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Society for Pediatric Radiology – Poster Archive

Michael Callahan

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Showing 3 Abstracts.

Pediatric urolithiasis is an important and increasingly prevalent cause of pediatric morbidity and hospital admission. Ultrasound is the recommended primary imaging modality for suspected urolithiasis in children and this view is endorsed by all of the largest pediatric and urological societies. There is however widespread use of CT as a first line study for abdominal pain in many institutions involved in pediatric care, many of whom are free standing hospitals delivering predominantly adult care. The purpose of this educational review is to outline the state-of-the-art imaging modalities and methods for diagnosing urolithiasis in children and to suggest an imaging algorithm for best practice. Read More

Meeting name: IPR 2016 Conjoint Meeting & Exhibition , 2016

Authors: Colleran Gabrielle, Callahan Michael, Chow Jeanne

Keywords: Urolithiasis, Ultrasound, Computed Tomography, ALARA, Dose optimized

Identify the most common diagnoses of superficial head and neck lesions in children under 4 years of age, and correlate imaging and pathologic findings. Read More

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

Authors: Murcia Diana, Myers Ross, Estroff Judy, Callahan Michael

Keywords: infant, Tumor, Ultrasound

The purpose of this educational presentation is to demonstrate ultrasound technique and characteristic sonographic findings of common superficial pediatric extremity soft tissue lesions. We also offer advice on how to differentiate benign from malignant lestions. Children frequently present with unexplained “lumps and bumps” on their extremities. These lesions are often invisible on radiography; MRI might require use of sedation; and CT exposes the child to radiation and often requires iodinated contrast. Ultrasound (US) is a cost-effective, radiation-free, and dynamic method to evaluate superficial soft tissue lesions. We discuss choice of transducer based on lesion location. We explain why a multifrequency transducer, which allows for the evaluation of both superficial (higher frequency spectrum of the transducer) and deeper (lower frequency spectrum of the transducer) components of the lesion is important. The use of compound imaging is explained, as multiple angles of insonation are combined to provide a more complete image of the structure being interrogated. For lesions involving the hands or feet, we explain the water-bath technique. Water is an excellent medium for ultrasound waves and will minimize artifacts from air and inadequate surface contact that plague evaluation of the distal extremities. We then discuss characteristic sonographic appearance of the following conditions: vascular anomalies, osteomyelitis and subperiosteal abscess, hematoma, subcutaneous granuloma annulare, Pilomatricoma, lipoma, ganglion and Baker cyst, muscle hernia, osteochondroma, foreign bodies, and malignant conditions. Read More

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

Authors: Thapa Mahesh, Ojeda Patricia, Otjen Jeffrey, Ngo Anh-vu, Callahan Michael

Keywords: ultrasound, benigh, malignant