How to report a CT – brain study
<Item to be fulfilled:
- Ventricular system
- Mid line structures
- Cerebral parenchyma
- Posterior fossa structures
- Cortical sulci and extra axial CSF spaces
- Para nasal sinuses
Normal brain without contrast
Normal size and configuration of the ventricular system.
No mid line shift.
No intra cerebral or extra axial areas of abnormal attenuation values.
Normal posterior fossa.
OR Normal appearance of the brain stem and cerebellum.
OR No evidence of posterior fossa abnormalities.
n Scanned para nasal sinuses are clear.
Normal brain with contrast
Normal size and configuration of the ventricular system.
No mid line shift.
No intra cerebral or extra axial areas of abnormal attenuation values or
enhancing lesions.
Normal posterior fossa.
OR Normal appearance of the brain stem and cerebellum.
OR No evidence of posterior fossa abnormalities.
n Scanned paranasal sinuses are clear.
Normal Brain [Trauma]
Normal size and configuration of the ventricular system.
No mid line shift.
No intra cerebral or extra axial recent blood density.
Normal posterior fossa.
OR Normal appearance of the brain stem and cerebellum.
OR No evidence of posterior fossa abnormalities.
n Scanned paranasal sinuses are clear.
o No fracture lines seen.
NB If fractures are present mention the site (frontal, parietal, …) and type
(fissure, depressed, comminuted,….). when subgalial hematoma is
present it should be mentioned.
Normal Brain (Sinusitis)
Normal size and configuration of the ventricular system.
No mid line shift.
No intra cerebral or extra axial areas of abnormal attenuation values.
Normal posterior fossa.
OR Normal appearance of the brain stem and cerebellum.
OR No evidence of posterior fossa abnormalities.
n Partial or total opacification of …….sinuses by mucosal thickening
denoting sinusitis [mention the affected sinuses, maxillary, ethmoidal,…]
Normal Brain old age
Symmetrical dilatation of the ventricular system with prominence of the
extra axial CSF spaces.
No mid line shift.
No intra cerebral or extra axial areas of abnormal attenuation values.
Normal posterior fossa.
OR Normal appearance of the brain stem and cerebellum.
OR No evidence of posterior fossa abnormalities.
n Scanned Para nasal sinuses are clear.
Abnormal Brain
To describe a lesion you should mention the following points:
- Definition [well defined, ill- defined]
- Shape [oval, rounded, irregular…]
- Size [-----x------x------ cm in maximal AP, transverse and cranio caudal diameters respectively]
- Site [intra axial, extra axial, frontal,parietal, …..]
- Surrounding edema [If present]
- Mass effect which includes
- effacement of the cortical sulci
- Compression of the ventricle
- Midline shift
< Intra cerebral hemorrhage
A well defined, oval shaped area of recent blood density is seen in the ------
[mention the site, right or left, which part of the brain]
The lesion measures ----x ----x --- cm maximal AP, transverse and
craniocaudal diameters respectively.
The lesion exerts a mass effect in the form of effacement of the cortical
sulci ± compression of the ipsilateral ventricle ± contra lateral shift of the
midline structures.
Normal posterior fossa (if the lesion is not in the posterior fossa).
nScanned paranasal sinuses are clear.
< Extraaxial hemorrhage
A well defined extra axial (elipitical or cresentric shaped) area of recent
blood density is seen in the -------[mention the site]
The lesion measures ----x ----x ----cm maximal AP, transverse and
craniocaudal diameters respectively.
The lesion exerts a mass effect in the form of effacement of the cortical
sulci ± compression of the ipsilateral ventricle ± contra lateral shift of the
midline structures.
Normal posterior fossa (if the lesion is not in the posterior fossa).
nScanned paranasal sinuses are clear.
< Sub arachnoids hemorrhage
Fresh blood density is seen smearing the cortical sulci and extra axial CSF
spaces ± extension into the ventricular system also mention that the
ventricular system is dilated denoting the presence of communicating
hydrocephalus which is usually seen in cases of subarachnoid
hemorrhage.
not included
Normal posterior fossa (if the lesion is not in the posterior fossa).
nScanned paranasal sinuses are clear.
Brain infarction
A well defined hypodense area is seen in -------[mention the site].
Not included [we do not usually measure the size of the infarct]
The lesion exerts a mass effect in the form of effacement of the cortical
sulci ± compression of the ipsilateral ventricle ± contra lateral shift of the
midline structures.
OR The lesion is associated with evacu dilatation of the adjacent
ventricle and cortical sulci [in case of chronic infarction]
<Space occupying lesion
Astrocytoma / Glioma
A well defined [or an ill – defined], ------[mention the shape of the lesion
oval, irregular,…] shaped SOL is seen in the -----[mention the site of the
lesion]
If the lesion is not enhanced then write [Showing no evidence
of post contrast enhancement]
OR Showing heterogenous (or marginal) enhancement with central
areas of necrosis and breakdown.
