John DeMarco, Ph.D.


Work Titles
UCLA Associate Professor, Radiation Oncology Member, JCCC Patients and Survivors Program Area Member, Physics & Biology in Medicine GPB Home Area
Education:
Degrees:
Ph.D., UCLA
B.S., The Pennsylvania State University

Contact Information:

Email Address:

jdemarco@mednet.ucla.edu


Office Phone Number:

(310) 206-1554

Work Address:

200 UCLA Medical Plaza, Suite B265
Campus - 695124
CA


Publications:

A selected list of publications:

Zhang Di, Cagnon Chris H, Villablanca J Pablo, McCollough Cynthia H, Cody Dianna D, Zankl Maria, Demarco John J, McNitt-Gray Michael F   Estimating peak skin and eye lens dose from neuroperfusion examinations: Use of Monte Carlo based simulations and comparisons to CTDIvol, AAPM Report No. 111, and ImPACT dosimetry tool values Medical physics, 2013; 40(9): 091901.
Qi X Sharon, Hu Angie Y, Lee Steve P, Lee Percy, DeMarco John, Li X Allen, Steinberg Michael L, Kupelian Patrick, Low Daniel   Assessment of interfraction patient setup for head-and-neck cancer intensity modulated radiation therapy using multiple computed tomography-based image guidance International journal of radiation oncology, biology, physics, 2013; 86(3): 432-9.
Lee Percy, Eppinga Wietse, Lagerwaard Frank, Cloughesy Timothy, Slotman Benjamin, Nghiemphu Phioanh L, Wang Pin-Chieh, Kupelian Patrick, Agazaryan Nzhde, Demarco John, Selch Michael T, Steinberg Michael, Kang Jung Julie   Evaluation of high ipsilateral subventricular zone radiation therapy dose in glioblastoma: a pooled analysis International journal of radiation oncology, biology, physics, 2013; 86(4): 609-15.
Kamrava Mitchell, Chung Melody P, Demarco John, Kayode Oluwatosin, Park Sang-June, Borja Lalaine, Chow Lucy, Lee Steve P, Steinberg Michael L, Demanes D Jeffrey   Electronic brachytherapy for postsurgical adjuvant vaginal cuff irradiation therapy in endometrial and cervical cancer: a retrospective study Brachytherapy, 2013; 12(2): 141-7.
Khatonabadi Maryam, Kim Hyun J, Lu Peiyun, McMillan Kyle L, Cagnon Chris H, DeMarco John J, McNitt-Gray Michael F   The feasibility of a regional CTDIvol to estimate organ dose from tube current modulated CT exams Medical physics, 2013; 40(5): 051903.
White Evan C, Kamrava Mitchell R, Demarco John, Park Sang-June, Wang Pin-Chieh, Kayode Oluwatosin, Steinberg Michael L, Demanes D Jeffrey   High-dose-rate prostate brachytherapy consistently results in high quality dosimetry International journal of radiation oncology, biology, physics, 2013; 85(2): 543-8.
Khatonabadi Maryam, Zhang Di, Mathieu Kelsey, Kim Hyun J, Lu Peiyun, Cody Dianna, Demarco John J, Cagnon Chris H, McNitt-Gray Michael F   A comparison of methods to estimate organ doses in CT when utilizing approximations to the tube current modulation function Medical physics, 2012; 39(8): 5212-28.
Zumsteg Zachary, DeMarco John, Lee Steve P, Steinberg Michael L, Lin Chun Shu, McBride William, Lin Kevin, Wang Pin-Chieh, Kupelian Patrick, Lee Percy   Image guidance during head-and-neck cancer radiation therapy: analysis of alignment trends with in-room cone-beam computed tomography scans International journal of radiation oncology, biology, physics, 2012; 83(2): 712-9.
Zhang Di, Cagnon Chris H, Villablanca J Pablo, McCollough Cynthia H, Cody Dianna D, Stevens Donna M, Zankl Maria, Demarco John J, Turner Adam C, Khatonabadi Maryam, McNitt-Gray Michael F   Peak skin and eye lens radiation dose from brain perfusion CT based on Monte Carlo simulation AJR. American journal of roentgenology, 2012; 198(2): 412-7.
