3D T2-weighted imaging to shorten multiparametric prostate MRI protocols

Area of Science:

• Radiology
• Medical Imaging
• Oncology

Background:

• Prostate cancer diagnosis relies on Magnetic Resonance Imaging (MRI).
• T2-weighted imaging is crucial for prostate MRI protocols.
• Optimizing MRI protocols is essential for clinical efficiency.

Purpose of the Study:

• To compare the diagnostic performance of 3D vs. 2D T2-weighted imaging for prostate MRI.
• To evaluate image quality and lesion delineation between 3D and 2D T2w sequences.
• To assess the Prostate Imaging Reporting and Data System (PI-RADS) v2 performance of both acquisition methods.

Main Methods:

• Prospective study of 150 patients undergoing 3 Tesla (3T) prostate MRI.
• Independent review of 2D and 3D T2-weighted image datasets by two uroradiologists.
• Assessment of image quality and lesion delineation using a five-point scale.
• Comparison of diagnostic performance using receiver operating characteristic (ROC) and area under the curve (AUC) analysis.

Main Results:

• Image quality and lesion delineation were rated similarly excellent for both 2D and 3D T2-weighted imaging (p > 0.05).
• Receiver operating characteristic analysis demonstrated equivalent diagnostic performance between 2D and 3D T2w acquisitions (AUCs comparable, p > 0.05).
• The use of 3D T2w imaging could potentially reduce prostate MRI protocol times by up to 40%.

Conclusions:

• Three-dimensional T2-weighted imaging provides equivalent image quality, lesion delineation, and PI-RADS v2 performance compared to 2D acquisitions.
• 3D T2w imaging is a viable alternative to 2D, potentially enabling shorter and more efficient prostate MRI protocols.
• Integration of 3D T2w with short dynamic contrast-enhanced (DCE) sequences allows for feasible 10-minute multiparametric MRI protocols.