Gregory L Compton1,2, Joshua Florence1, Cathy MacDonald1, Shi-Joon Yoo1, Tilman Humpl3, David Manson1. 1. 1 Department of Diagnostic Imaging, The Hospital for Sick Children, University of Toronto, ON, Canada. 2. 2 Present address: Department of Radiology, Queensland X Ray, Mater Private Hospital, 21-37 Fulham Rd, Townsville, Queensland 4812, Australia. 3. 3 Department of Paediatrics, The Hospital for Sick Children, University of Toronto, ON, Canada.
Abstract
OBJECTIVE: This study was performed to ascertain whether the adult ratio of 1:1 of the diameter of the main pulmonary artery (MPA) to the diameter of the ascending aorta (AA) (referred to hereafter as the MPA-to-AA ratio) on MDCT is applicable to children. MATERIALS AND METHODS: Our hypothesis, which is based on experiential observation, is that the MPA-to-AA ratio would be higher than 1 in healthy children. A retrospective analysis of vessel calibers in a population of children without pulmonary hypertension who had undergone MDCT was performed. RESULTS: The MPA-to-AA ratio was statistically significantly higher in children of all ages than in adults. We would, therefore, submit that the normal MPA-to-AA ratio in children on MDCT is greater than 1 and closer to 1.09. CONCLUSION: The demonstration of an MPA segment that is slightly larger than the AA in children undergoing MDCT should not suggest a diagnosis of pulmonary arterial hypertension.
OBJECTIVE: This study was performed to ascertain whether the adult ratio of 1:1 of the diameter of the main pulmonary artery (MPA) to the diameter of the ascending aorta (AA) (referred to hereafter as the MPA-to-AA ratio) on MDCT is applicable to children. MATERIALS AND METHODS: Our hypothesis, which is based on experiential observation, is that the MPA-to-AA ratio would be higher than 1 in healthy children. A retrospective analysis of vessel calibers in a population of children without pulmonary hypertension who had undergone MDCT was performed. RESULTS: The MPA-to-AA ratio was statistically significantly higher in children of all ages than in adults. We would, therefore, submit that the normal MPA-to-AA ratio in children on MDCT is greater than 1 and closer to 1.09. CONCLUSION: The demonstration of an MPA segment that is slightly larger than the AA in children undergoing MDCT should not suggest a diagnosis of pulmonary arterial hypertension.
Authors: Paul J Critser; Nara S Higano; Jean A Tkach; Emilia S Olson; David R Spielberg; Paul S Kingma; Robert J Fleck; Sean M Lang; Ryan A Moore; Michael D Taylor; Jason C Woods Journal: Am J Respir Crit Care Med Date: 2020-01-01 Impact factor: 21.405
Authors: Nara S Higano; Alister J Bates; Chamindu C Gunatilaka; Erik B Hysinger; Paul J Critser; Russel Hirsch; Jason C Woods; Robert J Fleck Journal: Pediatr Radiol Date: 2022-02-05