What is MR PET-like technology (WB-DWI) PET-like imaging is the latest development of magnetic resonance technology, “PET-like” is a more common term, generally referred to as “MR whole-body diffusion-weighted imaging. This technique has a very high sensitivity to tumor cells. Therefore, whole body specific tumor imaging similar to PET can be obtained and has similar clinical value to PET. Why is MR-based PE performed? Simply put, MR PET technology has several features: 1. low cost, the fee for PET/CT examination is usually around 10,000 RMB, while the fee for MR PET examination is only 2-3000 RMB; 2. high sensitivity, the statistical results of 16 patients who have undergone PET/CT examination and MR PET examination in Peking Union Medical College Hospital show that MR PET examination has higher sensitivity to tumor cells; 3. MR PET examination is suitable for those people who need medical checkups. It is suitable for: healthy people who need physical examination; screening for metastases throughout the body; screening for lymph node metastases; searching for primary foci after finding clear indications of malignant tumors; evaluating the effect of post-operative radiotherapy; monitoring the condition of malignant blood tumors.