Vikren Sarkar, PhD

Languages spoken: English, French

Academic Information

Departments: Radiation Oncology - Associate Professor

Academic Office Information

Vikren.Sarkar@hci.utah.edu

Vikren Sarkar, PhD, is a tenured associate professor in the Department of Radiation Oncology at the University of Utah and a medical physicist at Huntsman Cancer Hospital (HCH). Dr. Sarkar earned a B.A. from Colorado College and a B.S. degree from Columbia University. He received his Ph.D. in medical physics from the University of Texas Health Sciences Center at San Antonio, Texas. Dr. Sarkar is an active member of the American Association of Physicists in Medicine (AAPM), and the American Society for Therapeutic Radiology and Oncology (ASTRO). Dr. Sarkar’s clinical and research interests include low-dose image-guided radiotherapy (IGRT), radiosurgery (SRS), stereotactic body radiation therapy (SBRT), proton therapy and adaptive radiotherapy. He is one of the lead medical physicists for proton therapy, SRS/SBRT, and Total Body Irradiation (TBI).

Education History

Professional Other Quantic School of Business and Technology
 Executive M.B.A.
Postdoctoral Fellowship University of Utah
Medical Physics 		Postdoctoral Fellow
Doctoral Training University of Texas Health Science Center
Medical Physics (Therapy track) 		Ph.D.
Undergraduate Columbia University
Biomedical Engineering, Imaging track, Magna Cum Laude 		B.S.
Undergraduate Colorado College
Physics, Summa Cum Laude 		B.A.

Selected Publications

  1. Sarkar V, Paxton A, Su F, Price R, Nelson G, Szegedi M, James SS, Salter BJ (2023). An evaluation of the use of DirectSPR images for proton planning in the RayStation treatment planning software. J Appl Clin Med Phys, e13900.
  2. Zhao H, Paxton A, Sarkar V, Price RG, Huang J, Su FF, Li X, Rassiah P, Szegedi M, Salter B (2022). Surface-Guided Patient Setup Versus Traditional Tattoo Markers for Radiation Therapy: Is Tattoo-Less Setup Feasible for Thorax, Abdomen and Pelvis Treatment? Cureus, 14(8), e28644.
  3. Li X, Su FC, Sarkar V, Zhao H, Ibanez S, Kunz JN, Nelson G, Jessica Huang Y (2022). Impact of detector selection on commissioning of Leipzig surface applicators with improving immobilization in high-dose-rate brachytherapy. Brachytherapy, 21(4), 511-519.
  4. Hutten RJ, Nelson G, Sarkar V, Johnson SB, Tao R, Hitchcock Y, Chan J, Schroeder J, Kokeny K (2022). Feasibility and clinical utility of a workflow interfacing radiation oncology lung stereotactic body radiotherapy treatment planning and diagnostic radiology. Pract Radiat Oncol, 12(6), e512-e516.
  5. Dial C, Sarkar V, Nelson G, Paxton A, Salter B (2022). Technical note: A method for generating lesion-specific nonuniform rotational margins for targets remote from isocenter. Med Phys.
  6. Odell DW, Albrechtsen RD, Sindt JE, Gole R, Brown S, Parsons MW, Paxton AB, Sarkar V, Lloyd S, Brogan SE, Tao R (2021). The Effect of Measured Radiotherapy Dose on Intrathecal Drug Delivery System Function. Neuromodulation, 24(7), 1204-1208.
  7. Huang YJ, Sarkar V, Paxton A, Zhao H, Su FF, Price R, Salter BJ (2021). An Investigation of Radiation Treatment Learning Opportunities in Relation to the Radiation Oncology Electronic Medical Record: A Single Institution Experience. Adv Radiat Oncol, 7(1), 100812.
  8. Szegedi M, Sarkar V, Paxton A, Rassiah P, Salter BJ (2021). Seismic reinforcement of a linac installation. J Appl Clin Med Phys, 22(4), 166-171.
  9. Zhao H, Paxton A, Sarkar V, Huang YJ, Frances Su FC, Haacke C, Rassiah-Szegedi P, Szegedi M, Salter B (2020). Prevention of Radiation Therapy Treatment Deviations by a Novel Combined Biometric, Radiofrequency Identification, and Surface Imaging System. Pract Radiat Oncol, 11(2), e229-e235.
  10. Nelson G, Paxton A, Kunz J, Huang J, Szegedi M, Sarkar V, Salter B (2020). FMEA occurrence values for four failure modes occurring using look-up tables for dose calculations. J Appl Clin Med Phys, 22(2), 9-12.
  11. Sarkar V, Szegedi M, Paxton A, Nelson G, Rassiah-Szegedi P, Reddy CB, Tao R, Hitchcock YJ, Kokeny KE, Salter BJ (2020). Erratum: "Preliminary clinical experience with Calypso anchored beacons for tumor tracking in lung SBRT" [Med. Phys. (2020)]. Med Phys (48(1), p. 533). United States.
