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Mckinnon K, Jardine C, Barclay G, Thrippleton MJ, Abel S, Wardlaw JM, Bastin ME, Whalley HC, Richardson H, Boardman JP. An unexpected ferromagnetic foreign body in a paediatric research participant undergoing 3T MRI. BMJ Case Rep 2024; 17:e258969. [PMID: 38272527 PMCID: PMC10826474 DOI: 10.1136/bcr-2023-258969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2024] Open
Abstract
Metallic foreign bodies (FBs) are a safety risk during MRI. Here, we describe a boy in early childhood with an unexpected ferromagnetic FB discovered during a research brain MRI. Safety precautions included written and oral safety screening checklists and visual check during a structured safety pause. During introduction to the scanner, he was lifted to look at the bore. Staff became aware of an object flying into the bore. The child reached for his ear, and a 5 mm diameter ball bearing was found in the bore. The child had no external injury. We have introduced a 0.1 T handheld magnet to check for metallic FBs not known to the parent. FBs are a common paediatric emergency department presentation, particularly in younger children or those with cognitive or behavioural problems. This case highlights the importance of safety screening in paediatric MRI scanning, along with its fallibility.
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Affiliation(s)
- Katie Mckinnon
- Centre for Reproductive Health, Institute for Regeneration and Repair, University of Edinburgh, Edinburgh, UK
| | | | - Gayle Barclay
- Edinburgh Imaging Facility, University of Edinburgh, Edinburgh, UK
| | - Michael J Thrippleton
- Edinburgh Imaging Facility, University of Edinburgh, Edinburgh, UK
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Selina Abel
- School of Philosophy, Psychology, and Language Sciences, University of Edinburgh, Edinburgh, UK
| | - Joanna M Wardlaw
- Edinburgh Imaging Facility, University of Edinburgh, Edinburgh, UK
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Mark E Bastin
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Heather C Whalley
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
| | - Hilary Richardson
- School of Philosophy, Psychology, and Language Sciences, University of Edinburgh, Edinburgh, UK
| | - James P Boardman
- Centre for Reproductive Health, Institute for Regeneration and Repair, University of Edinburgh, Edinburgh, UK
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK
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Mckinnon K, Galdi P, Blesa-Cábez M, Sullivan G, Vaher K, Corrigan A, Hall J, Jiménez-Sánchez L, Thrippleton M, Bastin ME, Quigley AJ, Valavani E, Tsanas A, Richardson H, Boardman JP. Association of Preterm Birth and Socioeconomic Status With Neonatal Brain Structure. JAMA Netw Open 2023; 6:e2316067. [PMID: 37256618 PMCID: PMC10233421 DOI: 10.1001/jamanetworkopen.2023.16067] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Accepted: 04/17/2023] [Indexed: 06/01/2023] Open
Abstract
Importance Preterm birth and socioeconomic status (SES) are associated with brain structure in childhood, but the relative contributions of each during the neonatal period are unknown. Objective To investigate associations of birth gestational age (GA) and SES with neonatal brain morphology by testing 3 hypotheses: GA and SES are associated with brain morphology; associations between SES and brain morphology vary with GA; and associations between SES and brain structure and morphology depend on how SES is operationalized. Design, Setting, and Participants This cohort study recruited participants from November 2016 to September 2021 at a single center in the United Kingdom. Participants were 170 extremely and very preterm infants and 91 full-term or near-term infants. Exclusion criteria were major congenital malformation, chromosomal abnormality, congenital infection, cystic periventricular leukomalacia, hemorrhagic parenchymal infarction, and posthemorrhagic ventricular dilatation. Exposures Birth GA and SES, operationalized at the neighborhood level (using the Scottish Index of Multiple Deprivation), the family level (using parental education and occupation), and subjectively (World Health Organization