Deformable registration of CT and cone-beam CT with local intensity matching.

Park S, Plishker W, Quon H, Wong J, Shekhar R, Lee J.

Phys Med Biol. 2017 Feb
7;62(3):927-947. doi: 10.1088/1361-6560/aa4f6d. Epub 2017 Jan 11. PubMed PMID: 28074785; PubMed Central PMCID: PMC5283299.

Technical Note: scuda: A software platform for cumulative dose assessment.

Park S, McNutt T, Plishker W, Quon H, Wong J, Shekhar R, Lee J.

Med Phys. 2016 Oct
43(10):5339. PubMed PMID: 27782691; PubMed Central PMCID: PMC5018004.

Software-based PET-MR image coregistration: combined PET-MRI for the rest of us!

Robertson MS, Liu X, Plishker W, Zaki GF, Vyas PK, Safdar NM, Shekhar R.

Pediatr Radiol. 2016 Oct
46(11):1552-61. doi: 10.1007/s00247-016-3641-8. Epub 2016 Jul 5. PubMed PMID: 27380195; PubMed Central PMCID: PMC5039099.

Graphics Processing Unit-Accelerated Nonrigid Registration of MR Images to CT Images During CT-Guided Percutaneous Liver Tumor Ablations.

Tokuda J, Plishker W, Torabi M, Olubiyi OI, Zaki G, Tatli S, Silverman SG, Shekher R, Hata N.

Acad Radiol. 2015 Jun
22(6):722-33. doi: 10.1016/j.acra.2015.01.007. Epub 2015 Mar 14. PubMed PMID: 25784325; PubMed Central PMCID: PMC4428967.

Three-dimensional contrast-enhanced multidetector CT for anatomic, dynamic, and perfusion characterization of abnormal myocardium to guide ventricular tachycardia ablations.

Tian J, Jeudy J, Smith MF, Jimenez A, Yin X, Bruce PA, Lei P, Turgeman A, Abbo A, Shekhar R, Saba M, Shorofsky S, Dickfeld T.

Circ Arrhythm Electrophysiol. 2010 Oct
3(5):496-504. doi: 10.1161/CIRCEP.109.889311. Epub 2010 Jul 24. PubMed PMID: 20657032.

Deformable Registration Accuracy Consortium. Results of a multi-institution deformable registration accuracy study (MIDRAS).

Brock KK

Int J Radiat Oncol Biol Phys. 2010 Feb 1
76(2):583-96. doi: 10.1016/j.ijrobp.2009.06.031. Epub 2009 Nov 10. PubMed PMID: 19910137.

Do tumors in the lung deform during normal respiration? An image registration investigation.

Wu J, Lei P, Shekhar R, Li H, Suntharalingam M, D’Souza WD.

Int J Radiat Oncol Biol Phys. 2009 Sep 1
75(1):268-75. doi:10.1016/j.ijrobp.2009.03.008. Epub 2009 Jun 8. PubMed PMID: 19515506.

Incorporation of preprocedural PET into CT-guided radiofrequency ablation of hepatic metastases: a nonrigid image registration validation study.

Lei P, Dandekar O, Widlus D, Shekhar R.

J Digit Imaging. 2010 Dec
23(6):780-92. doi:10.1007/s10278-009-9204-x. Epub 2009 May 27. PubMed PMID: 19472008; PubMed Central PMCID: PMC3046698.

An evaluation of planning techniques for stereotactic body radiation therapy in lung tumors.

Wu J, Li H, Shekhar R, Suntharalingam M, D’Souza W.

Radiother Oncol. 2008 Apr
87(1):35-43. doi: 10.1016/j.radonc.2008.02.010. Epub 2008 Mar 24. PubMed PMID: 18359529; PubMed Central PMCID: PMC2706126.

Integration of three-dimensional scar maps for ventricular tachycardia ablation with positron emission tomography-computed tomography.

Dickfeld T, Lei P, Dilsizian V, Jeudy J, Dong J, Voudouris A, Peters R, Saba M, Shekhar R, Shorofsky S.

JACC Cardiovasc Imaging. 2008 Jan
1(1):73-82. doi:10.1016/j.jcmg.2007.10.001. PubMed PMID: 19356409.

