Loukas G Astrakas


Affiliation: University of Ioannina
Country: Greece


  1. Tsili A, Ntorkou A, Baltogiannis D, Goussia A, Astrakas L, Malamou Mitsi V, et al. The role of apparent diffusion coefficient values in detecting testicular intraepithelial neoplasia: preliminary results. Eur J Radiol. 2015;84:828-33 pubmed publisher
    ..001), groups 2 and 1 (P<0.001), but not between groups 3 and 1 (P=0.87). Based on our preliminary results, ADC values do not provide a reliable differentiation between TIN and testicular carcinoma or normal testicular parenchyma. ..
  2. Tsili A, Sylakos A, Ntorkou A, Stavrou S, Astrakas L, Sofikitis N, et al. Apparent diffusion coefficient values and dynamic contrast enhancement patterns in differentiating seminomas from nonseminomatous testicular neoplasms. Eur J Radiol. 2015;84:1219-26 pubmed publisher
    ..No differences between the two groups were observed for peak enhancement (P=0.18), time to peak (P=0.63) wash-in rate (P=0.32) and wash-out rate (P=0.18). ADC values may be used to preoperatively differentiate seminomas from NSGCTs. ..
  3. Tsili A, Ntorkou A, Baltogiannis D, Sylakos A, Stavrou S, Astrakas L, et al. Magnetization transfer imaging of normal and abnormal testis: preliminary results. Eur Radiol. 2016;26:613-21 pubmed publisher
    ..MTR might be helpful in the diagnostic work-up of testicular lesions. MTR of normal testes shows age-related changes. Testicular carcinomas have high MTR values. MTR may be useful in the diagnostic work-up of testicular lesions. ..
  4. Astrakas L, Argyropoulou M. Key concepts in MR spectroscopy and practical approaches to gaining biochemical information in children. Pediatr Radiol. 2016;46:941-51 pubmed publisher
    ..We review major brain metabolites and discuss MRS dependence on age, location, echo time and field strength. ..
  5. Tsili A, Ntorkou A, Astrakas L, Xydis V, Tsampalas S, Sofikitis N, et al. Diffusion-weighted magnetic resonance imaging in the characterization of testicular germ cell neoplasms: Effect of ROI methods on apparent diffusion coefficient values and interobserver variability. Eur J Radiol. 2017;89:1-6 pubmed publisher
    ..Multiple, small round ROIs and round ROI proved the more accurate methods for ADC measurement in the characterization of TGCNs and in the differentiation between seminomas and NSGCNs, respectively. ..
  6. Tsili A, Ntorkou A, Astrakas L, Boukali E, Giannakis D, Maliakas V, et al. Magnetic resonance diffusion tensor imaging of the testis: Preliminary observations. Eur J Radiol. 2017;95:265-270 pubmed publisher
    ..Both ADC and FA significantly differ between testicular lesions and normal testis, although FA did not show an incremental diagnostic value compared to ADC in lesion differentiation. ..