Quality of Life measure). Main Outcomes and Measures Brain volume (85 parcels) and 5 whole-brain cortical morphology measures (gyrification index, thickness, sulcal depth, curvature, surface area) at term-equivalent age (median [range] age, 40 weeks, 5 days [36 weeks, 2 days to 45 weeks, 6 days] and 42 weeks [38 weeks, 2 days to 46 weeks, 1 day] for preterm and full-term infants, respectively). Results Participants were 170 extremely and very preterm infants (95 [55.9%] male; 4 of 166 [2.4%] Asian, 145 of 166 [87.3%] White) and 91 full-term or near-term infants (50 [54.9%] male; 3 of 86 [3.5%] Asian, 78 of 86 [90.7%] White infants) with median (range) birth GAs of 30 weeks, 0 days (22 weeks, 1 day, to 32 weeks, 6 days) and 39 weeks, 4 days (36 weeks, 3 days, to 42 weeks, 1 day), respectively. In fully adjusted models, birth GA was associated with a higher proportion of brain volumes (27 of 85 parcels [31.8%]; β range, -0.20 to 0.24) than neighborhood-level SES (1 of 85 parcels [1.2%]; β = 0.17 [95% CI, -0.16 to 0.50]) or family-level SES (maternal education: 4 of 85 parcels [4.7%]; β range, 0.09 to 0.15; maternal occupation: 1 of 85 parcels [1.2%]; β = 0.06 [95% CI, 0.02 to 0.11] respectively). There were interactions between GA and both family-level and subjective SES measures on regional brain volumes. Birth GA was associated with cortical surface area (β = 0.10 [95% CI, 0.02 to 0.18]) and gyrification index (β = 0.16 [95% CI, 0.07 to 0.25]); no SES measure was associated with cortical measures. Conclusions and Relevance In this cohort study of UK infants, birth GA and SES were associated with neonatal brain morphology, but low GA had more widely distributed associations with neonatal brain structure than SES. Further work is warranted to elucidate the mechanisms underlying the association of both GA and SES with early brain development.
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Affiliation(s)
- Katie Mckinnon
- Medical Research Council Centre for Reproductive Health, University of Edinburgh, Edinburgh, United Kingdom
| | - Paola Galdi
- Medical Research Council Centre for Reproductive Health, University of Edinburgh, Edinburgh, United Kingdom
| | - Manuel Blesa-Cábez
- Medical Research Council Centre for Reproductive Health, University of Edinburgh, Edinburgh, United Kingdom
| | - Gemma Sullivan
- Medical Research Council Centre for Reproductive Health, University of Edinburgh, Edinburgh, United Kingdom
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Kadi Vaher
- Medical Research Council Centre for Reproductive Health, University of Edinburgh, Edinburgh, United Kingdom
| | - Amy Corrigan
- Medical Research Council Centre for Reproductive Health, University of Edinburgh, Edinburgh, United Kingdom
| | - Jill Hall
- Medical Research Council Centre for Reproductive Health, University of Edinburgh, Edinburgh, United Kingdom
| | | | - Michael Thrippleton
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Mark E. Bastin
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - Alan J. Quigley
- Department of Radiology, Royal Hospital for Children and Young People, Edinburgh, United Kingdom
| | - Evdoxia Valavani
- Usher Institute, Edinburgh Medical School, University of Edinburgh, Edinburgh, United Kingdom
| | - Athanasios Tsanas
- Usher Institute, Edinburgh Medical School, University of Edinburgh, Edinburgh, United Kingdom
- Alan Turing Institute, London, United Kingdom
| | - Hilary Richardson
- School of Philosophy, Psychology, and Language Sciences, University of Edinburgh, Edinburgh, United Kingdom
| | - James P. Boardman
- Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, United Kingdom
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Mckinnon K, Hunt A, Knight K. Does screen time affect recovery from concussion in adolescents? Arch Dis Child 2021; 106:720-722. [PMID: 33214236 DOI: 10.1136/archdischild-2020-320767] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 10/29/2020] [Accepted: 11/01/2020] [Indexed: 12/26/2022]
Affiliation(s)
- Katie Mckinnon
- Paediatrics, North Middlesex University Hospital, London, UK
| | - Alexander Hunt
- Paediatrics, North Middlesex University Hospital, London, UK
| | - Katie Knight
