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Morin CE, Karakas P, Vorona G, Sreedher G, Brian JM, Chavhan GB, Chung T, Griffin LM, Kaplan SL, Moore M, Schenker K, Subramanian S, Aquino M. The Society for Pediatric Radiology Magnetic Resonance Imaging and Emergency and Trauma Imaging Committees' consensus protocol recommendation for rapid MRI for evaluating suspected appendicitis in children. Pediatr Radiol 2024; 54:12-19. [PMID: 38049531 DOI: 10.1007/s00247-023-05819-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 11/15/2023] [Accepted: 11/17/2023] [Indexed: 12/06/2023]
Abstract
The imaging evaluation of acute abdominal pain in children with suspected appendicitis has evolved to include rapid abdominopelvic MRI (rMRI) over recent years. Through a collaborative effort between the Magnetic Resonance Imaging (MRI) and Emergency and Trauma Imaging Committees of the Society for Pediatric Radiology (SPR), we conducted a survey on the utilization of rMRI to assess practice specifics and protocols. Subsequently, we present a proposed consensus rMRI protocol derived from the survey results, literature review, and discussion and consensus between committee members.
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Affiliation(s)
- Cara E Morin
- Department of Radiology, Cincinnati Children's Hospital and University of Cincinnati College of Medicine, 3333 Burnet Ave, Cincinnati, OH, 45229, USA.
| | | | - Gregory Vorona
- Department of Radiology, The Children's Hospital of Richmond at Virginia Commonwealth University, Richmond, USA
| | | | - James M Brian
- Department of Radiology, Penn State Children's Hospital, Penn State Health, Penn State College of Medicine, Hershey, USA
| | - Govind B Chavhan
- Diagnostic Imaging Department, The Hospital for Sick Children and Department of Medical Imaging, University of Toronto, Toronto, Canada
| | - Taylor Chung
- UCSF Benioff Children's Hospital Oakland, Oakland, USA
| | | | - Summer L Kaplan
- Department of Radiology Children's Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, USA
| | - Michael Moore
- Department of Radiology, Nemours Children's Health, Wilmington, DE, USA
| | - Kathleen Schenker
- Department of Radiology, Nemours Children's Hospital, Wilmington, DE, USA
| | | | - Michael Aquino
- Section of Pediatric Imaging, Cleveland Clinic Imaging Institute and Cleveland Clinic Lerner College of Medicine of Case Western University, Cleveland, USA
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2
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Sirén A, Nyman M, Syvänen J, Mattila K, Hirvonen J. Clinical outcome following magnetic resonance imaging as first-line imaging in low-impact pediatric spine trauma: a single-center retrospective observational study. Pediatr Radiol 2023; 53:2269-2280. [PMID: 37518674 PMCID: PMC10562339 DOI: 10.1007/s00247-023-05721-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 07/09/2023] [Accepted: 07/10/2023] [Indexed: 08/01/2023]
Abstract
BACKGROUND Pediatric spinal trauma is rare, but the consequences of a missed injury can be devastating. Medical imaging is often needed in addition to physical examination. Conventional radiographs are widely recommended, but their negative predictive value is limited. Computed tomography (CT) is more sensitive but has a higher radiation dose. Magnetic resonance imaging (MRI) has superior soft tissue contrast and lacks ionizing radiation, but it is more expensive and time-consuming. Thus, the debate regarding the most suitable imaging method is still ongoing. OBJECTIVE This study examined the ability of MRI to exclude injuries requiring surgical treatment as a first-line imaging method in low-impact pediatric spine trauma. MATERIALS AND METHODS We retrospectively reviewed the medical records and imaging data of children (under 18 years old) who had suspected spinal trauma and were scanned using MRI in our emergency radiology department over a period of 8 years. We assessed the ability of MRI to detect unstable injuries by searching for later occurrences of primarily missed injuries requiring surgery. RESULTS Of 396 patients (median age 12 years, range 0-17), 114 (29%) had MRI findings suggesting an acute injury. Bony injuries were detected in 78 patients (20%) and ligamentous or other soft tissue injuries in 82 patients (21%). In the subgroup of 376 patients (median age 12 years, range 0-17) with at least 6 months of clinical follow-up, no missed injuries demanding surgical intervention or immobilization occurred after spinal MRI as first-line imaging. No adverse events related to MRI or anesthesia occurred. CONCLUSION MRI can detect injuries requiring surgical treatment as a first-line imaging method in suspected low-impact pediatric spinal trauma and is safe to use in this selected population.
