By D. Tack, Pierre Alain Gevenois, A.L. Baert
Because of the radiation dose added, multidetector row CT (MDCT) may possibly set off cancers, and the chance of loss of life has been expected at as much as one in step with 1,000 examinations. regardless of this, just a small share of referring clinicians, radiologists, and technologists are conscious of either the radiation dangers and their underlying mechanisms. This publication is designed to rectify this case. the 1st a part of the ebook offers a finished method of all of the elements that impact the radiation dose and hence the danger brought on through the use of MDCT in little ones and grownup sufferers. within the moment half, guidance are proposed for optimization of the radiation dose that allows you to receive a picture caliber enough for acceptable diagnostic functionality whereas proscribing the dose added. This publication, written by means of specialists of foreign status, will entice either common and really good radiologists, together with pediatric radiologists, CT technologists, physicists, brands, and all pros fascinated about MDCT.
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Extra resources for RAD CLIN NA. NEURORADIOLOGY ESSENTIALS
The remainder of this review will discuss strategies for successful interpretation of MR images from the seizure patient and how to avoid potential pitfalls. Overview of epilepsy Epilepsy is a chronic, neurologic disorder characterized by spontaneous, recurrent seizures. Seizures are caused by excessive and abnormal electrical discharges from the cortical neurons. The epilepsies and epilepsy syndromes are broadly classified into generalized and focal . Partial (focal) seizures originate from a localized area of the brain, whereas generalized seizures originate simultaneously from both cerebral hemispheres.
Yousem DM, Som PM, Hackney DB, et al. Central nodal necrosis and extracapsular neoplastic spread in cervical lymph nodes: MR imaging versus CT. Radiology 1992;182:753–9. King AD, Tse GM, Ahuja AT, et al. Necrosis in metastatic neck nodes: diagnostic accuracy of CT, MR imaging, and US. Radiology 2004;230: 720–6. Don DM, Anzai Y, Lufkin RB, et al. Evaluation of cervical lymph node metastases in squamous cell carcinoma of the head and neck. Laryngoscope 1995;105(7 Pt 1):669–74. Friedman M, Roberts N, Kirshenbaum GL, et al.
13]. The one exception is lymphoma, which may only have hilar flow. The use of flow patterns, such as peripheral vascularity with or without central vascularity, improves the overall accuracy of sonography to 92% in identifying metastatic nodes . US-guided fine-needle aspiration can be performed to obtain cells for cytologic evaluation and confirmation of suspected metastatic disease and to obtain samples for microbiologic evaluation. US-guided fine-needle aspiration cytology has an accuracy of 95% to 97% to provide the appropriate diagnosis and is commonly used to evaluate cervical adenopathy [20,21].