Ahmet Tuğrul Akkuş

Purpose: This study aimed to compare microflow imaging (MFI) with conventional color Doppler imaging (CDI) for differentiating malignant from non-neoplastic peripheral lung lesions on the basis of vascular grading and vascular morphology.Methods: This retrospective single-center study included 124 patients with pleura-based peripheral lung lesions who underwent thoracic ultrasound between January 2024 and January 2026. Each lesion was examined with B-mode ultrasound, CDI, and MFI during the same session. Vascularity was graded according to the Adler classification, and vascular morphology was assigned to one of five predefined patterns. Histopathological findings or clinical and radiological follow-up served as the reference standard. Receiver operating characteristic curve analysis and multivariable logistic regression were performed.Results: Among the 124 lesions, 77 (62.1%) were malignant and 47 (37.9%) were non-neoplastic. Vascularity scores obtained with both MFI and CDI were significantly higher in malignant lesions than in non-neoplastic lesions (P<0.001). The MFI morphology score achieved the highest diagnostic performance (area under the curve [AUC], 0.933; 95% confidence interval [CI], 0.888 to 0.979), followed by the MFI Adler score (AUC, 0.899), CDI Adler score (AUC, 0.847), and CDI morphology score (AUC, 0.828). At a cutoff of ≥3, the MFI morphology score yielded 94% sensitivity and 83% specificity. In multivariable analysis, only the MFI morphology score remained an independent predictor of malignancy (odds ratio, 6.13; 95% CI, 2.02 to 18.56; P=0.001).Conclusion: MFI, particularly vascular morphology assessment, showed better diagnostic performance than CDI for differentiating malignant from non-neoplastic peripheral lung lesions and may improve routine thoracic ultrasound evaluation.

Vertebral Artery Doppler Reference Values in Healthy Turkish Adults: Influence of Age, Sex, and BMI - Archives of Basic and Clinical Research

Superior and Inferior Mesenteric Arterial Variations on CT Angiography: Prevalence, Patterns, and Demographic Associations - Advanced Radiology and Imaging

Background: Differentiating ovarian endometriomas from hemorrhagic cysts matters because their management differs. Purpose: To evaluate whether a multiparametric magnetic resonance imaging (MRI) approach improves differentiation of endometriomas from hemorrhagic cysts over conventional subjective assessment. Material and Methods: In total, 83 hemorrhagic cystic ovarian lesions (45 endometriomas, 38 hemorrhagic cysts) on 1.5-T pelvic MRI were retrospectively evaluated by two independent blinded radiologists (with 20 and 7 years of experience in abdominopelvic and gynecological MRI) for quantitative T1 and T2 signal intensities (quantitative shading), intralesional and perilesional apparent diffusion coefficient (ADC), lesion size, and the T2 shading and dark-spot signs. ROC analysis, logistic regression, and inter-/intra-observer agreement were assessed, and models were compared with the DeLong test. Results: Endometriomas were larger (55.0 vs. 40.7 mm; P = 0.007), had lower intralesional ADC (1.054 vs. 1.563 ×10 ⁻³ mm ² /s; P = 0.002), and a greater T1–T2 signal difference ( P < 0.001), which had the highest single-parameter accuracy (AUC = 0.799). There was no statistically significant difference in the T2 shadowing sign between the groups (91.1% vs. 81.6%; P = 0.342). The T2 dark-spot sign was specific (100%) but insensitive (24.4%). Perilesional ADC did not differ ( P = 0.112) and showed poor inter-observer agreement (ICC = 0.064). A multiparametric model (quantitative shading, intralesional ADC, lesion size) outperformed conventional MRI (AUC = 0.894 vs. 0.670; DeLong P < 0.001), increasing sensitivity from 24.4% to 88.9% at comparable specificity. Conclusion: A multiparametric model combining quantitative shading, intralesional ADC and lesion size significantly improved differentiation over conventional MRI, whereas perilesional ADC showed no diagnostic utility at 1.5 T.

Ependimomlar, spinal kord veya ventrikül sisteminin ependimal hücrelerinden köken alan intramedüller tümörlerdir. Genç erişkinlerde sık görülen bu lezyonlar, MRG’de T2 hiperintens, postkontrast T1 görüntülerde belirgin kontrastlanan kitle şeklinde izlenir. Peritümöral kistler ve ödem sıklıkla eşlik eder.

Medulloblastomlar çocukluk çağının en sık görülen malign posterior fossa tümörleridir. Genellikle orta hatta yerleşir ve dördüncü ventrikülü tıkayarak hidrosefaliye neden olabilir. MRG’de yoğun kontrastlanan, difüzyon kısıtlılığı gösteren solid kitle şeklinde izlenir. Tedavi cerrahi, radyoterapi ve kemoterapi kombinasyonudur.

Background: Bruxism is a common parafunctional activity that may alter the structural and mechanical properties of the masseter muscle. Shear wave elastography (SWE) provides a noninvasive and objective method for evaluating muscle stiffness. Despite increasing interest in SWE, its diagnostic value in bruxism has not been fully established. Methods: This comparative study included 2 groups: a bruxism group and a healthy control group. Bruxism was diagnosed in accordance with the diagnostic criteria for temporomandibular disorders (DC/TMD) by a dentist with 20 years of clinical experience. The control group comprised volunteers without bruxism, confirmed using the same diagnostic criteria. All participants underwent B-mode ultrasonography (US) in the supine position with their heads tilted to the opposite side at rest. US was used to assess the length and thickness of the masseter muscles, while SWE was used to measure muscle stiffness, reported in kilopascals (kPa). Results: Masseter muscle length was significantly shorter and SWE values were significantly higher in patients with bruxism compared to controls ( P < .05). A cutoff SWE value of 13.55 kPa was identified, yielding a sensitivity of 86.0% and specificity of 87.5% for the diagnosis of bruxism. The sample size in this study was larger than in previous SWE-based bruxism studies, enhancing the reliability of these findings. Conclusion: SWE demonstrates high diagnostic performance in identifying bruxism and may serve as a valuable objective tool in clinical practice. A threshold of 13.55 kPa can aid in distinguishing affected individuals with high sensitivity and specificity.