Kachikwu Evelyn L, Iwamoto Keisuke S, Liao Yu-Pei, DeMarco John J, Agazaryan Nzhde, Economou James S, McBride William H, Schaue Dörthe   Radiation enhances regulatory T cell representation International journal of radiation oncology, biology, physics, 2011; 81(4): 1128-35.
Turner Adam C, Zhang Di, Khatonabadi Maryam, Zankl Maria, DeMarco John J, Cagnon Chris H, Cody Dianna D, Stevens Donna M, McCollough Cynthia H, McNitt-Gray Michael F   The feasibility of patient size-corrected, scanner-independent organ dose estimates for abdominal CT exams Medical physics, 2011; 38(2): 820-9.
Oliver Scott C N, Leu Min Y, DeMarco John J, Chow Philip E, Lee Steve P, McCannel Tara A   Attenuation of iodine 125 radiation with vitreous substitutes in the treatment of uveal melanoma Archives of ophthalmology, 2010; 128(7): 888-93.
Turner Adam C, Zankl Maria, DeMarco John J, Cagnon Chris H, Zhang Di, Angel Erin, Cody Dianna D, Stevens Donna M, McCollough Cynthia H, McNitt-Gray Michael F   The feasibility of a scanner-independent technique to estimate organ dose from MDCT scans: using CTDIvol to account for differences between scanners Medical physics, 2010; 37(4): 1816-25.
Evers Patrick, Lee Percy P, DeMarco John, Agazaryan Nzhde, Sayre James W, Selch Michael, Pajonk Frank   Irradiation of the potential cancer stem cell niches in the adult brain improves progression-free survival of patients with malignant glioma BMC cancer, 2010; 10(2): 384.
Selch Michael T, Lin Kevin, Agazaryan Nzhde, Tenn Steve, Gorgulho Alessandra, DeMarco John J, DeSalles Antonio A F   Initial clinical experience with image-guided linear accelerator-based spinal radiosurgery for treatment of benign nerve sheath tumors Surgical neurology, 2009; 72(6): 668-74; discussion 674-5.
Zhang Di, Zankl Maria, DeMarco John J, Cagnon Chris H, Angel Erin, Turner Adam C, McNitt-Gray Michael F   Reducing radiation dose to selected organs by selecting the tube start angle in MDCT helical scans: a Monte Carlo based study Medical physics, 2009; 36(12): 5654-64.
Angel Erin, Yaghmai Nazanin, Jude Cecilia Matilda, DeMarco John J, Cagnon Christopher H, Goldin Jonathan G, McCollough Cynthia H, Primak Andrew N, Cody Dianna D, Stevens Donna M, McNitt-Gray Michael F   Dose to radiosensitive organs during routine chest CT: effects of tube current modulation AJR. American journal of roentgenology, 2009; 193(5): 1340-5.
Angel, Yaghmai, Jude, Demarco, Cagnon, Goldin, Primak, Stevens, Cody, McCollough, McNitt-Gray   Monte Carlo simulations to assess the effects of tube current modulation on breast dose for multidetector CT Physics in medicine and biology, 2009; 54(3): 497-512.
Angel Erin, Wellnitz Clinton V, Goodsitt Mitchell M, Yaghmai Nazanin, DeMarco John J, Cagnon Christopher H, Sayre James W, Cody Dianna D, Stevens Donna M, Primak Andrew N, McCollough Cynthia H, McNitt-Gray Michael F   Radiation dose to the fetus for pregnant patients undergoing multidetector CT imaging: Monte Carlo simulations estimating fetal dose for a range of gestational age and patient size Radiology, 2008; 249(1): 220-7.
Kesner Adam L, Lau Victoria K, Speiser Michael, Hsueh Wei-Ann, Agazaryan Nzhde, DeMarco John J, Czernin Johannes, Silverman Daniel H S   Time-course of effects of external beam radiation on [18F]FDG uptake in healthy tissue and bone marrow Journal of applied clinical medical physics / American College of Medical Physics, 2008; 9(3): 2747.
