Residents, Fellows & Alumni

MacLellan and Walker Join Imaging Physics Residency Program

We welcome Christopher MacLellan Ph.D., and Christopher Walker, Ph.D., to the Imaging Physics Residency Program. Both MacLellan and Walker are recent graduates from our Medical Physics Graduate Program.

As a student in the Medical Physics program, MacLellan worked with Jason Stafford, Ph.D., on developing thermal dose models for MR guided ablation therapies. MacLellan joins Asher Ai, Ph.D., and Diana Carver, Ph.D. in our two-year clinical training program. 

Walker worked with Jim Bankson, Ph.D., in the Medical Physics program working on quantification of metabolism with hyperpolarized MRI. Walker joins Benton Pahlka, Ph.D., Samuel Fahrenholtz, Ph.D., and Samuel Einstein, Ph.D., in our residency hybrid pathway which allows for mentored, intensive biomedical imaging research training while completing clinical residency training. He will continue working with Bankson for his research during the three-year fellowship.

2016

• Steven Bache, M.S., Mission Health

2015

• Guang Li, Ph.D., Assistant Professor, University of Maryland, School of Medicine

2014

• Cristina Dodge, M.S., Physicist, Texas Children's Hospital
• Leland Page, Ph.D., Medical & Radiation Physics, Inc.

2013

• Nathan Busse, M.S., Diagnostic Medical Physicist, Colorado Associates in Medical Physics (CAMP)
• Shannon Fritz, Ph.D., Senior Physicist, Sutter Health

• Ching-Yi Hsieh, M.S., Research Associate, Wayne State University
• Travis Greene, M.S., Medical Physicist, Radiation Services, Inc.
• Wendy Siman, Ph.D., Graduate Research Assistant, MD Anderson

2011

• Andreea Dohatcu, Ph.D., Imaging Physicist, UT Medical Branch Galveston
• James Winslow, Ph.D., Medical Physicist, Duke University Medical Center

2010

• Nicholas Shkumat, M.S., Medical Physicist, The Hospital for Sick Children
• Alexander Pasciak, Ph.D., Medical Student, Johns Hopkins University School of Medicine

AAPM Imaging Physics Residency Fellowship

• 2011-2013 Nathan Busse, M.S.
• 2009-2011 Wendy Siman, M.S.
• 2003-2004 Anthony Liu, Ph.D.
• 2001-2003 Ishtiaq Hussain, M.S.

AAPM Summer School Travel Scholarship

• 2012 Ching-Yi Hsieh, M.S.

Dr. Arata Suzuki Capintec Travel Grant

• 2012 Ching-Yi Hsieh, M.S.

RSNA Diagnostic Physics Clinical Residency Fellowship

• 2006-2008 S. Cheenu Kappadath, Ph.D.

RSNA Research & Education Fund Support for Diagnostic Physics Clinical Residency Fellowship

• 2004-2006 Rachel Liu, Ph.D.
• 2002-2004 John Rong, Ph.D.
• 2000-2002 Kerry Krugh, Ph.D.

2014

Hsieh C, Gladish G, Willis C. Evaluation of a commercial cardiac motion phantom for dual-energy chest radiography. J Applied Clin Med Phys, Vol. 15, No 2 (2014)

Fritz S and Jones AK. Guidelines for anti-scatter grid use in pediatric digital radiography.Pediatr Radiol 44(3), 313-21 (2014)

Dohatcu A and Reeve D. Assessing the suitability of the ACR small MRI phantom for testing breast MRI coils. unpublished.

Winslow J and Kappadath SC. Performance characterization of the computed tomography automatic tube-current modulation software CareDose4D. Submitted to Med Phys.

Marsh RM, Shepard SJ, and Willis CE. The effect of exposure conditions on analysis of the EZ CR-DIN phantom. In preparation.

Liu HL, Geiser W, Willis CE. Evaluation of pre-patient filtration for computed radiography chest examinations using standard anthropomorphic phantoms. In preparation.

