AJR. American journal of roentgenology
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AJR Am J Roentgenol · Dec 2007
Clinical TrialFrequency and severity of acute allergic-like reactions to gadolinium-containing i.v. contrast media in children and adults.
The purpose of our study was to determine the frequency and severity of acute allergic-like reactions to i.v.-administered gadolinium-containing contrast media in children and adults. ⋯ Adult and pediatric acute allergic-like reactions to i.v.-administered gadolinium-containing contrast media are rare. Most of these reactions are mild; however, moderate and severe reactions that require immediate management do occur.
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AJR Am J Roentgenol · Dec 2007
Percutaneous sonographically guided radiofrequency ablation of medium-sized fibroids: feasibility study.
The purpose of this study was to assess the feasibility and safety of percutaneous radiofrequency ablation under sonographic guidance as a unique procedure in the management of symptomatic uterine myomas. ⋯ Percutaneous sonographically guided radiofrequency ablation alone is a feasible and efficient procedure in the management of medium-sized uterine myomas.
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The purpose of this study was to perform imaging of cartilage at high resolution with a high signal-to-noise ratio (SNR) with a combination of iterative decomposition of water and fat with echo asymmetry and least-squares estimation (IDEAL) with parallel imaging at 3 T and spoiled gradient echo (SPGR) imaging. The findings with the combined technique were compared with those obtained with conventional fat-saturated SPGR imaging. ⋯ Compared with fat-saturated SPGR, IDEAL-SPGR imaging combined with parallel imaging at 3 T provides robust fat-water separation and significant improvement in cartilage SNR. Use of IDEAL-SPGR also led to dramatic improvement in cartilage-fluid contrast-to-noise ratio compared with fat-saturated SPGR imaging. Thus, use of IDEAL-SPGR may improve the accuracy of cartilage volume measurements and detection of cartilage surface defects. Excellent evaluation of the morphologic features of the knee cartilage with high-resolution, high-SNR images can be performed in 5 minutes.
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AJR Am J Roentgenol · Dec 2007
Diffusion-weighted imaging of the appendicular skeleton with a non-Carr-Purcell-Meiboom-Gill single-shot fast spin-echo sequence.
The objective of our study was to prospectively evaluate the signal-to-noise ratio (SNR) improvement in diffusion-weighted imaging (DWI) of the appendicular skeleton with the use of a newly developed non-Carr-Purcell-Meiboom-Gill (non-CPMG) single-shot fast spin-echo (SSFSE) sequence and to evaluate its effect on apparent diffusion coefficient (ADC) measurements. ⋯ The non-CPMG SSFSE technique provides a significant improvement over the currently used EPI-based DWI technique and has the potential to be a powerful tool in imaging the appendicular skeleton.
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AJR Am J Roentgenol · Dec 2007
Is hand injection of central venous catheters for contrast-enhanced CT safe in children?
Our objective is to review our safety experience with hand injection of central venous catheters for administration of i.v. contrast material for CT in children. ⋯ Administration of i.v. contrast material by means of hand injection led to damage of four central venous catheters during a 6-year period at our institution (0.3% of central venous catheters hand injected during that time). In addition to the growing evidence of the safety of power injection of i.v. contrast material in central venous catheters, the potential danger of hand injection of central venous catheters should be considered when policies are made concerning the delivery of i.v. contrast material via central venous catheters.