  12. Sarkar V, Lloyd S, Paxton A, Dial C, Rassiah P, Szegedi MW, Hitchcock YJ, Salter BJ (2021). Evaluation of the dosimetric impact of changes in shoulder position on target coverage for spine SBRT to metastases in the lower cervical spine region. J Radiosurg SBRT, 7(4), 321-328.
  13. Szegedi M, Boehm C, Paxton A, Rassiah-Szegedi P, Sarkar V, Zhao H, Su F, Kokeny KE, Lloyd S, Tward J, Salter BJ (2020). Comparison of transperineal ultrasound image guidance technique to transabdominal technique for prostate radiation therapy. Med Phys, 47(12), 6113-6121.
  14. Paxton AB, Sarkar V, Kunz JN, Szegedi M, Zhao H, Huang YJ, Nelson G, Rassiah P, Su FF, Salter BJ (2020). Evaluation of the effects of implementing a diode transmission device into the clinical workflow. Phys Med, 80, 335-341.
  15. Sarkar V, Szegedi M, Paxton A, Nelson G, Rassiah-Szegedi P, Reddy CB, Tao R, Hitchcock YJ, Kokeny KE, Salter BJ (2020). Preliminary clinical experience with Calypso anchored beacons for tumor tracking in lung SBRT. Med Phys, 47(9), 4407-4415.
  16. Rassiah P, Su FF, Huang YJ, Spitznagel D, Sarkar V, Szegedi MW, Zhao H, Paxton AB, Nelson G, Salter BJ (2020). Using failure mode and effects analysis (FMEA) to generate an initial plan check checklist for improved safety in radiation treatment. J Appl Clin Med Phys, 21(8), 83-91.
  17. Sarkar V, Paxton A, Rassiah P, Kokeny KE, Hitchcock YJ, Salter BJ (2020). Evaluation of dose distribution differences from five algorithms implemented in three commercial treatment planning systems for lung SBRT. J Radiosurg SBRT, 7(1), 57-66.
  18. Zhao H, Williams N, Poppe M, Sarkar V, Wang B, Rassiah-Szegedi P, Huang YJ, Kokeny K, Gaffney D, Salter B (2019). Comparison of surface guidance and target matching for image-guided accelerated partial breast irradiation (APBI). Med Phys, 46(11), 4717-4724.
  19. Sarkar V, Paxton A, Kunz J, Szegedi M, Nelson G, Rassiah-Szegedi P, Zhao H, Huang YJ, Su F, Salter BJ (2019). A systematic evaluation of the error detection abilities of a new diode transmission detector. J Appl Clin Med Phys, 20(9), 122-132.
  20. Zhao H, Sarkar V, Wang B, Rassiah-Szegedi P, Szegedi M, Jessica Huang Y, Huang L, Tward J, Salter B (2019). Calculation of delivered composite dose from Calypso tracking data for prostate cancer: And subsequent evaluation of reasonable treatment interruption tolerance limits. J Appl Clin Med Phys, 20(8), 105-113.
  21. Nelson G, Pigrish V, Sarkar V, Su FC, Salter B (2019). Technical Note: The use of DirectDensityTM and dual-energy CT in the radiation oncology clinic. J Appl Clin Med Phys, 20(3), 125-131.
  22. Sarkar V, Lloyd S, Paxton A, Huang L, Su FC, Tao R, Tward J, Zhao H, Salter B (2019). Daily breathing inconsistency in pancreas SBRT: a 4DCT study. J Gastrointest Oncol, 9(6), 989-995.
  23. Gonzalez VJ, Hullett CR, Burt L, Rassiah-Szegedi P, Sarkar V, Tward JD, Hazard LJ, Huang YJ, Salter BJ, Gaffney DK (2017). Impact of prone versus supine positioning on small bowel dose with pelvic intensity modulated radiation therapy. Med Phys, 2(2), 235-243.
  24. Salter BJ, Szegedi M, Boehm C, Sarkar V, Rassiah-Szegedi P, Wang B, Zhao H, Huang J, Huang L, Kokeny K, Tward JD (2017). Comparison of 2 transabdominal ultrasound image guidance techniques for prostate and prostatic fossa radiation therapy. Pract Radiat Oncol, 7(2), e99-e107.
  25. Gonzalez VJ, Hullett CR, Burt L, Rassiah-Szegedi P, Sarkar V, Tward JD, Hazard LJ, Huang YJ, Salter BJ, Gaffney DK (2017). Impact of prone versus supine positioning on small bowel dose with pelvic intensity modulated radiation therapy. Adv Radiat Oncol, 2(2), 235-243.