OR The lesion is mainly cystic with an enhancing mural nodule measuring….cm in maximal transverse diameters [mention the measurement of the nodule]
The lesion is surrounded by grade --- perifocal brain edema hypodensity.
The lesion and edema exert a mass effect in the form of -------, --------, ---
Normal posterior fossa (if the lesion is not in the posterior fossa).
n Scanned Para nasal sinuses are clear
OR Scanned Para nasal sinuses showed mucosal thickening in the ----,------ (mention the name of the affected sinuses ) denoting sinusitis.
<Space occupying lesion
Metastatic deposits
Multiple well defined SOLs are seen in --------[mention the site of the
lesions] [cerebral hemisphere, both hemisphere, cerebellum, brain stem,
infratentonial, supratentorial, both……].
The lesions range in size between -------[the smallest lesion] and -------[the
largest lesion] and showed---------[mention the pattern of enhancement.
The largest lesion measures ----- x ----- cm in maximal diameters and is
located in ---- [mention the site of the largest lesion].
The lesion is surrounded by grade --- perifocal brain edema hypodensity.
The lesion and edema exert a mass effect in the form of -------, --------, -----
Normal posterior fossa [if no lesions in the posterior fossa].
n Scanned Para nasal sinuses are clear
OR Scanned Para nasal sinuses showed mucosal thickening in the --,------ (mention the name of the affected sinuses ) denoting sinusitis.
NB A solitary metastatic deposit (a patient known to have primary
malignancy is described in the same way as glioma).
Cyst
A well defined cystic hypodense SOL is seen in the ------(mention the site of
the lesion).
Ex. Arachnoid cyst is usually present in the inferior temporal region
against the greater wing of the sphenoid bone.
Ex. Epidermoid cyst is usually located in the cerebellopontine angle.
Ex. Dermoid cyst is usually located in the midline and contains fat.
As above (note that most of the cysts do not enhance, then write showing
no evidence of post contrast enhancement)
Also note thet some cysts show matrix calcifications, then you have to mention that foci of matrix calcifications are seen within the lesion.
NB in cases of colloid cyst, you can say
A well defined hyperdense SOL is seen in the midline plane in the region of the anterior part of the 3rd ventricle. Then mention the size and say showing no evidence of post contrast enhancement.
Most of the cysts are not surrounded by edema, but they exert a mass's
effect, then you have to mention the manifestation of the mass effect in the form of ------, -----, ------.
NB Colloid cyst may be associated with hydrocephalus due to compression of the foramina of monro.
NB In cases of dermoid cysts please look for fat globules in the
subarachnoid spaces (sulci, fissures, cisterns) as well as in the
ventricles. If they are present this means that the cyst has ruptured into
the subarachnoid space.
NB Hydatid cyst is described following the steps mentioned for glioma.
NB In cases of porencephalic cyst you should mention it's communication
with the ventricular system.
Normal posterior fossa [if no lesions in the posterior fossa].
n Scanned Para nasal sinuses are clear
OR Scanned Para nasal sinuses showed mucosal thickening in the --,------ (mention the name of the affected sinuses ) denoting sinusitis.
<Space occupying lesion
Acostic neuroma
A well defined SOL is seen in the ------- [left or right] cerebello- pontine
angle region extending inside the adjacent internal auditory canal which is
widened [or not]
The lesion measures ---- x ---- in maximal transverse diameters and shows
homogenous or heterogenous pattern of contrast enhancement.
The lesion is associated [or not] with widening ± pressure erosion of the
ipsilateral internal auditory canal.
Usually there is no edema around the lesions, but there is a mass effect .
Not mentioned because the lesion is located in the posterior fossa then
you can say
* No supratentorial extension (in cases with large lesions).
OR * No supratentorial abnormality seen
OR * Supratentorial hydrocephalic changes are seen secondary to
compression of the 4th ventricle by the lesion.
n Scanned Para nasal sinuses are clear
OR Scanned Para nasal sinuses showed mucosal thickening in the --,------ (mention the name of the affected sinuses ) denoting sinusitis.
<Space occupying lesion
Crainiopharyngioma
A well defined partly cystic and partly solid SOL is seen in the supra sellar
area with it's main bulk exactly in the midline plane [or slightly to the left or
right of the midline]
The lesion measures ---- x ---- in maximal transverse diameters and
shows homogenous or heterogenous pattern of contrast enhancement.
NB Note that the enhancement in craniopharyngioma is variable, the cystic component usually shows marginal or no enhancement while the solid component usually showed homogenous or heterogenous
enhancement with dense foci of calcification usually present.
