Future Minimally Invasive Systems

Following the concept of minimal invasion, several technologies are now being developed that may further change our capacity to deal with specific tumors. One of these is laser hypothermia, in which a laser fiber is introduced to the center of a lesion (64). The changes that occur with heating can be followed nicely, and the patient can have complete destruction of the lesion. Examples of this use include a hypothalamic hamartoma or low-grade glioma of the hypothalamus.

A second future potential therapy is focused ultrasound (65-67). With the capacity to calculate differential absorption of energy through the skull, it is possible to develop the technology of multiple source high-energy ultrasound that can destroy a target noninvasively. This is still in the development phase but may be an important addition as well. (See Chapter 12.)

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