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
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 · 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 · 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.
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AJR Am J Roentgenol · Oct 1997
Blunt abdominal trauma in children: impact of CT on operative and nonoperative management.
The purpose of this study was to evaluate the impact of CT on operative management of children examined after blunt abdominal trauma. ⋯ CT rarely influenced the decision for operative intervention in children who sustained blunt abdominal trauma. CT findings affected the decision for operative intervention in most children with hollow viscus injury; however, CT findings affected such a decision in only a small subset of children with solid viscus injury. Normal abdominal CT findings strongly predicted a lack of subsequent deterioration requiring operative intervention.