Which term is used to describe the modern version of the spin echo sequence?

The term "Fast spin echo" refers to the modern version of the spin echo sequence. This technique enhances the traditional spin echo by reducing the time required to acquire images, allowing for greater efficiency in scanning and improved patient throughput. Fast spin echo sequences utilize multiple refocusing pulses, enabling the acquisition of several echo signals in a single repetition time (TR), which results in a quicker scan while retaining the contrast and detail characteristic of standard spin echo sequences.

This innovation is particularly beneficial in clinical settings, as it helps to minimize the impact of patient motion and reduces scan times without a significant loss in image quality. Fast spin echo sequences have become a staple in MRI protocols due to their versatility and effectiveness in producing high-quality images across various clinical applications.