AJR. American journal of roentgenology
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AJR Am J Roentgenol · Dec 2014
Comparative StudyMicrosimulation model of CT versus MRI surveillance of Bosniak IIF renal cystic lesions: should effects of radiation exposure affect selection of imaging strategy?
The objective of this study was to quantify the effects of radiation-induced cancer risks in patients with Bosniak category IIF lesions undergoing CT versus MRI surveillance. ⋯ Microsimulation modeling shows that radiation-induced cancer risks from CT surveillance for Bosniak IIF lesions minimally affect life expectancy. However, as progressively younger patients are considered, increasing radiation risks merit stronger consideration of MRI surveillance.
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AJR Am J Roentgenol · Dec 2014
Clinical TrialAssessment of 1 mSv urinary tract stone CT with model-based iterative reconstruction.
The purpose of this study was to evaluate stone detection, assessment of secondary signs of stone disease, and diagnostic confidence utilizing submillisievert CT with model-based iterative reconstruction (MBIR) in a North American population with diverse body habitus. ⋯ Aggressively dose-reduced (~1 mSv) MBIR scans detected most urinary tract stones of 3 mm or larger but underperformed the low-dose reference standard (3-4 mSv) scans in small (<3 mm) stone detection and diagnostic confidence.
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AJR Am J Roentgenol · Dec 2014
Controlled Clinical TrialSurvival, efficacy, and safety of small versus large doxorubicin drug-eluting beads TACE chemoembolization in patients with unresectable HCC.
The purpose of this study was to investigate the overall survival, efficacy, and safety of small (100-300 µm) versus large (300-500 and 500-700 µm) doxorubicin drug-eluting beads transarterial chemoembolization (DEB TACE) in patients with unresectable hepatocellular carcinoma (HCC). ⋯ TACE with 100-300 µm sized DEB is associated with significantly higher survival rate and lower complications than TACE with 300-500 and 500-700 µm sized DEB.
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AJR Am J Roentgenol · Dec 2014
Volumetric analysis of colonic distention according to patient position at CT colonography: diagnostic value of the right lateral decubitus series.
The purpose of this study was to compare total colonic gas volume and segmental luminal distention according to patient position on CT colonography (CTC), as well as to determine which two views should constitute the routine protocol. ⋯ The right lateral decubitus position consistently yields the best colonic distention at CTC and significantly improves evaluation of the sigmoid colon. Prone distention was the worst, particularly as BMI increased. Routine supine and decubitus positioning should be considered for standard CTC protocols, particularly in obese individuals. Automated volumetric analysis provides for rapid objective assessment of colonic distention.
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Key points. 1. CT is used to confirm the diagnosis of acute pancreatitis when the diagnosis is in doubt and to differentiate acute interstitial pancreatitis from necrotizing pancreatitis, which is a key element of the updated Atlanta nomenclature. The acute interstitial variety accounts for 90-95% of cases, with acute necrotizing pancreatitis accounting for the remaining cases. 2. ⋯ Mild acute pancreatitis has neither acute complications nor organ failure. Moderate-severity acute pancreatitis is associated with acute complications or organ failure lasting fewer than 48 hours. Severe acute pancreatitis is characterized by single- or multiorgan failure persisting for greater than 48 hours.