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Affiliation(s)
- Aapo Sirén
- Department of Radiology, University of Turku and Turku University Hospital, Kiinamyllynkatu 4-8, 20520, Turku, Finland.
| | - Mikko Nyman
- Department of Radiology, University of Turku and Turku University Hospital, Kiinamyllynkatu 4-8, 20520, Turku, Finland
| | - Johanna Syvänen
- Department of Pediatric Orthopedic Surgery, University of Turku and Turku University Hospital, Turku, Finland
| | - Kimmo Mattila
- Department of Radiology, University of Turku and Turku University Hospital, Kiinamyllynkatu 4-8, 20520, Turku, Finland
| | - Jussi Hirvonen
- Department of Radiology, University of Turku and Turku University Hospital, Kiinamyllynkatu 4-8, 20520, Turku, Finland
- Medical Imaging Center, Department of Radiology, Tampere University and Tampere University Hospital, Tampere, Finland
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3
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Michaud V, Morel B, Adamsbaum C, Bruneau B, Lenoir M, Petit P, Leiber LM, Blondiaux E, Brunereau L, Remérand F, Brisse HJ, Laffon M. French survey of sedation practices for pediatric magnetic resonance and computed tomography imaging. Pediatr Radiol 2023; 53:1669-1674. [PMID: 36932258 DOI: 10.1007/s00247-023-05635-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 02/15/2023] [Accepted: 02/17/2023] [Indexed: 03/19/2023]
Abstract
BACKGROUND Pediatric magnetic resonance imaging (MRI) and computed tompgraphy (CT) require patient immobility and therefore often require sedation or general anesthesia of patients. Consensus on these procedures is lacking in France. OBJECTIVE Thus, the aim of this study was to describe the current sedation practices for pediatric MRI and CT in France. MATERIAL AND METHODS From January 2019 to December 2019, an online questionnaire was delivered by electronic mail to a representative radiologist in 60 pediatric radiology centers registered by the French-speaking pediatric and prenatal imaging society. Questions included protocols, drugs used, monitoring and side effects. RESULTS Representatives of 40 of the 60 (67%) radiology centers responded to the survey. Among them, 31 performed sedation including 17 (55%) centers where radiologists performed sedation without anesthesiologists present during the procedure. The premedication drugs were hydroxyzine (n = 8, 80%) and melatonin (n = 2, 20%), Sedation drugs used for children ages 0 to 6 years old were pentobarbital (n = 9, 60%), midazolam (n = 2, 13%), chloral hydrate (n = 2, 13%), diazepam (n = 1, 6.5%) and chlorpromazine (n = 1, 6.5%). A written sedation protocol was available in 10/17 (59%) centers. In 6/17 (35%) centers, no monitoring was used during the procedures. Blood pressure monitoring and capnography were rarely used (< 10%) and post-sedation monitoring was heterogeneous. No life-threatening adverse effect was reported, but 6 centers reported at least one incident per year. CONCLUSION For half of the responding radiology centers, radiologists performed sedation alone in agreement with the local anesthesiology team. Sedation procedures and monitoring were heterogenous among centers. Adjustment and harmonization of the practices according to the capacity of each center may be useful.
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Affiliation(s)
- Valentin Michaud
- Anesthesia and Intensive Care Department, University Hospital of Tours, 2 Boulevard Tonnelé, 37044, Tours, France.