Greene T and Rong X. Evaluation of Techniques for Slice Sensitivity Profile Measurement and Analysis. J Applied Clin Med Phys, Vol. 15, No 2 (2014)

2013

Busse N, Erwin W and Pan T. Evaluation of a semiautomated lung mass calculation technique for internal dosimetry applications Med. Phys, Vol. 40(122503) 2013

2012

Siman W and Kappadath SC. Performance characteristics of a new pixelated portable gamma camera. Med. Phys. 39(6), 3435-3444 (2012)

2011

Siman W. Performance characteristics of a new pixelated portable gamma camera. J Nucl Med. 52 (Supplement 1):324 (2011).

Shkumat NA, Springer A, Walker CM, Rohren EM, Yang WT, Adrada BA, Arribas E, Carkaci S, Chuang HH, Santiago L, and Mawlawi OR. Investigating the limit of detectability of a positron emission mammography device: A phantom study. Med. Phys. 38, 5176-5185 (2011).

Pasciak A and Jones AK. Does "spreading" skin dose by rotating the C-arm during an intervention work? J Vasc Interv Radiol. 22(4), 443-52; quiz 453 (2011).

2010

Tchou PM, Haygood TM, Atkinson EN, Stephens TW, Davis PL, Arribas EM, Geiser WR, and Whitman GJ. Interpretation time of computer-aided detection at screening mammography. Radiology. 257(1), 40-46 (2010).

2009

Pasciak A, Erwin WD. Effect of voxel size and computation method on Tc-99m MAA SPECT/CT-based dose estimation for Y-90 microsphere therapy. Trans Med Imaging. 28(11), 1754-8 (2009).

Pasciak A and Jones AK. Nondestructive measurement of the grid ratio using a single image. Med. Phys. 36, 4720 (2009).

2007

Kappadath SC, Pan T, Erwin WD, Mawlawi O. Analysis of the dependence of PET/CT quantification on iterative reconstruction parameters. IEEE Medical Imaging Conference M26-220 (2007).

2006

Kappadath SC, Erwin WD, Wendt RE. Observed intercamera variability in clinically relevant performance characteristics for Siemens Symbia gamma cameras. J Applied Clin Med Phys 7(4):74-80 (2006).

Liu RR, Erwin WD. Automatic estimation of detector radial position for contoured SPECT acquisition using CT images on a SPECT/CT system. Med Phys 33(8):2800-8, (2006).

2005

Liu HL, Liu RR, Reeve DM, Shepard SJ, Willis CE.  Measurement of CT radiation profile width using CR imaging plates.  Med Phys 32(9):2881-2887 (2005).

2004

Cody DD, Moxley DM, Krugh KT, O’Daniel JC, Wagner LK, Eftekhari F.  “Strategies for formulating appropriate MDCT techniques when imaging the chest, abdomen, and pelvis in pediatric patients”  AJR 182:849-859 (2004).

2003

Rong XJ,  Krugh KT, Shepard SJ, and Geiser WR.  “Measurement of focal spot size with slit camera using computed radiography and flat-panel based digital detectors”  Med Phys 30(7):1768-1775 (2003).

2002

Shepard SJ, Thompson SK, Krugh KT, Venable S, and Munden R, “Design and implementation of a robust high-availability DICOM print network in a large multimodality clinical environment,”  Proc. SPIE 4685, 263-269 (2002).

Thompson SK, Willis CE, Krugh KT, Shepard SJ, and McEnery KW, “Implementing the DICOM Grayscale Standard Display Function for Mixed Hard- and Soft-Copy Operations,” J Digit Imaging 15 Suppl 1:27-32 (2002).

Rong XJ, Shaw CC, Johnston DA, Lemacks MR, Liu X, Whitman GJ, Dryden MJ, Stephens TW, Thompson SK, Krugh KT, Lai CJ.  “Microcalcification detectability for four mammographic detectors: flat-panel, CCD, CR, and screen/film”. Med Phys 29(9):2052-61 (2002).

