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Acute Disseminated Encephalomyelitis (ADEM) Secondary to
Acute Disseminated Encephalomyelitis (ADEM) Secondary to

... ADEM usually produces a widespread CNS disturbance, similar to our patient’s presentation, while multiple sclerosis is typically monosymptomatic [3]. Likewise, our patient presented with confusion, which is atypical in the presentation of MS. On neuroimaging, lesions secondary to ADEM typically pres ...
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Most common

... 5% of malignant tumours in children 60% of soft-tissue tumours in children Occurs at any site, any time 66% less than 10 years of age Two peak occurrences: - 2–6 years – Mostly head and neck and ...
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... Consider whether interfaces or prostate center of mass is the desired matching objective Screen patients at sim and do not use for patients that don’ don’t image well Find prostate using lots of probe pressure, then back off until just visible Consider benefits of intraintra-modality (US/US) alignme ...
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TRIGEMINAL NEURLAGIA

... • John Locke : American physician in Paris – gave a full detailed description of TGN. The patient was the Countess of Northumberland, wife of British Ambassador to the French Court. • Nicolas Andre : called the clinical entity ‘Tic douloureaux’ in 1756 describing 5 patients who suffered from a : ‘cr ...
Computed tomography – an increasing source of radiation exposure
Computed tomography – an increasing source of radiation exposure

... Organ doses from CT scanning are considerably larger than those from corresponding conventional radiography (Table 1). For example, a conventional anterior–posterior abdominal x-ray examination results in a dose to the stomach of approximately 0.25 mGy, which is at least 50 times smaller than the co ...
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... Positron Emission Tomography / Computer Tomography (PET/CT) Positron Emission Tomography (PET)(1,2) is a nuclear medicine, functional imaging technique that produces a three-dimensional (3D) image of functional processes in the living body. The system detects pairs of gamma rays emitted indirectly b ...
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Computed tomography--an increasing source of radiation exposure.
Computed tomography--an increasing source of radiation exposure.

... Organ doses from CT scanning are considerably larger than those from corresponding conventional radiography (Table 1). For example, a conventional anterior–posterior abdominal x-ray examination results in a dose to the stomach of approximately 0.25 mGy, which is at least 50 times smaller than the co ...
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Diagnostic Imag5

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File Ref.No.38933/GA - IV - J2/2013/CU UNIVERSITY OF CALICUT

... months followed by clinical training of 12 months in two semesters. A project work is to be submitted during the period. VI. MEDIUM OF INSTRUCTION – English VII. ATTENDANCE – A candidate is required to put in at least 80% attendance in theory and   practical subjects separately in the recognized ins ...
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Radiosurgery

Radiosurgery is surgery using radiation, that is, the destruction of precisely selected areas of tissue using ionizing radiation rather than excision with a blade. Like other forms of radiation therapy, it is usually used to treat cancer. Radiosurgery was originally defined by the Swedish neurosurgeon Lars Leksell as “a single high dose fraction of radiation, stereotactically directed to an intracranial region of interest”. In stereotactic radiosurgery (SRS), the word stereotactic refers to a three-dimensional coordinate system that enables accurate correlation of a virtual target seen in the patient's diagnostic images with the actual target position in the patient anatomy.Technological improvements in medical imaging and computing have led to increased clinical adoption of stereotactic radiosurgery and have broadened its scope in recent years. Notwithstanding these improvements, the localization accuracy and precision that are implicit in the word “stereotactic” remain of utmost importance for radiosurgical interventions today. Stereotactic accuracy and precision are significantly increased by using a device known as the N-localizer that was invented by the American physician and computer scientist Russell Brown and that has achieved widespread clinical use in several stereotactic surgical and radiosurgical systems.Recently, the original concept of radiosurgery has been expanded to include treatments comprising up to five fractions, and stereotactic radiosurgery has been redefined as a distinct neurosurgical discipline that utilizes externally generated ionizing radiation to inactivate or eradicate defined targets in the head or spine without the need for a surgical incision. Irrespective of the similarities between the concepts of stereotactic radiosurgery and fractionated radiotherapy, and although both treatment modalities are reported to have identical outcomes for certain indications, the intent of both approaches is fundamentally different. The aim of stereotactic radiosurgery is to destroy target tissue while preserving adjacent normal tissue, where fractionated radiotherapy relies on a different sensitivity of the target and the surrounding normal tissue to the total accumulated radiation dose. Historically, the field of fractionated radiotherapy evolved from the original concept of stereotactic radiosurgery following discovery of the principles of radiobiology: repair, reassortment, repopulation, and reoxygenation. Today, both treatment techniques are complementary as tumors that may be resistant to fractionated radiotherapy may respond well to radiosurgery and tumors that are too large or too close to critical organs for safe radiosurgery may be suitable candidates for fractionated radiotherapy.
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