  26. Ahmed F, Sarkar V, Gaffney DK, Salter B, Poppe MM (2016). Analysis of nodal coverage utilizing image guided radiation therapy for primary gynecologic tumor volumes. Med Dosim, 41(3), 195-8.
  27. Ganesan K, Lloyd S, Sarkar V (2016). Discovering Related Clinical Concepts Using Large Amounts of Clinical Notes. Biomed Eng Comput Biol, 7(Suppl 2), 27-33.
  28. Zhao H, Wang B, Sarkar V, Rassiah-Szegedi P, Huang YJ, Szegedi M, Huang L, Gonzalez V, Salter B (2016). Comparison of surface matching and target matching for image-guided pelvic radiation therapy for both supine and prone patient positions. J Appl Clin Med Phys, 17(3), 14-24.
  29. Huang YJ, Harrison A, Sarkar V, Rassiah-Szegedi P, Zhao H, Szegedi M, Huang L, Wilson B, Gaffney DK, Salter BJ (2016). Detection of late radiation damage on left atrial fibrosis using cardiac late gadolinium enhancement magnetic resonance imaging. Adv Radiat Oncol, 1(2), 106-114.
  30. Huang YJ, Harrison A, Sarkar V, Rassiah-Szegedi P, Zhao H, Szegedi M, Huang L, Wilson B, Gaffney DK, Salter BJ (2016). Detection of late radiation damage on left atrial fibrosis using cardiac late gadolinium enhancement magnetic resonance imaging. Med Phys, 1(2), 106-114.
  31. Sarkar V, Huang L, Huang YJ, Szegedi MW, Rassiah-Szegedi P, Zhao H, Salter BJ (2016). Head to head comparison of two commercial phantoms used for SRS QA. J Radiosurg SBRT, 4(3), 213-223.
  32. Sarkar V, Huang L, Huang YJ, Szegedi MW, Rassiah-Szegedi P, Zhao H, Hitchcock YJ, Kokeny KE, Wang B, Salter BJ (2016). Dosimetric evaluation of abdominal compression as a method to reduce the incidence of radiation-induced pneumonitis in lung SBRT treatment. J Radiosurg SBRT, 4(2), 125-132.
  33. Saenz D, Roring J, Cruz W, Sarkar V, Papanikolaou N, Stathakis S (11/24/2015). Commissioning and cross-comparison of four scanning water tanks. Int J Cancer Oncol, 4, 415.
  34. Sarkar V, Huang L, Huang Y, Szegedi M, Rassiah-Szegedi P, Zhao H, Salter B (7/14/15). A Head to Head Comparison of Two Commercial Phantoms Used for SRS QA [Abstract]. Med Phys, 42(6), 3339.
  35. Rassiah-Szegedi P, Szegedi M, Sarkar V, Zhao H, Huang Y, Huang L, Salter B (7/14/15). Characterization of Efficiency and Plan Quality for the FFF Beams On Various Anatomical Sites [Abstract]. Med Phys, 42(6), 3370.
  36. Huang Y, Tward J, Rassiah-Szegedi P, Zhao H, Sarkar V, Huang L, Szegedi M, Kokeny K, Salter B (7/14/15). Feasibility of MRI-Based Preplan On Low Dose Rate Prostate Brachytherapy [Abstract]. Med Phys, 42(6), 3319.
  37. Sarkar V, Huang L, Suneja G, Rassiah P, Huang J, Zhao H, Szegedi M, Jensen R, Shrieve D, Salter B (4/25/15). Hybrid Modulated Arc Therapy for treatment of Cavernous Sinus Lesions [Abstract]. Journal of RadioSurgery and SBRT, 3(S1), 53.
  38. Huang L, Sarkar V, Rassiah P, Huang J, Zhao H, Szegedi M, Hitchcock Y, Salter B (4/25/15). Exploring the impact of leaf width on VMAT treatment of spine SBRT [Abstract]. Journal of RadioSurgery and SBRT, 3(S1), 48.
  39. Huang L, Sarkar V, Suneja G, Rassiah P, Huang J, Zhao H, Szegedi M, Jensen R, Shrieve D, Salter B (4/25/15). Leaf width effect on VMAT for stereotactic radiosurgery (SRS) of cavernous sinus [Abstract]. Journal of RadioSurgery and SBRT, 3(S1), 53.
  40. Szegedi M, Zhao H, Rassiah P, Sarkar V, Huang J, Huang L, Tward J, Kokeny K, Salter BJ (4/1/2015). Clinical Comparison of 2D Transabdominal and 3D Transperineal Ultrasound Image Guidance Methods for Prostate RT [Abstract]. Radiotherapy and Oncology, 115, S494.
  41. Salter BJ, Szegedi M, Tward J, Zhao H, Sarkar V, Rassiah P, Huang L, Huang J (4/1/2015). 3D Transperineal Ultrasound Image Guidance Methods for Prostate SBRT Radiotherapy Treatment [Abstract]. Radiotherapy and Oncology, 115, S460.
