By Luigi Bolondi
Neurorehabilitation including useful neurosurgery are gradually becoming fields, with new advances and applied sciences together with: selective interruption of assorted neural circuits, stimulation of the cerebral cortex, deep mind buildings, spinal wire and peripheral nerves with implantable stimulation structures, and mobilephone transplantation in addition to nerve grafting. contemporary advances in neuroimaging recommendations have additionally started to illustrate the involvement of intensive sensible and structural reorganization of neural networks in the mind. with a view to encapsulate such innovations, the fourth authentic medical assembly of the Neurorehabilitation and Reconstructive Neurosurgery Committee of the realm Federation of Neurosurgical Societies (WFNS) used to be held in Seoul. This quantity is the fourth in a brand new sequence of court cases overlaying crucial developments during this box.
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Extra info for Advances in Diagnostic Imaging The Value of Contrast-Enhanced Ultrasound for Liver
Radiology 215(1):153-161 11. Sahani DV, Kalva SP, Tanabe KK et al (2004) Intraoperative US in patients undergoing surgery for liver neoplasms: comparison with MR imaging. Radiology 232(3):810-814 12. Durand F, Regimbeau JM, Belghiti J et al (2001) Assessment of the benefits and risks of percutaneous biopsy before surgical resection of hepatocellular carcinoma. J Hepatol 35(2):254-258 13. Herszenyi L, Farinati F, Cecchetto A et al (1995) Fine-needle biopsy in focal liver lesions: the usefulness of a screening programme and the role of cytology and microhistology.
It is therefore not surprising, that the tumor network of liver metastases cannot be visualized by color Doppler techniques. Even contrast-enhanced CT or CEUS often does not demonstrate the total viable tumor tissue. Normal liver tissue can be discriminated from abnormal tissue by imaging the differences in tumor blood supply: the nutrition of microscopic liver metastases occurs by diffusion or portal-venous supply. With ongoing tumor, the growing arterial supply dominates perfusion of the tumor .
FNH has no capsule, and most present as iso- to slightly hyperechoic tumors. Color Doppler findings may show a typical “spoke and wheel” sign of the supplying arteries. 58 [31, 32]. Large FHN may have more than one feeding artery that may also be located in the tumor periphery. Typically, FNH enhance very early (8-11 s, Figs. 12, 14, 15), and feeding and draining vessels can be seen. During the PV and late phases, they become iso/hyperenhancing. A central scar is not a specific sign, but can be found in up to 30% of patients (Table 6, Fig.