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[Clinical efficacy of 3D-MR cholangiopancreatography (MRCP) with the T2Plus technique]
Toshiya Azuma1, Hiroshi Sugimura, Kenichirou Yamaguchi
1Department of Clinical Radiology, Miyazaki University Hospital.
Abstract:
The T2Plus technique is an MR method in which longitudinal magnetization is recovered by the application of a -90 degrees radiofrequency pulse in the recovery period after data acquisition. The present study was performed to evaluate the efficacy of the 3D-fast advanced spin echo (FASE) sequence with T2Plus technique in improving the image quality of respiratory-triggered 3D-MRCP. We performed a phantom study and clinical study in 60 cases. In the clinical study, ERCP and CT images were used as the gold standard for evaluating visualization of the pancreato-biliary system with the T2Plus technique. In the phantom study, the signal-to-noise ratio (SNR) of distilled water was higher in the shorter TR owing to the effectiveness of the T2Plus technique. The contrast-to-noise ratio (CNR) of the biliary tract and the pancreatic duct to the liver were significantly higher (P<0.05) with the T2Plus technique. On visual evaluation by two experienced abdominal radiologists, the left and right hepatic duct, common hepatic duct, common bile duct, main pancreatic duct, and accessory pancreatic duct were visualized more clearly with the T2Plus technique (P<0.05). Improvement of the image quality of MRCP can be obtained by applying the T2Plus technique.
Insights
The T2Plus technique enhances Magnetic Resonance Cholangiopancreatography (MRCP) image quality. This method improves visualization of the pancreato-biliary system, aiding in diagnosis.
Area of Science:
- Radiology
- Medical Imaging
- Magnetic Resonance Imaging
Background:
- Magnetic Resonance Cholangiopancreatography (MRCP) is crucial for visualizing the pancreato-biliary system.
- Improving MRCP image quality is essential for accurate diagnosis.
Purpose of the Study:
- To evaluate the efficacy of the T2Plus technique in enhancing 3D-fast advanced spin echo (FASE) MRCP image quality.
- To assess the T2Plus technique's impact on the visualization of the pancreato-biliary system.
Main Methods:
- A phantom study and a clinical study involving 60 cases were conducted.
- The T2Plus technique was applied to respiratory-triggered 3D-MRCP.
- Endoscopic retrograde cholangiopancreatography (ERCP) and CT images served as gold standards for comparison.
Main Results:
- The T2Plus technique significantly increased the signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) in phantom studies.
- Clinical evaluation showed significantly clearer visualization of hepatic ducts, common bile duct, and pancreatic ducts (P<0.05).
Conclusions:
- The T2Plus technique effectively improves the image quality of respiratory-triggered 3D-MRCP.
- This enhancement aids in better visualization of the pancreato-biliary system, potentially improving diagnostic accuracy.
