Publications by authors named "Hanna Hebelka"

Article Synopsis
  • The study aimed to evaluate the clinical feasibility of ultra-high-frequency abdominal ultrasound (UHFUS) scans on both preterm and term infants.
  • Both healthy term newborns and a small group of preterm infants were examined using UHFUS and conventional ultrasound (CUS), revealing significant differences in measurements, particularly in gastrointestinal wall thickness.
  • The results indicate that UHFUS may provide more accurate diagnostics for gastrointestinal conditions in infants, potentially enhancing medical assessments compared to traditional CUS.
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Study Design: Prospective cohort study.

Objective: Investigate load-induced effects in lumbar intervertebral discs (IVDs) and differences between low back pain (LBP) patients and controls.

Summary Of Background Data: T2-map values, obtained from quantitative MRI sequences, reflect IVD tissue composition and integrity.

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Study Design: Clinical experimental diagnostic study.

Objective: The objective of the study was to investigate cervical spine dynamics including changes in the cervical foramina in patients experiencing intermittent arm radiculopathy.

Background: Cervical foraminal stenosis is a frequent cause of radicular arm pain.

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Objectives: Increasing gradient performance on modern magnetic resonance imaging scanners has profoundly reduced the attainable diffusion and echo times for clinically available pulsed-gradient spin echo (PGSE) sequences. This study investigated how this may impact the measured apparent diffusion coefficient (ADC), which is considered an important diagnostic marker for differentiation between normal and abnormal brain tissue and for therapeutic follow-up.

Materials And Methods: Diffusion time and echo time dependence of the ADC were evaluated on a high-performance 3 T magnetic resonance imaging scanner.

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Background: Liver transplantation is the state-of-the-art curative treatment for end-stage liver disease. Imaging is a key element in the detection of postoperative complications. So far, limited data is available regarding the best radiologic approach to monitor children after liver transplantation.

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Article Synopsis
  • Liver transplantation is the primary treatment for end-stage liver disease, but there's limited information on the best imaging practices for monitoring children during the procedure.
  • A survey conducted by the European Society of Pediatric Radiology gathered feedback from 22 centers across 11 countries regarding their intraoperative imaging techniques.
  • Results showed that all centers use intraoperative ultrasound (US), mainly relying on color Doppler, but there's significant variation in how the ultrasound is conducted, including who operates the equipment and how often imaging is performed.
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Article Synopsis
  • The study explored the relationships between annular fissures, vertebral and endplate changes, and Modic changes in patients with low back pain using CT and MRI imaging techniques.
  • Out of 204 intervertebral discs punctured for evaluation, a high percentage exhibited outer annular fissures, with many being linked to moderate disc degeneration and advanced adjacent degeneration.
  • Most Modic changes were associated with significant disc degeneration, but a notable percentage of discs with outer annular fissures did not show severe changes in adjacent vertebrae or endplates.
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Background: Liver transplantation is the state-of-the-art curative treatment in end-stage liver disease. Imaging is a key element for successful organ-transplantation to assist surgical planning. So far, only limited data regarding the best radiological approach to prepare children for liver transplantation is available.

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Diagnosing cervical foraminal stenosis with intermittent arm radiculopathy is challenging due to discrepancies between MRI findings and symptoms. This can be attributed to the fact that MRI images are often obtained in a relaxed supine position. This study aims to evaluate the feasibility of the Dynamic MRI Compression System (DMRICS) and to assess possible changes in cervical foramina, with both quantitative measurements and qualitative grading systems, with MRI during a simulated Spurling test.

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Objective: To characterize the discs and vertebrae in detail over time in a group of adolescent individuals with varying training doses using magnetic resonance imaging (MRI).

Method: Thirty-five students were recruited from regular high schools (n=13) as well as schools with athlete competitive skiing programmes (n = 22). The thoraco-lumbar spine of all individuals was examined at baseline and at 2-year follow-up using the same 1.

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Article Synopsis
  • The plain radiograph has been a key tool for over a century in measuring and predicting pediatric hip conditions, utilizing classic metrics like the acetabular index and center-edge angle.
  • There is growing inconsistency in the terminology surrounding these measurements, leading to confusion with the use of synonyms and varying definitions in research.
  • This review seeks to clarify historical definitions and common radiographic landmarks, while addressing the variability in contemporary usage to improve comparison of treatment outcomes and scientific analysis.
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Background: It is unknown how shear wave dispersion (SWD) is displayed in pediatric liver transplant recipients and not fully elucidated how ultrasound shear wave elastography (2D-SWE) display within this cohort, which is important to determine to improve noninvasive surveillance of these patients. The study aimed to compare SWE and SWD values with histopathology in pediatric liver recipients.

