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  Bilateral subdural hematomas especially when they are isodense may be missed on CT. A classical sign is "Rabbit Ear Sign" in which frontal horns point posteriorly.
Dr.Sumer K Sethi, MD
Sr Consultant Radiologist ,VIMHANS and CEO-Teleradiology Providers
Editor-in-chief, The Internet Journal of Radiology
Director, DAMS (Delhi Academy of Medical Sciences) |
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I read this in the Times of India and though it sounds kind of comic but somewhere makes some sense.
"Imagine sitting in a dark room all day, evaluating CT scans and other medical images on a computer screen but never actually seeing real patients. That’s life for many radiologists. But an intriguing Israeli study found adding photos of patients’ faces to the file made these doctors more meticulous when looking at the X-rays. They reported more details and said they felt more empathy for patients who were otherwise strangers. Adding patients’ photos is a simple, low-tech way to reap rewards for both doctors and their patients, the researchers concluded."
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According a Thai study by Kanitpong Phabphal et al in J Telemed Telecare 2008;14:439-442, They have developed a low-cost system using a PDA phone as the receiving equipment. The experimental system was based on a notebook PC to send the images and a PDA phone to receive them. A total of 100 images from clinically suspected strokes within the previous 24 hours were transmitted to a neurologist. The mean transmission time was 48 s per image. The diagnosis from the PDA phone image was in complete agreement with the diagnosis from the original image in cases of acute ischaemic stroke, intracerebral haemorrhage, metastasis and in normal scans. However, there was agreement in only 7 of the 8 cases (88%) of subarachnoid haemorrhage. The study showed that good accuracy can be achieved with a low-cost system for teleradiology consultation in stroke.
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The Alliance for Radiation Safety in Pediatric Imaging – the Image Gently Alliance -is a coalition of health care organizations dedicated to providing safe, high quality pediatric imaging nationwide. The primary objective of the Alliance is to raise awareness in the imaging community of the need to adjust radiation dose when imaging children. The ultimate goal of the Alliance is to change practice.
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   Spinal arachnoid cysts are relatively uncommon lesions that may be intradural or extradural with the intradural variety being rare . The majority of intradural spinal arachnoid cysts occur in the thoracic region with only 15% in the cervical region and 5% in the lumbar region . Most are dorsal to the spinal cord (80%). Secondary intradural spinal arachnoid cyst formation is uncommon and is known to occur due to various causes such as trauma, surgery, lumbar puncture, intrathecal injections, arachnoiditis and inflammation.
MRI is useful to assess the size, nature and extent of the cystic lesion as well as the mass effect on the cord and associated signs of meningeal inflammation. Increased CSF signal intensity on T1 weighted images leading to loss of CSF–cord interface is strongly suggestive of the arachnoiditis
Differential diagnosis on imaging includes other intradural cystic lesions like dermoids, epidermoids, hydatidosis and cysticercosis. In a rare case reported by Ciftci et al, multiple intradural cysticercosis were found in the basal cistern, cisterna magna, and cervical subarachnoid space which were isointense with cerebrospinal fluid both on T2 and T1 weighted images Dermoid can be diagnosed by presence of fat and midline in location, epidermoid are bright on spinal difusion where available. Hydatids are better diagnosed by exclusion. Inflammatory etiology with TB can be suggested by sepate, flow signal aberrations and leptomeningeal enhancement apart from brain findings. |
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 AIIMS November 2008 fully solved and explained with references by famous DAMS faculty, is now available. Book is by peepee publishers. Details here. http://www.damsdelhi.com DAMS as every year has had many selections in AIIMS, with around 40 selections this year.
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RadDaily.com is a radiology resource for medical students, technologists, radiology residents and radiologists. The purpose of the website is to provide users with a daily image with a brief desription. The purpose of this site is to provide a single representative image of a disease process and a quick summary of the disease process. The perfect daily refresher to use while waiting for the next case to come or next series to load up in PACS during your busy workday.
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  This is a rare congenital lesion characterized by the presence of fatty deposits in inappropriate places in the central nervous system The embryological derangement that leads to the formation of lipomas is still debated; lipomas are variously considered to be the result of mesodermal inclusion due to dysraphism, hyperplasia of normal leptomeningeal fat cells, heterotopia of displaced dermal anlage or derivatives from the embryological meninx primitiva(most accepted theory). Common locations are pericallosal, quadrigeminal cistern, hypothalamic suprasellar and cerebellopontine regions usually asymptomatic but can present with seizures, headache and behavioural disturbances. can be associated with callosal abnormalities. Pericallosal lipoma is usually located within the interhemispheric fissure along the corpus callosum , and on the basis of MR imaging findings in adults and children, these lesions are classified as one of two types . The tubulonodular form is round, more than 2 cm in size, and is usually located at the genu area of the corpus callosum. The second form, on the other hand, is curvilinear; thin and elongated, it is less than 1 cm in diameter and is usually found more posterior to the corpus callosum. The former has ben more associated with callosal anomalies association with pericallosal lipomas include midline defects (cleft lip or palate, median cleft nose, hypertelorism, cerebellar vermis defects, frontal lipomas) and dysraphism (myelomeningocele, encephalocele, anomalies of the cervical spine, cranium bifidium, or other calvarial defects). |
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This is a rare congenital lesion characterized by the presence of fatty deposits in inappropriate places in the central nervous system The embryological derangement that leads to the formation of lipomas is still debated; lipomas are variously considered to be the result of mesodermal inclusion due to dysraphism, hyperplasia of normal leptomeningeal fat cells, heterotopia of displaced dermal anlage or derivatives from the embryological meninx primitiva(most accepted theory). Common locations are pericallosal, quadrigeminal cistern, hypothalamic suprasellar and cerebellopontine regions usually asymptomatic but can present with seizures, headache and behavioural disturbances. can be associated with callosal abnormalities. Pericallosal lipoma is usually located within the interhemispheric fissure along the corpus callosum , and on the basis of MR imaging findings in adults and children, these lesions are classified as one of two types . The tubulonodular form is round, more than 2 cm in size, and is usually located at the genu area of the corpus callosum. The second form, on the other hand, is curvilinear; thin and elongated, it is less than 1 cm in diameter and is usually found more posterior to the corpus callosum. The former has ben more associated with callosal anomalies association with pericallosal lipomas include midline defects (cleft lip or palate, median cleft nose, hypertelorism, cerebellar vermis defects, frontal lipomas) and dysraphism (myelomeningocele, encephalocele, anomalies of the cervical spine, cranium bifidium, or other calvarial defects).
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