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Start Over Author "Hansel J" Journal pediatric radiology
166 results on '"Hansel J"'

29. Lymphatic anomalies in congenital heart disease

Author

Karen I. Ramirez-Suarez, Luis Octavio Tierradentro-García, David M. Biko, Hansel J. Otero, Ammie M. White, Yoav Dori, Christopher L. Smith, Seth Vatsky, and Jordan B. Rapp

Subjects
Pediatrics, Perinatology and Child Health, Radiology, Nuclear Medicine and imaging
Published
2022
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38. Computed tomography of the airways and lungs in congenital heart disease

Author

Ammie M. White, Hansel J. Otero, Jordan B. Rapp, and David M. Biko

Subjects
medicine.medical_specialty, medicine.diagnostic_test, Heart disease, business.industry, Arteriovenous malformation, Lymphangiectasia, respiratory system, medicine.disease, respiratory tract diseases, Tracheobronchomalacia, Pediatrics, Perinatology and Child Health, Parenchyma, Angiography, medicine, Radiology, Nuclear Medicine and imaging, Radiology, Airway, business, Neuroradiology
Abstract

The presence of airway and lung disease in children with congenital heart disease is commonly observed with both cardiac CT angiography and routine chest CT. In this review we discuss abnormalities encountered on CT imaging of the chest beyond the heart and central vasculature, focusing on the airways, lung parenchyma and peripheral vasculature. Preoperative and postoperative findings are reviewed as well.

Published
2021
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39. Radiologists should support non-radiologist point-of-care ultrasonography in children: a case for involvement and collaboration

Author

Martin P. Grobusch, Savvas Andronikou, Lisa C. Ruby, Sabine Bélard, Hansel J. Otero, Charlotte C Heuvelings, Infectious diseases, AII - Infectious diseases, and APH - Global Health

Subjects
medicine.medical_specialty, business.industry, Point-of-Care Systems, Point of care ultrasonography, Radiologists, Pediatrics, Perinatology and Child Health, medicine, Humans, Radiology, Nuclear Medicine and imaging, Medical physics, Child, business, Ultrasonography, Neuroradiology
Published
2021
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41. State-of-the-art imaging for lymphatic evaluation in children

Author

Karen I. Ramirez-Suarez, Luis Octavio Tierradentro-Garcia, Joseph A. Stern, Yoav Dori, Fernando A. Escobar, Hansel J. Otero, Jordan B. Rapp, Christopher L. Smith, Ganesh Krishnamurthy, and David M. Biko

Subjects
Pediatrics, Perinatology and Child Health, Radiology, Nuclear Medicine and imaging
Published
2022
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43. Dynamic contrast-enhanced magnetic resonance lymphangiography

Author

Karen I Ramirez-Suarez, Yoav Dori, Luis Octavio Tierradentro-García, Christopher L. Smith, Fernando Escobar, Ganesh Krishnamurthy, Hansel J. Otero, Jordan B Rapp, and David M. Biko

Subjects
medicine.medical_specialty, medicine.diagnostic_test, business.industry, Chylothorax, Magnetic resonance imaging, Lymphatic flow, medicine.disease, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, 0302 clinical medicine, Lymphatic system, Lymphedema, Pediatrics, Perinatology and Child Health, Chylopericardium, Medicine, Radiology, Nuclear Medicine and imaging, Enteropathy, Radiology, business, 030217 neurology & neurosurgery, Neuroradiology
Abstract

Lymphatic flow disorders include a broad spectrum of abnormalities that can originate in the lymphatic or the venous system. The development of these disorders is multifactorial and is most commonly associated with congenital heart diseases and palliative surgeries that these patients undergo. Central lymphatic disorders might be secondary to traumatic leaks, lymphatic overproduction, conduction abnormalities or lymphedema, and they can progress to perfusion anomalies. Several imaging modalities have been used to visualize the lymphatic system. However, the imaging of central lymphatic flow has always been challenging. Dynamic contrast-enhanced magnetic resonance lymphangiography (DCMRL) allows for visualization of central lymphatic flow disorders and has been recently applied for the assessment of plastic bronchitis, protein-losing enteropathy, chylothorax and chylopericardium, among other lymphatic disorders. The hepatic and mesenteric accesses are innovative and promising techniques for better identification and understanding of these abnormalities. The main objectives of this review are to discuss the physiology and anatomy of the lymphatic system and review the current uses of DCMRL in the diagnosis and management of lymphatic flow disorders.

