Preoperative fast MRI of brain tumors using three-dimensional segmented echo planar imaging compared to...

Area of Science:

• Radiology
• Medical Imaging
• Neuroimaging

Background:

• Conventional T(1)-weighted 3D spoiled gradient echo (3D GRE) sequences are standard for preoperative brain imaging.
• Optimizing scan time while maintaining diagnostic quality is crucial in neuroimaging.

Purpose of the Study:

• To compare the diagnostic efficacy of a novel T(1)-weighted 3D segmented echo planar imaging (3D EPI) sequence against conventional 3D GRE for evaluating brain tumors.
• To assess image quality metrics including lesion conspicuity, tissue contrast, and artifacts.

Main Methods:

• Forty-four patients with brain tumors or infections underwent MRI on a 1.0 T scanner.
• Both T(1)-weighted 3D EPI and 3D GRE sequences were acquired after contrast administration.
• Radiologists qualitatively assessed images, and quantitative signal-to-noise and contrast-to-noise ratios (C/N) were calculated.

Main Results:

• The 3D EPI sequence achieved a 50% reduction in scan time (2 min 12 s vs. 4 min 59 s).
• Qualitative lesion detection and conspicuity were similar between the two sequences.
• While gray-white matter differentiation and C/N ratio were slightly inferior for 3D EPI, the differences were not statistically significant.

Conclusions:

• The T(1)-weighted 3D EPI technique provides a significant reduction in scan time with acceptable image quality for brain tumor evaluation.
• 3D EPI may serve as a viable alternative to conventional 3D GRE for preoperative neuroimaging, improving patient throughput.