DO - Oklahoma State University, College of Osteopathic Medicine, Tulsa, OK
Traditional Rotating Internship - University of Pittsburgh Medical Center, Mercy, Pittsburgh, PA
Diagnostic Radiology - Oklahoma State University Medical Center, Tulsa, OK
Pediatric Radiology - pChildren's Hospital of Philadelphia, Philadelphia, PA
Diagnostic Radiology – American Board of Radiology
Pediatric Radiologist
Director, Fellowship, Residency and Observership Programs
Assistant Professor of Clinical Radiology, Perelman School of Medicine at the University of Pennsylvania
Tierradentro-Garcia, L. O., Onyango, L., Dennis, R., Freeman, C. W., Haddad, S., Kozak, B., & Hwang, M.: Evaluation of the Cerebrospinal Fluid Flow Dynamics with Microvascular Imaging Ultrasound in Infants. Children (Basel, Switzerland) 10(2): 245, January 2023 Notes: DOI: 10.3390/children10020245.
Lopez-Rippe, J., Schwartz, E. S., Davis, J. C., Dennis, R. A., Francavilla, M. L., Jalloul, M., & Kaplan, S. L. (2023). Imaging Stewardship: Triage for Neuroradiology MR During Limited-Resource Hours. Journal of the American College of Radiology : JACR, S1546-1440(23)00777-9. Advance online publication. https://doi.org/10.1016/j.jacr.2023.10.010
Calle-Toro, J. S., Elsingergy, M. M., Dennis, R., Grassi, D., Kidd, M., Otero, H., & Andronikou, S: Frequency of duodenal anatomical variants in neonatal and pediatric upper gastrointestinal tract series (UGI) and the influence of exam quality on diagnostic reporting of these. Clinical Imaging 87: 28-33, July 2022 Notes: DOI: 10.1016/j.clinimag.2022.04.004.
Hwang M, Tierradentro-García LO, Dennis RA, Anupindi SA.: The role of ultrasound in necrotizing enterocolitis. Pediatric Radiology 52(4): 702-715, April 2022 Notes: DOI: 10.1007/s00247-021-05187-5.
Tierradentro-Garcia, L. O., Stern, J. A., Dennis, R., & Hwang, M.: Utility of Cerebral Microvascular Imaging in Infants Undergoing ECMO. Children (Basel, Switzerland) 9(12): 1827, November 2022 Notes: DOI: 10.3390/children9121827.
Eng, D. K., Khandwala, N. B., Long, J., Fefferman, N. R., Lala, S. V., Strubel, N. A., Milla, S. S., Filice, R. W., Sharp, S. E., Towbin, A. J., Francavilla, M. L., Kaplan, S. L., Ecklund, K., Prabhu, S. P., Dillon, B. J., Everist, B. M., Anton, C. G., Bittman, M. E., Dennis, R., Larson, D. B., … Halabi, S. S.: Artificial Intelligence Algorithm Improves Radiologist Performance in Skeletal Age Assessment: A Prospective Multicenter Randomized Controlled Trial. Radiology 301(3): 692-699, December 2021 Notes: DOI: 10.1148/radiol.2021204021.
Dennis R, Anupindi S, Khwaja A: How to Diagnose Intussusception in Children. Applied Radiology 50(1): 19-27, January 2021. DOI:10.37549/AR2699. Notes: https://appliedradiology.com/articles/how-to-diagnose-intussusception-in-children.
Chidambaram, A. G., Dennis, R. A., Biko, D. M., Hook, M., Allen, J., & Rapp, J. B: Clinical and radiological characteristics of e-cigarette or vaping product use associated lung injury. Emergency Radiology 27(5): 495-501, May 2020 Notes: DOI: 10.1007/s10140-020-01796-z.
Benjamin, J. L., Dennis, R., White, S., Jr, Munson, D., Anupindi, S. A., Piskunowicz, M., Darge, K., Gokli, A., & Hwang, M: Improved Diagnostic Sensitivity of Bowel Disease of Prematurity on Contrast-Enhanced Ultrasound. Journal of ultrasound in medicine: official journal of the American Institute of Ultrasound in Medicine 39(5): 1031-1036, May 2020. DOI:10.1002/jum.15168.