Published
2021
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44. Dual-source computed tomography protocols for the pediatric chest - scan optimization techniques

Author

Jordan B. Rapp, Victor M. Ho-Fung, Karen I. Ramirez, Ammie M. White, Hansel J. Otero, and David M. Biko

Subjects
Pediatrics, Perinatology and Child Health, Radiology, Nuclear Medicine and imaging
Abstract

The gold standard for pediatric chest imaging remains the CT scan. An ideal pediatric chest CT has the lowest radiation dose with the least motion degradation possible in a diagnostic scan. Because of the known inherent risks and costs of anesthesia, non-sedate options are preferred. Dual-source CTs are currently the fastest, lowest-dose CT scanners available, utilizing an ultra-high-pitch mode resulting in sub-second CTs. The dual-energy technique, available on dual-source CT scanners, gathers additional information such as pulmonary blood volume and includes relative contrast enhancement and metallic artifact reduction, features that are not available in high-pitch flash mode. In this article we discuss the benefits and tradeoffs of dual-source CT scan modes and tips on image optimization.

Published
2022

45. Magnetic resonance urography: a practical approach to preparation, protocol and interpretation.

Author

Otero, Hansel J., Elsingergy, Mohamed M., and Back, Susan J.

Subjects
*MAGNETIC resonance, *URINARY organs, *URINARY catheters, *IONIZING radiation, *RETENTION of urine, *KIDNEY physiology
Abstract

Magnetic resonance urography (MRU) is an important MRI application that provides noninvasive comprehensive morphological and functional evaluation of the kidneys and urinary tract. It can be used to assess congenital anomalies of the kidney and urinary tract, which often present as urinary tract dilation. In children, MRU allows for high tissue contrast and high spatial resolution without requiring ionizing radiation. Magnetic resonance urography requires patient preparation in the form of pre-examination intravenous hydration, placement of a urinary catheter, and the administration of diuretics at the time of the exam. The imaging protocol is based on T2-weighted images for anatomical assessment and dynamic post-contrast images for functional evaluation. These images are then used to generate quantitative and graphic results including contrast transit and excretion time as well as to calculate differential renal function. This review focuses on a simple approach to pediatric MRU acquisition and interpretation based on clinical cases and the authors' experience. [ABSTRACT FROM AUTHOR]

Published
2023
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46. State-of-the-art imaging for lymphatic evaluation in children.

Author

Ramirez-Suarez, Karen I., Tierradentro-Garcia, Luis Octavio, Stern, Joseph A., Dori, Yoav, Escobar, Fernando A., Otero, Hansel J., Rapp, Jordan B., Smith, Christopher L., Krishnamurthy, Ganesh, and Biko, David M.

Subjects
LYMPHATICS, LYMPHANGIOGRAPHY, MAGNETIC resonance, LYMPHATIC diseases, JUVENILE diseases
Abstract

The lymphatic system has been poorly understood and its importance neglected for decades. Growing understanding of lymphatic flow pathophysiology through peripheral and central lymphatic flow imaging has improved diagnosis and treatment options in children with lymphatic diseases. Flow dynamics can now be visualized by different means including dynamic contrast-enhanced magnetic resonance lymphangiography (DCMRL), the current standard technique to depict central lymphatics. Novel imaging modalities including intranodal, intrahepatic and intramesenteric DCMRL are quickly evolving and have shown important advances in the understanding and guidance of interventional procedures in children with intestinal lymphatic leaks. Lymphatic imaging is gaining importance in the radiologic and clinical fields and new techniques are emerging to overcome its limitations. [ABSTRACT FROM AUTHOR]

Published
2023
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47. Dual-source computed tomography protocols for the pediatric chest — scan optimization techniques.

