introduction the gamma knife system is designed solely for non-invasive treatment of brain disorders, and it benefits from stereotactic surgical techniques. dose calculations required in the system are performed by gammaplan code; in this code, brain tissue is considered uniform. in the present study, we evaluated the effect of gamma knife system on the obtained dose through simulating a real h...

A 38-year-old man presented to a regional Western Australian hospital after being stabbed in his left eye with a knife. Computerized Tomography (CT) revealed a 7 cm knife blade within the globe extending along the skull base. After transfer to a tertiary hospital, a cerebral angiogram was performed, excluding significant cerebral vascular involvement. Through a multidisciplinary approach with t...

The Leksell Gamma Knife [Elekta Corp] uses helmets as collimators to produce four standard beam sizes. The nominal beam diameters are 18, 14, 8, and 4 mm. During computer treatment planning for gamma knife stereotactic radiosurgery, the size of the treated volume may differ from the standard beam sizes. To maintain conformality of the isodose curves to the treated volume, beam sizes may be supe...

Three varieties of wheat and knife bevel angles, four levels of moisture content and three shearing speeds of pendulum were considered to determine their effects on the shearing energy of wheat straw. Results showed that the effects of variety, knife bevel angle, moisture content and shearing speed on shearing energy were significant (P<0.01). Shearing energy decreased with decreasing moisture ...

Trigeminal neuralgia (TN) is a disabling pain condition that has classically been treated using either surgical or medical techniques. Several researchers have shown that stereotactically delivered radiation can be an effective tool in the amelioration of this condition. For these studies, the Gamma Knife was used to deliver the radiation treatment. The target location was designated as the pro...

The annual incidence of traumatic spinal cord injury worldwide is estimated to be 35 patients per million. Nonmissile penetrating spinal injuries most commonly occur in the thoracic region, and the majority has neurologic deficits on admission. The management of patients who lack neurologic deficits is controversial due to the risk of neurologic status alteration intraoperatively. However, fail...

BACKGROUND Endovascular therapy (ET) is infrequently used in the setting of acute penetrating intracranial trauma. METHODS We report a case where ET was used immediately prior to and following removal of an embedded intracranial knife, which was found to be disrupting the anterior cerebral artery. RESULTS The proximal vessel was coiled and angiographically occluded and then the knife was re...

Trochlear nerve schwannomas are extremely rare. We present a surgically excised case of trochlear nerve schwannoma followed by Gamma Knife (ELEKTA, Stockholm, Sweden) after histologic confirmation. A 52-year-old man presented with diplopia, gait disturbance, and sensory disturbance. Magnetic resonance imaging demonstrated a large cystic mass at ambient cistern on the right side. Subtotal excisi...

The presented work deals with an analysis of causes the very low service life new version hand woodworking planing knife, which has replaced original a knife. Based on performed experimental works, chemical analysis, macroscopic and microscopic observation, SEM, diffractometric Vickers hardness test it was concluded that cause for (practically nonexistent one) knife are significant features ove...