Education and Training

Medical School

MD - Oregon Health & Science University, Portland, OR

Internship

Transitional - lntermountain Medical Center, Salt Lake City, UT

Residency

Diagnostic Radiology - Oregon Health & Science University, Portland, OR (chief resident)

Fellowship

Research Fellow - National Institutes of Health, New York City, NY
Pediatric Radiology - Boston Children's Hospital, Boston, MA

Board Certification

Pediatric Radiology – American Board of Radiology
Radiology

Titles and Academic Titles

Attending Radiologist

Assistant Professor of Radiology, Perelman School of Medicine at the University of Pennsylvania

Departments and Services

Publications

Papers

2021

Coons BE, Lawrence KM, Didier R, Sridharan A, Moon JK, Rossidis AC, Baumgarten HD, Kim AG, Mejaddam AY, Ozawa K, De Bie F, Davey M, Flake AW: Fetoscopic insufflation modeled in the extrauterine environment for neonatal development (EXTEND): Fetoscopic insufflation is safe for the fetus. Journal of Pediatric Surgery 56(1): 170-179, Jan 2021.

Lawrence KM, Coons BE, Sridharan A, Davey MG, Flake AW, Didier RA: Contrast-Enhanced Brain Ultrasound Perfusion Metrics in the EXTra-uterine Environment for Neonatal Development (EXTEND): Correlation with Hemodynamic Parameters. Journal of Ultrasound in Medicine Jan 2021 Notes: doi: 10.1002/jum.15642. Online ahead of print.

Sridharan, A., Lawrence, K. M., Martin-Saavedra, J. S., Davey, M. G., Flake, A. W., & Didier, R. A: Quantitative contrast-enhanced ultrasound of the brain on twin fetal lambs maintained by the extrauterine environment for neonatal development (EXTEND): initial experience. Pediatric Radiology 51(1): 103-111, Jan 2021.

Didier RA, Oliver ER, Rungsiprakarn P, DeBari SE, Adams SE, Hedrick HL, Adzick NS, Khalek N, Howell LJ, Coleman BG.: Decreased morbidity of 'bowel-only' left congenital diaphragmatic hernia patients: implication of prenatal ultrasound diagnosis for prenatal counseling and postnatal management. Ultrasound in Obstetrics and Gynecology Mar 2021 Notes: Online ahead of print. DOI: 10.1002/uog.23630.

2020

McGovern, PE, Lawrence, K, Baumgarten, H, Rossidis, AC, Mejaddam, AY, Licht, DJ, Grinspan, J, Schupper, A, Rychik, J, Didier, RA, Vossough, A, Spray, TL, Peranteau, WH, Davey, MG, Flake, AW, & Gaynor, JW.: Ex Utero Extracorporeal Support as a Model for Fetal Hypoxia and Brain Dysmaturity. The Annals of Thoracic Surgery 109(3): 810-819, Mar 2020.

Oliver ER, DeBari SE, Didier RA, Johnson AM, Khalek N, Horii SC, Victoria T, Hedrick HL, Adzick NS, Howell LJ, Moldenhauer JS, Coleman BG: Two's Company: Multiple thoracic Lesions on Prenatal US and MRI. Pediatric Radiology 49(5): 593-599, Jun 2020.

Oliver ER, Heuer GG, Thom EA, Burrows PK, Didier RA, Debari SE, Martin-Saavedra JS, Moldenhauer JS, Jatres J, Howell LJ, Adzick NS, Coleman, BG: Myelomeningocele Sac Associated with Worse Lower Extremity Neurologic Sequela: Evidence of Prenatal Neural Stretch Injury. Ultrasound in Obstetrics and Gynecology 55(6): 740-746, Jun 2020.

Didier RA, Martin-Saavedra JS, Oliver ER, DeBari, SE, Bilaniuk LT, Howell LJ, Moldenhauer JS, Adzick NS, Heuer GG, Coleman BG: Fetal Intraventricular Hemorrhage in Open Neural Tube Defects: Prenatal Imaging Evaluation and Perinatal Outcomes. American Journal of Neuroradiology 41(10): 1923-1929, Oct 2020.

