| Autor: |
Su, Chun‐Qiu, Zhang, Xuan, Pan, Ting, Chen, Xiao‐Tian, Chen, Wen, Duan, Shao‐Feng, Ji, Jing, Hu, Wei‐Xing, Lu, Shan‐Shan, Hong, Xun‐Ning, Su, Chun-Qiu, Chen, Xiao-Tian, Duan, Shao-Feng, Hu, Wei-Xing, Lu, Shan-Shan, Hong, Xun-Ning |
| Předmět: |
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| Zdroj: |
Journal of Magnetic Resonance Imaging; May2020, Vol. 51 Issue 5, p1507-1513, 7p |
| Abstrakt: |
Background: Preoperative evaluation of the consistency of pituitary macroadenomas is important for neurosurgeons to prepare the surgical plan.Purpose: To evaluate the diagnostic performance of texture analysis (TA) of diffusion-weighted imaging (DWI) at a standard b-value (b = 1000 s/mm2 ) and a high b-value (b = 2000 s/mm2 ) for their ability to assess the tumor consistency of pituitary macroadenomas.Study Type: Retrospective.Population/subjects: Fifty patients with histologically confirmed pituitary macroadenomas were classified as soft (n = 37) or hard (n = 13) types.Field Strength/sequence: Coronal T2 -weighted imaging (T2 WI), Readout Segmentation of Long Variable Echo-trains (RESOLVE) DWI at b = 1000 s/mm2 and b = 2000 s/mm2 were acquired with 3.0T MRI.Assessment: The corresponding apparent diffusion coefficient (ADC) maps (ADC1000 and ADC2000 ) were registered to T2 WI. Regions of interest (ROIs) were manually drawn along the solid part of the tumor from the coregistered T2 WI-ADC images. The texture parameters from T2 WI, ADC1000 , and ADC2000 were acquired.Statistical Tests: The texture parameters were compared between the two types by using unpaired Student's t-test. Receiver operating characteristic (ROC) curves and logistic regression analyses were used to assess their diagnostic performance.Results: Significant differences in TA parameters of ADC1000 and ADC2000 were observed between soft and hard types (P < 0.05 for all), whereas the TA of T2 WI resulted in no significant difference (P > 0.05 for all). TA of ADC2000 provided a superior diagnostic performance compared with that of ADC1000 (P = 0.038). A combination of mean value and entropy of ADC2000 yielded an AUC, a sensitivity, and a specificity of 0.911, 78.4% and 92.3%, respectively.Data Conclusion: TA of ADC values were useful for assessing the tumor consistency of pituitary macroadenomas. ADC2000 may facilitate better type discrimination.Level Of Evidence: 3 Technical Efficacy Stage: 2 J. Magn. Reson. Imaging 2020;51:1507-1513. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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