2001

Rong JX, Shaw CC, Johnston DA, Lemacks MR, Liu X, Whitman GJ, Thompson SK, Krugh K,  “Comparison of a-Si:H CsI flat-panel digital imaging systems with a CCD-based system, CR systems, and conventional screen-film systems – A contrast-detail phantom study,”  Proc. SPIE 4320, 381-388 (2001).

Krugh KT, Cody DD, Thompson SK, “Z-axis high-contrast resolution for multi- vs. single-slice CT,”  Proc. SPIE 4320, 744-753 (2001).

2014

Page L, Dodge C, Li G and Wendt R. Measurement of Exposure to Personnel Performing Shielding Evaluations. Poster Southwest Regional Chapter of American Association of Physicists in Medicine in San Antonio, TX April 2014.

Dodge C and Gress D. Improving the efficiency of CTDIw annual measurements with established 16 cm:32 cm phantom ratios. Poster Southwest Regional Chapter of American Association of Physicists in Medicine in San Antonio, TX April 2014.

2013

Dodge C and Rong J. CT Model-Based Iterative Reconstruction: How Much Dose Can We Save? Presentation TU-C-103-9 American Association of Physicists in Medicine 55th Annual Meeting in Indiana, ID. August 6, 2013.

Juneja V, Busse N and Jones A. A Methodology to Estimate Radiation Dose Reported On a Personal Radiation Monitor. Presentation TU-A-116-8 American Association of Physicists in Medicine 55th Annual Meeting in Indiana, ID. August 6, 2013.

Busse N, Page L, Hou P and Reeve D. Effects of Normalization, Filtration, and Distortion Correction Options On MRI ACR Phantom Images. Poster SU-E-I-67 American Association of Physicists in Medicine 55th Annual Meeting in Indiana, ID. August 4, 2013.

Page L, Kundra V and Rong J. Investigation of Rental CT Dose Reduction by Using Model Based Iterative Reconstruction. Poster SU-E-I-36 American Association of Physicists in Medicine 55th Annual Meeting in Indiana, ID. August 4, 2013.

Page, L, Tomakin, G., Jones A., Impact of Protocol Change in the Cardiac Cath Lab. Poster PO-BPC-10, American Association of Physicists in Medicine Spring Clinical Meeting in Phoenix, AZ March 16, 2013.

2012

Hsieh C, Stafford J and Reeve D. Phase Imaging Measurement of Static Magnetic Field Homogeneity. Presentation WE-G-217A-9 American Association of Physicists in Medicine 54th Annual Meeting in Charlotte, NC. August 1, 2012.

Busse N, Erwin W, and Pan T. Evaluation of a CT-Based, Semi-Automated Lung Mass Estimation Method Under Varying Acquisition Conditions. Presentation SU-C-218-6. American Association of Physicists in Medicine 54th Annual Meeting in Charlotte, NC. July 29, 2012.

Green T, Nishino T, and Willis CE. Independent Implementation of AAPM TG-150 Draft Image Receptor Test Recommendations. Poster SU-E-I-102. American Association of Physicists in Medicine 54th Annual Meeting in Charlotte, NC. July 29, 2012.

Fritz S and Jones A. Quantifying patient thickness for which an anti-scatter grid is unnecessary for digital radiographic abdomen exams. Presentation TU-A-218-7. American Association of Physicists in Medicine 54th Annual Meeting in Charlotte, NC. July 31, 2012.

Rong X and Greene T. Evaluation of Techniques for Slice Sensitivity Profile Measurement and Analysis. Young Investigator Clinical Symposium. 2012 AAPM Spring Clinical Meeting, Dallas, TX. March 19, 2012.

Hsieh C and Willis C. Evaluation of Commercial Cardiac Motion Phantom for Dual Energy Chest Radiology. Young Investigator Clinical Symposium. 2012 AAPM Spring Clinical Meeting, Dallas, TX. March 19, 2012.

