This invention provides methods of using Rhenium radioisotopes to detect and treat tumors that express a NaI symporter. The multipurpose memory controller may be configured to allocate a first plurality of the storage locations to a first image buffer configured to store image data, a second plurality of the storage locations to a first texture buffer configured to store texture data, and a third plurality of the storage locations to a first accumulation buffer configured to store accumulation buffer data. A first register stores a sequence of binary values that define a binary finite field element input. A valve is positioned within the spout body. In this blocking apparatus, the closure body, by means of a suitable flexible linkage to the device for rotating the closure body, is mounted such that it can move in the direction of the axis of rotation andor in a direction which is perpendicular with respect thereto, such that it slides on the sealing element. In some embodiments, a first wavelength range includes predominantly light having wavelengths between about 400 nm and about 620 nm and a second wavelength range includes predominantly light having wavelengths between about 620 nm and about 800 nm.