John MacKenzie, MD

Chief of Pediatric Radiology

Dr. John MacKenzie, chief of Pediatric Radiology at UCSF Benioff Children's Hospital, is a nationally renowned pediatric radiologist with a subspecialty focus in musculoskeletal imaging. He oversees a department that provides computed tomography, magnetic resonance imaging, ultrasound, fluoroscopy and plain-film radiography examinations. In his research, he addresses molecular imaging strategies to detect, treat and monitor pediatric autoimmune diseases, such as juvenile idiopathic arthritis, the most common autoimmune disease in children.

MacKenzie earned a bachelor's degree in computer science and master's degree in biology at Stanford University, and a medical degree at the Albert Einstein College of Medicine. He completed a residency in diagnostic radiology at Brigham and Women's Hospital and completed two fellowships, one in musculoskeletal MRI at the Hospital of the University of Pennsylvania and another in pediatric radiology at Children's Hospital of Philadelphia. Before joining UCSF, he was chief of Pediatric Musculoskeletal Imaging at Lucile Packard Children's Hospital at Stanford. MacKenzie is a member of the Society of Pediatric Radiology, Radiology Society of North America and International Society of Magnetic Resonance Imaging. He is an assistant professor in residence at the UCSF School of Medicine.

  • Hear an interview with MacKenzie, who discusses the risks and protective measures in medical imaging for children.


1975 Fourth St., First Floor
San Francisco, CA 94158
Appointments: (415) 353-2573
Office: (415) 476-1568

More about John MacKenzie


Albert Einstein School of Medicine 2000


Brigham & Women's Hospital, Radiology 2005


University of Pennsylvania Hospital, Bone & Joint Imaging 2006
Children's Hospital of Philadelphia, Pediatric Radiology 2007

Selected Research and Publications

  1. Edwards EA, Pigg N, Courtier J, Zapala MA, MacKenzie JD, Phelps AS. Intussusception: past, present and future. Pediatr Radiol. 2017 Aug; 47(9):1101-1108.
  2. Poynton CB, Lee MM, Li Y, Laszik Z, Worters PW, Mackenzie JD, Courtier J. Intravoxel incoherent motion analysis of renal allograft diffusion with clinical and histopathological correlation in pediatric kidney transplant patients: A preliminary cross-sectional observational study. Pediatr Transplant. 2017 Sep; 21(6).
  3. Oates A, Ahuja S, Lee MM, Phelps AS, Mackenzie JD, Courtier JL. Pediatric renal transplant biopsy with ultrasound guidance: the 'core' essentials. Pediatr Radiol. 2017 Jun 01.
  4. Li Y, Lee MM, Worters PW, MacKenzie JD, Laszik Z, Courtier JL. Pilot Study of Renal Diffusion Tensor Imaging as a Correlate to Histopathology in Pediatric Renal Allografts. AJR Am J Roentgenol. 2017 Jun; 208(6):1358-1364.
  5. Villanueva-Meyer JE, Naeger DM, Courtier JL, Hope MD, Lambert JW, MacKenzie JD, Phelps AS. Pediatric chest CT at chest radiograph doses: when is the ultralow-dose chest CT clinically appropriate? Emerg Radiol. 2017 Aug; 24(4):369-376.
  6. Leelakanok N, Zapala MA, Edwards EA, Phelps AS, Mackenzie JD, Courtier J. Incidental Findings on Pediatric Abdominal Magnetic Resonance Angiography. Acad Radiol. 2017 Sep; 24(9):1107-1113.
  7. Franc BL, Goth S, MacKenzie J, Li X, Blecha J, Lam T, Jivan S, Hawkins RA, VanBrocklin H. In Vivo PET Imaging of the Activated Immune Environment in a Small Animal Model of Inflammatory Arthritis. Mol Imaging. 2017 Jan 01; 16:1536012117712638.
  8. Phelps A, Ramachandran R, Courtier J, Perito E, Rosenthal P, MacKenzie JD. Ultrasound elastography: is there a shear wave speed cutoff for pediatric liver fibrosis and inflammation? Clin Imaging. 2017 Jan - Feb; 41:95-100.
  9. Zhang Y, Yang L, MacKenzie JD, Ramachandran R, Chen DZ. A seeding-searching-ensemble method for gland segmentation in H&E-stained images. BMC Med Inform Decis Mak. 2016 Jul 21; 16 Suppl 2:80.
  10. Ehman EC, Phelps AS, Ohliger MA, Rhee SJ, MacKenzie JD, Courtier JL. Detection of bowel inflammation with fused DWI/T2 images versus contrast-enhanced images in pediatric MR enterography with histopathologic correlation. Clin Imaging. 2016 Nov - Dec; 40(6):1135-1139.
  11. Steineck A, MacKenzie JD, Twist CJ. Premature physeal closure following 13-cis-retinoic acid and prolonged fenretinide administration in neuroblastoma. Pediatr Blood Cancer. 2016 Nov; 63(11):2050-3.
  12. Winger BA, Foy E, Sud SR, MacKenzie JD, Pua HH, Lau AH, Heyman MB, Laszik Z, Tureen J. Mycobacterium bovis Enterocolitis in an Immunocompromised Host. J Pediatr Gastroenterol Nutr. 2016 Jul; 63(1):e17-9.
  13. Li Y, Phelps A, Zapala MA, MacKenzie JD, MacKenzie TC, Courtier J. Magnetic resonance imaging of Müllerian duct anomalies in children. Pediatr Radiol. 2016 May; 46(6):796-805.
  14. Patel MV, Leibowich S, Courtier JL, Rhee S, MacKenzie JD. Disodium gadoxetate uptake in progressive familial intrahepatic cholestasis type I: Enhancing our understanding of the cholestatic disease. Radiol Case Rep. 2013; 8(1):661.
  15. Kim MJ, Rinsky LA, MacKenzie JD. Scapular stress fracture initially masquerading as tumor or infection. Radiol Case Rep. 2011; 6(4):510.
  16. Lambert JW, Phelps AS, Courtier JL, Gould RG, MacKenzie JD. Image quality and dose optimisation for infant CT using a paediatric phantom. Eur Radiol. 2016 May; 26(5):1387-95.
  17. Courtier J, Cardenas A, Tan C, Towne M, Rhee SJ, Heyman MB, MacKenzie JD. Nonanesthesia magnetic resonance enterography in young children: feasibility, technique, and performance. J Pediatr Gastroenterol Nutr. 2015 Jun; 60(6):754-61.
  18. Basta AM, Courtier J, Phelps A, Copp HL, MacKenzie JD. Scrotal swelling in the neonate. J Ultrasound Med. 2015 Mar; 34(3):495-505.
  19. Courtier J, Cardenas A, Tan C, Towne M, Rhee SJ, Heyman M, MacKenzie JD. Non-Anesthesia MR Enterography in Very Young Children-Feasibility, Technique and Performance. J Pediatr Gastroenterol Nutr. 2015 Jan 05.
  20. Phelps AS, Naeger DM, Courtier JL, Lambert JW, Marcovici PA, Villanueva-Meyer JE, MacKenzie JD. Pairwise comparison versus Likert scale for biomedical image assessment. AJR Am J Roentgenol. 2015 Jan; 204(1):8-14.

Publications are derived from MEDLINE/PubMed and provided by UCSF Profiles, a service of the Clinical & Translational Science Institute (CTSI) at UCSF. Researchers can make corrections and additions to their publications by logging on to UCSF Profiles.