| | - Baptiste Morel
- UMR 1253, iBrain, Inserm, University of Tours, 37000, Tours, France
| | - Catherine Adamsbaum
- Pediatric Radiology Department, University of Paris Saclay, AP-HP, Bicêtre Hospital, 94270, Le Kremlin Bicêtre, France
| | - Bertrand Bruneau
- Radiology Department, University Hospital of Rennes, 35200, Rennes, France
| | - Marion Lenoir
- Radiology Department, University Medical Center, 25000, Besançon, France
| | - Philippe Petit
- Pediatric and prenatal imaging unit, Aix Marseille University, La Timone-Enfants Hospital, 13005, Marseille, France
| | - Louis-Marie Leiber
- Department of Radiology, University Hospital of Angers, 49000, Angers, France
| | - Eléonore Blondiaux
- Department of Radiology, Trousseau Hospital, APHP, Sorbonne University, 75012, Paris, France
| | - Laurent Brunereau
- Radiology Department, University Hospital of Tours, 37000, Tours, France
| | - Francis Remérand
- Anesthesia and Intensive Care Department, University Hospital of Tours, 2 Boulevard Tonnelé, 37044, Tours, France
| | - Hervé J Brisse
- Imaging Department, Institut Curie, 75005, Paris, France
| | - Marc Laffon
- Anesthesia and Intensive Care Department, University Hospital of Tours, 2 Boulevard Tonnelé, 37044, Tours, France
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Sirén A, Nyman M, Syvänen J, Mattila K, Hirvonen J. Emergency MRI in Spine Trauma of Children and Adolescents-A Pictorial Review. CHILDREN (BASEL, SWITZERLAND) 2023; 10:1094. [PMID: 37508591 PMCID: PMC10378627 DOI: 10.3390/children10071094] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 06/19/2023] [Accepted: 06/20/2023] [Indexed: 07/30/2023]
Abstract
Severe spinal trauma is uncommon in the pediatric population, but due to the potentially devastating consequences of missed injury, it poses a diagnostic challenge in emergency departments. Diagnostic imaging is often needed to exclude or confirm the injury and to assess its extent. Magnetic resonance imaging (MRI) offers an excellent view of both bony and soft tissue structures and their traumatic findings without exposing children to ionizing radiation. Our pictorial review aims to demonstrate the typical traumatic findings, physiological phenomena, and potential pitfalls of emergency MRI in the trauma of the growing spine.
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Affiliation(s)
- Aapo Sirén
- Department of Radiology, University of Turku and Turku University Hospital, Kiinamyllynkatu 4-8, 20520 Turku, Finland
| | - Mikko Nyman
- Department of Radiology, University of Turku and Turku University Hospital, Kiinamyllynkatu 4-8, 20520 Turku, Finland
| | - Johanna Syvänen
- Department of Pediatric Orthopedic Surgery, University of Turku and Turku University Hospital, 20520 Turku, Finland
| | - Kimmo Mattila
- Department of Radiology, University of Turku and Turku University Hospital, Kiinamyllynkatu 4-8, 20520 Turku, Finland
| | - Jussi Hirvonen
- Department of Radiology, University of Turku and Turku University Hospital, Kiinamyllynkatu 4-8, 20520 Turku, Finland
- Medical Imaging Center, Department of Radiology, Tampere University and Tampere University Hospital, 33100 Tampere, Finland
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5
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Thacker PG, Iyer RS, Pace E, States LJ, Guillerman RP. Imaging of pediatric pulmonary tumors: A COG Diagnostic Imaging Committee/SPR Oncology Committee White Paper. Pediatr Blood Cancer 2023; 70 Suppl 4:e29964. [PMID: 36121877 PMCID: PMC10641895 DOI: 10.1002/pbc.29964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 08/25/2022] [Accepted: 08/16/2022] [Indexed: 11/09/2022]
Abstract
Pediatric pulmonary malignancy can be primary or metastatic, with the latter being by far the more common. With a few exceptions, there are no well-established evidence-based guidelines for imaging pediatric pulmonary malignancies, although computed tomography (CT) is used in almost all cases. The aim of this article is to provide general imaging guidelines for pediatric pulmonary malignancies, including minimum standards for cross-sectional imaging techniques and specific imaging recommendations for select entities.
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Affiliation(s)
| | - Ramesh S. Iyer
- Department of Radiology, Seattle Children’s Hospital, University of Washington School of Medicine, Seattle, Washington
| | - Erika Pace
- Department of Radiology, The Royal Marsden NHS Foundation Trust, London, United Kingdom
| | - Lisa J. States
- Department of Radiology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
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Nurminen J, Heikkinen J, Happonen T, Nyman M, Sirén A, Vierula JP, Velhonoja J, Irjala H, Soukka T, Ivaska L, Mattila K, Hirvonen J. Pictorial Review of MRI Findings in Acute Neck Infections in Children. CHILDREN (BASEL, SWITZERLAND) 2023; 10:967. [PMID: 37371199 DOI: 10.3390/children10060967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 05/23/2023] [Accepted: 05/24/2023] [Indexed: 06/29/2023]
Abstract
Pediatric neck infections and their complications, such as abscesses extending to deep neck compartments, are potentially life-threatening acute conditions. Medical imaging aims to verify abscesses and their extensions and exclude other complications. Magnetic resonance imaging (MRI) has proven to be a useful and highly accurate imaging method in acute neck infections in children. Children and adults differ in terms of the types of acute infections and the anatomy and function of the neck. This pictorial review summarizes typical findings in pediatric patients with neck infections and discusses some difficulties related to image interpretation.
