By Anca-Ligia Grosu, Carsten Nieder

The major aim of this ebook is to supply radiation oncologists with a transparent, updated advisor to tumor delineation and contouring of organs in danger. With this in brain, an in depth assessment of modern advances in imaging for radiation remedy making plans is gifted. Novel ideas for goal quantity delineation are defined, taking into consideration the recommendations in imaging know-how. particular cognizance is paid to the function of the more moderen imaging modalities, akin to positron emission tomography and diffusion and perfusion magnetic resonance imaging. all the most vital tumor entities handled with radiation remedy are coated within the booklet. every one bankruptcy is dedicated to a specific tumor variety and has been written via a famous specialist in that topic.

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6. 4 Pituitary Adenoma These adenomas are common benign tumours that arise from gland cells of the anterior pituitary lobe. T. Astner et al. 32 Fig. 6 MRI and CT of a patient treated for vestibularis schwannoma by radiosurgery. PTV in pink. 6). Further subtypes are determined according to their ultrastructural differences in electron microscopy. Imaging and target volume definition are different for pituitary micro- or macroadenoma. For radiosurgery of microadenoma adequate imaging is of high priority.

Mandibularis (cranial nerve V3). 5 Canalis caroticus, internal carotid artery. 6 Meatus acusticus externus. 7 Meatus acusticus internus, N. facialis and N. vestibulocochlearis (cranial nerves VII and VIII). 8 Foramen rotundum, N. 2 Tumours of the orbit and their exact anatomical localisation Anatomical structure Extraconal space Surrounding bony structures, periost Fat/conjunctive tissue Localisation Pathology Bony orbital borders Tear system Lacrimal gland Primary bone or chondroid neoplasias, metastasis, infiltration of sinonasal tumours Lymphoma, lipoma, lymphangioma, capillary haemangioma, dermoid/epidermoid, rhabdomyosarcoma Lymphoma, epithelial tumours, sarcoidosis, pseudotumour Intraconal space Muscle tissue, mesenchymal tissue Extraocular muscles Fat/conjunctive tissue Intraconal fat Optic nerve Neural tissue, glial cells Entire route of optic nerve Dura Ocular bulb Retina Choroidea, ciliary body Extraconal tissue Optic sheath Retina, posterior lining of the bulb Choroidea, ciliary body will be described for each tumour entity.

A complete description of these definitions can be found in the ICRU 50 report (ICRU 1993). In addition, the approaches described with respect to dose selection and volume contouring are those currently in practice at the University of Toronto and subject to change. At this time there is a lack of data and consensus as to optimal margins, and the reader should be aware of the limitations in the literature. Case-Based Discussion of Common Spinal Cord Tumors IMST of all three glial lines can occur in the spinal cord.

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