Clara Ferreira, PhD

Assistant Professor, Department of Radiation Oncology

Clara Ferreira

Contact Info

Office Address:
Department of Radiation Oncology
Phillips-Wangensteen Building, Floor 1
516 Delaware Street SE
Minneapolis MN, 55455

Mailing Address:
Department of Radiation Oncology
MMC 494 Mayo
8494A (Campus Delivery Code)
420 Delaware St SE
Minneapolis, MN 55455

Administrative Assistant Name
Tess Behrens

Administrative Email

Residency, University of Oklahoma (Medical Physics)

PhD, East Carolina University, North Carolina (2013)

MS, Federal University of Minas Gerais, Brazil (2007)

MS, East Carolina University, North Carolina (2013)

BS, Federal University of Minas Gerais, Brazil (2005)


Dr. Ferreira has clinical interests in Brachytherapy treatments for skin, uveal melanomas, and brain tumors. She has a special interest in developing personalized radiation therapy approaches to cancer treatment. Most recently, she was part of a multi-disciplinary team who was the first in the U.S. to offer the clinical use of GammaTile brachytherapy outside of a clinical trial. Her research focuses on finding solutions to improve Brachytherapy treatments and to find treatments that have the potential to improve clinical outcomes.

Dr. Ferreira is an Assistant Professor and Medical Physicist in the Department of Radiation Oncology. She received her Doctoral degree in Medical Physics from East Carolina University, and completed her residency training at the University of Oklahoma. In addition to lecturing graduate students and radiation oncology medical residents, Dr. Ferreira provides mentoring to students who want to gain experience both in the clinical and scientific realms.

Professional Associations

Member, American Brachytherapy Society (ABS)

Member, American Association of Physicists in Medicine (AAPM)

Member, American Society for Radiation Oncology (ASTRO)


Research Summary/Interests

  • Eye Plaque Brachytherapy
  • GammaTile Permanent Brachytherapy for brain tumors
  • Superficial Brachytherapy for skin cancer
  • MRI guided Brachytherapy
  • Customized high-dose-rate Brachytherapy devices


Oare, C., Sun, S., Dusenbery, K., Reynolds, M., Koozekanani, D., Gerbi, B., Ferreira, C. Analysis of dose to the macula, optic disc, and lens in relation to vision toxicities - A retrospective study using COMS eye plaques. Physica Medicadoi:  10.1016/j.ejmp.2022.08.001

Gessler, D. J., Neil, E. C., Shah, R., Levine, J., Shanks, J., Wilke, C., Reynolds, M., Zhang, S., Özütemiz, C., Gencturk, M., Folkertsma, M., Bell, W. E., Chen, L., Ferreira, C., Dusenbery, K., Chen, C. C. GammaTile brachytherapy in the treatment of recurrent glioblastomas. Neuro-oncology Advances, 4(1), vdab185. doi:  10.1093/noajnl/vdab185

Easwaran, T. P., Sterling, D., Ferreira, C., Sloan, L., Wilke, C., Neil, E., Shah, R., Chen, C. C., Dusenbery, K. E. Rapid Interval Recurrence of Glioblastoma Following Gross Total Resection: A Possible Indication for GammaTile Brachytherapy. Cureus, 13(11), e19496. doi:  10.7759/cureus.19496

Ferreira C, Sterling D, Dusenbery K, Reynolds M, Chen C, Alaei P. Commissioning and Clinical Aspects of First Commercial Implementation of Cs-131 GammaTile Permanent Brain Implants. Brachytherapy, 20 (2021), 673-685.

Oare CC, Deufel CL, Cutsinger JM, Herman TDLF, Ferreira C. On the importance of quality assurance (QA) for COMS eye plaque Silastic inserts: A guide to measurement methods, typical variations, and an example of how QA intercepted a manufacturing aberration. Journal of Applied Clinical Medical Physics, 2021, 00:1-11.

Patel, K., Ferreira, C., Chen, C., Reynolds, M., Dusenbery, K., Cs-131 Intracavitary Brachytherapy as an Adjunct to Maximal Safe Resection for Locally Recurrent High-Grade Glioma. International Journal of Radiation Oncology, Biology & Physics, 2020, 109(3), E670-E671.