2011

Winslow J and Kappadath S. Image Quality and Patient Dose Dependence on CT Scan Parameters for ATCM (CareDose4D). Poster SU‐E‐I‐14. Joint AAPM/COMP Meeting in Vancouver, BC. Med Phys 38, 3398, 2011.

Walker C, Springer A, Shkumat N, and Mawlawi O. Variation in Lesion Detectability of a Positron Emission Mammography (PEM) System as a Function of Breast Thickness. Poster SU‐E‐I‐183. Joint AAPM/COMP Meeting in Vancouver, BC. Med Phys 38, 3438, 2011.

Greene T, Stafford R, and Reeve D. Automated Analysis of MRI Radio Frequency Coil Performance. Poster SU‐E‐I‐120. Joint AAPM/COMP Meeting in Vancouver, BC.  Med Phys 38, 3423, 2011.

Hsieh C, Cheng Y, Stafford R, and Haacke E. Quantifying Magnetic Susceptibility of veneous blood by the Complex Sum Method in MRI. Presentation MO-F-211-7. Joint AAPM/COMP Meeting in Vancouver, BC. Med Phys 38, 3731, 2011.

Siman W, Kappadath SC, Rong, J. Weekly Exposure Contributions from Radioactive Patients in A Busy Comprehensive Imaging Center. Poster SU‐E‐I‐64. Joint AAPM/COMP Meeting in Vancouver, BC. Med Phys 38, 3410, 2011.

Kappadath SC and Siman W. Performance Evaluation of a New Commercially Available Portable Pixelated Gamma Camera for 99mTc‐Scintimammography. Poster SU‐E‐I‐151.  Joint AAPM/COMP Meeting in Vancouver, BC. Med Phys 38, 3431, 2011.

Hsieh C, Cheng N, Stafford RJ and Haacke EM. The Complex Sum Method for quantifying magnetic susceptibility and moments of venous blood in MRI. SWAAPM Meeting. Dallas, TX. 2011.

2010

Winslow J and Kappadath S. Effect of CT Scan Parameters on Adult and Pediatric CT Dose When Using Automatic Tube Current Modulation. Poster SU‐GG‐I‐04. American Association of Physicists in Medicine 52nd Annual Meeting, Philadelphia, PA. Med Phys 37, 3102, 2010.

Dohatcu A, Ionita C, Sherman J, Bednarek D, Hoffmann K, Rudin S. Parameterization of Time-Density Curves (TDC) and Regional-TDCs to Quantify Flow Modification Inside Aneurysms Treated with Flow-Modifying Devices (FMD) Following Endovascular Image-Guided Interventions. Presentation SU-GG-I-183. American Association of Physicists in Medicine 52nd Annual Meeting, Philadelphia, PA. Med Phys 37, 3143, 2010.

Dohatcu A, Bednarek A. A Method to Evaluate the Effect of Automatic Brightness Control Tracking On Image Quality and Patient Dose for Interventional Fluoroscopic Systems.  Presentation MO-E-204B-9. American Association of Physicists in Medicine 52nd Annual Meeting, Philadelphia, PA. Med Phys 37, 3360, 2010.

N. Shkumat and O. Mawlawi, Investigating the detectability performance of a positron emission mammography system: a phantom study. Oral Presentation, International Society of Nuclear Medicine Annual Meeting, Salt Lake City UT (2010).

2009

Pasciak A and Wang J. Assessment of Inter and Intra‐Scanner Variation in Diffusion Tensor Imaging Using the ACR Phantom. Poster SU‐FF‐I‐125. American Association of Physicists in Medicine 51st Annual Meeting, Anaheim, CA. Med Phys 36, 2463, 2009.

Pasciak A and Jones A. Non-Destructive Grid Ratio Measurement. Poster SU-FF-I-161. American Association of Physicists in Medicine 51st Annual Meeting, Anaheim, CA. Med Phys 36, 2472, 2009.