  42. Sarkar V, Huang L, Rassiah-Szegedi P, Zhao H, Huang J, Szegedi M, Salter BJ (2015). Planning for mARC treatments with the Eclipse treatment planning system. J Appl Clin Med Phys, 16(2), 5351.
  43. Sarkar V, Wang B, Zhao H, Lynch B, James JA, McCullough KT, Salter BJ (2015). Percent depth-dose distribution discrepancies from very small volume ion chambers. J Appl Clin Med Phys, 16(2), 5230.
  44. Rassiah-Szegedi P, Szegedi M, Sarkar V, Streitmatter S, Huang YJ, Zhao H, Salter B (2014). Dosimetric impact of the 160 MLC on head and neck IMRT treatments. J Appl Clin Med Phys, 15(6), 4770.
  45. Salter BJ, Sarkar V, Huang L, Rassiah P, Zhao H, Huang J, Szegedi MW, Gaffney DK (9/1/14). Hybrid Modulated Arc Therapy (HMAT) on an Artiste Linac [Abstract]. International Journal of Radiation Oncology • Biology • Physics, 90(Supplement 1), S941.
  46. Salter BJ, Wang B, Sarkar V (08/01/2014). Stereotactic Treatment Planning. In Benedict SH, Schlesinger DJ, Goetsch SJ, Kavanagh BD (Eds.), Stereotactic Radiosurgery and Stereotactic Body Radiation Therapy (1, pp. 233-264). New York: Taylor and Francis Books, Inc.
  47. H Zhao, V Sarkar, P Rassiah-Szegedi, Y Huang, M Szegedi, L Huang, B Salter (07/01/14). Scanned Percent Depth Dose Curve Discrepancy for Photon Beams with Physical Wedge in Place (Varian IX) Using Different Sensitive Volume Ion Chambers [Abstract]. Med Phys, 41(6), 357.
  48. L Huang, V Sarkar, S Spiessens, P Rassiah-Szegedi, Y Huang, H Zhao, M Szegedi, B Salter (07/01/14). End to End Testing of a Prototype Eclipse Module for Planning Modulated Arc Therapy On the Siemens Platform [Abstract]. Med Phys, 41(6), 344.
  49. V Sarkar, B Wang, H Zhao, B Lynch, J James, K McCullough, P Rassiah-Szegedi, Y Huang, M Szegedi, L Huang, B Salter (07/01/2014). PDD Discrepancies at Opposite Biases From Very Small Volume Ion Chambers When Using Water Scanners [Abstract]. Med Phys, 41(6), 548-549.
  50. Huang J, Anker C, Sarkar V, Rassiah-Szegedi P, Zhao H, Szegedi M, Huang L, Salter BJ (3/1/2014). Skin Lesion Treatment Using High-Dose-Rate Brachytherapy with HAM Applicator: EQD2Gy Comparison with Electron Beam Radiotherapy [Abstract]. Brachytherapy, 13(Supplement 1), S45-S46.
  51. Zhao H, Wang B, Rassiah-Szegedi P, Huang Y, Sarkar V, Szegedi M, Salter BJ (7/1/13). Scanned Percent Depth Dose Curve Discrepancy for Varian TrueBeam Flattening-Filter-Free Photon Beams Using Very Small Sensitive Volume Ion Chamber [Abstract]. Med Phys, 40(6), 237.
  52. Salter BJ, Szegedi M, Wang B, Rassiah-Szegedi P, Zhao H, Huang J, Sarkar V, Tward J (7/1/13). Presentation of a New Intrafractional Prostate Monitoring Method with Ultrasound Image Guidance During Radiotherapy Treatment [Abstract]. Med Phys, 40(6), 375.
  53. Wang B, Sarkar V, Rassiah-Szegedi P, Zhao H, Huang Y, Szegedi M, Shrieve T, Tward JT, Salter BJ (7/1/13). Direct Clinical Comparison of 2D Versus 3D Transabdominal Ultrasound Image Guidance Methods for Prostate Radiotherapy Treatment [Abstract]. Med Phys, 40(6), 375.
  54. Szegedi M, Hinkle J, Rassiah P, Sarkar V, Wang B, Joshi S, Salter B (2013). Four-dimensional tissue deformation reconstruction (4D TDR) validation using a real tissue phantom. J Appl Clin Med Phys, 14(1), 4012.
  55. Salter BJSzegedi MWang BRassiahszegedi PZhao HHuang JSarkar VTward J (2013). SU‐E‐U‐08: Presentation of a New Intrafractional Prostate Monitoring Method with Ultrasound Image Guidance During Radiotherapy Treatment [Abstract]. Med Phys, 40(6), 375.
