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Typically, magnetic resonance imaging (MRI) analysis is performed on magnitude data, and multiple echo T2 data consist of numerous images of the same slice taken with different echo spacing, giving voxel-wise temporal sampling of the noise as the signals decay according to T2 relaxation. Magnitude T2 decay data has Rician distributed noise which is(More)
QUESTION A child recently presented to my office with lower limb petechiae, arthralgia, and abdominal pain characteristic of Henoch-Schönlein purpura (HSP). Will systemic corticosteroids help relieve these symptoms and prevent potential HSP complications such as intussusception and nephritis? ANSWER Henoch-Schönlein purpura is a common and self-limiting(More)
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