Dr. Peter Quagliano

CT
Contrast-mixing protocol improves GI opacification on CT
Many imaging facilities have developed different protocols for opacification of the gastrointestinal (GI) tract before CT of the abdomen or pelvis. In this article, Dr. Peter Quagliano offers his formula for diluting and administering ionic iodinated contrast for optimal performance in these scans.
July 18, 2013
2013 07 18 14 47 36 591 Quagliano Contrast 400 20130718215157
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Ultrasound images depict a 56-year-old man with obesity (body mass index, 42) and steatosis (MRI-PDFF, 10.4%), who underwent ultrasound attenuation coefficient (AC) measurement due to participation in the present study. The unit displays color-coded confidence map (left) and AC map (on right) in side-by-side manner. The confidence map indicates quality of acquired AC signals and is set like traffic lights: green indicates good quality acquisition, yellow indicates warning, and red indicates low quality. Areas with low quality are left blank on the AC map. The image shows multiple circular ROIs placed at depths below the liver capsule of 2, 2.5, 3, and 4 cm. All ROIs are 3.5 cm in size. The confidence map threshold is set at 20%. AC measurements (in units of dB/cm/MHz) were extracted from all ROIs (excluding voxels without assigned color on the AC map) and decrease with greater ROI depth.
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Ultrasound AC measures help detect liver steatosis
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