AJR. American journal of roentgenology
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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
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.
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AJR Am J Roentgenol · Dec 2007
Randomized Controlled Trial Multicenter StudyCT and PET: early prognostic indicators of response to imatinib mesylate in patients with gastrointestinal stromal tumor.
We report results from a pilot study aimed at optimizing the use of CT bidimensional measurements and 18F-FDG PET maximum standardized uptake values (SUVs-(max)) for determining response to prolonged imatinib mesylate treatment in patients with advanced gastrointestinal stromal tumors (GISTs). ⋯ The two best metrics were the optimized PET SUVmax threshold of 3.4 at 1 month (p = 0.00002) and the optimized CT bidimensional measurement threshold (no growth from baseline to 1 month, p = 0.00005) in this patient group.
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AJR Am J Roentgenol · Dec 2007
ReviewPostoperative imaging in cyanotic congenital heart diseases: part 2, Complications.
The purpose of this article is to illustrate the MRI appearance of postoperative complications in the surgical procedures most commonly performed to correct cyanotic congenital heart disease. ⋯ The radiologist must be familiar with the morphologic and functional MRI appearances of surgical complications in patients with palliated or repaired cyanotic congenital heart disease to deliver an accurate diagnosis on which to base management decisions.
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AJR Am J Roentgenol · Dec 2007
ReviewPostoperative imaging in cyanotic congenital heart diseases: part 1, Normal findings.
The objective of this article is to illustrate the most common surgical procedures performed in patients with cyanotic congenital heart diseases along with the respective postoperative MRI findings normally seen in clinical practice. ⋯ Radiologists need a solid knowledge of the surgical procedures used to treat patients with cyanotic congenital heart diseases to identify what constitutes normal postoperative findings on MR images and to play an ongoing role in the integral lifelong care of these patients.