(2) 腰椎 MRI 检查使用德国 SIEMENS 公司 Avanto 1.5T 超导 MRI 成像仪 , 梯度场强 45 mT/m , 切换率 200 mT/(m·s),采用8通道体部相控阵线圈,包括全部 腰椎,进行常规快速自旋回波矢状面T1WI,T2WI,脂肪 抑制-T2WI.各序列成像参数见表1. 表 1 腰椎 MRI 序列参数表 Table 1 MRI sequence parameters of...
combiningsinglesequencemodelandjointsequencemodelRad-scorewithpreoperativeclinicalcandidate featurevariables.Fortheevaluationofthepredictiveperformanceofeachmodel,AUCvalue,specificity, andsensitivityareusedaspredictiveindicators.Basedontheoptimalmodel,establishacolumnchartto ...
with an accuracy of 0.827, sensitivity of 0.844, specificity of 0.773, and precision of 0.799. In conclusion, the combined multi-sequence MRI based radiomics model enables preoperative noninvasive prediction of the ki-67 expression
Usefulness of preoperative breast magnetic resonance imaging with a dedicated axillary sequence for the detection of axillary lymph node metastasis in patients with early ductal breast cancer. Radiol Med. 2019;124:1220–8. Article PubMed Google Scholar Guvenc I, Whitman GJ, Liu P, Yalniz C, Ma...
Clinical electrical stimulation systems — such as pacemakers and deep brain stimulators (DBS) — are an increasingly common therapeutic option to treat a large range of medical conditions. Despite their remarkable success, one of the significant limitat
2D sequences achieved a 4fold acceleration and 3D sequences achieved 13-fold acceleration. MRI Knee Dratsch et al. 202333 SENSE (2), CS and CS-AI (10,13,15,17) Ingenia 3.0T MRI (Philips Healthcare) 20 Healthy volunteers Image quality Qualitative assessment The qualitative image analysis ...
1.5 T and 3 T MRI scans with 4 defined sequences (T2-TSE, T2-TIRM, T1-3D-MPRAGE, and TDI) were performed on a phantom with a CI (SYNCHRONY System by MED-EL Austria) in place. The resulting MRI artifacts were retrospectively compared to MRI artifacts observed in patients with a CI....
Overall, 12 patients with OF and 57 patients with BLM were excluded based on the following criteria: (1) the preoperative MRI scan was absent or lacked one of the following sequences: DWI, apparent diffusion coefficient (ADC) map, or dynamic contrast-enhanced (DCE) (n = 24); (2) ...
MiWi P2P uses a direct-sequence spread spectrum (DSSS) modulation technique to transmit data. The technique multiplies the data with a pseudorandom sequence before transmission. This can support data transmission rates of up to 250 kbps although typical data rates may be closer to 25 kbps. MiWi...
wherein the multi-shot interleaved MRI pulse sequences are associated with interleaved echo-planar imaging (EPI) which generates EPI segments as the multiple segments or interleaved fast spin-echo (FSE) imaging which generates FSE segments as the multiple segments, wherein the estimating motion induc...