Department of Radiology, Yantaishan Hospital, Yantai, China.
Diagnostic Radiology Division, 970 Hospital of the PLA JLSF, Yantai, China.
Contrast Media Mol Imaging. 2022 Jul 21;2022:5799815. doi: 10.1155/2022/5799815. eCollection 2022.
The aim of this study was to evaluate the value of whole body magnetic resonance diffusion-weighted imaging (WB-DWI) combined with routine scanning in the diagnosis of body tumors. Sixty-three patients with surgically and pathologically confirmed body tumors admitted to our hospital from October 2019 to October 2021 were scanned by WB-DWI using a 1.5TMR body coil. The images were reconstructed by a three-dimensional maximum intensity projection (3D-MIP) and black-white inversion technique. The lesions detected by WB-DWI were all plain MRI, and 35 cases were enhanced MRI. The number of lesions detected by WB-DWI and WB-DWI combined with routine scanning and the number of cases matching diagnosis were compared. The WB-DWI images of tumor lesions were analyzed, and the apparent diffusion coefficient (ADC) of the lesions was measured, and the ADC value of benign and malignant lesions was compared. There were 236 lesions in 63 patients with clinically confirmed tumors. 46 cases were diagnosed by WB-DWI, the diagnostic coincidence rate was 73.0%, and 207 lesions were detected. Fifty-eight cases were diagnosed by WB-DWI combined with routine scanning, the diagnostic coincidence rate was 92.1%, 236 lesions were detected. There were statistically significant differences in the number of lesions detected and the coincidence rate of tumor diagnosis between the two groups ( < 0.05). The average ADC value of malignant tumor ((1.04 ± 0.46) × 10 mm/s) was lower than that of benign tumor ((2.53 ± 0.43) × 10 mm/s), and the difference was statistically significant ( < 0.05). In conclusion, MR whole-body diffusion weighted imaging is safe, efficient, radiation-free, and highly sensitive, which is of great significance in the differential diagnosis of benign and malignant lesions. WB-DWI combined with MR routine scanning can further improve the detection rate of lesions and the coincidence rate of tumor diagnosis.
本研究旨在评估全身磁共振扩散加权成像（WB-DWI）结合常规扫描在诊断体部肿瘤中的价值。2019 年 10 月至 2021 年 10 月，我院收治 63 例经手术和病理证实的体部肿瘤患者，采用 1.5TMR 体线圈行 WB-DWI 扫描，图像经三维最大强度投影（3D-MIP）及黑白反转技术重建。WB-DWI 检出的病灶均为平扫 MRI，增强 MRI 35 例。比较 WB-DWI 与 WB-DWI 联合常规扫描检出病灶数目及与诊断符合例数。分析肿瘤病灶 WB-DWI 图像，测量病灶表观扩散系数（ADC）值，并比较良恶性病灶 ADC 值。63 例经临床证实有肿瘤的患者共 236 个病灶。WB-DWI 诊断 46 例，诊断符合率为 73.0%，检出病灶 207 个。WB-DWI 联合常规扫描诊断 58 例，诊断符合率为 92.1%，检出病灶 236 个。两组病灶检出数目及肿瘤诊断符合率比较，差异均有统计学意义（ < 0.05）。恶性肿瘤平均 ADC 值（（1.04±0.46）×10mm/s）低于良性肿瘤（（2.53±0.43）×10mm/s），差异有统计学意义（ < 0.05）。结论：MR 全身扩散加权成像安全、高效、无辐射，对良恶性病变的鉴别诊断具有重要意义。WB-DWI 联合 MR 常规扫描可进一步提高病灶检出率及肿瘤诊断符合率。
