Acta radiologica
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Differentiation between the viable and necrotic parts of a tumor is essential for accurate biopsy results and for treatment planning. ⋯ Creation of an ADC map is an excellent method for differentiation between the viable and necrotic parts of head and neck tumors. Thus, the ADC map can be used to select the best biopsy site and to detect tumor viability in post-treatment follow-up of patients after radiation therapy.
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Comparative Study
Magnetic resonance imaging of the cranial nerves in the posterior fossa: a comparative study of t2-weighted spin-echo sequences at 1.5 and 3.0 tesla.
High-field magnetic resonance imaging (MRI) at 3.0 Tesla (T) is rapidly gaining clinical acceptance. Whether doubling of the field strength of 1.5T and the subsequent increase in signal-to-noise ratio (SNR) leads to a significant improvement of image quality is not automatically given. ⋯ The comparison revealed a clear advantage in favor of T2-weighted MRI at 3.0T vs. 1.5T in depicting the roots and course of brain nerves in the posterior fossa.
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Unipedicular vertebroplasty can be successful in selected patients to decrease procedure time, sedation amounts, and cost. ⋯ The unipedicular vertebrogram was helpful in predicting adequate cement deposition, using a single pedicle, in 51 of 75 cases (68%). The vertebrogram was also accurate in predicting the need for a double-pedicle technique in an additional 21 cases (28%). Therefore, the vertebrogram was very helpful in predicting the route of cement deposition in 72 of 75 (96%) cases, and should be considered as an adjunct to percutaneous vertebroplasty.
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The effect of radiofrequency ablation (RFA) can be modulated by fluid injection. ⋯ Besides the modulation of the electrical conductivity, the increase in thermal conductivity also contributes to the enhancement of RFA by the injection of the tested fluids. Further studies are needed to evaluate this effect for larger injection volumes under in-vivo conditions.