McGovern PE, Hornick MA, Mejaddam AY, Lawrence K, Schupper AJ, Rossidis AC, Baumgarten H, Vossough A, Didier RA, Kim A, Partridge EA, Hwang G, Young K, Peranteau WH, Davey MG, Flake EW: Neurologic outcomes of the premature lamb in an extrauterine environment for neonatal development. Journal of pediatric surgery 55(10): 2115-2123, Oct 2020.

Didier RA, Sridharan A, Coons BE, Martin Saavedra JS, Larson AC, Davey MG, Hedrick HL, Flake AW: Contrast-Enhanced Brain Ultrasound Perfusion Parameters in Congenital Diaphragmatic Hernia in the EXTra-uterine Environment for Neonatal Development. Pediatric Radiology 50(Suppl 1): S68, 2020.

Oliver ER, DeBari SE, Didier RA, Johnson AM, Khalek N, Peranteau WH, Howell LJ, Adzick NS, Coleman BG: Two's Company: Multiple Thoracic Lesions on Prenatal US and MRI. Fetal Diagnosis and Therapy 47(8), 2020 Notes: doi: 10.1159/000507783.

2019

Oliver ER, DeBari SE, Adams SE, Didier RA, Horii SC, Victoria T, Hedrick HL, Adzick NS, Howell LJ, Moldenhauer JS, Coleman BG. Congenital diaphragmatic hernia sacs: prenatal imaging and associated postnatal outcomes. Pediatr Radiol. 2019 Jan 11. doi: 10.1007/s00247-018-04334-9. [Epub ahead of print]

Lawrence KM, McGovern PE, Mejaddam A, Rossidis AC, Baumgarten H, Kim A, Grinspan JB, Licht DJ, Didier RA, Vossough A, Radaelli E, Rychik J, Song L, Peranteau WH, Davey MG, Flake AW, Gaynor JW. Chronic intrauterine hypoxia alters neurodevelopment in fetal sheep. J Thorac Cardiovasc Surg. 2019 Jan 11;. PMID: 30745051 

2018

Didier RA, Sridharan A, Lawrence K, Coleman BG, Davey MG, Flake AW. Contrast-Enhanced Ultrasound in Extracorporeal Support: In Vitro Studies and Initial Experience and Safety Data in the Extreme Premature Fetal Lamb Maintained by the Extrauterine Environment for Neonatal Development. J Ultrasound Med. 2018 Dec 17;. PMID: 30560564 

Didier RA, DeBari SE, Oliver ER, Gebb JS, Howell LJ, Hedrick HL, Adzick NS, Coleman BG (2018 Sep 23). Secondary Imaging Findings Aid in Prenatal Diagnosis and Characterization of Congenital Diaphragmatic Hernia: Role of an Abnormal Orientation of Vascular Structures and Gallbladder Position. J Ultrasound Med. doi: 10.1002/jum.14823. PMID: 30244484. Epub ahead of print.

2016

Pool G, Didier RA, Selden NR, Kuang AA. Pediatrics computed tomographic generated anthropometric measurements of orbital relationships in normal infants and children. J Neurosurg Pediatr. 2016 Apr 29: 1-6. [Epub ahead of print]

Zarella C, Didier R, Bergquist C, Bardo OM, Selden NR, Kuang AA. A reduction in radiation exposure during pediatric craniofacial computed tomography. J Craniofac Surg. 2016 Mar;27(2):331-3.

2015

Didier RA, Vajtai PL, and Hopkins KL. Iterative reconstruction technique with reduced volume CT dose index: diagnostic accuracy in pediatric acute appendicitis. Pediatr Radio I 2015; 45(2): 181-7.

2014

Ghazizadeh S, Foss EW, Didier R, Fung A, Panicek DM, Coakley FV. Musculoskeletal pitfalls and pseudotumors in the pelvis: a pictorial review for body imagers. Br J Radio] 2014;87(1042):20140243.