Herrington J, Ferreira C, Yong Chen, Ahmad S. Neutron radiation effects on microcomputers in radiation therapy environments. Journal of Radiotherapy in Practice, 2020, 1-4.

Gessler DJ, Ferreira C, Dusenbery K, Chen C. GammaTile®: Surgically targeted radiation therapy for glioblastomas. Future Oncology, 2020, 16(30), 2445-2455.

Rogers R, Lawrence J, Chmura J, Ehler E, Ferreira C. Dosimetric Characterization of a Novel 90Y Source for Use in the Conformal Superficial Brachytherapy Device, Physica Medica, 2020 72:52-59.

Rogers B, Lawrence J, Ehler E, Ferreira C. Impact of various irradiation conditions on delivered dose and cell viability for in vitro cell irradiation. Biomedical Physics & Engineering Express 2019

Ferreira, C., Alaei, P., Chen, C., Reynolds, M., Sterling, D., Dusenbery, K. RTHP-32. First experience with GammaTile permanent implants for recurrent brain tummors. Neuro-Oncology 21(6), vi216 (2019) doi: 10.1093/neuonc/noz175.903

Chmura J, Erdman A, Ehler E, Lawrence J, Wilke C, Rogers B, Ferreira C. Novel design and development of a 3D-printed conformal superficial brachytherapy device for the treatment of non-melanoma skin cancer and keloids, 3D Printing in Medicine, 5:10 (2019)

Oare, C., Wilke, C., Ehler, E., Sterling, D., Mathew, D., Ferreira, C., Dose calibration of Gafchromic EBT3 film for Ir-192 brachytherapy source using 3D-printed PLA and ABS plastics, 3D Printing in Medicine 5(1), 3, 2019

Sendani, N., Alaei, P., Ferreira, C., Karimian, A., Impact of region of interest size and location in Gafchromic film dosimetry, Med Phys. 2018 May; 45(5):2329-2336.

Ferguson, S., Chen, Y., Ferreira, C., Islam, M., Keeling, V., Lau, A., Ahmad, S., Jin, H., Comparability of three output prediction models for a compact passively double-scattered proton therapy system, J Appl Clin Med Phys 2017; 1–10

Ferreira, C., Rasmussen, K., Leinweber, C., Johnson, D., Ahmad, S., Jae Won Jung, A novel conformal skin high-dose-rate brachytherapy device for the treatment of inoperable non-melanoma skin cancer and keloids, Brachytherapy 2017 16(1):215-222

Ferreira, C., De La Fuente Herman, T., Firestone, B., Matthiesen, C., Ahmad, S., Quantification of Dosimetric Uncertainty of I-125 COMS Eye Plaque Conference Proceedings, Medical Physics: 14th Mexican Symposium on Medical Physics 2016

Ferreira, C., Podder, TK; Rasmussen, K; Jung, JW. Praseodymium-142 microspheres for brachytherapy of nonresectable hepatic tumors. Brachytherapy Journal 2013 12:654-664

Cavalieri, R., Gay, H. A., Liu, J., Ferreira, M., Mota, H., Sibata, C.G., Allison, R. R., Total error shift patterns for daily CT on rails image-guided radiotherapy to the prostate bed. Radiation Oncology 2011

Rocha, M. S., Ferreira, M. C., Mesquita, O. N., Transition on the entropic elasticity of DNA, induced by intercalating molecules. Journal of Chemical Physics 2007


Board Certifications

American Board of Radiology - Therapy

Clinical Interests

Dr. Ferreira is specialized in Brachytherapy treatments for skin cancer, ocular melanoma, and brain tumors. She has a special interest in developing personalized radiation therapy approaches to cancer treatment with external beam radiation, Gamma Knife stereotactic radiosurgery, and brachytherapy modalities. Her research focuses on finding solutions to improve Brachytherapy treatments and to find treatments that have the potential to improve clinical outcomes.