Final answer:
For T1 weighted MRI images, the standard TR range is 400 - 600 ms and the TE range is around 10 - 20 ms. These settings allow for the generation of images with enhanced contrast using the tissue's relaxation properties.
Step-by-step explanation:
The student's question pertains to the parameters used in magnetic resonance imaging (MRI) for acquiring T1 weighted images. These images are available for enhancing contrast in MRI scans and are particularly useful in differentiating between different types of tissues and abnormalities such as inflammation.
For T1 weighted images, the typical repetition time (TR) range is 400 - 600 ms, and the typical echo time (TE) range is shorter, usually around 10 - 20 ms. These times facilitate the use of T1 relaxation mechanisms of nuclei to generate contrast in the images, allowing for the differentiation of tissues based on their proton density and the rate at which they return to equilibrium after the external field is turned off.
In MRI technology, understanding relaxation times and how they affect image contrast is critical for various scans, including brain scans using technetium-99m (99m Tc) and thyroid scans using iodine-131 (131 I) and iodine-123 (123 I).