Usually there is no edema, but mass effect is usually present in the form of
compression of the 3rd ventricle with consequent obstructive hydrocephalic
changes of both lateral ventricles.
NB The lesion may extend inside the sella [best seen in coronal images]or
may extend into the para sellar area or even into the posterior fossa via
the pre pontine cistern (rare)… These extension should be mentioned
Normal posterior fossa. If the lesion has extended into the posterior fossa
then you can say * No evidence of cerebellar or brain stem parenchymal
lesions
n Scanned Para nasal sinuses are clear
OR Scanned Para nasal sinuses showed mucosal thickening in the --,------ (mention the name of the affected sinuses ) denoting sinusitis.
<Space occupying lesion
Suprasellar meningioma, dermoid, …..
are described following the steps mentioned for craniopharengioma with careful attention to the difference in the enhancement pattern and the degree of mass effect as well as the variable extensions.
<Space occupying lesions
Intrasellar pituitary adenoma
A well defined intrasellar SOL is seen extending (or not) into the supra
sellar cistern.
The lesion measures ----x ----x ---- cm in maximal diameter and shows -----
pattern of enhancement [mention the type of enhancement].
NB The extensions of the lesion should be mentioned in details specially the supra sellar extension with obliteration of the suprasellar cistern [if present best seen in the coronal images], compression of the hypothalamus [ is known if the 3rd ventricle is compressed, if not this possibility is better assessed by MRI]
Also extension into the cavernous sinuses and affection of the internal carotid arteries.
NB Intrasellar extension with erosion of the sellar floor and invasion of the
sphenoid sinus usually indicate that this adenoma is invasive.
Usually there is no edema, but mass effect is usually present in the form of
compression of the 3rd ventricle with consequent obstructive hydrocephalic
changes of both lateral ventricles.
If there is no retrosellar extension, you mention that the posterior fossa
structures are normal
n Scanned Para nasal sinuses are clear
OR Scanned Paranasal sinuses showed mucosal thickening in the --,------ (mention the name of the affected sinuses ) denoting sinusitis.
NB In cases of microadenoma you can say
A well defined small focal lesion is seen within the ----- (left or right) aspect
of the pituitary gland.
The lesion usually shows less enhancement compared o the normal
pituitary tissue and may be associated with the following:
- Focal contour bulge of the superior or inferior surface of the pituitary gland (best seen in coronal images).
- Deviation of the infundibular stalk to the opposite (or may be to the same side)(also seen in coronal images).
The lesion is totally enclosed within the sella with no extrasellar extensions, no
edema, and no mass effect.
Mention that the cerebral parenchyma and ventricles
appear normal with no midline shift, also mention that the posterior fossa
structures are normal
n Scanned Para nasal sinuses are clear
OR Scanned Para nasal sinuses showed mucosal thickening in the --,------ (mention the name of the affected sinuses ) denoting sinusitis.
Intracranial calcification
<Bilateral symmetrical basal ganglia calcification
Bilateral almost symmetrical patchy areas of calcifications are seen
affecting the basal ganglia, mainly the caudate ± lentiform ± thalami
± dentate nuclei (in the cerebellum).
NB Foci or patches of calcifications may be present in the cerebral
parenchyma.
The lesions exert no mass effect with no detectable perifocal brain edema.
The lesions showed no post contrast enhancement. [if the patient was injected with contrast material]
Normal size and configuration of the ventricular system with no shift of the
mid line structures.
Normal posterior fossa (if no lesions are present in the posterior fossa ).
n Scanned Para nasal sinuses are clear
OR Scanned Para nasal sinuses showed mucosal thickening in the --,------ (mention the name of the affected sinuses ) denoting sinusitis.
<Periventricular calcifications
Multiple bilateral calcific foci are seen scattered in both cerebral
hemispheres mainly in the periventricular regions.
NB Some calcific foci may be adherent to the wall of the ventricle, then you
say that many or few of the calcific foci are subependymal in location.
The lesions exert no mass effect and showed no post contrast
enhancement.
Normal size and configuration of the ventricular system with no shift of the
mid line structures.
Normal posterior fossa (if no lesions are present in the posterior fossa ).
n Scanned Para nasal sinuses are clear
OR Scanned Para nasal sinuses showed mucosal thickening in the --,------ (mention the name of the affected sinuses ) denoting sinusitis.
<Gyral calcification
Well defined unilateral (or bilateral ) gyral pattern of calcification is seen
affecting ------ (mention the site of the lesion).
NB Associated findings that should be mentioned if present
* Focal atrophic changes related to the lesion.
* Thickening of the overlying calverial bones.
* Enlargement of the ipsilateral choroid plexus in the lateral ventricle.
The lesions exert no mass effect and showed no or minimal post contrast
enhancement
Normal size and configuration of the ventricular system with no shift of the
mid line structures.
