Answers to Illuminations questions

Answers (1) False, (2) False, (3) True, (4) False, (5) True, (6) False, (7) True, (8) True. This patient has an acute, non-haemorrhagic right middle cerebral territory infarct. There was involvement of the right precentral and postcentral gyri (motor and sensory areas) on other images. The axial T2-weighted image (figure 1) demonstrates high signal in swollen/oedematous ischaemic cortex with effacement of the sulci. There is also restricted diffusion in the affected area, with corresponding high/increased signal (bright) on DWI (figure 2), and low signal (dark) on the apparent diffusion coefficient (ADC) map (figure 3). In this case, no underlying cause was identified. In particular, there was no evidence of arterial dissection, echocardiography was normal and a thrombophilia screen was negative. DWI produces image contrast that is dependent on the molecular motion (or diffusion characteristics) of water in the tissues. It is particularly useful in cerebral ischaemia and can...

Source: Archives of Disease in Childhood - Education and Practice - May 17, 2016 Category: Pediatrics Authors: Williams, H. Tags: Oncology, Journalology, Echocardiography, Epilepsy and seizures, Headache (including migraine), Infection (neurology), Neurooncology, Stroke, Child health, Radiology, Clinical diagnostic tests, Radiology (diagnostics), Competing interests (ethics) Illum Source Type: research