"The damage that results from objects penetrating the brain is dependent on the size and trajectory of the object but also the amount of kinetic energy they deposit as they traverse tissues. Total energy is proportional to the mass of the object times the square of its velocity (E = 1/2mv2). In other words, most of the kinetic energy available is due to velocity, explaining why a small bullet can do far more damage than a much larger object (e.g. knife blade) and why the patterns of injury for high-velocity objects is different to low-velocity ones."
"The damage that results from objects penetrating the brain is dependent on the size and trajectory of the object but also the amount of kinetic energy they deposit as they traverse tissues. Total energy is proportional to the mass of the object times the square of its velocity (E = 1/2mv2). In other words, most of the kinetic energy available is due to velocity, explaining why a small bullet can do far more damage than a much larger object (e.g. knife blade) and why the patterns of injury for high-velocity objects is different to low-velocity ones."
Expected headings
"CT"
"As is the case with high-velocity penetrating brain injuries, CT and CT angiography are the cornerstones of emergent imaging of all patients with penetrating injuries. Plain films have largely been replaced by CT and MRI is usually not indicated until later in the admission if at all. Of particular importance is the possibility that the penetrating material is ferromagnetic precluding safe MRI."