Magnetic Resonance Imaging of Rat Head with a High-Strength (4.7 T) Magnetic Field

抄録

This study was designed to seek the appropriate scanning parameters for T₁ and T₂ weighted images of rat head by use of a high (4.7 T) magnetic field strength magnetic resonance imaging unit. The optimum values of variables for T₁ weighted images were considered to be a time of repetition of 1,000 msec, and for T₂ weighted images, 8 echoes. When the sagittal images of a healthy rat head were scanned using these optimum values, the cerebrum, cerebellum, olfactory bulb, pituitary gland, pineal gland, spinal cord, tongue, nasopharynx, nasal conchae, vermis and cerebrospinal fluid were clearly observed in either T₁ or T₂ weighted images. Moreover, a primary brain tumor induced by ethylnitrosourea was depicted as a high signal intensity mass in T₂ and contrast-enhanced T₁ weighted images.