The invention provides a process for treating a polyester fiber comprising the steps of providing a bicomponent fiber comprising poly and poly which has been heat-treated at a first temperature and cooled to lower than about 70\xb0 C. The apparatus includes a heat sink, an LED mount, and an LED mounted on the LED mount. The device allows for simple, quick scans which are compensated for movement artifact and may then be transmitted electronically to local or regional medical facilities in advance of the patient’s arrival. The cutting edge cuts an annular opening in the wall of a hollow anatomical structure. A metal-filled groove in the polysilicon gate electrode is electrically connected to the gate metallization, and extends along a length of the trench underneath at least part of the source metallization.