CTH

CTH

Radiology · 345 cards · 164 labeled figures

Explain why the L image is bright, R image dark using the principles of CT imaging & photons
left = acute clotted hyperdense blood (absorbs photons), right = stroke/edema which is made of water which is hypodense (lets photons pass through)[…]
Cursor at bottom - this shows a subgaleal hematoma[…]
The ASPECTS[…] Score used for assessing patients with MCA[…] ischemic stroke for intervention divides the territory into 10[…] segments and 1 point is subtracted for each hypodense segment:
  • Caudate Head[…]
  • Lentiform Nucleus[…]
  • Internal Capsule[…]
  • Insula[…]
  • M1[…], M2[…], M3[…], M4[…], M5[…], M6[…] segments of cortex
What is the ASPECTS Score?
10[…]

normal CTH
What is the ASPECTS Score?
7[…]
Where is the central sulcus and how do you know?

makes "Omega" sign[…]
To find midline for determining MLS, draw a line from the
  • falx cerebri[…] > 
  • thru the septum pellucidum[…] in the middle of the lateral ventricles[…] > 
  • to the confluence of venous sinuses[…]
  • this image shows a R SDH[…] w/MLS to L

CTH Anatomy
  • red: frontal horn, lateral ventricles[…]
  • yellow: occipital horn, lateral ventricles[…]
  • light green: head of caudate[…]
  • dark pink: anterior limb/genu/posterior limb IC[…]
  • dark blue: Gpe/i[…]
  • light blue: putamen[…]
  • dark red: external capsule[…]
  • white: insula[…]

CTH Anatomy
  • these are the occipital horns, lateral ventricles[…] surrounded by the tail[…] of caudate nucleus

CTH Anatomy
  • the body[…] of caudate nucleus runs lateral to these lateral ventricles[structures?]

CTH Anatomy
  • this is occipital horn, lateral ventricle[…]

CTH Anatomy
  • caudate nucleus
    • arterial supply: A1[…] or A2[…] segment of ACA[…]

Intraaxial vs Extraaxial
  • Intraaxial[…]: within the brain parenchyma
  • Extraaxial: outside the brain parenchyma[…]
    • Most common extraaxial hemorrhage is subarachnoid[…] hemorrhage, followed by subdural[…] and epidural[…] hematomas
1 foramen magnum[…]
2 medulla oblongata[…]


3 vertebral artery[…]
4 cerebellar tonsil[…]


5 premedullary cistern[…]
6 internal jugular vein[…]


7 basilar artery[…]
8 sigmoid sinus[…]


9 petrous ICA[…] in the carotid canal[…]
10 cerebellar hemisphere[…]


11 external auditory canal[…]
12 foramen of Magendie[…]


13 superior orbital fissure[…]
14 Meckel's cave[…]
15 foramen of Luschka[…]


16 crista galli[…]
17 pituitary fossa[…]
18 pons[…]


19 gyrus rectus[…]
20 cavernous ICA[…] in the cavernous sinus[…]


21 left temporal pole[…]
22 prepontine cistern[…]
23 middle cerebellar[…] peduncle


24 uncus[…]
25 temporal horn[…] of the lateral ventricle[…]
26 4th ventricle[…]
27 nodule of the cerebellum[…]


28 MCA M1[…] segment
29 suprasellar[…] cistern
30 tentorium cerebelli[…]


31 interpeduncular[…] cistern
32 cerebral peduncle[…]


33 Sylvian fissure[…]
34 mammillary bodies[…]


35 median interhemispheric fissure[…]
36 midbrain[…]


37 ambient cistern[…]
38 cerebral aqueduct (of Sylvius)[…]

39 third ventricle[…]
40 inferior colliculus[…]
41 confluence of the sinuses[…]


41 anterior limb of the internal capsule[…]
42 interventricular foramen (of Monroe)[…]
43 insular cortex[…]
44 transverse sinus[…]


46 genu of the corpus callosum[…]
47 frontal horn of the lateral ventricle[…]
48 genu of the internal capsule[…]
49 quadrigeminal[…] cistern


50 head of the caudate nucleus[…]
51 lentiform nucleus[…]
52 pineal gland[…]
53 superior vermis of the cerebellum[…]


54 column of the fornix[…]
55 posterior limb of the internal capsule[…]
56 internal cerebral vein[…]
57 straight sinus[…]


58 cingulate gyrus[…]
59 septum pellucidum[…]
60 thalamus[…]


61 forceps minor[…]
62 trigone (atrium) of the lateral ventricle[…]
63 occipital lobe[…]


64 splenium of the corpus callosum[…]
65 occipital horn of the lateral ventricle[…]


66 body of the lateral ventricle[…]
67 choroid plexus[…]


68 forceps major[…]
69 inferior sagittal sinus[…]


70 body of the corpus callosum[…]


71 centrum semiovale[…]

72 central sulcus (of Rolando)[…]
73 hand bump of the pre central gyrus (primary motor cortex)[…]


74 marginal sulcus[…]
75 superior sagittal sinus[…]


76 falx cerebri[…]