AJR. American journal of roentgenology
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AJR Am J Roentgenol · Mar 2002
Comparative StudyPrediction of postoperative lung function in patients with lung cancer: comparison of quantitative CT with perfusion scintigraphy.
Prediction of postoperative lung function is important in preoperative evaluation of patients with lung cancer. Perfusion scintigraphy is the current method to assess the fractional contribution of lung function of the remaining lung. We developed a quantitative CT method and compared it with perfusion scintigraphy for predictions of postoperative forced expiratory volume in 1 sec (FEV1) in patients with lung cancer. ⋯ Given its simplicity, we proposed that quantitative CT be widely used in predicting postoperative FEV1.
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AJR Am J Roentgenol · Mar 2002
Comparative StudyComparison of permeability in high-grade and low-grade brain tumors using dynamic susceptibility contrast MR imaging.
The purpose of this study was to compare permeability measurements in high-grade and low-grade glial neoplasms using a T2(*)-weighted method. Our hypothesis was that permeability measurements using a T2(*)-weighted technique would show permeability in high-grade neoplasms to be higher than that in low-grade neoplasms. ⋯ Permeability values for high-grade tumors obtained using a T2(*)-weighted method were significantly greater than those for low-grade tumors and are consistent with previous studies reporting results using T1-weighted methods.
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AJR Am J Roentgenol · Mar 2002
Development of a perigraft seroma around modified Blalock-Taussig shunts: imaging evaluation.
The modified Blalock-Taussig shunt is a synthetic shunt between the subclavian and pulmonary artery, frequently used in the treatment of children with pulmonary hypoperfusion caused by congenital heart disease. The development of a perigraft seroma is a known complication of this procedure. We sought to describe the imaging features of a perigraft seroma and to define an optimal diagnostic strategy in patients with a suspected perigraft seroma. ⋯ As was found in these critically ill children, sonography has an advantage over CT and MR imaging because of its portability and, therefore, capability for bedside use. We recommend the use of sonography as the initial imaging modality in suspected cases of perigraft seroma development.