Question 341
What is the main abnormality demonstrated on this coronal MRI image?
Question 342
What is the main abnormality demonstrated on this axial non-contrast CT image?
Question 343
When visually assessing CT perfusion maps (without the aid of automated software) ischemic infarct core is best delineated by which of the following parameters?
Question 344
In cerebral ischemia, the ischemic penumbra is best defined by which of the following combination of parameters?
Question 345
Which of the following changes in CT perfusion parameters is NOT consistent with an ischemic penumbra?
Question 346
In the accompanying T1 weighted image from a contrast enhanced MRI, the superior sagittal sinus is indicated by which letter?
Question 347
In the accompanying T1 weighted image from a contrast enhanced MRI, the internal cerebral veins are indicated by which letter?
Question 348
In the accompanying T1 weighted image from a contrast enhanced MRI, the vein of Galen is indicated by which letter?
Question 349
In the accompanying T1 weighted image from a contrast enhanced MRI, the torcula herophili is indicated by which letter?
Question 350
In the accompanying T1 weighted image from a contrast enhanced MRI, the straight sinus is indicated by which letter?
Question 364
What is the most likely cause of the bilateral calcific lesions, seen in this coronal image through the posterior sacrum?
Question 390
In the accompanying axial image from a non-contrast CT of the brain, the superior sagittal sinus is indicated by which letter?
Question 391
In the accompanying axial image from a non-contrast CT of the brain, the falx is indicated by which letter?
Question 392
In the accompanying axial image from a non-contrast CT of the brain, the straight sinus/vein of Galen is indicated by which letter?
Question 393
In the accompanying axial image from a non-contrast CT of the brain, the choroid plexus is indicated by which letter?
Question 394
In the accompanying axial image from a non-contrast CT of the brain, the septum pellucidum is indicated by which letter?
Question 395
In the accompanying axial image from a non-contrast CT of the brain, the corpus callosum is indicated by which letter?
Question 396
In the accompanying axial image from a non-contrast CT of the brain, the genu of the corpus callosum is indicated by which letter?
Question 397
In the accompanying axial image from a non-contrast CT of the brain, the head of caudate is indicated by which letter?
Question 398
In the accompanying axial image from a non-contrast CT of the brain, the putamen is indicated by which letter?