Navigator-triggered and breath-hold 3D MRCP using compressed sensing: image quality and method selection factor...

Area of Science:

• Radiology
• Medical Imaging
• Magnetic Resonance Imaging

Background:

• Magnetic Resonance Cholangiopancreatography (MRCP) is crucial for visualizing the biliary and pancreatic ducts.
• Standard MRCP techniques can be time-consuming and may be affected by patient motion.
• Advancements in MR imaging, such as compressed sensing and sensitivity encoding, aim to improve efficiency and image quality.

Purpose of the Study:

• To evaluate the image quality of MRCP using compressed sensing with navigator-triggered (NT C-SENSE) and breath-hold (BH C-SENSE) techniques.
• To compare these novel techniques against standard navigator-triggered MRCP with sensitivity encoding (NT SENSE) at 1.5-T.

Main Methods:

• A prospective study involving 51 participants who underwent three 3D MRCP sequences.
• Acquisition times, duct-to-periductal contrast ratios (RC values), and qualitative scores for visualization, background suppression, and artifacts were assessed.
• Statistical analysis included calculating mean and median differences with 95% confidence intervals (CIs).

Main Results:

• Acquisition times were significantly reduced for NT C-SENSE (143s) and BH C-SENSE (18s) compared to NT SENSE (348s).
• While RC values were slightly inferior for NT C-SENSE and BH C-SENSE, the differences were within acceptable limits (95% CIs ≥ -0.10).
• Qualitative scores for most aspects were comparable, with BH C-SENSE showing slightly lower intrahepatic duct visualization (95% CI limit, -1.5).

Conclusions:

• Navigator-triggered compressed sensing (NT C-SENSE) and breath-hold compressed sensing (BH C-SENSE) provide image quality comparable to standard navigator-triggered MRCP (NT SENSE) at 1.5-T.
• These advanced techniques offer substantial reductions in acquisition time, enhancing patient comfort and throughput.
• NT C-SENSE and BH C-SENSE represent viable alternatives for clinical MRCP, maintaining diagnostic efficacy with improved efficiency.