Journal of computer assisted tomography
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J Comput Assist Tomogr · Sep 2012
Multifocal micronodular pneumocyte hyperplasia: computed tomographic appearance and follow-up in tuberous sclerosis complex.
To characterize pulmonary nodules in patients with tuberous sclerosis complex (TSC) using computed tomography. ⋯ Most men and women with TSC have multiple pulmonary nodules, which likely represent multifocal micronodular pneumocyte hyperplasia in the absence of known predisposing factors.
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J Comput Assist Tomogr · Sep 2012
Dynamic computed tomographic pulmonary angiography as a problem-solving tool in indeterminate computed tomographic angiography for pulmonary embolism.
Computed tomographic pulmonary angiography may be indeterminate in regions of slow arterial flow because of underlying lung disease. In this case, dynamic computed tomographic angiography of the pulmonary vasculature (dynamic CTPA) was used to confirm flow variation within the pulmonary arteries in regions of pulmonary fibrosis and excluded pulmonary embolism. ⋯ Dynamic CTPA successfully demonstrates flow variation within the pulmonary arteries and may be a useful adjunct to exclude pulmonary embolism in CTPA cases with questionable arterial filling defects.
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J Comput Assist Tomogr · May 2012
Comparative StudyComparison of hybrid and pure iterative reconstruction techniques with conventional filtered back projection: dose reduction potential in the abdomen.
Assess the effect of filtered back projection (FBP) and hybrid (adaptive statistical iterative reconstruction [ASIR]) and pure (model-based iterative reconstruction [MBIR]) iterative reconstructions on abdominal computed tomography (CT) acquired with 75% radiation dose reduction. ⋯ Model-based iterative reconstruction renders acceptable image quality and diagnostic confidence in 50- mA s abdominal CT images, whereas FBP and ASIR images are associated with suboptimal image quality at this radiation dose level.
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J Comput Assist Tomogr · May 2012
Case ReportsComputed tomographic imaging features of sudden cardiac arrest and impending cardiogenic shock.
We intend to describe the imaging findings of sudden cardiac arrest occurring during computed tomographic (CT) examination and also of impending cardiogenic shock in 4 patients. Despite rare reports of acute cardiac arrest occurring during or shortly after CT scan, CT features are quite characteristic. Familiarity with CT findings of these patients is essential for accurate interpretation of images, immediate initiation of resuscitation, as well as informing clinical physician in these conditions.
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J Comput Assist Tomogr · May 2012
Radiation dose reduction with Sinogram Affirmed Iterative Reconstruction technique for abdominal computed tomography.
The objective of this study was to assess the effect of Sinogram Affirmed Iterative Reconstruction (SAFIRE) and filtered back-projection (FBP) techniques on abdominal computed tomography (CT) performed with 50% and 75% radiation dose reductions. ⋯ Sinogram Affirmed Iterative Reconstruction-enabled reconstruction provides abdominal CT images without loss in diagnostic value at 50% reduced dose and in some patients also at 75% reduced dose.