首页> 外文期刊>The Egyptian Journal of Radiology and Nuclear Medicine >Diagnostic impact of echo planar diffusion-weighted magnetic resonance imaging (DWI) in musculoskeletal neoplastic masses using apparent diffusion coefficient (ADC) mapping as a quantitative assessment tool
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Diagnostic impact of echo planar diffusion-weighted magnetic resonance imaging (DWI) in musculoskeletal neoplastic masses using apparent diffusion coefficient (ADC) mapping as a quantitative assessment tool

机译:使用表观扩散系数(ADC)映射作为定量评估工具的回声平面扩散加权磁共振成像(DWI)对肌肉骨骼肿瘤性肿块的诊断影响

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Purpose To evaluate the diagnostic impact of echo planar DW imaging in distinguishing benign from malignant musculoskeletal soft-tissue masses using ADC mapping as a quantitative assessment tool. Patients and methods We evaluated 73 tumors (21 bone tumors and 52 soft-tissue tumors). MR examinations were performed with a 1.5-T system. Diffusion-weighted single-shot EPI images were obtained in all patients. Apparent diffusion coefficients (ADCs) were calculated by using b factors of 0 and 1000 s/mm 2 . ADC value measurements were compared with the histopathological findings. Results The average ADC of benign tumors was 1.86 ± 0.67 × 10 ?3 mm 2 /s, and that of malignant soft-tissue tumors was 0.97 ± 0.35 × 10 ?3 mm 2 /s. ADC value of malignant tumors was significantly lower than that of the benign tumor group ( p 0.0001). The highest ADC value was seen in the case of ganglion cyst (2.8 ± 0.23 × 10 ?3 mm 2 /s) and cystic neurofibroma (2.5 ± 0.04 × 10 ?3 mm 2 /s), and juxta cortical enchondroma (2.65 ± 0.36 × 10 ?3 mm 2 /s) while the lowest one was seen in aggressive fibromatosis (0.37 ± 0.05 × 10 ?3 mm 2 /s). For malignant soft-tissue masses, the highest ADC value was seen in mesenchymal chondrosarcoma (2.1 ± 0.32) liposarcoma (intermediate grade) (1.4 ± 0.21) while the lowest ADC value was seen in fibrosarcoma (high grade) (0.78 ± 0.14). Conclusion MR diffusion provides additional information to the routine MRI sequences rendering it an effective non-invasive tool in differentiating between benign and malignant soft-tissue tumors.
机译:目的使用ADC映射作为定量评估工具,评估回波平面DW成像在区分良恶性肌肉骨骼肌肉软组织肿块中的诊断作用。患者和方法我们评估了73个肿瘤(21个骨肿瘤和52个软组织肿瘤)。 MR检查是使用1.5-T系统进行的。所有患者均获得了弥散加权的单次EPI图像。通过使用b因子0和1000 s / mm 2来计算表观扩散系数(ADC)。将ADC值的测量结果与组织病理学结果进行比较。结果良性肿瘤的平均ADC为1.86±0.67×10?3 mm 2 / s,恶性软组织肿瘤的平均ADC为0.97±0.35×10?3 mm 2 / s。恶性肿瘤的ADC值显着低于良性肿瘤组(p <0.0001)。神经节囊肿(2.8±0.23×10?3 mm 2 / s)和囊性神经纤维瘤(2.5±0.04×10?3 mm 2 / s)和近端皮质内生软骨瘤(2.65±0.36)的ADC值最高×10?3 mm 2 / s),而侵袭性纤维瘤病最低(0.37±0.05×10?3 mm 2 / s)。对于恶性软组织肿块,间质软骨肉瘤(2.1±0.32)脂肪肉瘤(中度)(1.4±0.21)的ADC值最高,而纤维肉瘤(高级)的ADC值最低(0.78±0.14)。结论MR扩散为常规MRI序列提供了更多信息,使其成为区分良性和恶性软组织肿瘤的有效非侵入性工具。

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