  56. Wang BSarkar VRassiahszegedi PZhao HHuang YSzegedi MShrieve TTward JTSalter BJ (2013). SU‐E‐U‐09: Direct Clinical Comparison of 2D Versus 3D Transabdominal Ultrasound Image Guidance Methods for Prostate Radiotherapy Treatment [Abstract]. Med Phys, 40(6), 375.
  57. Zhao HWang BRassiahszegedi PHuang YSarkar VSzegedi MSalter BJ (2013). SU‐E‐T‐145: Scanned Percent Depth Dose Curve Discrepancy for Varian TrueBeam Flattening‐Filter‐Free Photon Beams Using Very Small Sensitive Volume Ion Chamber [Abstract]. Med Phys, 40(6), 237.
  58. Wang B, Sarkar V, Anker CJ, Streitmatter S, Rassiah-Szegedi P, Zhao H, Huang JH, Szegedi M, Salter BJ (10/28/2012). Ultrasound Image Guidance For Abdominal Tumor [Abstract].
  59. Sarkar V, Wang B, Rassiah-Szegedi P, Zhao H, Huang JY, Szegedi MW, Hitchcock YJ, Kokeny KE, Salter BJ (10/28/2012). Dosimetric Implications Of Abdominal Compression For Lung SBRT Treatment [Abstract].
  60. Hullett CR, Gonzalez, VJ, Burt L, Rassiah-Szegedi P, Sarkar V, Tward JD, Hazard LJ, Huang YJ, Salter BJ, Gaffney DK (10/28/2012). Impact of BMI on daily setup variation with pelvic radiotherapy: Is prone positioning a "class solution"? [Abstract].
  61. Szegedi M, Rassiah-Szegedi P, Sarkar V, Hinkle J, Wang B, Huang YH, Zhao H, Joshi S, Salter BJ (2012). Tissue characterization using a phantom to validate four-dimensional tissue deformation. Med Phys, 39(10), 6065-70.
  62. Wang B, Sarkar V, Busselberg C, Rassiah-Szegedi P, Zhao H, Huang Y, Szegedi M, Salter BJ (2012). A Prototype Program for Analyzing 4D Image Guidance Shifts for Lung SBRT [Abstract]. Med Phys, 39(6).
  63. Zhao H, Wang B, Rassiah-Szegedi P, Sarkar V, Huang Y, Szegedi M, Gonzalez V, Salter BJ (2012). Comparison of CT-On-Rails and a 3D Surface Imaging System for Image Guided Pelvic Radiation Therapy for Both Supine and Prone Patient Positions [Abstract]. Med Phys, 39(6).
  64. Sarkar V, Wang B, Hinkle J, Gonzalez VJ, Hitchcock YJ, Rassiah-Szegedi P, Joshi S, Salter BJ (2012). Dosimetric evaluation of a "virtual" image-guidance alternative to explicit 6 degree of freedom robotic couch correction. Pract Radiat Oncol, 2(2), 122-37.
  65. Szegedi M, Sarkar V, Rassiah-Szegedi P, Wang B, Huang YJ, Zhao H, Salter B (2012). 4D CT image acquisition errors in SBRT of liver identified using correlation. J Appl Clin Med Phys, 13(1), 3564.
  66. Wang BSarkar VBusselberg CRassiahszegedi PZhao HHuang YSzegedi MSalter B (2012). SU‐E‐T‐404: A Prototype Program for Analyzing 4D Image Guidance Shifts for Lung SBRT [Abstract]. Med Phys, 39(6), 3797.
  67. Zhao HWang BRassiahszegedi PSarkar VHuang YSzegedi MGonzalez VSalter B (2012). SU‐E‐J‐60: Comparison of CT‐On‐Rails and a 3D Surface Imaging System for Image Guided Pelvic Radiation Therapy for Both Supine and Prone Patient Positions [Abstract]. Med Phys, 39(6), 3666.
  68. Hitchcock YJ, Sarkar V, Salter B, Shrieve DC (2011). CT On-Rails (CTOR) Characterization of Tumor Volume Rate-of-Reduction in Head Neck Squamous Cell Carcinoma Treated with IMRT Simultaneous Integrated Boost (IMRT-SIB) and Concurrent Chemotherapy [Abstract].
  69. Huang Y, Rassiah-Szegedi P, Wang B, Zhao H, Sarkar V, Szegedi M, Gaffney D, Salter BJ (2011). The Feasibility of Image-Guided MRI Pre-plan on HDR Syed Implants: A Case Study [Abstract].
  70. Wang B, Sadinski M, Sarkar V, Ruhnau S, Szegedi M, Anker C, Rassiah-Szegedi P, Zhao H, Huang Y, Salter BJ (July 2011). A Case Study of More Accurate Phase Re-Assignment for 4DCT Images [Abstract]. Med Phys, 38(6), 3553.
