The advent of fast CT scanners with lower radiation doses has resulted in rapid growth in the numbers of cardiac CTs being performed in children. This has also increased the number of CTs interpreted by cardiologists, similar to adult cardiac CT. Pediatric cardiac CT demonstrates multiple potential extracardiac variants and pathology that may occur in conjunction with congenital heart disease (CHD). Prior publications in adult cohorts demonstrate a wide-range and incidence of extracardiac findings (6-39%) but the prevalence in children is unknown. Therefore, the purpose of this abstract is to describe incidence, distribution and significance of the extracardiac findings found in pediatric cardiac CT at a tertiary referral center. Read More

Meeting name: SPR 2020 Annual Meeting & Postgraduate Course , 2020

Authors: Sassoon Daniel, Malone Ladonna, Weinman Jason, Mcgraw Marty, Barker Alex, Browne Lorna

Keywords: cardiac, extracardiac

4D flow MRI with full coverage of the heart and proximal vessels is a powerful tool to understand hemodynamic pathology arising from congenital heart disease (CHD) and subsequent surgery; however, scan times often exceed 10 minutes thereby limiting widespread adoption in pediatrics. Decreasing scan time using compressed-SENSE (CS), a combination of conventional parallel imaging (SENSE) and randomized spatial undersampling, shows promise over SENSE alone. However, both the feasibility and its effect on accurate flow quantification in pediatrics has not been evaluated. This study investigated the feasibility of CS for pediatric 4D flow MRI to quantify flow indices used in risk stratification of CHD such as coarctation or pulmonary regurgitation, in comparison with SENSE. Read More

Meeting name: SPR 2020 Annual Meeting & Postgraduate Course , 2020

Authors: Fujiwara Takashi, Browne Lorna, Malone Ladonna, Lu Quin, Fonseca Brian, Dimaria Michael, Barker Alex

Keywords: 4D flow, Compressed SENSE, Congenital heart disease

Previous studies show that phase contrast MRI (PC-MRI) can successfully measure fetal blood flow in late gestation singleton fetuses. To date there is a paucity of data quantifying fetal blood flow of twin or early gestational age pregnancies (~19 weeks). Twin-twin transfusion syndrome (TTTS) is a rare complication of monochorionic pregnancies that is believed to result from inequal flow distribution between fetuses. In this novel investigation, we utilized PC-MRI to investigate fetal aortic flow in early gestational age fetuses with TTTS or selective Intrauterine Growth Restriction (sIUGR). We compared flow distribution between the smaller and larger fetus in each twin pair. Read More

Meeting name: SPR 2020 Annual Meeting & Postgraduate Course , 2020

Authors: Barhaghi Krystle, Schuchardt Eleanor, Schafer Michal, Meyers Mariana, Behrendt Nicholas, Barker Alex, Cuneo Bettina, Friesen Richard, Browne Lorna

Keywords: Fetal MRI, Twins, Phase Contrast MRI

<b>Introduction</b>: Conventional pediatric MRI acquisitions of a short axis (SA) stack for ventricular volumes typically requires one breath-hold per slice, resulting in multiple coordinated breath-holds under anesthesia to acquire the entire stack. Here, we aim to validate a compressed sensing approach to reduce breath-holding during SA balanced steady state free precession (bSSFP) cine imaging. Equivalency is tested via qualitative image scoring and global volumes compared to conventional bSSFP cine imaging. Read More

Meeting name: SPR 2020 Annual Meeting & Postgraduate Course , 2020

Authors: Naresh Nivedita, Browne Lorna, Barker Alex, Malone Ladonna, Fujiwara Takashi, Hulseberg-dwyer Emma, Mcgee Janet, Lu Quin, Twite Mark, Dimaria Michael, Fonseca Brian

Keywords: Compressed Sensing, Cardiac Function, Anesthesia