Author

Rapp, Jordan B., Ho-Fung, Victor M., Ramirez, Karen I., White, Ammie M., Otero, Hansel J., and Biko, David M.

Subjects
COMPUTED tomography, MATHEMATICAL optimization, BLOOD volume, SCANNING systems, RADIATION doses
Abstract

The gold standard for pediatric chest imaging remains the CT scan. An ideal pediatric chest CT has the lowest radiation dose with the least motion degradation possible in a diagnostic scan. Because of the known inherent risks and costs of anesthesia, non-sedate options are preferred. Dual-source CTs are currently the fastest, lowest-dose CT scanners available, utilizing an ultra-high-pitch mode resulting in sub-second CTs. The dual-energy technique, available on dual-source CT scanners, gathers additional information such as pulmonary blood volume and includes relative contrast enhancement and metallic artifact reduction, features that are not available in high-pitch flash mode. In this article we discuss the benefits and tradeoffs of dual-source CT scan modes and tips on image optimization. [ABSTRACT FROM AUTHOR]

Published
2023
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48. Can lessons from the COVID-19 pandemic help define a strategy for global pediatric radiology education?

Author

Hansel J. Otero, Erika L. Bass, and Jennifer Nicholas

Subjects
Medical education, Internationality, Coronavirus disease 2019 (COVID-19), SARS-CoV-2, business.industry, Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), Pneumonia, Viral, COVID-19, Pediatrics, Betacoronavirus, Pediatric Radiology, Radiology Nuclear Medicine and imaging, Pediatrics, Perinatology and Child Health, Pandemic, Commentary, Humans, Medicine, Radiology, Nuclear Medicine and imaging, Pediatrics, Perinatology, and Child Health, Child, Coronavirus Infections, Radiology, business, Pandemics
Published
2020
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49. Lymphatic anomalies in congenital heart disease

Author

Karen I, Ramirez-Suarez, Luis Octavio, Tierradentro-García, David M, Biko, Hansel J, Otero, Ammie M, White, Yoav, Dori, Christopher L, Smith, Seth, Vatsky, and Jordan B, Rapp

Subjects
Heart Defects, Congenital, Lymphatic System, Lymphatic Abnormalities, Humans, Lymphography, Child, Chylothorax, Magnetic Resonance Imaging
Abstract

Congenital heart disease can lead to various lymphatic complications including traumatic leaks, lymphatic overproduction, conduction abnormalities or lymphedema. Advancements in the imaging of central lymphatics and guided interventions have improved outcomes in these children. Dynamic contrast-enhanced magnetic resonance (MR) lymphangiography allows for the assessment of abnormal lymphatic drainage. This technique is preferred for evaluating lymphatic conditions such as plastic bronchitis, chylothorax, chyloptysis, chylopericardium, protein-losing enteropathy and chylous ascites, among other lymphatic disorders. In this review, we discuss lymphatic abnormalities encountered on MRI in children with congenital heart disease. We also briefly review treatment options.

Published
2021

50. Spectral imaging in the pediatric chest: past, present and future

Author

Jordan B, Rapp, David M, Biko, Ammie M, White, Karen I, Ramirez-Suarez, and Hansel J, Otero

Subjects
Photons, Phantoms, Imaging, Humans, Thorax, Child, Tomography, X-Ray Computed
Abstract

Computed tomography technology continues to undergo evolution and improvement with each passing decade. From its inception in 1971, to the advent of commercially available dual-energy CT just over a decade ago, and now to the latest innovation, photon-counting detector CT, CT's utility for resolving and discriminating tissue types improves. In this review we discuss the impact of spectral imaging, including dual-energy CT and the recently available photon-counting detector CT, on the imaging of the pediatric chest. We describe the current capabilities and future directions of CT imaging, encompassing both the lungs and the surrounding tissues.

Published
2021

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