  71. Zhao H, Wang B, Rassiah-Szegedi P, Huang Y, Sarkar V, Szegedi M, Sadinski M, Kokeny K, Poppe M, Salter BJ (06/2011). Comparison of CT-On-Rails and 3D Surface Imaging System for Image Guided Partial Breast Radiation Therapy [Abstract]. Med Phys, 38(6), 3610.
  72. Rassiah-Szegedi P, Wang B, Szegedi M, Tward J, Zhao H, Huang YJ, Sarkar V, Shrieve D, Salter B (2011). Individualized margins for prostate patients using a wireless localization and tracking system. J Appl Clin Med Phys, 12(3), 3516.
  73. Wang B, Sarkar V, Rassiah-Szegedi P, Zhao H, Huang Y, Szegedi M, Shrieve DC, Salter BJ (2011). Evaluation of a novel combined-mode planning and delivery method for challenging stereotactic radiosurgery cases, The 10th Biennial Congress and Exhibition of International Stereotactic Radiosurgery Society [Abstract].
  74. Salter BJ, Wang B, Ruhnau S, Hinkle J, Joshi S, Sarkar V, Sadinski M, Hitchcock YJ, Kokeny KE, Shrieve DC (2011). Validation of Internal Target Volume (ITV) Consistency using 4DCT for Lung SBRT Treatments [Abstract].
  75. Salter BJ, Sarkar V, Wang B, Shukla H, Szegedi M, Rassiah-Szegedi P (2011). Rotational IMRT delivery using a digital linear accelerator in very high dose rate 'burst mode'. Phys Med Biol, 56(7), 1931-46.
  76. Sarkar V, Shi C, Papanikolaou N (2011). DART, a platform for the creation and registration of cone beam digital tomosynthesis datasets. Australas Phys Eng Sci Med, 34(1), 5-13.
  77. Wang B, Rassiah-Szegedi P, Zhao H, Huang YJ, Sarkar V, Szegedi M, Kokeny KE, Anker CJ, Shrieve DC, Salter BJ (2011). Initial experience and clinical comparison of two image guidance methods for SBRT treatment: 4DCT versus respiratory-triggered imaging. J Appl Clin Med Phys, 12(3), 3429.
  78. Zhao HWang BRassiahszegedi PHuang YSarkar VSzegedi MSadinski MKokeny KPoppe MSalter B (2011). SU‐E‐T‐527: Comparison of CT‐On‐Rails and a 3D Surface Imaging System for Image Guided Partial Breast Radiation Therapy [Abstract]. Med Phys, 38(6), 3610.
  79. Szegedi MHinkle JJoshi SSarkar VRassiahszegedi PWang BSalter B (2011). WE‐E‐BRC‐05: Voxel Based Four Dimensional Tissue Deformation Reconstruction (4DTDR) Validation Using a Real Tissue Phantom [Abstract]. Med Phys, 38(6), 3819.
  80. Salter BWang BSadinski MRuhnau SSarkar VHinkle JHitchcock YKokeny KJoshi S (2011). WE‐E‐BRC‐06: Comparison of Two Methods of Contouring Internal Target Volume on Multiple 4DCT Data Sets from the Same Subjects: Maximum Intensity Projection and Combination of 10 Phases [Abstract]. Med Phys, 38(6), 3820.
  81. Wang BSadinski MSarkar VRuhnau SSzegedi MAnker CRassiahszegedi PZhao HHuang YSalter B (2011). SU‐E‐T‐286: A Case Study of More Accurate Phase Re‐Assignment for 4DCT Images [Abstract]. Med Phys, 38(6), 3553.
  82. Salter BJ, Sarkar V, Wang B, Szegedi M, Rassiah-Szegedi P, Zhao H, Huang Y (10/31/2010). Presentation And Evaluation Of A Novel, Combined-mode Intensity-modulated-arc / Static-gantry-IMRT Planning And Delivery Method [Abstract].
  83. Wang B, Rassiah-Szegedi P, Zhao H, Huang Y, Sarkar V, Szegedi M, Jensen RL, Shrieve DC, Salter BJ (10/31/2010). Evaluation of Intrafractional Motion for Frameless Intracranial Treatments [Abstract].
  84. Rassiah-Szegedi P, Sarkar V, Wang B, Zhao H, Huang Y, Szegedi M, Salter BJ (10/31/2010). Treatment Planning Evaluation of a Novel Combined-Mode Intensity Modulated Arc / Static Gantry IMRT Delivery Approach for Hypo-Fractionated Treatment (SBRT/SRS) [Abstract].
  85. Zhao H, Wang B, Rassiah-Szegedi P, Huang Y, Sarkar V, Szegedi M, Salter BJ (July 2010). Comparison of Intrafractional Motion Between Supine and Prone Patient Positions During Radiation Therapy of Pelvic Malignancies Using a 3D Surface Imaging System [Abstract]. Med Phys, 37(6).