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Affiliation(s)
- Janne Nurminen
- Department of Radiology, University of Turku and Turku University Hospital, 20520 Turku, Finland
| | - Jaakko Heikkinen
- Department of Radiology, University of Turku and Turku University Hospital, 20520 Turku, Finland
| | - Tatu Happonen
- Department of Radiology, University of Turku and Turku University Hospital, 20520 Turku, Finland
| | - Mikko Nyman
- Department of Radiology, University of Turku and Turku University Hospital, 20520 Turku, Finland
| | - Aapo Sirén
- Department of Radiology, University of Turku and Turku University Hospital, 20520 Turku, Finland
| | - Jari-Pekka Vierula
- Department of Radiology, University of Turku and Turku University Hospital, 20520 Turku, Finland
| | - Jarno Velhonoja
- Department of Otorhinolaryngology-Head and Neck Surgery, University of Turku and Turku University Hospital, 20520 Turku, Finland
| | - Heikki Irjala
- Department of Otorhinolaryngology-Head and Neck Surgery, University of Turku and Turku University Hospital, 20520 Turku, Finland
| | - Tero Soukka
- Department of Oral and Maxillofacial Surgery, University of Turku, 20014 Turku, Finland
| | - Lauri Ivaska
- Department of Paediatrics and Adolescent Medicine, InFLAMES Research Flagship Center, University of Turku and Turku University Hospital, 20520 Turku, Finland
| | - Kimmo Mattila
- Department of Radiology, University of Turku and Turku University Hospital, 20520 Turku, Finland
| | - Jussi Hirvonen
- Department of Radiology, University of Turku and Turku University Hospital, 20520 Turku, Finland
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7
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Smriti V, Baheti AD, Shah S, Qureshi SS, Shetty N, Gala K, Kulkarni S, Raut A, Kamble V, Chinnaswamy G, Prasad M, C. P B, Ramadwar M, Singh S, Shukla A, Panwala H, Sahu A, Siddharth L, Kapadia T. Imaging Recommendations for Diagnosis, Staging, and Management of Pediatric Solid Tumors. Indian J Med Paediatr Oncol 2023. [DOI: 10.1055/s-0042-1759507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023] Open
Abstract
AbstractPaediatric extra-cranial solid tumours are one of the common causes for paediatric malignancies. Lack of appropriate imaging at presentation, staging and for follow-up is a major challenge for paediatric solid tumours. We have reviewed the paediatric solid tumour imaging protocols suggested by the major oncological societies/groups around the world (mainly the SIOP – Society International Pediatric Oncology, and the COG – Children's Oncology Group). We have adapted some of those protocols to develop imaging recommendations for the diagnosis, staging and management of extra-cranial solid tumours based on the treatment protocols followed in India.