- Paediatric Emergency Medicine, North Middlesex University Hospital, London, UK
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Mckinnon K, Kendall GS, Tann CJ, Dyet L, Sokolska M, Baruteau KP, Marlow N, Robertson NJ, Peebles D, Srinivasan L. Biometric assessments of the posterior fossa by fetal MRI: A systematic review. Prenat Diagn 2020; 41:258-270. [PMID: 33251640 DOI: 10.1002/pd.5874] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 10/07/2020] [Accepted: 11/19/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND Posterior fossa abnormalities (PFAs) are commonly identified within routine screening and are a frequent indication for fetal magnetic resonance imaging (MRI). Although biometric measurements of the posterior fossa (PF) are established on fetal ultrasound and MRI, qualitative visual assessments are predominantly used to differentiate PFAs. OBJECTIVES This systematic review aimed to assess 2-dimensional (2D) biometric measurements currently in use for assessing the PF on fetal MRI to delineate different PFAs. METHODS The protocol was registered (PROSPERO ID CRD42019142162). Eligible studies included T2-weighted MRI PF measurements in fetuses with and without PFAs, including measurements of the PF, or other brain areas relevant to PFAs. RESULTS 59 studies were included - 6859 fetuses had 62 2D PF and related measurements. These included linear, area and angular measurements, representing measures of PF size, cerebellum/vermis, brainstem, and supratentorial measurements. 11 measurements were used in 10 or more studies and at least 1200 fetuses. These dimensions were used to characterise normal for gestational age, diagnose a range of pathologies, and predict outcome. CONCLUSION A selection of validated 2D biometric measurements of the PF on fetal MRI may be useful for identification of PFA in different clinical settings. Consistent use of these measures, both clinically and for research, is recommended.
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Affiliation(s)
- Katie Mckinnon
- Neonatal Department, University College London Hospitals NHS Foundation Trust, London, UK.,Institute for Women's Health, University College London, London, UK
| | - Giles S Kendall
- Neonatal Department, University College London Hospitals NHS Foundation Trust, London, UK.,Institute for Women's Health, University College London, London, UK
| | - Cally J Tann
- Neonatal Department, University College London Hospitals NHS Foundation Trust, London, UK.,MARCH Centre, London School of Hygiene and Tropical Medicine, London, UK
| | - Leigh Dyet
- Neonatal Department, University College London Hospitals NHS Foundation Trust, London, UK.,Institute for Women's Health, University College London, London, UK
| | - Magdalena Sokolska
- Institute for Women's Health, University College London, London, UK.,Medical Physics Department, University College London Hospitals NHS Foundation Trust, London, UK
| | - Kelly Pegoretti Baruteau
- Institute for Women's Health, University College London, London, UK.,Radiology Department, University College London Hospitals NHS Foundation Trust, London, UK
| | - Neil Marlow
- Neonatal Department, University College London Hospitals NHS Foundation Trust, London, UK.,Institute for Women's Health, University College London, London, UK
| | - Nicola J Robertson
- Neonatal Department, University College London Hospitals NHS Foundation Trust, London, UK.,Institute for Women's Health, University College London, London, UK
| | - Donald Peebles
- Institute for Women's Health, University College London, London, UK.,Obstetric Department, University College London Hospitals NHS Foundation Trust, London, UK
| | - Latha Srinivasan
- Neonatal Department, University College London Hospitals NHS Foundation Trust, London, UK.,Institute for Women's Health, University College London, London, UK
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Mckinnon K, Waddington A, Schofield J, Davis T. Positive feedback in the paediatric emergency department. Arch Dis Child 2019; 104:1120-1122. [PMID: 31352370 DOI: 10.1136/archdischild-2019-317904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/17/2019] [Indexed: 11/04/2022]
Affiliation(s)
- Katie Mckinnon
