objectives this study examined 125i concentrations in the edible parts of five types of plants from different locations on farms with a similar climate. near zahedan, iran. background radioiodine 125i is an environmental contaminant that humans may consume in edible plants. the characteristics of 125i in plants are poorly understood. materials and methods the experiments used a mini-column appr...

Fourteen cases of totally or predominantly unilateral ventricular reflux and stasis of intrathecally injected radioisotope or contrast medium were demonstrated by scintigraphy or computed tomographic cisternography. All showed asymmetric enlargement of the lateral ventricles and nine had ipsilateral brain lesions. Four case reports are presented. The pathophysiologic mechanism of communicating ...

We have developed conventional and transparent 3D MR cisternography to investigate the spatial relationship between the contours of aneurysmal complex and the perianeurysmal structures including the cranial nerves, dural fold, cranial base bone, and brain parenchyma. Volume data obtained by a T2-weighted 3D fast spin-echo sequence were reconstructed by using a perspective volume-rendering algor...

Dolichoectasia of the distal internal carotid arteries and the proximal anterior cerebral arteries is a well recognized abnormality. The angiographic and computed tomographic (CT) findings have been described [1-8]. Arterial enlargement has been implicated in chiasmal and optic nerve syndromes [1, 3-9]. We report a symptomatic patient with chiasmal deformity and associated arterial dolichoectas...

A technique for analysis of dynamic radionuclide studies of the cerebral circulation is described. This technique permits objective classification of observed radionuclide distribution patterns. Variation in the time-to-peak activity, and in the maximum attained activity as determined by region-of-interest analysis of cerebral hemispheric activity, was defined for a normal population. Applicati...

Radionuclide dating is a robust technique for establishing the recent accumulation rate for most peatlands. In this article we review the production of ‘fall-out’ radionuclides and the concepts underlying the dating method. Some inherent problems such as the issues surrounding reduced natural radionuclide deposition, e.g. ‘continentality’, are highlighted. We describe the common radionuclide an...

BACKGROUND AND PURPOSE We evaluated the use of MR cisternography after intrathecal administration of gadopentetate dimeglumine to detect the presence and localization of CSF leaks in 19 patients diagnosed with spontaneous intracranial hypotension syndrome according to the criteria of International Headache Society. MATERIALS AND METHODS Lumbar puncture with an injection of 0.5 mL of gadopente...

Recently, percutaneous thermocoagulation [1-3] or retrogasserian glycerol rhizotomy [4, 5] has been used in the treatment of tic douloureux. In a few unsuccessful cases, lesions such as multiple sclerosis, tumors of the cerebellopontine angle, arteriovenous malformation (AVM), or aneurysm of the vertebrobasilar artery system have been reported as the causative factors [5] . Among these, AVM is ...

PURPOSE The accurate diagnosis of deep vein thrombosis (DVT) is essential to prevent its complications and to initiate appropriate treatment. Doppler ultrasound (DUS), contrast venography, and intravenous radionuclide venography have been used for many years to detect DVT. However, obtaining venous access in the foot for injection of contrast agent can be difficult. METHODS The authors introd...