N. Shkumat and O. Mawlawi, Development of a novel multi-modality positron emission mammography phantom. Oral Presentation, AAPM South-West Chapter, San Antonio TX (2009).

N. Shkumat and O. Mawlawi, Investigating the detectability limits of a PEM system. Oral Presentation, International Society of Nuclear Medicine Annual Meeting, Toronto ON (2009).

2008

Tonkopi E, Chi PM, Mawlawi O, Riegel AC, Rohren EM, Macapinlac HA and Pan T. Average CT in colorectal cancer PET studies. Poster SU-GG-II-136, American Association of Physicists in Medicine 50th Annual Meeting, Houston, TX. Med Phys 35(6):2673, 2008.

Willis C, Marsh R, Polman R, Shepard S. Discrepancies in Exposure Conditions for the EZ CR-DIN Phantom.  Poster SU-GG-I-75, American Association of Physicists in Medicine 50th Annual Meeting, Houston, TX. Med Phys 35(6): 2659, 2008.

Marsh R, Stafford R, and Reeve D. Potential Sources of Variation in Quantitative Ultrasound Quality Control Measurements. Poster SU-GG-I-156, American Association of Physicists in Medicine 50th Annual Meeting, Houston, TX. Med Phys 35(6): 2677, 2008.

2007

Kappadath S, Erwin WD, and Wendt RE. A novel method to evaluate gamma camera rotational uniformity and sensitivity variation. J Nucl Med 48(5 Suppl 2):162P, 2007.

Tonkopi E, Mawlawi O, Chi PM, Yeung H, Macapinlac HA and Pan T “Effect of average CT on quantifying PET images of colorectal cancer metastasis in the liver”, Supplement to the Journal of Nuclear Medicine, Abstract Book, V 48, p. 411P, 2007.

Tonkopi E, Mawlawi O, Chi PM, Yeung H, Macapinlac HA and Pan T. Effect of average CT on quantifying PET imaging in esophageal cancer, Poster SU-FF-I-99. American Association of Physicists in Medicine 49th Annual Meeting, Minneapolis, MN. Med Phys 34:2361, 2007.

2006

Devaraju, V and Willis, C. Variation in Dual-Energy Chest Radiography Among Systems Using Identical Digital Flat Panel Detectors. Moderated Poster TU-FF-A4-6 American Association of Physicists in Medicine 48th Annual Meeting, Orlando, FL. Med Phys 33(6):2223 (2006).

Kappadath S, Erwin W, Wendt R III. Observed inter-camera variablity of clinically relevant performance characteristics for Siemens Symbia Gamma cameras. Poster SU-FF-I-76. American Association of Physicists in Medicine 48th Annual Meeting, Orlando, FL. Med Phys 33(6):2014 (2006).

Erwin W, Kappadath S, Devaraju V, and Wendt R. Performance characterization of a new SPECT-CT scanner for imaging Tc-99m and In-111. J Nucl Med 47(5 Suppl 1):405, 2006.

2005

Erwin WD, Liu RR. An automated, CT image-based algorithm for non-circular orbit (NCO) SPECT detector radial position estimation on a SPECT-CT imaging system. Poster SNM Annual Meeting. J Nucl Med 46(5 Suppl 2):465P, 2005.

Liu RR and Erwin WD. 3D Cone-beam ROI CT Image Reconstruction Using an Angiography C-arm Unit. Oral presentation. SWAAPM, San Antonio, TX (2005).

Klein E, Clark B, Lane R, Mihailidis D, Krugh K, Esthappan J,  “Educational Council Symposium on Residency Programs”  American Association of Physicists in Medicine 47th Annual Meeting Seattle, WA.  Med Phys 32(6):1888-1889 (2005).

Liu HL, Geiser W, Willis CE.  Effects of prepatient filtration on contrast, scatter and dose in CR chest exams: A phantom study. Poster SU-FF-I-58 American Association of Physicists in Medicine 47th Annual Meeting Seattle, WA.  Med Phys 32(6):1917 (2005).

