AJR. American journal of roentgenology
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AJR Am J Roentgenol · Jan 2008
Comparative StudyComparison of three free-breathing T2-weighted MRI sequences in the evaluation of focal liver lesions.
The purpose of this study was to compare three free-breathing T2-weighted MRI sequences in the evaluation of focal liver lesions. ⋯ The navigator-triggered PACE technique is a valid method for T2-weighted MRI of the liver and may replace conventional respiration-triggered techniques.
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AJR Am J Roentgenol · Jan 2008
Pediatric chest MDCT using tube current modulation: effect on radiation dose with breast shielding.
The purpose of our study was to assess the effect on radiation dose and image noise during pediatric chest 16-MDCT using automatic tube current modulation and bismuth breast shields. ⋯ The greatest dose reduction is achieved by placing the shield after obtaining the scout image to avoid Auto mA compensation due to density of shield. With this technique, image noise increased but remained close to the target noise index.
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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
Clinical TrialRelationship between cement distribution pattern and new compression fracture after percutaneous vertebroplasty.
The objective of this study was to prospectively investigate relationships between cement distribution patterns and the occurrence rates of new compression fractures after percutaneous vertebroplasty. ⋯ Although cement distribution patterns do not significantly affect initial clinical response, a higher incidence of new compression fractures is seen in patients with treated vertebrae exhibiting a cleft pattern.
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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.