  86. Sarkar V, Rassiah-Szegedi P, Szegedi M, Wang B, Zhao H, Huang Y, Shukla H, Salter BJ (July 2010). Rotational IMRT Delivery Using a Siemens Artiste in Flattening-Filter-Free, High Dose-Rate Mode [Abstract]. Med Phys, 37(6).
  87. Salter B, Sarkar V, Ruhnau S, Rassiah-Szegedi P, Huang Y, Zhao H, Wang B, Szegedi M (July 2010). Increasing the Delivery Efficiency of IMRT DAO-Based Plans Through Segment Reordering [Abstract].
  88. Rassiah-Szegedi P, Szegedi M, Sarkar V, Zhao H, Wang B, Huang Y, Salter BJ (July 2010). Accuracy of the Collapsed Convolution Superposition Algorithm Without a Flattening Filter [Abstract]. Med Phys, 37(6).
  89. Sarkar V, Wang B, Rassiah-Szegedi P, Szegedi M, Huang Y, Zhao H, Salter BJ (July 2010). Impact of Varying the Number of Projection Images Used in Digital Tomosynthesis On the Effective Slice Thickness of the Tomograms [Abstract]. Med Phys, 37(6).
  90. Sarkar VRassiahszegedi PSzegedi MWang BZhao HHuang YShukla HSalter B (2010). SU‐GG‐T‐130: Rotational IMRT Delivery Using a Siemens Artiste in Flattening‐Filter‐Free, High Dose‐Rate Mode [Abstract]. Med Phys, 37(6), 3214.
  91. Salter BSarkar VRuhnau SRassiahszegedi PHuang YZhao HWang BSzegedi M (2010). SU‐GG‐T‐133: Increasing the Delivery Efficiency of IMRT DAO‐Based Plans through Segment Reordering [Abstract]. Med Phys, 37(6), 3215.
  92. Sarkar VWang BRassiahszegedi PSzegedi MHuang YZhao HSalter B (2010). SU‐GG‐I‐129: Impact of Varying the Number of Projection Images Used in Digital Tomosynthesis on the Effective Slice Thickness of the Tomograms [Abstract]. Med Phys, 37(6), 3131.
  93. Rassiahszegedi PSzegedi MSarkar VZhao HWang BHuang YSalter B (2010). SU‐GG‐T‐592: Accuracy of the Collapsed Convolution Superposition Algorithm without a Flattening Filter [Abstract]. Med Phys, 37(6), 3323.
  94. Zhao HWang BRassiahszegedi PHuang YSarkar VSzegedi MSalter B (2010). SU‐GG‐J‐26: Comparison of Intrafractional Motion between Supine and Prone Patient Positions during Radiation Therapy of Pelvic Malignancies Using a 3D Surface Imaging System [Abstract]. Med Phys, 37(6), 3150.
  95. Rassiah-Szegedi P, Szegedi M, Wang B, Sarkar V, Zhao H, Huang J, Salter B (2009). Characterization of Dosimetry and Efficiency with the Unflat 6MV Beam for 160 Leaf IMRT [Abstract].
  96. Sarkar V, Gutierrez AN, Stathakis S, Swanson GP, Papanikolaou N (2009). A virtual fluoroscopy system to verify seed positioning accuracy during prostate permanent seed implants. J BUON, 14(3), 447-50.
  97. Sarkar V, Shi C, Rassiah-Szegedi P, Diaz A, Eng T, Papanikolaou N (2009). The effect of a limited number of projections and reconstruction algorithms on the image quality of megavoltage digital tomosynthesis. J Appl Clin Med Phys, 10(3), 155-172.
  98. Sarkar V, Shi C, Papanikolaou N (2009). The effect of reconstruction algorithm and number of projection images used as input data on the final quality of megavoltage digital tomosynthesis datasets [Abstract].
  99. Salter BJ, Fuss M, Sarkar V, Wang B, Rassiah-Szegedi P, Papanikolaou N, Hollingshaus S, Shrieve DC (2009). Optimization of isocenter location for intensity modulated stereotactic treatment of small intracranial targets. Int J Radiat Oncol Biol Phys, 73(2), 546-55.
  100. Sarkar VShi CPapanikolaou N (2009). SU‐FF‐J‐86: A Digital Tomosynthesis Applications in Radiotherapy Toolkit [Abstract]. Med Phys, 36(6), 2495-2496.
  101. Sarkar VShi CPapanikolaou N (2009). SU‐FF‐T‐86: The Effect of Set‐Up Errors On the Final Target Dose Distribution in Step‐And‐Shoot IMRT Plans Compared to Helical Tomotherapy Plans [Abstract]. Med Phys, 36(6), 2539.
