MRV OF BRAIN

 

MRV Brain

PREPARATION

1. X-ray or MRI or CT Scan or  USG Films/Images with Reports
2. Blood for Serum Creatinine (If Contrast)
3. FNAC/Biopsy Test Reports
4. Old Documents
5. Operation Note (If Post Oparation)
6. Covid /RAT Test for Covid-19

PROTOCOL (PHILIPS) SERVEY S3D_PCA_VENO  VENO

INDICATION

1. Evaluation of thrombosis
2. Tumour of the cerebral venous sinus
3. Drowsiness and confusion accompanying a headache

PLANNING

Picture: MRV of Brain 3D Planning

                                                     Picture: MRV of Brain 

Anatomy of MRV.

The central nervous system consists of the cerebrum, cerebellum, brainstem and spinal cord. Their venous drainage is complex, and rather uniquely, does not follow the arterial supply.

The cerebrum, cerebellum and brainstem are drained by numerous veins, which empty into the dural venous sinuses. The spinal cord is supplied by anterior and posterior spinal veins, which drain into the internal and external vertebral plexuses.

In this article, we shall consider the venous drainage of the central nervous system. We will discuss the dural venous sinuses, cerebral veins, spinal veins, and consider the clinical relevance of the described anatomy.

Dural Venous Sinuses

The dural venous sinuses lie between the periosteal and meningeal layers of the dura mater. They are best thought of as collecting pools of blood, which drain the central nervous system, the face, and the scalp. All the dural venous sinuses ultimately drain into the internal jugular vein. Unlike most veins of the body, the dural venous sinuses do not have valves.

There are eleven venous sinuses in total. The straight, superior, and inferior sagittal sinuses are found in the falx cerebri of the dura mater. They converge at the confluence of sinuses (overlying the internal occipital protuberance). The straight sinus is a continuation of the great cerebral vein and the inferior sagittal sinus.

From the confluence, the transverse sinus continues bi-laterally and curves into the sigmoid sinus to meet the opening of the internal jugular vein.

The cavernous sinus drains the ophthalmic veins and can be found on either side of the sella turcica. From here, the blood returns to the internal jugular vein via the superior or inferior petrosal sinuses.

Figure 1 – Sagittal section showing the dural venous sinuses and the great cerebral vein.