Grant MJ, Didier RA, Stevens JS, Beyder DD, Hunter JG, Thomas CR, Coakley FV. Radiation-induced liver disease as a mimic of liver metastases at serial PET/CT during neoadjuvant chemoradiation of distal esophageal cancer. Abdom Imaging 2014;39(5):963-8.

Coakley FV, Grant MJ, Behr S, Foster BR, Korngold EK, Didier RA. Imaging of invasive thymoma in the costophrenic recess presending as thickening of arcuate ligaments of the diaphragm. Clin Imaging 2014; 38(4):529-31.

2013

Kuang AA, Jenq T, Didier R, Moneta L, Bardo D, Selden NR.Benign radiographic coronal synostosis after sagittal synostosis repair. J Craniofac Surg 2013; 24(3):937-40.

Didier R. Oh K, Sohaey R, Kettler M. MRSA abscess following ductography. J Rad Nurs 2013; 32( 1 ): 32-36.

2010

Didier RA, Kuang AA, Schwartz DL, Selden NR, Stevens DM, Bardo DM. Decreasing the effective dose in pediatric craniofacial CT by changing head position. Pediatr Radiol 2010;40( 12): 1910-1917.

2009

Baggot M, Galloway G, Pournajafi-Nazarloo H, Carter CS, Didier R, Jang M, Coyle J, Mendelson J. MOMA ('Ecstasy') impairs categorization of brief fearful expressions. Journal of Vision 2009;9(8):article 49.

2008

Galloway GP, Didier R, Garrison K, Mendelson J. Feasibility of ecological momentary assessment using cellular telephones in methamphetamine dependent subjects. Subst Abuse 2008; 1 :9-14.

Books

Chapters

2019

Piskunowicz M, Srinivasan AS, Didier RA: Pediatric Applications: Small Parts. Specialty Imaging: Fundamentals of CEUS. Arthur Gelsinger (eds.). Elsevier Health Sciences, Page: 376-379, Mar 2019 Notes: ISBN-13: 978-0323625647, ISBN-10: 0323625649.

 

Posters and Presentations

2022

Gebb JS, Hwang R, Soni S, Paidas-Teefey C, Rychik J, Didier R, Moldenhauer J, Khalek N.: "Recipient cardiac dysfunction does not increase risk for demise after laser for Twin-Twin Transfusion Syndrome" Society for Maternal Fetal Medicine Annual Meeting Feb 2022 Notes: poster.

Khalek N, Gebb J, Soni S, Hwang R, Paidas Teefey C, Didier R, Moldenhauer J: Is There an Optimal Gestational Age for Selective Cord Occlusion in Monochorionic Pregnancies Complicated by Selective Fetal Growth Restriction? Society for Maternal Fetal Medicine Annual Meeting Feb 2022 Notes: poster.

Larson AC, Sridharan A, Agarwal D, Moon JK, Chang J, Forsberg F, Didier RA.: Contrast-Enhanced Subharmonic Aided Pressure Estimation (SHAPE) for Assessment of Intracranial Pressure In Vivo. American Institute of Ultrasound in Medicine Annual Meeting Mar 2022 Notes: oral presentation. 35. Oliver ER, Didier RA, DeBari S, Victoria T, Soni S, Adzick NS, Coleman BG: Location, Location, Location: The Real Estate of Fetal Lung Lesions. American Institute of Ultrasound in Medicine Annual Meeting Mar 2022.

Huynh M-H, Didier RA, Feygin T, Paidas Teefey C, Coleman BG, Oliver ER: Kaposiform Hemangioendotheliomas: Expanding the Differential for Prenatal Cervical Masses. Society for Pediatric Radiology Annual Meeting Apr 2022 Notes: electronic poster.

Larson Ac, Sridharan A, Agarwal D, Chang J, Partridge E, Didier RA: Contrast-Enhanced Ultrasound in Fetal Model of Congenital Diaphragmatic Hernia. Society for Pediatric Radiology Annual Meeting Apr 2022 Notes: oral presentation.