  102. Sarkar V, Shi C, Rassiah-Szegedi P, Eng T, Diaz A, Papanikolaou N (2009). A feasibility study on the use of digital tomosynthesis with individually-acquired megavoltage portal images for target localization. J BUON, 14(1), 103-8.
  103. Rizvi AA, Quraishi MI, Sarkar V, DuBois C, Biro S, Mulhall J (2009). The effect of pH and viscosity on bovine spermatozoa motility under controlled conditions. Int Urol Nephrol, 41(3), 523-30.
  104. Sarkar V, Stathakis S, Papanikolaou N (2008). A Monte Carlo model for independent dose verification in serial tomotherapy. Technol Cancer Res Treat, 7(5), 385-92.
  105. Sarkar V, Shi C, N Papanikolaou N (2008). The Effect of Number of Projections On the Accuracy of Volumetric Data Reconstructed Using Digital Tomosynthesis [Abstract].
  106. Sarkar V, Gutierrez A, Stathakis S, Swanson G, Papanikolaou N (2008). A Graphical User Interface for Virtual Fluoroscopy to Aid in Prostate Seed Implant Verification [Abstract].
  107. Salter B, Fuss M, Sarkar V, Wang B, Hollingshaus S, Papanikolaou N, Tobler M, Shrieve D (2008). Optimization of Isocenter Location for Intensity Modulated Stereotactic Treatment of Intracranial Targets [Abstract].
  108. Swanson G, Shi C, Mavroidis P, Stathakis S, Su F, Ramer R, Sarkar V, Ferreira B, Komisopoulos G, Giantsoudi D, Papanikolaou N (2008). Radiobiologically Quantified Treatment Setup Uncertainty Based on Megavoltage (MV) CT Imaging [Abstract].
  109. Salter BFuss MSarkar VWang BHollingshaus SPapanikolaou NTobler MShrieve D (2008). SU‐GG‐T‐435: Optimization of Isocenter Location for Intensity Modulated Stereotactic Treatment of Intracranial Targets [Abstract]. Med Phys, 35(6), 2825.
  110. Swanson GShi CMavroidis PStathakis Ssu FRamer RSarkar VFerreira BKomisopoulos GGiantsoudi DPapanikolaou N (2008). SU‐GG‐T‐425: Radiobiologically Quantified Treatment Setup Uncertainties Based On Megavoltage (MV) CT Imaging [Abstract]. Med Phys, 35(6), 2822.
  111. Sarkar VShi CPapanikolaou N (2008). SU‐GG‐I‐51: The Effect of Number of Projections On the Accuracy of Volumetric Data Reconstructed Using Digital Tomosynthesis [Abstract]. Med Phys, 35(6), 2654.
  112. Sarkar VGutirrez AStathakis SSwanson GPapanikolaou N (2008). SU‐GG‐J‐10: A Graphical User Interface for Virtual Fluoroscopy to Aid in Prostate Seed Implant Verification [Abstract]. Med Phys, 35(6), 2680.
  113. Sarkar V, Shi C, Rassiah P, Stathakis S, Papanikolaou N (2007). A study using a CCD-based electronic portal imaging device for digital tomosynthesis [Abstract].
  114. Stathakis S, Sarkar V, Rassiah-Szegedi P, Mavroidis P, Papanikolaou N (2007). Monte Carlo Based Dose Verification for Serial Tomotherapy [Abstract].
  115. Sarkar V, Lin L, Shi C, Papanikolaou N (2007). Quality assurance of the multileaf collimator with helical tomotherapy: design and implementation. Med Phys, 34(7), 2949-56.
  116. V Sarkar, S Stathakis, C Shi, P Rassiah, C Eller, C Esquivel, N Papanikolaou (06/04/2007). A Monte Carlo based independent dose verification platform for serial tomotherapy. In DA Jaffray, M Sharpe, J Van Dyk, J Bissonnette (Eds.), XVth International Conference on the Use of Computers in Radiation Therapy, Toronto, Canada: ICCR, 1, 303-307.
  117. Sarkar VShi CRassiahszegedi PStathakis SPapanikolaou N (2007). SU‐FF‐J‐47: A Feasibility Study Using a CCD‐Based EPID for Digital Tomosynthesis [Abstract]. Med Phys, 34(6), 2378-2379.
  118. Stathakis SSarkar VRassiahszegedi PMavroidis PPapanikolaou N (2007). SU‐FF‐T‐299: Monte Carlo Based Dose Verification for Serial Tomotherapy [Abstract]. Med Phys, 34(6), 2470.
  119. Shi CSarkar VLin LPapanikolaou N (2007). TU‐D‐M100F‐08: Quality Assurance Protocol of the HiArt Tomotherapy MLC: Design and Implementation [Abstract]. Med Phys, 34(6), 2561.