Navigator-triggered and breath-hold 3D MRCP using compressed sensing: image quality and method selection factor assessment
To examine whether MRCP using a combination of compressed sensing and sensitivity encoding with navigator-triggered and breath-hold techniques (NT C-SENSE and BH C-SENSE, respectively) have comparable image quality to that of navigator-triggered MRCP using only sensitivity encoding (NT SENSE) at 1.5-T.
Fifty-one participants were enrolled in this prospective study between July and October 2018 and underwent the three 3D MRCP sequences each. The acquisition time and relative duct-to-periductal contrast ratios (RC values) of each bile duct segment were obtained. Visualization of the bile and main pancreatic ducts, background suppression, artifacts, and overall image quality were scored on 5-point scales. Mean and median differences in RC values and qualitative scores of NT C-SENSE and BH C-SENSE relative to NT SENSE were calculated with 95% confidence intervals (CIs).
Acquisition time of NT SENSE, NT C-SENSE, and BH C-SENSE were 348, 143 (mean for both), and 18 s (for all participants), respectively. The RC value of each bile duct segment was inferior, but the lower limits of the 95% CIs of the mean differences were ≥ − 0.10, for both NT C-SENSE and BH C-SENSE. The visualization score of the intrahepatic duct in BH C-SENSE was inferior to that in NT SENSE (lower 95% CI limit, − 1.5). In both NT C-SENSE and BH C-SENSE, the 95% CIs of the median differences in the other qualitative scores were from − 1.0 to 0.0.
NT C-SENSE and BH C-SENSE have comparable image quality to NT SENSE at 1.5-T.
KeywordsMagnetic resonance imaging Magnetic resonance cholangiopancreatography Bile duct Pancreatic duct
- BH C-SENSE
Breath-hold MRCP using a combination of compressed sensing and sensitivity encoding
Common bile duct
Interclass correlation coefficient
Left intrahepatic bile duct
Magnetic resonance cholangiopancreatography
- NT C-SENSE
Navigator-triggered MRCP using a combination of compressed sensing and sensitivity encoding
- NT SENSE
Navigator-triggered MRCP using sensitivity encoding
Relative duct-to-periductal contrast ratio
Right intrahepatic bile duct
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