Automated 3D elastic registration for improving tumor localization in whole-body PET-CT from combined scanner.

Walimbe V, Dandekar O, Mahmoud F, Shekhar R.

Conf Proc IEEE Eng Med Biol Soc. 2006
1:2799-802. PubMed PMID: 17946137.

Hardware implementation of hierarchical volume subdivision-based elastic registration.

Dandekar O, Walimbe V, Shekhar R.

Conf Proc IEEE Eng Med Biol Soc. 2006
1:1425-8. PubMed PMID: 17946046.

Automatic segmentation of phase-correlated CT scans through nonrigid image registration using geometrically regularized free-form deformation.

Shekhar R, Lei P, Castro-Pareja CR, Plishker WL, D’Souza WD.

Med Phys. 2007 Jul
34(7):3054-66. PubMed PMID: 17822013.

FPGA-Accelerated Deformable Image Registration for Improved Target-Delineation During CT-Guided Interventions.

Dandekar O, Shekhar R.

IEEE Trans Biomed Circuits Syst. 2007 Jun
1(2):116-27. doi: 10.1109/TBCAS.2007.909023. PubMed PMID: 23851666.

Direct aperture deformation: an interfraction image guidance strategy.

Feng Y, Castro-Pareja C, Shekhar R, Yu C.

Med Phys. 2006 Dec
33(12):4490-8. PubMed PMID: 17278800.

Physically correct mesh manipulation in multi-level free-form deformation-based nonrigid registration.

Castro-Pareja C, Shekhar R.

Conf Proc IEEE Eng Med Biol Soc. 2004
3:1687-90. PubMed PMID: 17272028.

Quantitative real-time 3-dimensional stress echocardiography: a preliminary investigation of feasibility and effectiveness.

Walimbe V, Garcia M, Lalude O, Thomas J, Shekhar R.

J Am Soc Echocardiogr. 2007 Jan
0(1):13-22. PubMed PMID: 17218197.

Automatic elastic image registration by interpolation of 3D rotations and translations from discrete rigid-body transformations.

Walimbe V, Shekhar R.

Med Image Anal. 2006 Dec
10(6):899-914. Epub 2006 Oct 31. PubMed PMID: 17079184.

Automated 3-dimensional elastic registration of whole-body PET and CT from separate or combined scanners.

Shekhar R, Walimbe V, Raja S, Zagrodsky V, Kanvinde M, Wu G, Bybel B.

J Nucl Med. 2005 Sep
46(9):1488-96. PubMed PMID: 16157532.

Registration-assisted segmentation of real-time 3-D echocardiographic data using deformable models.

Zagrodsky V, Walimbe V, Castro-Pareja CR, Qin JX, Song JM, Shekhar R.

IEEE Trans Med Imaging. 2005 Sep
24(9):1089-99. PubMed PMID: 16156348.

Registration of real-time 3-D ultrasound images of the heart for novel 3-D stress echocardiography.

Shekhar R, Zagrodsky V, Garcia MJ, Thomas JD.

IEEE Trans Med Imaging. 2004 Sep
23(9):1141-9. PubMed PMID: 15377123.

FAIR: a hardware architecture for real-time 3-D image registration.

Castro-Pareja CR, Jagadeesh JM, Shekhar R.

IEEE Trans Inf Technol Biomed. 2003 Dec
426-34. PubMed PMID: 15000369.

Mutual information-based multimodality registration of cardiac ultrasound and SPECT images: a preliminary investigation.

Walimbe V, Zagrodsky V, Raja S, Jaber WA, DiFilippo FP, Garcia MJ, Brunken RC, Thomas JD, Shekhar R.

Int J Cardiovasc Imaging. 2003 Dec
19(6):483-94. PubMed PMID: 14690187.

High-speed registration of three- and four-dimensional medical images by using voxel similarity.

Shekhar R, Zagrodsky V, Castro-Pareja CR, Walimbe V, Jagadeesh JM.

Radiographics. 2003 Nov-Dec
23(6):1673-81. PubMed PMID: 14615572.

Mutual information-based rigid and nonrigid registration of ultrasound volumes.

Shekhar R, Zagrodsky V.

IEEE Trans Med Imaging. 2002 Jan
21(1):9-22. PubMed PMID: 11838664.