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Affiliation(s)
- Vasundhara Smriti
- Department of Radiodiagnosis and Imaging, Homi Bhabha National Institute, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Akshay D. Baheti
- Department of Radiodiagnosis and Imaging, Homi Bhabha National Institute, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Sneha Shah
- Department of Nuclear Medicine and molecular imaging, Homi Bhabha National Institute, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Sajid S. Qureshi
- Division of Pediatric Surgical Oncology, Department of Surgical Oncology, Homi Bhabha National Institute, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Nanadan Shetty
- Department of Opthalmology, Homi Bhabha National Institute, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Kunal Gala
- Department of Intervention Radiology, Homi Bhabha National Institute, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Suyash Kulkarni
- Department of Intervention Radiology, Homi Bhabha National Institute, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Abhijit Raut
- Department of Radiodiagnosis, Kokilaben Dhirubhai Ambani Hospital, Mumbai, Maharashtra, India
| | - Veenita Kamble
- Department of Radiodiagnosis, Kokilaben Dhirubhai Ambani Hospital, Mumbai, Maharashtra, India
| | - Girish Chinnaswamy
- Department of Pediatric Oncology, Homi Bhabha National Institute, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Maya Prasad
- Department of Pediatric Oncology, Homi Bhabha National Institute, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Badira C. P
- Department of Pediatric Oncology, Homi Bhabha National Institute, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Mukta Ramadwar
- Department of Pathology, Homi Bhabha National Institute, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Suryaveer Singh
- Department of Radiodiagnosis and Imaging, Homi Bhabha National Institute, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Anuradha Shukla
- Department of Radiodiagnosis and Imaging, Homi Bhabha National Institute, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Hirenkumar Panwala
- Department of Radiodiagnosis, SRCC Children's Hospital, Mumbai, Maharashtra, India
| | - Arpita Sahu
- Department of Radiodiagnosis and Imaging, Homi Bhabha National Institute, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Laskar Siddharth
- Department of Radiation Oncology, Homi Bhabha National Institute, Tata Memorial Hospital, Mumbai, Maharashtra, India
| | - Tejas Kapadia
- Children's X-ray Department/Academic Unit of Paediatric Radiology, Royal Manchester Children's Hospital, Manchester, United Kingdom
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Hirvonen J, Heikkinen J, Nyman M, Happonen T, Velhonoja J, Irjala H, Soukka T, Mattila K, Nurminen J. MRI of acute neck infections: evidence summary and pictorial review. Insights Imaging 2023; 14:5. [PMID: 36617619 PMCID: PMC9826778 DOI: 10.1186/s13244-022-01347-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 12/04/2022] [Indexed: 01/09/2023] Open
Abstract
Infection of the deep neck spaces is a life-threatening acute illness that requires prompt diagnosis and treatment. Magnetic resonance imaging (MRI) offers unsurpassed soft tissue discrimination and is therefore well suited for imaging neck infections. Recently, the feasibility, diagnostic accuracy, and clinical significance of this method have been documented in patients with acute neck infections. This review article summarizes the scientific evidence, provides a practical guide to image acquisition and interpretation, reviews the most common imaging findings, and discusses some difficult diagnoses and pitfalls in acute neck infections, to help both radiologists and clinicians in managing these critically ill patients.
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Affiliation(s)
- Jussi Hirvonen
- grid.1374.10000 0001 2097 1371Department of Radiology, University of Turku and Turku University Hospital, Turku, Finland ,grid.412330.70000 0004 0628 2985Medical Imaging Center, Department of Radiology, Tampere University and Tampere University Hospital, Tampere, Finland
| | - Jaakko Heikkinen
- grid.1374.10000 0001 2097 1371Department of Radiology, University of Turku and Turku University Hospital, Turku, Finland
| | - Mikko Nyman
- grid.1374.10000 0001 2097 1371Department of Radiology, University of Turku and Turku University Hospital, Turku, Finland
| | - Tatu Happonen
- grid.1374.10000 0001 2097 1371Department of Radiology, University of Turku and Turku University Hospital, Turku, Finland
| | - Jarno Velhonoja
- grid.1374.10000 0001 2097 1371Department of Otorhinolaryngology-Head and Neck Surgery, University of Turku and Turku University Hospital, Turku, Finland
| | - Heikki Irjala
- grid.1374.10000 0001 2097 1371Department of Otorhinolaryngology-Head and Neck Surgery, University of Turku and Turku University Hospital, Turku, Finland
| | - Tero Soukka
- grid.1374.10000 0001 2097 1371Department of Oral and Maxillofacial Surgery, University of Turku, Turku, Finland
| | - Kimmo Mattila
- grid.1374.10000 0001 2097 1371Department of Radiology, University of Turku and Turku University Hospital, Turku, Finland
| | - Janne Nurminen
- grid.1374.10000 0001 2097 1371Department of Radiology, University of Turku and Turku University Hospital, Turku, Finland
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9
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Imaging of Right Lower Quadrant Pain in Children and Adolescents: AJR Expert Panel Narrative Review. AJR Am J Roentgenol 2022; 220:767-779. [PMID: 36416395 DOI: 10.2214/ajr.22.28358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Right lower quadrant (RLQ) pain is a common clinical presentation in children, and accurate clinical diagnosis remains challenging given that this nonspecific presentation is associated with numerous surgical and nonsurgical conditions. The broad differential diagnosis varies by patient age and sex. Important considerations in the selection of a diagnostic imaging strategy include the sequencing, performance, and cost of tests. This article provides a comprehensive narrative review of the diagnostic imaging of RLQ pain in children and adolescents, including a discussion of the complementary roles of ultrasound, CT, and MRI; description of key imaging findings based on available evidence; and presentation of salient differential diagnoses. Subspecialized pediatric emergency medicine and surgical perspectives are also provided as further clinical insight into this common, but often challenging, scenario. Finally, the current status of imaging of RLQ pain in children and adolescents is summarized on the basis of expert consensus.