Methods: Forty-eight pediatric liver recipients were examined with SWE in conjunction with an elective liver biopsy (clinically without complication).

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Article Synopsis
  • * This study explored the potential of radiomics—a method that analyzes medical images—to find associations between vertebral changes and annular fissures in 61 LBP patients using MRI and discography.
  • * Key findings identified three significant radiomic texture features in the vertebrae that could help distinguish between healthy and affected areas, potentially leading to better understanding and diagnosis of LBP.
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The Fontan operation is a lifesaving procedure for patients with functional single-ventricle congenital heart disease, where hypoplastic left heart syndrome is the most frequent anomaly. Hemodynamic changes following Fontan circulation creation are now increasingly recognized to cause multiorgan affection, where the development of a chronic liver disease, Fontan-associated liver disease (FALD), is one of the most important morbidities. Virtually, all patients with a Fontan circulation develop liver congestion, resulting in fibrosis and cirrhosis, and most patients experience childhood onset.

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Objectives: To examine the occurrence of magnetic resonance imaging (MRI) changes in the thoracolumbar spine among elite climbing athletes.

Methods: All climbers of the Swedish national sport climbing team (n = 8), and individuals having trained for selection to the national team (n = 11), were prospectively included. A control group, matched in age and sex, were recruited.

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Background: It is an ongoing debate whether fusion surgery is superior to non-operative treatment for non-specific low back pain (LBP) in terms of patient outcome. Further, the evidence for how signs of intervertebral disc (IVD) degeneration on magnetic resonance imaging (MRI) correlate with patient outcome is insufficient. Longitudinal studies of low back pain (LBP) patients are thus of interest for increased knowledge.

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Article Synopsis
  • * A new method combines textural features from MR images with AI-based models, achieving 100% sensitivity and 97% specificity in identifying fissures compared to traditional CT discography.
  • * The proposed technique was more accurate than conventional methods for identifying fissures, suggesting it could enhance clinical diagnosis and research on back pain.
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Degeneration alters the structural components of the disc and its mechanical behavior. Understanding this pathophysiological process is of great importance, as it may lead to back pain. However, non-invasive methods to characterize the disc mechanics in vivo are lacking.

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Modic changes (MCs) are gaining increased interest as potential generators of low back pain (LBP). The current aim was to investigate possible spinal loading effects on the MRI signal in MCs in patients with LBP. Supine lumbar MRIs were performed and immediately repeated with axial loading in 100 LBP patients.

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Background: Young athletes are at increasing risk for spinal column injuries due to overloading the spine with excessive sports activities, with potential development of complications later in life.

Purpose: The purpose of this 2-year follow-up study of young elite skiers and non-athletes was to investigate any potential change in the thoraco-lumbar findings on MRI and to outline any change in back pain prevalence with continuing sporting activity and age.

Study Design: Longitudinal cross-sectional study.

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Article Synopsis
  • A study aimed to assess how effective multiple ultrasound techniques are at non-invasively identifying liver issues like fibrosis, inflammation, and fat accumulation in children.
  • The research involved comparing ultrasound measurements (shear wave elastography, shear wave dispersion, and attenuation imaging) with liver biopsies from 32 pediatric patients and 15 controls.
  • Results indicated that ultrasound could differentiate between fibrosis grades and inflammation levels, suggesting it may be a viable method for evaluating liver conditions, but further studies are needed to confirm these findings.
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Lumbar foraminal stenosis is a common cause of lumbar radiculopathy and conventionally assessed with magnetic resonance imaging (MRI) in supine-positioned patients. An MRI acquired during spine loading may unmask pathology not otherwise revealed in a relaxed position. Therefore, we investigated how spine loading during MRI affects lumbar foramina.

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Purpose: Foraminal stenosis is commonly investigated with radiological methods in patients with radiating pain in extremities. However, there is a lack of consensus regarding the methodology to assess compression of the nerve roots. This systematic review was performed to identify validated classification systems for foraminal stenosis in the lumbar and cervical spine based on magnetic resonance imaging (MRI).

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