Michael R. Paling

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Respiratory motion commonly produces degradation of image quality on magnetic resonance scans of the upper abdomen due to artifacts produced in the direction of the phase encoding gradient. Such artifacts may be reduced, although not eliminated, on image sequences obtained with relatively short acquisition times by means of breath holding during the middle(More)
The computed tomographic findings in 11 cases of malignant fibrous histiocytoma are discussed. The typical appearance of the eight primary tumors imaged was of a poorly marginated mass with an attenuation coefficient slightly lower than that of normal muscle. Central tumor necrosis was detected in three cases. Three of five abdominal tumors showed(More)
Spinal lipomas account for less than 1% of all spinal tumors. Prior to the advent of computed tomography, the preoperative diagnosis could only be suggested on the basis of nonspecific clinical and radiographic findings. We report a case of an unusual spinal lipoma that presented as a mediastinal mass. The low attenuation values of the tumor allowed a(More)
While magnetic resonance imaging (MRI) is no longer a tool of the future, its availability is limited. Most hospitals still use high-resolution computed tomography (CT) scanning as their major imaging modality. Although numerous articles point to the improved diagnostic uses of MRI--as compared to high-resolution CT--a change from high-resolution CT(More)
Adrenal masses are described in seven cases of non-Hodgkin lymphoma in a series of 173 patients. In all seven patients the lymphoma was diffuse rather than nodular. Three patients had adrenal masses at the time of presentation, whereas in four cases the adrenal gland was a site of tumor recurrence after therapy. Three patients had simultaneous bilateral(More)
Seven patients who had tumors arising in the anterior face or paranasal sinuses and invasion of the anterior skull base were evaluated with magnetic resonance (MR) and high resolution CT. Magnetic resonance was superior in evaluating tumor encasement of the carotid artery and invasion of the cavernous sinus; for assessing the relationship of the tumor to(More)
Localized changes of radiation necrosis in 6 patients treated for Ewing sarcoma are described. Well-circumscribed lytic areas in the cortex of a previously irradiated long bone may be mistaken for tumor recurrence, especially if they are few in number and surrounded by relatively normal bone. The clarity of demarcation of these lesions, their progression,(More)
Since the introduction of the water-soluble contrast agent metrizamide, reports of side effects in man following myelography have been limited to the frequent occurrence of relatively minor symptoms such as headache and vomiting , and the occasional episode of grand mal convulsions [17]. Such convulsions may relate to an excessive quantity of the contrast(More)