2021

Larson AC, Didier RA, Sridharan A, Agarwal D, Chang J, Partridge E.: The Fetal Lamb Model of Congenital Diaphragmatic Hernia Shows Alteration in Pulmonary Perfusion via Pulmonary Arterial Doppler and Contrast Enhanced Ultrasound American Academy of Pediatrics Annual Meeting Oct 2021 Notes: oral presentation.

Larson AC, Didier RA, Sridharan A, Agarwal D, Chang J, Partridge E.: Fetal Lamb Model of Congenital Diaphragmatic Hernia Shows Altered Cerebral Perfusion Using Contrast Enhanced Ultrasound. American Academy of Pediatrics Annual Meeting Oct 2021 Notes: oral presentation.

Larson AC, Moon JK, Sridharan A, Agarwal D, Chang J, Forsberg F, Didier RA: Contrast-Enhanced Subharmonic Aided Pressure Estimation (SHAPE) for Assessment of Intracranial Pressure In Vivo. Radiologic Society of North America Annual Meeting Dec 2021 Notes: oral presentation.

2020

Didier RA, Oliver ER, Debari SE, Adams SE, Hedrick HL, Adzick NS, Khalek N, Howell LJ, Coleman BG: Decreased Morbidity and Mortality of "Bowel-Only" Left Congenital Diaphragmatic Hernia Patients: Implications of Prenatal US Diagnosis for Prenatal Counseling and Postnatal Management. American Institute of Ultrasound in Medicine Annual Meeting, New York City, NY Mar 2020 Notes: Oral presentation. (Canceled due to Covid-19).

Didier RA, Sridharan A, Coons BE, Martin Saavedra JS, Larson AC, Davey MG, Hedrick HL, Flake AW: Contrast-Enhanced Brain Ultrasound Perfusion Parameters in Congenital Diaphragmatic Hernia in the EXTra-uterine Environment for Neonatal Development. Society for Pediatric Radiology Annual Meeting, Miami, FL May 2020 Notes: Oral presentation. (Canceled due to Covid-19).

Didier RA, Larson AC, Sridharan A, Chang J, Poznick L, Hedrick HL, Partridge EA.: Fetal Lung Shear Wave Elastography in Lamb Model of Congenital Diaphragmatic Hernia. Radiologic Society of North America Annual Meeting Dec 2020 Notes: oral presentation.

Invited Lectures

2022

Didier RA. "Contrast-Enhanced Subharmonic Aided Pressure Estimation (SHAPE) for Assessment of Intracranial Pressure In Vivo," American Institute of Ultrasound in Medicine Annual Meeting, San Diego, CA. Mar 2022.

2021

Didier RA. "Contrast-Enhanced Subharmonic Aided Pressure Estimation (SHAPE) for Assessment of Intracranial Pressure In Vivo," Radiological Society of North American Annual Meeting, Chicago, IL. Dec 2021.

Didier RA. "Tales from the Artificial Womb: Emerging Applications of Contrast-Enhanced Ultrasound in Fetal Medicine," 2021 International Pediatric Radiology Congress, Rome, Italy. Oct 2021.

Didier RA. "Emerging Applications of Pediatric Contrast-Enhanced Ultrasound," CHOP Center for Pediatric Contrast-Enhanced Ultrasound Webinar, Virtual. Sept 2021.

Didier RA. "Brain Contrast-Enhanced Ultrasound in Congenital Diaphragmatic Hernia," CHOP Fetal-Neonatal-Cardiology-Surgical Neuroscience Conference, Philadelphia, PA. Jul 2021.

Didier RA. "Pediatric Contrast-Enhanced Ultrasound," The Leading Edge in Diagnostic Ultrasound Annual Meeting, Virtual. May 2021.