Acord, M.R., Dennis, R.A., Srinivasan, A.S., Anupindi, S.A: Radiologic Evaluation of Pediatric Inflammatory Bowel Disease. Pediatric Inflammatory Bowel Disease Page: 255-266, February 2023 Notes: https://link.springer.com/book/10.1007/978-3-031-14744-9; Online ahead of print as of September 2023.
Dennis R, Koberlein G, Anupindi S, Flowers C, Kerwood J, Lavelle J, Mamula P, Kaplan S: Esophageal Foreign Body Impaction Assessed by Oral Contrast Radiography Technique. Society of Pediatric Radiology Annual Meeting and Postgraduate Course, Austin, TX May 2023 Notes: Oral presentation.
Tierradentro-Garcia LO, Onyango L, Dennis R, Freeman C, Haddad S, Kozak B, Hwang M: Evaluation of the Cerebrospinal Fluid Flow Dynamics with Microvascular Imaging Ultrasound in Infants. Society of Pediatric Radiology Annual Meeting and Postgraduate Course, Austin, TX May 2023 Notes: Oral presentation.
Tierradentro-Garcia LO, Stern J, Dennis R, Hwang M: Ultrasound in Infants Undergoing ECMO: The Utility of Microvascular Imaging. Society of Pediatric Radiology Annual Meeting and Postgraduate Course, Austin, TX May 2023 Notes: Oral presentation.
Kaplan SL, Sotardi S, Francavilla ML, Dennis RA, Davis JC, Schwartz ES: Triage of overnight neuro MR imaging requests. European Society for Pediatric Radiology Annual Meeting, Marseille, France June 2022 Notes: Oral presentation.
Stern J, Dennis R, Tierradentro-Garcia L, Haddad S, Hwang M: Utility of Cerebral Microvascular Imaging in Predicting Mortality in ECMO Patients. European Society for Pediatric Radiology Annual Meeting, Marseille, France June 2022 Notes: Oral presentation.
Tierradentro-Garica LO, Dennis R, Khwaja A, Vuma M, Zandifar A, Darge K, Anupindi S, Blinman TA, Hwang M: Diagnosing midgut volvulus in infants. Pendergrass Research Symposium, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA June 2021 Notes: Poster Presentation, received summa cum laude.
Elsingergy, M. M., Calle-Toro, J. S., Dennis, R., Grassi, D., Otero, H., Andronikou, S: Frequency of duodenal anatomical variants in neonatal and pediatric upper gastrointestinal tract series (UGI) and the influence of exam quality on diagnostic reporting. International Pediatric Radiology Congress, Rome, Italy October 2021 Notes: Poster presentation.
Ramirez-Suarez KI, Biko DM, Dennis RA, Otero HJ, White AM, Rapp JB: CT and MRI Findings of Lymphoid Thymic Hyperplasia and Thymoma in Children. International Pediatric Radiology Congress, Rome, Italy October 2021 Notes: Oral presentation.
Tierradentro-Garica LO, Dennis R, Khwaja A, Vuma M, Zandifar A, Darge K, Anupindi S, Blinman TA, Hwang M: Diagnosing midgut volvulus in infants. International Pediatric Radiology Congress, Rome, Italy October 2021 Notes: Poster presentation.
Vuma M, Tierradentro-Garcia LO, Dennis R, Khwaja A, Zandifar A, Darge K, Anupindi S, Blinman TA, Hwang M: Diagnostic efficiency of ultrasound for intestinal malrotation in infants: experience from a tertiary children's hospital. International Pediatric Radiology Congress, Rome, Italy October 2021 Notes: Poster presentation.
Hook, Marcus MD; Chidambaram, Ambika MD; Biko, David MD; Dennis, Rebecca DO; Rapp, Jordan MD: Imaging appearance of vaping-associated pulmonary injury. Society for Pediatric Radiology Annual Meeting & Postgraduate Course, Miami, FL (virtual) May 2020 Notes: Podium Presentation.
Ambika G. Chidambaram, Rebecca A. Dennis, David M. Biko, Marcus Hook, Julian Allen, Jordan B. Rapp: Clinical and radiological characteristics of e-cigarette or vaping product use associated lung injury. American Academy of Pediatrics National Conference (Virtual) October 2020 Notes: Poster presentation.
