AJR. American journal of roentgenology
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AJR Am J Roentgenol · May 2010
Fat-suppressed 3D T1-weighted gradient-echo imaging of the cartilage with a volumetric interpolated breath-hold examination.
The purpose of our study was to evaluate the feasibility of using fat-suppressed 3D volumetric interpolated breath-hold examination (VIBE) as a substitute for fat-suppressed 3D FLASH in cartilage MRI. ⋯ Fat-suppressed 3D VIBE is a promising substitute for fat-suppressed 3D FLASH as a more effective T1-weighted sequence in cartilage imaging.
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AJR Am J Roentgenol · May 2010
Cost-effectiveness of coronary CT angiography in evaluation of patients without symptoms who have positive stress test results.
Patients without symptoms who have positive stress test results are often referred for diagnostic catheter angiography in an evaluation for coronary artery disease (CAD). The purpose of this study was to use decision tree analysis to determine the cost-effectiveness and radiation dose that would result from performing coronary CT angiography (CTA) before catheterization. ⋯ Performing coronary CTA before cardiac catheterization is a cost-effective strategy in the care of patients without symptoms who have positive stress test results when the probability that the patient has significant coronary artery disease is less than 50%. The false-negative rate with this strategy compares favorably with the false-negative rate of stress testing. The use of coronary CTA in this role can avoid many unnecessary cardiac catheterization procedures.
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The purposes of this review are to summarize the causes of recurrent pain after percutaneous vertebroplasty and to discuss the incidence, clinical symptoms, risk factors, image findings, treatment and prognosis, and prevention of such pain. ⋯ Percutaneous vertebroplasty is widely used to treat patients with symptomatic osteoporotic compression fractures. Although the procedure relieves the pain of the compression fracture, recurrent back pain after percutaneous vertebroplasty is common.
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AJR Am J Roentgenol · May 2010
Comparative StudyQuantification of hepatic iron deposition in patients with liver disease: comparison of chemical shift imaging with single-echo T2*-weighted imaging.
The purpose of this study was to determine the diagnostic performance of chemical shift imaging, compared with that of single-echo T2*-weighted imaging, for hepatic iron quantification in patients with liver disease, and to examine the confounding effect of steatosis. ⋯ Routine chemical shift imaging and single-echo T2*-weighted imaging have excellent diagnostic performance for detection of significant hepatic siderosis (grade >or= 2). Concomitant steatosis lowers the diagnostic performance of both sequences without reaching significance.
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AJR Am J Roentgenol · May 2010
Comparative StudyDetection of chest trauma with whole-body low-dose linear slit digital radiography: a multireader study.
The objective of our study was to compare the performance of low-dose linear slit digital radiography (DR) with computed radiography (CR) for the detection of trauma sequelae in the chest including rib fractures, pneumothorax, and lung contusion. ⋯ Linear slit DR is a reliable substitute for CR in the initial evaluation of chest trauma, with better sensitivity for detecting rib fractures and similar performance in assessing pneumothorax and lung contusion.