8/3/2019 Brain space occupying lesions .

1/18

BRAIN SPACE OCCUPYING LESIONS

Role of conventional radiograph

No significant roleRole of CT and MRI exact location nature (cystic or solid or mixed) benign or malignant appearing

extent and staging

essential in preoperative plan

points that help diagnosis margin

homogeneity

density or intensity

perifocal edema

mass effect

contrast behavior

contents (air, fat ,CSF, protein, etc.)

associated calcification

associated hemorrhage

8/3/2019 Brain space occupying lesions .

2/18

CT protocols

routinely axial cuts

direct coronal

reconstruction

contrast use

window settings(bone and soft-tissue)

calcification

cortical bony masses

acute hemorrhage

short time

MRI

Advantages

Multiplanner

Excellent soft-tissuedifferentiation

Avoid posterior fossa artifact

MR angiography without contrast

Of choice in evaluation of cranialnerve lesions

Has advantage for

8/3/2019 Brain space occupying lesions .

3/18

Protocols

T1WIs axial coronal and sagittal

T2WIs same FLAIR(for attenuation of CSF) STIR (for fat suppression )Pituitary (T1 coronal with and without contrastMedullary cervical junction best seen on sagittal T2

Brain space occupying lesion can be

---- neoplastic (benign , malignant, metastasis. Cystic or solid or mixed) supraor infra tentorial , intraventricular

---- inflammatory---- vascular---- traumatic---- bony extension

8/3/2019 Brain space occupying lesions .

4/18

8/3/2019 Brain space occupying lesions .

5/18

8/3/2019 Brain space occupying lesions .

6/18

8/3/2019 Brain space occupying lesions .

7/18

8/3/2019 Brain space occupying lesions .

8/18

8/3/2019 Brain space occupying lesions .

9/18

8/3/2019 Brain space occupying lesions .

10/18

8/3/2019 Brain space occupying lesions .

11/18

8/3/2019 Brain space occupying lesions .

12/18

8/3/2019 Brain space occupying lesions .

13/18

8/3/2019 Brain space occupying lesions .

14/18

8/3/2019 Brain space occupying lesions .

15/18

8/3/2019 Brain space occupying lesions .

16/18

8/3/2019 Brain space occupying lesions .

17/18

8/3/2019 Brain space occupying lesions .

18/18