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Goebel CA, Brown E, Fahlbusch FB, Wagner AL, Buehler A, Raupach T, Hohmann M, Späth M, Burton N, Woelfle J, Schmidt M, Hartner A, Regensburger AP, Knieling F. High-resolution label-free mapping of murine kidney vasculature by raster-scanning optoacoustic mesoscopy: an ex vivo study. Mol Cell Pediatr 2022; 9:13. [PMID: 35788444 PMCID: PMC9253231 DOI: 10.1186/s40348-022-00144-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 05/06/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Chronic kidney disease (CKD) is a global burden affecting both children and adults. Novel imaging modalities hold great promise to visualize and quantify structural, functional, and molecular organ damage. The aim of the study was to visualize and quantify murine renal vasculature using label-free raster scanning optoacoustic mesoscopy (RSOM) in explanted organs from mice with renal injury. MATERIAL AND METHODS For the experiments, freshly bisected kidneys of alpha 8 integrin knock-out (KO) and wildtype mice (WT) were used. A total of n=7 female (n=4 KO, n=3 WT) and n=6 male animals (n=2 KO, n=4 WT) aged 6 weeks were examined with RSOM optoacoustic imaging systems (RSOM Explorer P50 at SWL 532nm and/or ms-P50 imaging system at 532 nm, 555 nm, 579 nm, and 606 nm). Images were reconstructed using a dedicated software, analyzed for size and vascular area and compared to standard histologic sections. RESULTS RSOM enabled mapping of murine kidney size and vascular area, revealing differences between kidney sizes of male (m) and female (f) mice (merged frequencies (MF) f vs. m: 52.42±6.24 mm2 vs. 69.18±15.96 mm2, p=0.0156) and absolute vascular area (MF f vs. m: 35.67±4.22 mm2 vs. 49.07±13.48 mm2, p=0.0036). Without respect to sex, the absolute kidney area was found to be smaller in knock-out (KO) than in wildtype (WT) mice (WT vs. KO: MF: p=0.0255) and showed a similar trend for the relative vessel area (WT vs. KO: MF p=0.0031). Also the absolute vessel areas of KO compared to WT were found significantly different (MF p=0.0089). A significant decrease in absolute vessel area was found in KO compared to WT male mice (MF WT vs. KO: 54.37±9.35 mm2 vs. 34.93±13.82 mm2, p=0.0232). In addition, multispectral RSOM allowed visualization of oxygenated and deoxygenated parenchymal regions by spectral unmixing. CONCLUSION This study demonstrates the capability of RSOM for label-free visualization of differences in vascular morphology in ex vivo murine renal tissue at high resolution. Due to its scalability optoacoustic imaging provides an emerging modality with potential for further preclinical and clinical imaging applications.
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Affiliation(s)
- Colin A Goebel
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany
| | - Emma Brown
- Department of Physics, University of Cambridge, Cambridge, UK.,Cancer Research UK Cambridge Institute, University of Cambridge, Cambridge, UK.,Washington University School of Medicine, St. Louis, USA
| | - Fabian B Fahlbusch
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany
| | - Alexandra L Wagner
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany
| | - Adrian Buehler
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany
| | - Thomas Raupach
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany
| | - Martin Hohmann
- Institute of Photonic Technologies, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Erlangen Graduate School in Advanced Optical Technologies, 91052, Erlangen, Germany
| | - Moritz Späth
- Institute of Photonic Technologies, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Erlangen Graduate School in Advanced Optical Technologies, 91052, Erlangen, Germany
| | | | - Joachim Woelfle
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany
| | - Michael Schmidt
- Institute of Photonic Technologies, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.,Erlangen Graduate School in Advanced Optical Technologies, 91052, Erlangen, Germany
| | - Andrea Hartner
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany
| | - Adrian P Regensburger
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany
| | - Ferdinand Knieling
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany.
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