-10] deg in the three angles, yielded robustness of 84% (hybrid) versus 38% (Powell) using PI as metric, with accuracies 2.1 mm (hybrid) versus 2.0 mm (Powell)...
- Estimation and correction of cardiac respiratory motion in SPECT in the presence of limited-angle effects due to irregular respirationJoyoni Dey
Department of Radiology, Division of Nuclear Medicine, University of Massachusetts Medical School, Worcester, Massachusetts 01655, USA
Med Phys 37:6453-65. 2010..In this work, the authors investigate a method to overcome the effect of limited-angle reconstruction artifacts in SPECT when estimating respiratory motion...
- Use of MRI to assess the prediction of heart motion with gross body motion in myocardial perfusion imaging by stereotracking of markers on the body surfaceMichael A King
Department of Radiology, University of Massachusetts Medical School, Worcester, Massachusetts 01655
Med Phys 40:112504. 2013..Our target clinical application is to use a visual-tracking-system (VTS) which employs stereoimaging to estimate heart motion during SPECT/CT and PET∕CT myocardial perfusion imaging...
- MRI Investigation of the Linkage Between Respiratory Motion of the Heart and Markers on Patient's Abdomen and Chest: Implications for Respiratory Amplitude Binning List-Mode PET and SPECT StudiesPaul Dasari
Department of Radiology, University of Massachusetts Medical School, Worcester, MA 01655 USA and also with the Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, MA 01609 USA
IEEE Trans Nucl Sci 61:192-201. 2014..Based on this result, we propose the use of marker motion from both the chest and abdomen regions when estimating the internal heart motion to detect and address hysteresis when binning list-mode emission data...
- A flexible multicamera visual-tracking system for detecting and correcting motion-induced artifacts in cardiac SPECT slicesJoseph E McNamara
Department of Radiology, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester Massachusetts 01655, USA
Med Phys 36:1913-23. 2009..Taken together, these findings suggest that VTS-based motion correction is superior to either no-motion correction or the vendor-supplied software the authors investigated in clinical practice...
- Design of a Multi-Pinhole Collimator for I-123 DaTscan Imaging on Dual-Headed SPECT Systems in Combination with a Fan-Beam CollimatorMichael A King
Department of Radiology, University of Massachusetts Medical School Worcester, MA 01655 USA
IEEE Trans Nucl Sci 63:90-97. 2016..On the basis of these results we propose the further exploration of this design through simulations, and the development of combined MPH and fan-beam reconstruction...
- Digital anthropomorphic phantoms of non-rigid human respiratory and voluntary body motion for investigating motion correction in emission imagingArda Könik
Department of Radiology, University of Massachusetts Medical School, Worcester, MA, USA
Phys Med Biol 59:3669-82. 2014..The non-uniform rational B-spline data and the parameter files for these phantoms are freely available for downloading and can be used with the XCAT license. ..
- LROC Investigation of Three Strategies for Reducing the Impact of Respiratory Motion on the Detection of Solitary Pulmonary Nodules in SPECTMark S Smyczynski
Department of Radiology, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, MA 01655
IEEE Trans Nucl Sci 63:130-139. 2016..The Reconstruct and Shift method results in tumor detection that is equivalent to ideal motion correction...
- Surface normal overlap: a computer-aided detection algorithm with application to colonic polyps and lung nodules in helical CTDavid S Paik
Department of Radiology, Stanford University, Stanford, CA 94305 5450, USA
IEEE Trans Med Imaging 23:661-75. 2004..It is able to achieve 100% sensitivity for colonic polyps 10 mm and larger at 7.0 false positives (FPs)/dataset and 90% sensitivity for solid lung nodules 6 mm and larger at 5.6 FP/dataset...