The relationship between NMR spin-lattice relaxation times for human tumor tissue at 24 and 6.25 MHz.

ABSTRACT

The nuclear magnetic resonance (NMR) spin-lattice relaxation time (T1) of samples taken from human tumors was measured in vitro at Larmor frequencies of 24 and 6.25 MHz. It was found that on the average T1 at 6.25 MHz was linearly related to T1 at 24 MHz. An analogous set of measurements was performed on pieces of normal rat tissue. In this case, the relationship between T1 at the two frequencies was similar to that found for the human tumor tissue.