Yazar "Cimilli, Tan" seçeneğine göre listele

Listeleniyor 1 - 4 / 4
  • Küçük Resim Yok
    Öğe
    Diffusion-weighted MRI of urinary bladder and prostate cancers
    (Aves, 2009) Kılıçkesmez, Özgür; Cimilli, Tan; İnci, Ercan; Kayhan, Arda; Bayramoğlu, Sibel; Taşdelen, Neslihan; Gürmen, Nevzat
    PURPOSE The purpose of this study was to evaluate the feasibility of diffusion-weighted imaging in the diagnosis of the urinary bladder and prostate carcinomas. The apparent diffusion coefficient (ADC) values of the malignant and normal tissues were correlated. MATERIALS AND METHODS A total of 23 patients with 14 urinary bladder carcinomas and 9 prostate carcinomas, and 50 healthy controls with normal ultrasonographic urinary bladder and prostate gland imaging findings were enrolled in the study. The ADC values were reported as the mean standard deviation. Student's t test was performed to compare the ADC values of the normal and pathological tissues. Diffusion-weighted imaging (DWI) was performed with b factors of 0, 500, and 1000 s/mm(2), and the ADC values of the normal tissues and lesions were calculated. RESULTS The mean ADC value of the urinary bladder wall of the control group and bladder carcinomas were (2.08 +/- 0.22 x 10(-3) mm(2)/s) and (0.94 +/- 0.18 x 10(-3) mm(2)/s), respectively. In addition, the ADC values of the normal peripheral (2.07 +/- 0.33 x 10(-3) mm(2)/s), transitional zones (1.46 +/- 0.23 x 10(-3) mm(2)/s) of the prostate, seminal vesicles (2.13 +/- 0.13 x 10(-3) mm(2)/s) and the prostate carcinomas (1.06 +/- 0.17 x 10(-3) mm(2)/s) were calculated. The comparison of mean ADC values of the peripheral-transitional zones of the prostate, normal bladder wall-bladder carcinomas, and peripheral zone prostate carcinomas were statistically significant (P < 0.01). CONCLUSION The present study demonstrated that ADC measurement has a potential ability to differentiate carcinomas from normal bladder wall and prostate gland.
  • Küçük Resim
    Öğe
    Do the manipulations in pediatric inguinal hernia operations affect the vascularization of testes?
    (W B Saunders Co-Elsevier Inc, 2009) Bakırtaş Palabıyık, Figen; Cimilli, Tan; Kayhan, Arda; Toksoy, Nurseli
    Purpose: The aim of this study is to evaluate the effect of manipulations performed in inguinal hernia operations on testicular perfusion, in pediatric age group using Doppler ultrasonography (DUS). Methods: In this prospective clinical trial, 51 boys who underwent elective inguinal hernia repair were examined before the operation and in early-late postoperative periods. Blood flow indices of centripetal and capsular arteries including peak systolic velocity (PSV), end-diastolic velocity (EDV), and resistivity index (RI) were examined by DUS. Results: There was a statistically significant increase in early postoperative PSV and R1 values compared with preoperative findings. These values turned to normal in late postoperative period. The increase in early and decrease in late postoperative EDV values were not statistically significant compared to preoperative findings. Conclusions: The surgical manipulations performed in inguinal hernia operations in children cause transient changes in testes vascularization in early postoperative period but turns to normal late postoperatively. (C) 2009 Elsevier Inc. All rights reserved.
  • Küçük Resim
    Öğe
    Multidetector CT angiography versus arterial duplex USG in diagnosis of mild lower extremity peripheral arterial disease: Is multidetector CT a valuable screening tool?
    (Elsevier Ireland Ltd, 2012) Kayhan, Arda; Palabiyik, Figen; Serinsoz, Serdar; Kiris, Adem; Bayramoğlu, Sibel; Williams, Joshua T. B.; Cimilli, Tan
    Objective: To prospectively compare the efficacy of 40-row multidetector computed tomography angiography (MDCTA) and duplex ultrasonography (DUS) to diagnose mild peripheral arterial occlusive disease (PAOD) in lower leg and to search whether MDCTA can be used as a screening tool. Methods: Forty-three patients with intermittent claudication and leg pain, diagnosed as mild PAOD, had undergone DUS and MDCTA of lower limb. The arteries of lower leg were initially scanned by DUS, followed by MDCTA. Both modalities were compared for detecting the obstructed and stenotic segments. Results: A total of 774 vessel segments were imaged by both modalities. When all arteries were considered, MDCTA detected obstructed or stenotic lesions in 16.8% of arteries, versus 11.1% compared to DUS. When suprapopliteal arteries alone were considered, MDCTA detected lesions in 15.0% of arteries, versus 11.0% with DUS. When infrapopliteal arteries only were considered, MDCTA detected lesions in 19.6% of arteries, versus 11.3% with DUS. MDCTA showed 5.7% (95% CI: [3.5%, 7.9%]) more lesions than DUS when all arteries were considered together, 8.3% (95% CI: [4.6%, 12.0%]) more lesions when only the infrapopliteal arteries were compared, and 4.0% (95% CI: [1.3%, 6.8%]) more lesions when only suprapopliteal arteries were compared (p < 0.01 for all comparisons). Conclusion: 40-row MDCTA may be used as a screening tool in patients with mild lower extremity PAOD as it is a non-invasive and more accurate modality when compared to DUS. (C) 2011 Elsevier Ireland Ltd. All rights reserved.
  • Küçük Resim
    Öğe
    Respiratory gated multidetector computed tomography: Applicable for diagnostic abdominal imaging?
    (Elsevier Ireland Ltd, 2010) Cimilli, Tan; Bayramoğlu, Sibel; Aksoy, Sema; Kılıçkesmez, Özgür; Kayhan, Arda; Alibek, Sedat
    Purpose: To evaluate the ability and accuracy of a respiratory gated technique used with contrast enhanced MDCT of the upper abdomen with focus on diagnostic image quality and depiction of organs and major vessels. Materials and methods: Forty-five adult patients who were referred to our institution for follow-up dynamic contrast enhanced abdominal CT imaging were included in this study. Respiratory gated CT scans were performed with the use of a dedicated hardware. A multiphasic CT scan was performed for each patient Respiratory gated images were obtained between early arterial and portal venous phases during free breathing. Images of respiratory gated (RG) and breathhold (BH) phases were compared qualitatively and quantitatively by two radiologists. Definitive statistical methods were used for evaluating the scoring data, while Mann Whitney U test was used for comparison. Statistical significance was accepted for p values <0.05. Results: Statistical significant difference was found for comparison of scores regarding luminal opacification and contoural integrity of intrahepatic vascular structures with scores of RG scans rated poor to moderate (e.g. 2.86 +/- 1.07 for luminal opacification of intrahepatic portal veins as well as border detectability) in comparison to scores of BH scans rated good to excellent (e.g. 1.37 +/- 1.31 for lumina] opacification, 1.35 +/- 1.28 for border detectability of intrahepatic portal veins, p < 0.001). Furthermore, statistical significant differences were found for general image noise levels (p < 0.001). Conclusions: Further technical advances of RG technique could enable routine use of this technique for selected patient groups. (C) 2008 Elsevier Ireland Ltd. All rights reserved.