Liu RR and Stevens D. A Simple and Effective Method to Determine Clinical Significance of CT Ring Artifacts. Presentation MO-D-I-611-2 American Association of Physicists in Medicine 47th Annual Meeting Seattle, WA. Med Phys 32(6) (2005).

2004

Liu HL. Department of Imaging Physics, U.T. M. D. Anderson Cancer Center, Houston, TX, USA.  Effects of Pre-patient Filtration on Contrast, Scatter and Dose in CR Chest Exams: A Phantom Study.  Oct. 21, 2004.

Liu R, Erwin W. CT-based Estimation of SPECT Radial Position on a Hybrid SPECT-CT Imaging System. TH-C-315-06. American Association of Physicists in Medicine 46th Annual Meeting Pittsburgh, PA. Med Phys 31(6):1840 (2004).

2003

Hussain I and Shepard S. Performance Evaluation of a Prototype Dry Laser Image Printer Poster SU-FF-PDS-97. American Association of Physicists in Medicine 45th Annual Meeting San Diego, CA.  Med Phys 30(6):1344 (2003).

Hussain I and Jackson E. “Quality Control Measures for Clinical Fast and Ultra Fast MRI Pulse Sequences”, 89th Annual Meeting of the Radiological Society of North America, Abstract M19-1171, Dec 3, 2003.

2002

Rong J, Krugh KT, Shepard S, and Geiser W: Measurement of focal spot size with slit camera using computed radiography and flat-panel based digital detectors.  TH-C-518-10 American Association of Physicists in Medicine 44th Annual Meeting, Montreal, Quebec, Canada. Med Phys 29 (6):1374 (2002).

Hussain I, Liu X, and Shaw C. CNR and Exposure Measurements with an aSi:h/CsI(Tl) Flat panel based digital chest system using LucAl Chest Phantom. SU-66-WIP-EXH-08 Works in Progress. American Association of Physicists in Medicine 44th Annual Meeting, Montreal, Quebec, Canada. Med Phys 29(8):1936-1937 (2002).

Mawlawi O, Macapinlac H, Erasmus JJ, Krugh K, Cody D, Forster K, and Chasen M, “Transformation of CT Numbers to PET Attenuation Factors in the Presence of Iodinated IV Contrast”  EJNM 8(29):S108 (2002).

2001

Krugh KT, Cody DD, Milman RJ, Wagner LK, F. Eftekhari E. Radiation Skin Doses for Pediatric and Adult Patients in Multi-slice CT: A Comparative Study Using Anthropomorphic Phantoms and a Novel Dosimetry System. RSNA 2001 Supplement to Radiology 221(P):366 (2001).

Krugh KT, Thompson SK, Shepard SJ. Analytical method to convert Fuji CR processing parameters for use with the DICOM grayscale standard display function. American Association of Physicists in Medicine 43rd Annual Meeting, Salt Lake City, UT Med. Phys. 28(6):1248 (2001).

Shepard SJ, Thompson SK, Krugh KT, Venable S, Munden R. Design and implementation of a robust, high-availability DICOM print network in a large, multi-modality clinical environment. American Association of Physicists in Medicine 43rd Annual Meeting, Salt Lake City, UT Med. Phys. 28(6):1248 (2001).

J. Rong, C.C. Shaw, D.A. Johnston, M.R. Lemacks, X. Liu, G.J. Whitman, T. Stephens, M. Dryden, S.K. Thompson, K. Krugh,  Microcalcification detectability for four mammographic detectors: flat-panel, CCD, CR and screen/film.  American Association of Physicists in Medicine 43rd Annual Meeting, Salt Lake City, UT Med Phys 28(8):1821 (2001).

K.T. Krugh, D.D. Cody, S.K. Thompson,  “Multi- vs. single-slice CT: A look at z-axis resolution,” Presented at the Southwest Regional Chapter of the American Association of Physicists in Medicine (SWAAPM) Spring Meeting, Galveston, Texas, April 6-7, 2001.