Clinical evaluation of a speed optimized T2 weighted fast spin echo sequence at 3.0 T using variable flip angle...

Area of Science:

• Radiology
• Neuroimaging
• Magnetic Resonance Imaging

Background:

• Multiple Sclerosis (MS) diagnosis relies on detecting white matter lesions.
• Standard T(2) weighted single-shot turbo spin echo (sTSE) sequences are time-consuming.
• Faster imaging techniques are needed to improve patient comfort and throughput.

Purpose of the Study:

• To evaluate the performance of a speed-optimized FAS-TSE sequence against a standard TSE sequence.
• To compare lesion detectability, contrast, and image quality in patients with suspected MS.
• To assess the utility of FAS-TSE for rapid whole-brain imaging.

Main Methods:

• A prospective study comparing FAS-TSE and sTSE sequences in 33 patients with clinically isolated syndrome (CIS).
• Both sequences were acquired on a 3.0 T MR system with identical contrast and resolution parameters.
• Evaluated metrics included lesion detection, lesion/white matter contrast, grey/white matter contrast, image quality, and artifacts.

Main Results:

• FAS-TSE achieved a scan time of 11 seconds compared to 122 seconds for sTSE.
• sTSE detected 208 lesions, while FAS-TSE detected 183 lesions (88% detection rate).
• FAS-TSE showed inferior lesion contrast but superior performance in reducing motion artifacts.

Conclusions:

• FAS-TSE offers sufficient diagnostic image quality for whole-brain MS screening in significantly reduced scan times.
• Its speed and motion artifact reduction make it suitable for restless patients and rapid multi-planar imaging.
• Further optimization may enhance lesion contrast for comprehensive MS assessment.