Neuroradiology

Question 1

black signal within the vessel; specific to a superior sagittal sinus thrombosis

Answer 1

delta sign

Question 2

what produces hypointense signal in T1 and T2

Answer 2

Calcifications

Question 3

hyperintense in T1 and T2

Answer 3

Fat

Question 4

used to assess response to rtPA

Answer 4

perfusion scan

Question 5

contrast injection of veins via distal puncture or selective catheterization

Answer 5

conventional venography

Question 6

fluoro-guided procedures

Answer 6

angiography

myelography

Question 7

these lesions indent the thecal sac and spincal cord

Answer 7

extradural lesions

Question 8

these lesions compress spinal cord and fills up thecal sac

Answer 8

intradural

Question 9

these lesions enlarge the spinal cord, but doesn’t impinge on the thecal sac

Answer 9

intramedullary lesions

Question 10

indications for ultrasound

Answer 10

carotid stenosis
vasospasm
infant brain imaging

Question 11

bundles of white matter that cross the midline

Answer 11

forebrain commissures

Question 12

spectrum of congenital structural forebrain anomalies defined by the degree of frontal lobe fusion

Answer 12

holoprosencephaly

Question 13

a dominant monoventricle communicates with a posterior cyst

Answer 13

alobar holoprosencephaly

Question 14

the frontal cortices remain fused but a variable portion of the posterior hemispheres is separated

Answer 14

semilobar holoprosencephaly

Question 15

mild degree of lack of separation of the forebrain

Answer 15

lobar holoprosencephaly

Question 16

most severe malformation of cortical dvpt resulting from the arrest of neuronal migration

Answer 16

lissencephaly

Question 17

characterized by increased number of abnormally small gyri

Answer 17

polymicrogyria

Question 18

most common location of polymicrogyria

Answer 18

perisylvian cortex

Question 19

abnormal gray matter lined cleft extending from the ventricular enedymal surface to the pial cortical surface, giving rise to pial ependymal seam

Answer 19

schizencephaly

Question 20

consists of enlarged posterior fossa, high position of torcula and huge cystic enlargement of the 4th ventricle

Answer 20

dandy-walker complex

Question 21

term used when the 4th ventricle and vermis are normal but the cisterna magna is independently enlarged

Answer 21

megacisterna magna

Question 22

difference btn megacisterna magna and DW complex

Answer 22

falx cerebri is present in megacisterna

Question 23

abnormal low position of the cerebellar tonsils relative to the foramen magnum

Answer 23

CHiari I

Question 24

this malformation on MRI shows that the posterior fossa is small and the cerebellar tonsils and medulla appear to be squeezed out into the upper cervical canal

Answer 24

Chiari II

Question 25

rare condition that might be considered a high cervical myelomeningocele

Answer 25

chiari III

Question 26

further herniation of the cerebellum below the foramen magnum following an encephalocele in addition to spina bifida

Answer 26

chiari III

Question 27

here ditary syndromes grouped together as they primarily affect structures of ectodermal origin

Answer 27

phakomatoses

Question 28

most common phakomatoses

Answer 28

NF I von recklinghausen

Question 29

characteristic lesion of NF II

Answer 29

vestibular or acoustic schwanomma usually bilateral