Didier RA. "Fetal Lung Shear Wave Elastography in Lamb Model of Congenital Diaphragmatic Hernia," American Institute of Ultrasound in Medicine, Virtual. Apr 2021.

Didier RA. "Prenatal Imaging of Congenital Diaphragmatic Hernia: Past, Present, and Future," University of Manitoba, Winnipeg, Manitoba, Canada. Jan 2021.

2020

Didier RA. "Pediatric Vesicoureteral Reflux Studies," International Contrast-Enhanced Ultrasound Society, San Diego, CA (Canceled due to Covid-19). Jun 2020.

Didier RA. "CEUS in Children," International Contrast-Enhanced Ultrasound Society, San Diego, CA (Canceled due to Covid-19). Jun 2020.

Didier RA. "Contrast-Enhanced Brain Ultrasound Perfusion Parameters in Congenital Diaphragmatic Hernia in the EXTra-uterine Environment for Neonatal Development," Society for Pediatric Radiology Annual Meeting, Miami, FL (Canceled due to Covid-19). May 2020.

Didier RA. "How to Maximize Resources and Interdisciplinary Collaboration: Lessons from the Artificial Placenta," Society for Pediatric Radiology Annual Meeting, Miami, FL (Canceled due to Covid-19). May 2020.

Didier RA. "Pediatric Vesicoureteral Reflux Studies," Leading Edge in Ultrasound Annual Conference, Atlantic City, NJ (Canceled due to Covid-19). May 2020.

Didier RA. "CEUS in Children," Leading Edge in Diagnostic Ultrasound Annual Conference, Atlantic City, NJ (Canceled due to Covid-19). May 2020.

Didier RA. "Decreased Morbidity and Mortality of "Bowel-Only" Left Congenital Diaphragmatic Hernia Patients: Implications of Prenatal US Diagnosis for Prenatal Counseling and Postnatal Management," American Institute of Ultrasound in Medicine Annual Meeting, New York City, NY (Canceled due to Covid-19). Mar 2020.

Awards and Honors

2019, Caffey Award for Best Scientific Paper, Society for Pediatric Radiology

2018, Pilot Award, Society of Pediatric Radiology

2018, Research Scholar Grant Award, Radiological Society of North America (RSNA) Research and Education Foundation

2015, Roentgen Resident Research Award, Radiological Society of North America (RSNA) Research and Education Foundation

2015, Travel Award, Coalition for Imaging and Bioengineering Research Medical Technology Showcase

2014, Best Abstract Award, OHSU Radiology Research Retreat

2013, Best Paper Award, Pacific Coast Pediatric Radiology Association

2010, Alpha Omega Alpha Honor Society, Oregon Health & Science University, Portland, OR

2006, Honors degree, University of California, Berkeley, CA

2006, Phi Beta Kappa Honor Society, University of California, Berkeley, CA

2003-2006, Bonner Leader. Cal Corps Public Service Center, University of California, Berkeley, CA

2003-2006, California Alumni Association Leadership Scholar, University of California, Berkeley, CA

2003 & 2005, Dean 's Honor List, University of California, Berkeley, CA

Editorial and Academic Positions

Editorial Positions

2022-present, Reviewer, Ultrasound Quarterly
2021-present, Reviewer, European Journal of Radiology
2018-present, Reviewer, Journal of Ultrasound in Medicine
2017-present, Reviewer, American Journal of Roentgenology
2017-present, Reviewer, Pediatric Radiology
2017-present, Reviewer, Radiographics

Academic and Institutional Committees

2018-present, Scientific Review Committee, Department of Radiology

Leadership and Memberships

Memberships in Professional Organizations

International

2017-present, International Society for Magnetic Resonance in Medicine
2017-present, International Fetal Medicine and Surgery Society
2010-present, Radiological Society of North America

National

2017-present, American Institute of Ultrasound in Medicine
2013-present, Society for Pediatric Radiology
 - 2018-present, Fetal Imaging Committee
2013-present, American Association for Women Radiologists
2012-present, American Roentgen Ray Society
2010-present, American College of Radiology