Yazar "Koroglu, Reyhan" seçeneğine göre listele

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    Is it possible to achieve more accurate mediastinal nodal radiotherapy planning for NSCLC with PET/CT?
    (Pakistan Medical Assoc, 2020) Simseki, Fikri Selcuk; Koroglu, Reyhan; Elmali, Ferhan; Comak, Aylin; Ulutas, Hakki; Balci, Tansel Ansal; Asik, Muhammed
    Objective: To assess whether more accurate mediastinal lymph nodes radiotherapy can be performed with fluorodeoxyglucose positron emission tomography / comuted tomography. Methods: The retrospective study was conducted at Inonu University Medical Faculty, Malatya, Turkey, and Afyon Kocatepe University Medical Faculty, Afyon, Turkey, and comprised record of patients histopathologically diagnosed with non-small cell lung carcinoma and who underwent fluorodeoxyglucose positron emission tomography / computed tomography between January 2013 and December 2016. Surgery and pathology reports of the patients were reviewed. Histopathologically proven malignant and benign lymph nodes were re-identified with fluorodeoxyglucose positron emission tomography / computed tomography imaging. Anatomical and metabolic parameters of lymph nodes were re-assessed by specialists and compared with histopathology reports. Maximum standardised uptake values were used to assess sensitivity, specificity, positive predictive value, and negative predictive values. SPSS 22 was used for data analysis. Results: The study included 144 mediastinal lymph nodes related to 42 patients who had a mean age of 62.4 +/- 9.8 years (range: 41-79 years). In terms of subtypes of the primary squamous cell carcinoma was found in 24(57.2%) patients, adenocarcinoma in 12(27.5%), and other subtypes in 6(15.3%) patients. Of the 144 lymph nodes, 48(33.3%) were metastatic. Sensitivity, specificity, positive predictive value, and negative predictive value were 92.8%, 64.3%, 56.9%, and 94.7%, respectively when maximum standardised uptake value >2.5 was used as the malignancy criterion. When lymph node maximum standardised uptake value / liver standardised uptake value-mean >1.69 was used as the criterion, the sensitivity, specificity, positive predictive value, and negative predictive value were 95.83%, 91.67%, 85.2%, and 97.8%, respectively. When the same values with lymph node >8mm was used as the criterion, the four resultant values were 89.6%, 93.8%, 87.8%, and 94.7%, respectively. When lymph node was replaced with mean attenuation >35 as the criterion, the consequent values were 79.2%, 93.8%, 86.4%, and 90.0%, respectively. Conclusion: Lymph node maximum standardised uptake value / liver standardised uptake value-mean >1.69 was associated with higher negative predictive value and more useful positive predictive value compared to maximum standardised uptake value >2.5. When this parameter was used along with short axis or mean attenuation value, there were no significant increase in positive predictive value, but there was a decrease in negative predictive value.
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    PET-BT Use in Evaluation of Metastatic Ovarian Cancers
    (Duzce Univ, 2012) Koroglu, Reyhan
    Many patients with ovarian cancer are at high risk of recurrence especially in the 2 years following fist-line therapy. CA 125 serum levels measurement associated to computed tomography (BT), ultrasound (US) and magnetic resonance imaging (MRI) are currently used during follow-up to detect recurrent disease. However, CT is the most effective and useful tool at all of these conventional methods. Unfortunately, in a relevant percentage of cases all of these traditional imaging techniques provide a significant number of doubtful/equivocal results or turn out negative even in presence of elevated Ca 125 levels. Noninvasive diagnosis of early recurrence of ovarian cancer is challenging due to the small size of peritoneal metastases. Occasionally small-volume disease may not be evident at anatomic imaging in patients with high CA 125 levels. Positron emission tomography (PET) can help of these patients to identify patients with recurrent tumor. Nevertheless, lesion localization for possible surgery is difficult with PET alone. Combined functional-anatomic imaging with fused PET and computed tomographic (CT) scans is practicable and may upgrade disease detection by increasing radiologic sensitivity and specificity.
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    Report of seven children with hepatopulmonary syndrome
    (Aves, 2014) Erge, Duygu; Selimoglu, Mukadder Ayse; Karakurt, Cemsit; Karabiber, Hamza; Elkiran, Ozlem; Catal, Ferat; Koroglu, Reyhan
    Hepatopulmonary syndrome is an important pulmonary vascular complication of liver disease. Its diagnosis is based on the presence of hypoxaemia and the demonstration of intrapulmonary shunting by contrast-enhanced echocardiography or perfusion lung scanning. Awareness of this condition is critical to improve the outcomes of patients with chronic liver disease and/or portal hypertension because hepatopulmonary syndrome receives additional priority on the waiting list for transplantation. A non-invasive measurement of the blood oxygen saturation with pulse oximetry is recommended as a screening tool for this syndrome. The aim of this report was to present clinical and laboratory findings and follow-up of seven paediatric patients who were diagnosed with HPS at our centre.