Rosara Bass, MD, Mary Bridget Kastl, APN, Laura Shanley, PharmD, Rebecca Dennis, DO, Maria Mascarenhas, MD, Summer L Kaplan, MD: Clinical and radiographic features associated with fluoroscopic enema success in treatment of distal intestinal obstruction syndrome in cystic fibrosis. North American Society for Pediatric Gastroenterology, Hepatology and Nutrition (NASPGHAN) Annual Meeting and Postgraduate Course (Virtual) October 2020 Notes: Poster Presentation.
Dennis, R.; Silvestro, E.; Hill, L.; Andronikou, S.; Anupindi, S.; Hwang, M.: Development of a 3D ultrasound bowel phantom for trainee education. Society for Pediatric Radiology Annual Meeting & Postgraduate Course, San Francisco, CA May 2019 Notes: Poster presentation.
Dennis R. "Hepatic CEUS: Troubleshooting Tool for Liver Lesions in Children", European Society Of Paediatric Radiology (ESPR) Annual Meeting & Post Graduate Course, Belgrade, Serbia. June 2023.
Dennis R. Hepatic CEUS: Routine Examinations and Evaluation of Focal Liver Lesions in Children", European Society Of Paediatric Radiology (ESPR) Annual Meeting & Post Graduate Course, Belgrade, Serbia. June 2023.
Dennis R. "Pediatric Hepatic CEUS: Troubleshooting Tool", Fundamentals of CEUS for Imaging Pediatric Patients, International Contrast Ultrasound Society Webinar Course (Virtual). September 2023.
Dennis R. "CEUS of Pediatric Inflammatory Bowel Disease", CHOP Center for Pediatric Contrast Ultrasound Webinar, Children's Hospital of Philadelphia, Philadelphia, PA (Virtual). February and June 2022.
Dennis R. "CHOP/AAU Case Presentation", Addis Ababa University, Ethiopia (Virtual). February 2022.
Dennis R. "Evaluation of the Pediatric Abdominal X-ray", radiology residents, Princess Marina Hospital, Botswana (Virtual). February 2022.
Dennis R. "Hepatic CEUS in Children", Intravenous Contrast Ultrasound Application in Children, International Contrast Ultrasound Society Webinar (Virtual). October 2022.
Dennis R. "Multimodality Imaging of Stomach and Bowel Masses in Children", The 9th Annual National Pediatric Radiology Continuing Medical Education Conference, Addis Ababa University at Tikur Anbessa Hospital with Children's Hospital of Philadelphia, University of Pennsylvania and the Ethiopian Society of Radiology (Virtual) March 2021.
Dennis R. "CEUS of Pediatric Inflammatory Bowel Disease", CHOP Center for Pediatric Contrast Ultrasound Webinar, Children's Hospital of Philadelphia, Philadelphia, PA (Virtual) September 2021.
Dennis R. "Pediatric Case Review" Department of Radiology, Black Lion Hospital, Ethiopia (Virtual). September 2021.
Dennis R. "Sharing First Experiences with the New PureWave mC12-3 Transducer and New Enhancements on the EPIQ Elite for Pediatric Ultrasound", International Pediatric Radiology Congress, Rome, Italy (Virtual). October 2021.
Dennis R. "Pediatric Board Review", Einstein Healthcare Network. January 2021.
2021, Teacher of the Yea, Division of Body Imaging, Department of Radiology, Children’s Hospital of Philadelphia
2017, 2nd Place for Scientific Exhibit, American Osteopathic College of Radiology Annual Conference
2020-present, Education Core Committee, Department of Radiology
2020-present, Quality Improvement Committee for Emergency Department Radiology Turnaround Times, Departments of Radiology and Emergency Medicine
2020-present, Education Committee, Department of Radiology
2019-present, Education Officer, Emergency (ED) Radiology Section in the Department of Radiology
2019-present, Education Officer, Gastroenterology (GI) Radiology Section in the Department of Radiology
2020-present, European Society of Paediatric Radiology
2014-present, Radiological Society of North America
2020-present, American Society of Emergency Radiology
2020-present, American Institute of Ultrasound in Medicine
2017-present, American Medical Association
2016-present, Society for Pediatric Radiology
2014-present, American Roentgen Ray Society
2014-present, American Osteopathic College of Radiology
2014-present, American College of Radiology
2009-present, American Osteopathic Association