AJR. American journal of roentgenology
-
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.
-
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.
-
AJR Am J Roentgenol · Dec 2007
Radiologic diagnosis of cerebral venous thrombosis: self-assessment module.
The educational objectives of this self-assessment module are for the participant to exercise, self-assess, and improve his or her understanding of the radiologic diagnosis of cerebral venous thrombosis.
-
AJR Am J Roentgenol · Nov 2007
Multicenter StudyDiagnostic performance of gadobenate dimeglumine enhanced MR angiography of the iliofemoral and calf arteries: a large-scale multicenter trial.
The purpose of this study was to compare gadobenate dimeglumine-enhanced MR angiography and unenhanced time-of-flight MR angiography for the detection of significant peripheral arterial occlusive disease using digital subtraction angiography as our reference standard. ⋯ Improved diagnostic performance and reproducibility are achievable with gadobenate dimeglumine-enhanced MR angiography in patients with peripheral arterial occlusive disease.
-
AJR Am J Roentgenol · Nov 2007
Comparative StudyRelative threshold of detection of active arterial bleeding: in vitro comparison of MDCT and digital subtraction angiography.
The objective of our study was to determine the relative sensitivity and the lowest threshold of bleeding detectable with digital subtraction angiography (DSA) and with MDCT using an in vitro physiologic system. ⋯ In vitro, i.v. contrast-enhanced MDCT is more sensitive than first-order aortic branch-selective DSA in detecting active hemorrhage unless the catheter position is highly superselective and is close to the bleeding artery. These results suggest that MDCT can be used as the initial imaging technique in the diagnosis of active hemorrhage if the clinical condition of the patient allows.