AJR. American journal of roentgenology
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AJR Am J Roentgenol · Jul 2008
Comparative StudyIntraindividual comparison of contrast media concentrations for combined abdominal and thoracic MDCT.
The purpose of this study was an intraindividual comparison of the degrees of MDCT contrast enhancement achieved with agents containing 300 and 370 mg I/mL. ⋯ Given equivalent iodine load and delivery rate, the use of 300 mg I/mL contrast medium results in better contrast enhancement than use of 370 mg I/mL contrast medium in CT of the chest. For the portal venous phase of CT of the abdomen, there was no significant difference in contrast enhancement for the two concentrations of iodine.
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AJR Am J Roentgenol · Jul 2008
Does a combination of dose modulation with fast gantry rotation time limit CT image quality?
The objective of our study was to determine the degree to which CT tube current saturates (tube current reaching its maximal capacity) if dose modulation and fast gantry rotation speeds are used when imaging the abdomen and pelvis and to determine whether saturated tube current affects image quality. ⋯ On the MDCT scanners investigated, when dose modulation is combined with fast tube rotation times, tube current saturation occurs with weaker x-ray tubes resulting in deterioration of image quality.