Bassler Niels, Alsner Jan, Beyer Gerd, DeMarco John J, Doser Michael, Hajdukovic Dragan, Hartley Oliver, Iwamoto Keisuke S, Jäkel Oliver, Knudsen Helge V, Kovacevic Sandra, Møller Søren Pape, Overgaard Jens, Petersen Jørgen B, Solberg Timothy D, Sørensen Brita S, Vranjes Sanja, Wouters Bradly G, Holzscheiter Michael H   Antiproton radiotherapy Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology, 2008; 86(1): 14-9.
Chetty Indrin J, Curran Bruce, Cygler Joanna E, DeMarco John J, Ezzell Gary, Faddegon Bruce A, Kawrakow Iwan, Keall Paul J, Liu Helen, Ma C M Charlie, Rogers D W O, Seuntjens Jan, Sheikh-Bagheri Daryoush, Siebers Jeffrey V   Report of the AAPM Task Group No. 105: Issues associated with clinical implementation of Monte Carlo-based photon and electron external beam treatment planning Medical physics, 2007; 34(12): 4818-53.
Lin Kevin, Lee Steve P, Cho Jennifer S, Reiter Robert E, DeMarco John J, Solberg Timothy D   Improvements in prostate brachytherapy dosimetry due to seed stranding Brachytherapy, 2007; 6(1): 44-8.
DeMarco J J, Cagnon C H, Cody D D, Stevens D M, McCollough C H, Zankl M, Angel E, McNitt-Gray M F   Estimating radiation doses from multidetector CT using Monte Carlo simulations: effects of different size voxelized patient models on magnitudes of organ and effective dose Physics in medicine and biology, 2007; 52(9): 2583-97.
Holzscheiter Michael H, Bassler Niels, Agazaryan Nzhde, Beyer Gerd, Blackmore Ewart, DeMarco John J, Doser Michael, Durand Ralph E, Hartley Oliver, Iwamoto Keisuke S, Knudsen Helge V, Landua Rolf, Maggiore Carl, McBride William H, Møller Søren Pape, Petersen Jørgen, Skarsgard Lloyd D, Smathers James B, Solberg Timothy D, Uggerhøj Ulrik I, Vranjes Sanja, Withers H Rodney, Wong Michelle, Wouters Bradly G   The biological effectiveness of antiproton irradiation Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology, 2006; 81(3): 233-42.
DeMarco J J, Cagnon C H, Cody D D, Stevens D M, McCollough C H, O'Daniel J, McNitt-Gray M F   A Monte Carlo based method to estimate radiation dose from multidetector CT (MDCT): cylindrical and anthropomorphic phantoms Physics in medicine and biology, 2005; 50(17): 3989-4004.
DeMarco John J, Solberg Timothy D, Agazaryan Nzhde   A seed specific dose kernel method for low-energy brachytherapy dosimetry Journal of applied clinical medical physics / American College of Medical Physics, 2003; 4(1): 66-74.
Agazaryan Nzhde, Solberg Timothy D, DeMarco John J   Patient specific quality assurance for the delivery of intensity modulated radiotherapy Journal of applied clinical medical physics / American College of Medical Physics, 2003; 4(1): 40-50.
Aaronson Randi F, DeMarco John J, Chetty Indrin J, Solberg Timothy D   A Monte Carlo based phase space model for quality assurance of intensity modulated radiotherapy incorporating leaf specific characteristics Medical physics, 2002; 29(12): 2952-8.
DeMarco John J, Hugo Geoff, Solberg Timothy D   Dosimetric parameters for three low-energy brachytherapy sources using the Monte Carlo N-particle code Medical physics, 2002; 29(5): 662-8.
Demarco John J, Wallace Robert E, Boedeker Kirsten   An analysis of MCNP cross-sections and tally methods for low-energy photon emitters Physics in medicine and biology, 2002; 47(8): 1321-32.
Solberg Timothy D, DeMarco John J, Hugo Geoffrey, Wallace Robert E   Dosimetric parameters of three new solid core I-125 brachytherapy sources Journal of applied clinical medical physics / American College of Medical Physics, 2002; 3(2): 119-34.

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