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PURPOSE To develop and test a novel method for coil placement in interleaved transcranial magnetic stimulation (TMS)/functional MRI (fMRI) studies. MATERIALS AND METHODS Initially, a desired TMS coil position at the subject's head is recorded using a neuronavigation system. Subsequently, a custom-made holding device is used for coil placement inside the(More)
BACKGROUND Field calculations for transcranial magnetic stimulation (TMS) are increasingly implemented online in neuronavigation systems and in more realistic offline approaches based on finite-element methods. They are often based on simplified and/or non-validated models of the magnetic vector potential of the TMS coils. OBJECTIVE To develop an approach(More)
An acrylic head phantom was irradiated during a computed tomographic scan with four commercial scanners. Measurements of the spatial distribution of the radiation dose on the surface and internal to the phantom were performed for the scan plane and the scattered beam at various distances from the scan plane. The surface scatter dose was found to be(More)
reactive arene oxides (10, i i , 21). Jerina and Daly (12) and Jerina et al. (13) have proposed a theory which predicts that ‘‘bay-region' ‘diol-epoxides of PAH are important in their car cinogenic activity. A bay region occurs in PAH when an angu larly fused benzo ring is present (Chart 1). There is now direct evidence from tumorigenicity studies(More)
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