Journal of computer assisted tomography
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J Comput Assist Tomogr · Mar 2014
Clear cell meningioma: clinical features, CT, and MR imaging findings in 23 patients.
Clear cell meningioma (CCM) is a rare meningioma, with radiologic features not well characterized in literature. The purpose of this study was to describe and characterize the clinical features and imaging findings of CCM. ⋯ Clear cell meningioma is a rare subtype of meningioma that occurs in younger patients and often recurs. Cerebellopontine angle is the most affected area in this series. The extent of initial surgical resection is the most important prognostic factor. In radiological studies, CCM tends to have marked heterogeneous enhancement, prominent peritumoral edema, intratumoral cystic components, and involvement of the adjacent bone.
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J Comput Assist Tomogr · Mar 2014
Multidetector computed tomographic study of amulets, jewelry, and other foreign objects in royal Egyptian mummies dated from the 18th to 20th dynasties.
The objective of this study was to study the role of multidetector computed tomography (MDCT) in the analysis of foreign objects found within or on the royal Egyptian mummies. ⋯ Multidetector computed tomography offers a detailed noninvasive analysis of objects on/in mummies and differentiates funerary objects from those that may be related to cause of death.
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J Comput Assist Tomogr · Jan 2014
Comparative StudyPreliminary results: prospective clinical study to assess image-based iterative reconstruction for abdominal computed tomography acquired at 2 radiation dose levels.
The objective of this study was to compare image quality for abdominal computed tomographic (CT) images acquired at 200 and 50 mA s and reconstructed with image-based iterative reconstruction. ⋯ Three-dimensional iterative image reconstruction helps to lower image noise without affecting the visibility of small structures at "moderate" settings. Diagnostically acceptable abdominal CT examinations can be acquired at 75% lower-radiation dose with the help of the image-based iterative reconstruction technique.
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J Comput Assist Tomogr · Jan 2014
Inflammatory myofibroblastic tumor: an entity of CT and MR imaging to differentiate from malignant tumors of the sinonasal cavity.
Inflammatory myofibroblastic tumor (IMT) is chronic inflammatory lesions of unknown origins. The preoperative diagnosis for tumors in the sinonasal cavity is difficult to distinguish between IMT and aggressive malignancy in most cases. The purpose of this study was to evaluate the imaging features of IMT distinguishing the 2 types of tumors. ⋯ Inflammatory myofibroblastic tumor and aggressive malignancy have some different imaging features that could be helpful in the differentiation between the lesions. Bone erosion with sclerosis, calcification when present, typically homogenous and never hyperintense of T2 appearance, and mild enhancement played an important role in differentiating sinonasal IMT from malignancies.
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J Comput Assist Tomogr · Sep 2013
Value of perfusion computed tomography in acute ischemic stroke: diagnosis of infarct core and penumbra.
This study aimed to perform an evaluation of 4 perfusion computed tomographic (PCT) parameters (relative cerebral blood flow, cerebral blood volume, mean transit time [MTT], and delay time [DT]) in a series of patients with acute ischemic stroke to find optimal parameters to predict infarct core and penumbra. ⋯ The optimal parameters to define the infarct core and the penumbra are relative DT (≥+ 2.0 seconds) and relative MTT (≥ 150%).