- Paediatric Emergency Department, Royal London Hospital, London, UK
| | - Ana Waddington
- Paediatric Emergency Department, Royal London Hospital, London, UK
| | | | - Tessa Davis
- Paediatric Emergency Department, Royal London Hospital, London, UK
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Mckinnon K, Huertas-Ceballos A. Developmental follow-up of children and young people born preterm, NICE guideline 2017. Arch Dis Child Educ Pract Ed 2019; 104:221-223. [PMID: 29802095 DOI: 10.1136/archdischild-2017-314044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Revised: 04/02/2018] [Accepted: 04/17/2018] [Indexed: 11/04/2022]
Affiliation(s)
- Katie Mckinnon
- Paediatric Department, Royal London Hospital, London, UK
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Mitra S, Kendall GS, Bainbridge A, Sokolska M, Dinan M, Uria-Avellanal C, Price D, Mckinnon K, Gunny R, Huertas-Ceballos A, Golay X, Robertson NJ. Proton magnetic resonance spectroscopy lactate/N-acetylaspartate within 2 weeks of birth accurately predicts 2-year motor, cognitive and language outcomes in neonatal encephalopathy after therapeutic hypothermia. Arch Dis Child Fetal Neonatal Ed 2019; 104:F424-F432. [PMID: 30322975 DOI: 10.1136/archdischild-2018-315478] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 08/13/2018] [Accepted: 09/07/2018] [Indexed: 11/03/2022]
Abstract
OBJECTIVE Brain proton (1H) magnetic resonance spectroscopy (MRS) lactate/N-acetylaspartate (Lac/NAA) peak area ratio is used for prognostication in neonatal encephalopathy (NE). At 3 Tesla in NE babies, the objectives were to assess: (1) sensitivity and specificity of basal ganglia and thalamus (BGT) 1H MRS Lac/NAA for the prediction of Bayley III outcomes at 2 years using optimised metabolite fitting (Tarquin) with threonine and total NAA; (2) prediction of motor outcome with diffusion-weighted MRI; (3) BGT Lac/NAA correlation with the National Institute of Child Health and Human Development (NICHD) MRI score. SUBJECTS AND METHODS 55 (16 inborn, 39 outborn) infants at 39w+5 d (35w+5d-42w+0d) with NE admitted between February 2012 and August 2014 to University College London Hospitals for therapeutic hypothermia underwent MRI and 1H MRS at 3T on day 2-14 (median day 5). MRIs were scored. Bayley III was assessed at 24 (22-26) months. RESULTS 16 babies died (1 inborn, 15 outborn); 20, 19 and 21 babies had poor motor, cognitive and language outcomes. Using a threshold of 0.39, sensitivity and specificity of BGT Lac/NAA for 2-year motor outcome was 100% and 97%, cognition 90% and 97% and language 81% and 97%, respectively. Sensitivity and specificity for motor outcome of mean diffusivity (threshold 0.001 mm2/s) up to day 9 was 72% and 100% and fractional anisotropy (threshold 0.198) was 39% and 94%, respectively. Lac/NAA correlated with BGT injury on NICHD scores (2A, 2B, 3). CONCLUSION BGT Lac/NAA on 1H MRS at 3T within 14 days accurately predicts 2-year motor, cognitive and language outcome and may be a marker directing decisions for therapies after cooling.
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Affiliation(s)
- Subhabrata Mitra
- Institute for Women's Health, University College London, London, UK
| | - Giles S Kendall
- Women and Children, University College London NHS Foundation Trust, London, UK
| | - Alan Bainbridge
- Medical Physics and Engineering, University College London NHS Foundation Trust, London, UK
| | - Magdalena Sokolska
- Medical Physics and Engineering, University College London NHS Foundation Trust, London, UK
| | - Mary Dinan
- Women and Children, University College London NHS Foundation Trust, London, UK
| | | | - David Price
- Medical Physics and Engineering, University College London NHS Foundation Trust, London, UK
| | - Katie Mckinnon
- Women and Children, University College London NHS Foundation Trust, London, UK
| | - Roxana Gunny
- Women and Children, University College London NHS Foundation Trust, London, UK
| | | | - Xavier Golay
- Institute of Neurology, Queen Square, University College London, London, UK
| | - Nicola J Robertson
- Institute for Women's Health, University College London, London, UK.,Division of Neonatology, Sidra Medicine, Doha, Qatar
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