Normal posterior fossa (if no lesions are present in the posterior fossa ).
n Scanned Para nasal sinuses are clear
OR Scanned Para nasal sinuses showed mucosal thickening in the --,------ (mention the name of the affected sinuses ) denoting sinusitis.
Intracrainal Vascular lesions
<Aneurysm
A well defined rounded ------x----- cm [mention the measurement of the
lesion] lesion is seen in the ------- [mention the site] common sites include:
- Suprasellar region to the left or right of the midline plane
- Within the sylvian fissure.
- In the prepontain cistern.
The lesion showed homogenous post contrast enhancement with no
perifocal brain edema around ± marginal curvilinear calcification.
NB If the lesion is more than 2cm (giant aneurysm), it may show internal thrombosis, then you can say that the lesion has a homogenously enhancing component which represents the patent lumen and a non enhancing component which represents the thrombosed part.
Normal size and configuration of the ventricular system with no midline
shift.
Normal posterior fossa (if no lesions are present in the posterior fossa ).
n Scanned Para nasal sinuses are clear
OR Scanned Para nasal sinuses showed mucosal thickening in the --,------ (mention the name of the affected sinuses ) denoting sinusitis.
<Aneurysm rupture
A well defined rounded ------x----- cm [mention the measurement of the
lesion] lesion is seen in the ------- [mention the site] common sites include:
- Suprasellar region to the left or right of the midline plane
- Within the sylvian fissure.
- In the prepontain cistern.
The lesion is surrounded by an irregular shaped area of recent blood
density measuring ------x----- cm. After contrast injection the lesion showed
homogenous post contrast enhancement with prefocal brain edema seen around the hematoma
The ventricles are usually dilated and may contain fresh blood density then
you can say: mild or moderate symmetrical dilatation of the supra and
infratentorial cerebral ventricles ± periventricular edema due to retrograde
transependymal CSF permeation ± intraventricular recent blood density
seen in the ------------ (mention the affected ventricles).
If blood is present in the 4th ventricle then you can say : normal
appearance of the brain stem and cerebellum, but do not write the usual
statement.
n Scanned Para nasal sinuses are clear
OR Scanned Para nasal sinuses showed mucosal thickening in the --,------ (mention the name of the affected sinuses ) denoting sinusitis.
<Arteriovenous malformation
A well efined area of abnormal vascularity is seen in ------
[mention the site of the lesion] showing serpigenous pattern of contrast
enhancement ± curvilinear matrix calcifications.
Perifocal brain edema may present and a mild mass effect may be also
seen then you should mention these findings.
NB Hypodense areas in the region of AVM usually represent ischemic areas due to direct blood shunting from the arterial to the venous side.
Normal size and configuration of the ventricular system with no midline
shift.
Normal posterior fossa (if no lesions are present in the posterior fossa ).
n Scanned Para nasal sinuses are clear
OR Scanned Para nasal sinuses showed mucosal thickening in the --,------ (mention the name of the affected sinuses ) denoting sinusitis.
<Cavernous hemangioma
A relatively well defined hyperdense lesion is seen ------ (mention the site of
the lesion ) showing ± foci of matrix calcifications.
The lesion showed no evident enhancement after contrast injection and is
not surrounded by perifocal brain edema.
NB No mass effect exerted by the lesion, if present you can say that the
lesion exerts minimal mass effect on the adjacent structures.
Normal size and configuration of the ventricular system with no midline
shift.
Normal posterior fossa (if no lesions are present in the posterior fossa ).
n Scanned Para nasal sinuses are clear
OR Scanned Para nasal sinuses showed mucosal thickening in the --,------ (mention the name of the affected sinuses ) denoting sinusitis.
< Intra ventricular lesions
A well defined --------- shaped (mention the shape of the lesion) is seen -----
(mention the site of the lesion).
Possible sites include:
- Centered on the region of the 4th ventricle midline posterior fossa.
- Within the body or frontal horn of the lateral ventricle (left / Right).
- Centered at the anterior aspect of the 3rd ventricle.
The lesion showed homogenous/ heterogenous pattern of enhancement
with ± foci of matrix calcifications. The surface of lesion appeared smooth
or lobulated.
The ipsilateral ventricle is dilated with ± per ventricular edema due to retrograde transependymal CSF permeation.
NB In cases of choired plexus papilloma , the whole ventricular system is
dilated due to communicating hydrocephalus secondary to CSF over production by the lesion.
NB If the tumor has penetrated the wall of the ventricle it will initiate brain
edema around, then maliganent transformation is suspected.
Normal posterior fossa (if no lesions are present in the posterior fossa ).
n Scanned Para nasal sinuses are clear
OR Scanned Para nasal sinuses showed mucosal thickening in the --,------ (mention the name of the affected sinuses ) denoting sinusitis.