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• W2166869917 abstract "To determine if contrast material dose for abdominal multidetector computed tomography (CT), as determined by using body weight (BW), overestimates the amount of contrast material required in heavier patients.Institutional review committee approval and patients' written informed consent were obtained. CT images of the abdomen were obtained by using 2 mL per kilogram of BW of intravenous contrast material (300 mg/mL iodine) injected at 4 mL/sec in 161 consecutive patients (age range, 28-90 years; mean age, 63 years; 95 men, 66 women). CT scans were initiated 45 and 150 seconds after aortic enhancement increased by 50 HU. The patients were divided into low (37-54 kg) and high (55-75 kg) BW groups. The DeltaHU/I, where DeltaHU is change in CT number and I is iodine dose in grams, and adjusted maximum hepatic enhancement (DeltaHU/[I/kg]) were assessed for correlation with BW, body mass index (BMI), and body fat percentage (BFP) by using linear regression.DeltaHU/I correlated (P < .001) inversely with BW in the aorta (r = -0.78) and liver (r = -0.80) and with BMI in the aorta (r = -0.59) and liver (r = -0.61) on portal venous phase images. Regression formula for the low BW group was DeltaHU/I = 4.1 - .044 x BW (P < .001) and for the high BW group was DeltaHU/I = 2.7 - .017 x BW (P < .001), suggesting that the amount of contrast material required with increased BW is less in the high BW group. Adjusted maximum hepatic enhancement directly correlated with BFP (r = 0.25, P < .01).Excessive contrast material may inadvertently be given in heavier patients when the dose is determined by patient BW. Contrast material dose may need to be tailored in individual patients by using BFP." @default.
• W2166869917 created "2016-06-24" @default.
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• W2166869917 date "2008-12-01" @default.
• W2166869917 modified "2023-10-07" @default.
• W2166869917 title "Abdominal Multidetector CT in Patients with Varying Body Fat Percentages: Estimation of Optimal Contrast Material Dose" @default.
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• W2166869917 doi "https://doi.org/10.1148/radiol.2492080033" @default.
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