Reduced Field-of-view Diffusion-Weighted Magnetic Resonance Imaging for Detecting Early Gastric Cancer: A Pilot Study...

Area of Science:

• Medical Imaging
• Oncology
• Radiology

Background:

• Early detection of gastric cancer (EGC) is crucial but challenging with current imaging methods.
• Reduced field-of-view diffusion-weighted imaging (rFOV DWI) offers enhanced visualization of small structures.
• This study compares rFOV DWI with CT and conventional fFOV DWI for EGC detection.

Purpose of the Study:

• To evaluate and compare the diagnostic performance of rFOV DWI against MDCT and fFOV DWI for EGC detection.
• To assess image quality metrics including SNR and CNR.
• To determine the sensitivity and specificity of each imaging modality.

Main Methods:

• Retrospective analysis of 43 EGC patients.
• Pre-treatment imaging included CT, prototype rFOV DWI, and conventional fFOV DWI at 3 Tesla.
• Quantitative (SNR, CNR) and qualitative assessments, ROC curve analysis.

Main Results:

• rFOV DWI showed significantly higher SNR and CNR than fFOV DWI (P < 0.05).
• rFOV DWI demonstrated superior sensitivity (0.705) compared to CT (0.636) and fFOV DWI (0.523).
• rFOV DWI achieved a higher AUC (0.829) than fFOV DWI (0.734, P = 0.02) and showed a modest improvement over CT (0.799).

Conclusions:

• rFOV DWI provides superior image quality and diagnostic accuracy for EGC detection over conventional fFOV DWI.
• rFOV DWI shows a trend towards better performance than CT, warranting further investigation.
• This technique may improve early diagnosis and clinical decision-making in gastric cancer management.