Accurate staging is critical for effective gastric cancer treatment planning. Conventional DWI (C-DWI) has limitations in image quality due to magnetic field inhomogeneity, which hampers precise T staging.

This study aims to compare the image quality and T staging accuracy of C-DWI, TSE-DWI, and ZOOMit-DWI (Z-DWI) sequences in MRI examinations of gastric cancer patients.

A prospective study plan to enroll 72 gastric cancer patients undergoing preoperative MRI with C-DWI, TSE-DWI, and Z-DWI sequences using a 3.0 T scanner. Quantitative metrics (ADC, SNR, CNR) and image quality were evaluated. T staging accuracy was assessed by comparing MRI results with postoperative pathological staging using ROC analysis.

Inclusion Criteria:

1. The patient was diagnosed with gastric cancer by pathological biopsy
2. No biopsy was taken within 1 week before MR Examination to rule out the effect of bleeding on the image
3. No contraindications for MRI examination; And exclude serious heart, liver, kidney, cerebrovascular diseases.

Exclusion Criteria:

1. The image quality cannot meet the diagnostic criteria;
2. Patients could not tolerate MRI examination, resulting in incomplete MR-related sequence image data.