Dr. Kellar completed her MD at the University of Calgary, receiving the Nat Christie Medical Entrance Scholarship, appointed to the Leaders in Medicine program for physicians pursuing academic medicine. She completed her Pediatric residency at the Hospital for Sick Children and her Pediatric Gastroenterology fellowship at the University of Calgary. She went on to complete an advanced fellowship in adult IBD and an additional year of advanced IBD fellowship at Mount Sinai Hospital in NY with specialized training in intestinal ultrasound. Dr. Kellar has made several significant contributions to the field of IBD research. Among her accomplishments are her 1st author publication of the first ever guideline outlining the use of intestinal ultrasound for the Pediatric Gastroenterologists. She is also 1st author on the first pediatric activity ultrasound score (SPAUSS) for accurate detection of pediatric inflammatory bowel disease. Her research was highlighted at Advances in IBD, the European Crohn’s and Colitis Organization (ECCO) Congress, as well as Digestive Disease Week (DDW). She received the Marguerite Herschel Award for Clinical Excellence (2024), selected for ACG Clinical Research Leadership Program (2026), named Principal Investigator of the Year 2026, Distinguished Leader in Program Innovation Award for Junior Faculty for the Biological Sciences Division (2026), and the Peter Huttenlocher Award for Scholarly Excellence (2026).
Dr. Kellar is one of few certified intestinal ultrasonographers and trainers with the International Bowel Ultrasound Group (IBUS) and was appointed to the Pediatric Committee for IBUS. She is the Chair of Research for iUSCAN (the North American subdivision of IBUS). She is the Director of Pediatric IUS, and Co-Director of the Pediatric IBD Program and is cross-appointed to both Pediatric and Adult Gastroenterology at the University of Chicago. Her research interests include intestinal ultrasound, novel and dual advanced therapies and clinical trials.
Icahn School of Medicine at Mount Sinai
New York (USA)
- Pediatric Inflammatory Bowel Disease Fellowship
2023
University of Calgary
Calgary, AB (Canada)
- Adult Inflammatory Bowel Disease Fellowship
2022
University of Calgary
Calgary, AB (Canada)
FRCPC - Pediatric Gastroenterology Fellowship
2021
University of Toronto, Hospital for Sick Children
Toronto, ON (Canada)
FRCPC - Pediatric Residency
2019
University of Calgary
Calgary, AB (Canada)
MD - Medicine
2016
Queen's University
Kingston, ON (Canada)
MSc - Pathology & Molecular Medicine
2009
Queen's University
Kingston, ON (Canada)
BScH - Biology, minor Psychology
2007
Ultrasound criteria for transmural healing and response in Crohn's disease: a systematic review of definitions and thresholds.
Ultrasound criteria for transmural healing and response in Crohn's disease: a systematic review of definitions and thresholds. Inflamm Bowel Dis. 2026 Jun 01.
PMID: 42222916
Intestinal Ultrasound for Monitoring Postoperative Crohn's Disease: A Review and Visual Atlas.
Intestinal Ultrasound for Monitoring Postoperative Crohn's Disease: A Review and Visual Atlas. Inflamm Bowel Dis. 2026 Apr 01; 32(4):755-764.
PMID: 41335492
Reliability and Validity of Mesenteric Fat Assessment by Intestinal Ultrasound in Pediatric Crohn's Disease Using the Chicago Mesenteric Fat Index.
Reliability and Validity of Mesenteric Fat Assessment by Intestinal Ultrasound in Pediatric Crohn's Disease Using the Chicago Mesenteric Fat Index. Inflamm Bowel Dis. 2026 Mar 01; 32(3):444-451.
PMID: 41206568
The Chicago Mesenteric Fat Index: A Novel Metric for Point-of-Care Intestinal Ultrasound Evaluation of Mesenteric Fat Wrapping in Crohn's Disease.
The Chicago Mesenteric Fat Index: A Novel Metric for Point-of-Care Intestinal Ultrasound Evaluation of Mesenteric Fat Wrapping in Crohn's Disease. Inflamm Bowel Dis. 2026 03 01; 32(3):452-460.
PMID: 41441773
Is There a Role for Intestinal Ultrasound in Polyp Detection?
Is There a Role for Intestinal Ultrasound in Polyp Detection? ACG Case Rep J. 2026 Mar; 13(3):e02036.
PMID: 41767341
Expect the unexpected: A case of penetrating Crohn's disease complicated by foreign body ingestion.
Expect the unexpected: A case of penetrating Crohn's disease complicated by foreign body ingestion. JPGN Rep. 2026 Feb; 7(1):107-109.
PMID: 41695052
Incidence and Risk Factors for Development of Acne (JAKne) in Patients with Inflammatory Bowel Disease Treated With Upadacitinib.
Incidence and Risk Factors for Development of Acne (JAKne) in Patients with Inflammatory Bowel Disease Treated With Upadacitinib. Inflamm Bowel Dis. 2025 Aug 01; 31(8):2311-2314.
PMID: 40411447
The EXTENT Study: Results From an International Expert Delphi Consensus to Define Ultrasonographic Parameters for Measuring Bowel Damage in Crohn's Disease.
The EXTENT Study: Results From an International Expert Delphi Consensus to Define Ultrasonographic Parameters for Measuring Bowel Damage in Crohn's Disease. Clin Gastroenterol Hepatol. 2025 Jul 28.
PMID: 40738277
Sonographic Transmural Induction Outcomes Across Advanced Therapies in Crohn's Disease.
Sonographic Transmural Induction Outcomes Across Advanced Therapies in Crohn's Disease. Dig Dis Sci. 2025 Nov; 70(11):3912-3921.
PMID: 40618289
ECCO-ESGAR-ESP-IBUS Guideline on Diagnostics and Monitoring of Patients with Inflammatory Bowel Disease: Part 1.
ECCO-ESGAR-ESP-IBUS Guideline on Diagnostics and Monitoring of Patients with Inflammatory Bowel Disease: Part 1. J Crohns Colitis. 2025 Jul 03; 19(7).
PMID: 40741688
Principal Investigator of the Year
University of Chicago
2026 - 2026
Distinguished Leader in Program Innovation Award for Junior Faculty for the BSD
University of Chicago
2026 - 2026
Peter Huttenlocher Award for Scholarly Excellence
University of Chicago
2026 - 2026
Marguerite Herschel Awards for Clinical Excellence
University of Chicago
2024
The Marguerite Herschel Award for Clinical Excellence
University of Chicago
2024 - 2024
AIBD Fellow Travel Grant
Advances in Inflammatory Bowel Disease
2023 - 2023
CANADIAN ASSOCIATION OF GASTROENTEROLOGY RESIDENT RESEARCH AWARD
CAG
2020 - 2021
ALBERTA MEDICAL ASSOCIATION PAEDIATRIC SECTION GRANT
Alberta Medical Association
2020 - 2021
PAEDIATRIC RESEARCH AWARD
Hospital for Sick Children
2017 - 2017
DR. KEN BUCHAN MEMORIAL AWARD
University of Calgary
2015 - 2016
NAT CHRISTIE FOUNDATION MEDICAL ENTRANCE AWARD
University of Calgary
2013 - 2016