Affiliation: University of Massachusetts Medical School
- 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...
- 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...
- 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. ..
- 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...
- 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...