AJR. American journal of roentgenology
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AJR Am J Roentgenol · Dec 1997
Coarctation of the aorta: collateral flow assessment with phase-contrast MR angiography.
The purpose of this report is to describe a new use of MR imaging in coarctation of the aorta. The specific question addressed was how well collateral blood flow in intercostal arteries, as determined by phase-contrast MR angiography, correlated with findings during surgery or catheterization in patients with coarctation of the aorta. ⋯ Phase-contrast MR angiography is an excellent technique for detecting the presence or absence of collateral blood flow in the intercostal arteries of patients with coarctation of the aorta. Knowing whether collateral blood flow is present in patients with narrowing of the juxtaductal aorta should help assess the clinical hemodynamic significance of the coarctation.
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AJR Am J Roentgenol · Nov 1997
Comparative StudyComparison of HASTE and segmented-HASTE sequences with a T2-weighted fast spin-echo sequence in the screening evaluation of the brain.
The purpose of this study was to evaluate the neuroradiologic application of half-Fourier acquisition single-shot turbo spin-echo (HASTE) and segmented-HASTE (s-HASTE) sequences in comparison with a T2-weighted fast spin-echo sequence. ⋯ The HASTE and s-HASTE sequences afford substantial time reduction and also decrease motion artifacts and thus have potential advantages for neuroradiologic application, especially in uncooperative or unsedated children. The s-HASTE sequence may be preferable to the HASTE sequence because of fewer blurring artifacts and higher T2 contrast. However, small hyperintense and hypointense lesions may be overlooked when HASTE and s-HASTE sequences are used.
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AJR Am J Roentgenol · Nov 1997
Radiologic placement of subcutaneous infusion chest ports for long-term central venous access.
The technical success and complications associated with radiologic placement of subcutaneous implantable chest ports for long-term central venous access were evaluated. ⋯ With the benefit of both sonographic and fluoroscopic guidance, subcutaneous implantable chest ports can be inserted by radiologists with equal or lower complication rates than those reported in surgical series. Image-guided insertion of chest ports should replace rather than supplement unguided placement.
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AJR Am J Roentgenol · Oct 1997
Aspiration after administration of oral contrast material in children undergoing abdominal CT for trauma.
The practice of routinely administering oral contrast material to children undergoing abdominal CT for blunt trauma is controversial, primarily because of the increased risk of aspiration. The purpose of this study was to determine how often aspiration occurs in this population of children. ⋯ No clinically symptomatic episodes of aspiration pneumonia were found in 50 pediatric patients with blunt trauma who were given oral contrast material for abdominal CT. Although one of the children had CT findings that suggested clinically silent aspiration of oral contrast material, no evidence was found that administration of oral contrast material was harmful.
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AJR Am J Roentgenol · Oct 1997
Nonsurgical management of patients with blunt hepatic injury: efficacy of transcatheter arterial embolization.
We evaluated the efficacy of transcatheter arterial embolization (TAE) for patients with blunt hepatic injury. ⋯ TAE is an effective alternative to surgery for patients with high-grade liver injury.