Pediatric radiology
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We present a web-based pediatric CT dose tool that estimates effective dose based on dose length product, patient age and region of body scanned. The tool also provides an estimate of additional lifetime risk of cancer from CT exams. These estimations are based on the interpolation of factors from published methods. The calculator serves as an educational tool that can be used by radiologists and clinicians to better understand CT dose and its associated risks.
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Pediatric radiology · Nov 2010
Case ReportsContralateral hemimicrencephaly in neonatal hemimegalencephaly.
Identification of abnormalities in the contralateral hemisphere in patients with hemimegalencephaly is critical in their management. In this report, we present a 5-day-old neonate with hemimegalencephaly who demonstrated an enlarged ipsilateral cerebral hemisphere and diffuse volume loss in the contralateral hemisphere on conventional MR imaging sequences. ⋯ In addition, the white matter of the contralateral hemisphere demonstrated elevated lactate and increased mean diffusivity compared to published normative data, supporting the abnormal conventional MR findings. Advanced MR neuroimaging techniques may help further confirm and characterize abnormalities in the smaller contralateral hemisphere in neonatal hemimegalencephaly.
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Osteochondromas are the most common benign bone tumours. Nevertheless, their origin and biological behaviour are poorly understood. Rarely, spontaneous regression of osteochondromas may occur. We report the case of a 9-year-old girl with a solitary osteochondroma of the femur that regressed almost completely within 4 years, a fact that should be taken into account when deciding the management of these lesions, especially in young children.