Diffusion-time dependent diffusion MRI: effect of diffusion-time on microstructural mapping and prediction of prognostic features in breast cancer

被引:30
作者
Ba, Ruicheng [1 ]
Wang, Xiaoxia [2 ]
Zhang, Zelin [1 ]
Li, Qing [3 ]
Sun, Yi [3 ]
Zhang, Jiuquan [2 ]
Wu, Dan [1 ]
机构
[1] Zhejiang Univ, Coll Biomed Engn & Instrument Sci, Dept Biomed Engn, Key Lab Biomed Engn Minist Educ, Room 525,Zhou Yiqing Bldg,Yuquan Campus, Hangzhou 310027, Peoples R China
[2] Chongqing Univ, Canc Hosp, Dept Radiol, Chongqing 400030, Peoples R China
[3] Siemens Healthineers Ltd, MR Collaborat, Shanghai, Peoples R China
基金
中国国家自然科学基金;
关键词
Diffusion magnetic resonance imaging; Breast neoplasms; Feasibility studies; Prognosis; INTERNATIONAL EXPERT CONSENSUS; INVASIVE DUCTAL CARCINOMA; CELL-SIZE; COEFFICIENT VALUES; PRIMARY THERAPY; QUANTIFICATION; HIGHLIGHTS;
D O I
10.1007/s00330-023-09623-y
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
ObjectivesThis study aimed to evaluate the effect of achievable t(d) on the accuracy of microstructural mapping based on simulation and patient experiments, and investigate the feasibility of t(d)-dMRI in distinguishing prognostic factors in breast cancer patients.MethodsSimulation was performed using different t(d) settings. Patients with breast cancer were enrolled prospectively between November 2020 and January 2021, who underwent oscillating and pulsed gradient encoded dMRI on a 3-T scanner using short-/long-t(d) protocol with oscillating frequency up to 50/33 Hz. Data were fitted with a two-compartment model to estimate cell diameter (d), intracellular fraction (f(in)), and diffusivities. Estimated microstructural markers were used to differentiate immunohistochemical receptor status and the presence of lymph node (LN), which were correlated with histopathological measurements.ResultsSimulation results showed that d fitted from the short-t(d) protocol significantly reduced estimation error than those from long-t(d) (2.07 +/- 1.51% versus 3.05 +/- 1.92%, p < 0.0001) while the estimation error of f(in) was robust to different protocols. Among a total of 37 breast cancer patients, the estimated d was significantly higher in HER2-positive and LN-positive (p < 0.05) groups compared to their negative counterparts only using the short-t(d) protocol. Histopathological validation in a subset of 6 patients with whole slide images showed the estimated d was highly correlated with measurements from H&E staining (r = 0.84, p = 0.03) only using the short-t(d) protocol.ConclusionsThe results indicated the necessity of short-t(d) for accurate microstructural mapping in breast cancer. The current t(d)-dMRI with a total acquisition time of 4.5 min showed its potential in the diagnosis of breast cancer.
引用
收藏
页码:6226 / 6237
页数:12
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