Health blog for Medical Park Brain and Nerve Surgery Center
Specially designed stereotactic helmet, one key component of Leksell Gamma Knife device, enables your surgeon identify the tumor or diseases area a “pinpoint” precision. This helmet is placed on and fixed to your head using four small screws and it ensures that beams are precisely delivered to the target. This helmet completely immobilizes your head during the procedure and accordingly, beams are precisely focused on the target area in your brain.
A series of advanced imaging study, such as MRI or CT, will be required in order to precisely determine size, shape and location of the tumor, lesion or abnormality, while helmet is on the head of the patient. Angiogram may be also necessary, if your physician treats a vascular abnormality. Angiogram includes intravenous administration of an opaque substance and therefore, imaging study will clearly show cerebral veins and arteries. Coordinates on the helmet form a part of images, which will be used by your neurosurgeon to make a precise plan for the procedure.
There are two important aspects that differentiate Gamma Knife from conventional radiotherapy.
1. Beams are characterized with anatomic tissue selectivity. The error margin is 0.2 mm, thanks to the anatomic selectivity. However, healthy tissue is exposed to radiation beams, along with the tumor, in conventional therapy, resulting with further risk of tissue damage.
2. For Gamma Knife surgery, energy delivered to tumor tissue is equal to sum of the energy delivered to the tumor in 30 sessions of conventional radiotherapy. Therefore, this therapy is not organized in sessions. Radiation beams are accurately delivered to the target tissue, since this therapy is characterized with high-dose selectivity. Superior anatomic selectivity is the reason to name this modality as “Gamma Knife”. Therefore, neurosurgeons use this technique. It is one of neurosurgical procedures and a type of surgery. It is used as alternative or to complement a surgery, rather than radiotherapy.
Intracranial hemorrhages are medical conditions, which threat life and are characterized with sudden onset and disabling outcomes. This condition is among common underlying causes, along with myocardial infarction, of unexpected and sudden death. The medicine is no more totally desperate for management of intracranial hemorrhages, which is publicly regarded as a condition, which is associated with poor outcomes and leads to disabling sequel.
Intracranial hemorrhages have traumatic etiologies, or in other words, they are secondary to impacts, crashes and accidents or they may associated with other medical conditions, including but not limited to hypertension and aneurysm, while hemorrhage can be an isolated spontaneous event. Post-traumatic intracranial hemorrhages have different clinical pictures, while severity may vary and they occur at different localizations. Post-traumatic intracranial hemorrhage may be in the form of contusion – bruising-like bleeding foci, while bleeding into the space between brain and the dura mater is referred as subdural hematoma and epidural hematoma implies the bleeding into the space between the skull and the dura mater. Bleeding is stopped and hematoma is aspirated with surgical intervention for some hemorrhages, while medication therapy and critical care will be also sufficient for some patients.