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    Abdomen çok kesitli bilgisayarlı tomografi ile saptanan kolonun anatomik varyasyonları
    (Dicle Üniversitesi Tıp Fakültesi, 2012) Gümüş, Hatice; Kuday, Suzan; Hamidi, Cihad; Özdemir, Muhammed Sıddık; Önder, Hakan; Tekbaş, Güven; Bilici, Aslan
    Giriş: Bu çalışmanın amacı kolonun anatomik varyasyonlarının sıklığını ve klinik önemini belirlemektir. Gereç ve yöntem: Ocak 2010-Eylül 2011 tarihleri arasında, radyoloji bölümünde, farklı nedenlerden dolayı abdomen çok kesitli bilgisayarlı tomografi (ÇKBT) çekilmiş, 1300 hasta retrospektif olarak, kolonun anatomik varyasyonları açısından incelendi. Bulgular: ÇKBT çekilmiş 1300 hastanın, 640’ı kadın ve 660’ı erkek idi. Ortalama yaş 43,02 yıl (2-92) idi. Kolon varyasyonlarının sayısı: 34 (% 2,6) anterior, 14 (% 0,9) posterior hepatodiyaframatik, 40 (% 3) sağ böbrek-psoas interpozisyonu, 3 (% 0,2) sol böbrek-psoas interpozisyonu, 4 (% 0,3) sağ retrorenal, 16 (% 1,2) sol retrorenal, 2 (%0,2) bilateral, 10 (% 0,8) pankreatikogastrik, 5 (% 0,4) retosplenik kolon ve 64 (% 4,9) yüksek yerleşimli çekum. Sonuç: Kolonun anatomik varyasyonlarının bilinmesi cerrahi ve girişimsel radyolojik işlemlerde önemlidir. ÇKBT bu varyasyonların ayrıntılı bir şekilde gösterilmesine olanak sağlamaktadır.
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    Acoustic radiation force impulse (ARFI) elastography for detection of renal damage in children
    (Springer, 2015) Goya, Cemil; Hamidi, Cihad; Ece, Aydin; Okur, Mehmet Hanifi; Tasdemir, Bekir; Cetincakmak, Mehmet Guli; Hattapoglu, Salih
    Acoustic radiation force impulse (ARFI) imaging is a promising method for noninvasive evaluation of the renal parenchyma. To investigate the contribution of ARFI quantitative US elastography for the detection of renal damage in kidneys with and without vesicoureteral reflux (VUR). One hundred seventy-six kidneys of 88 children (46 male, 42 female) who had been referred for voiding cystourethrography and 20 healthy controls were prospectively investigated. Patients were assessed according to severity of renal damage on dimercaptosuccinic acid (DMSA) scintigraphy. Ninety-eight age- and gender-matched healthy children constituted the control group. Quantitative shear wave velocity (SWV) measurements were performed in the upper and lower poles and in the interpolar region of each kidney. DMSA scintigraphy was performed in 62 children (124 kidneys). Comparisons of SWV values of kidneys with and without renal damage and/or VUR were done. Significantly higher SWV values were found in non-damaged kidneys. Severely damaged kidneys had the lowest SWV values (P < 0.001). High-grade (grade V-IV) refluxing kidneys had the lowest SWV values, while non-refluxing kidneys had the highest values (P < 0.05). Significant negative correlations were found between the mean quantitative US elastography values and DMSA scarring score (r = -0.788, P < 0.001) and VUR grade (r = -0.634, P < 0.001). SWV values of the control kidneys were significantly higher than those of damaged kidneys (P < 0.05). Our findings suggest decreasing SWV of renal units with increasing grades of vesicoureteric reflux, increasing DMSA-assessed renal damage and decreasing DMSA-assessed differential function.
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    Acoustic Radiation Force Impulse (ARFI) imaging for the distinction between benign and malignant thyroid nodules
    (Springer-Verlag Italia Srl, 2015) Hamidi, Cihad; Goya, Cemil; Hattapoglu, Salih; Uslukaya, Omer; Teke, Memik; Durmaz, Mehmet Sedat; Yavuz, Mehmet Siddik
    The aim of the present study was to evaluate thyroid nodules using virtual touch quantification (VTQ) of force impulse acoustic radiation (ARFI) imaging and to investigate a cutoff value for the differentiation of malignant thyroid nodules. Ninety-five patients with quantitatively-assessed (VTQ) thyroid nodules were evaluated with ARFI imaging in this prospective study. ARFI imaging with VTQ was performed only on the nodules which were expected to undergo fine-needle aspiration biopsy (FNAB). All of the thyroid lesions were examined histopathologically. The mean shear wave velocity (SWV) value of the malignant nodules (3.18 +/- A 0.39 m/s) was higher than that of the benign nodules (2.11 +/- A 0.53 m/s). There was a statistically significant difference between the mean SWV values of benign and malignant nodules (p < 0.001). A SWV cutoff value of greater than 2.66 m/s yielded sensitivity and specificity values of 100 and 82.3 %, respectively, for diagnosis of malignant nodules. VTQ of ARFI imaging has high sensitivity and specificity for discriminating between benign and malignant thyroid nodules and may positively contribute to clinical evaluation of these nodules.
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    Acoustic Radiation Force Impulse Imaging for Evaluation of Renal Parenchyma Elasticity in Diabetic Nephropathy
    (Amer Roentgen Ray Soc, 2015) Goya, Cemil; Kilinc, Faruk; Hamidi, Cihad; Yavuz, Alpaslan; Yildirim, Yasar; Cetincakmak, Mehmet Guli; Hattapoglu, Salih
    OBJECTIVE. The goal of this study is to evaluate the changes in the elasticity of the renal parenchyma in diabetic nephropathy using acoustic radiation force impulse imaging. SUBJECTS AND METHODS. The study included 281 healthy volunteers and 114 patients with diabetic nephropathy. In healthy volunteers, the kidney elasticity was assessed quantitatively by measuring the shear-wave velocity using acoustic radiation force impulse imaging based on age, body mass index, and sex. The changes in the renal elasticity were compared between the different stages of diabetic nephropathy and the healthy control group. RESULTS. In healthy volunteers, there was a statistically significant correlation between the shear-wave velocity values and age and sex. The shear-wave velocity values for the kidneys were 2.87, 3.14, 2.95, 2.68, and 2.55 m/s in patients with stage 1, 2, 3, 4, and 5 diabetic nephropathy, respectively, compared with 2.35 m/s for healthy control subjects. Acoustic radiation force impulse imaging was able to distinguish between the different diabetic nephropathy stages (except for stage 5) in the kidneys. The threshold value for predicting diabetic nephropathy was 2.43 m/s (sensitivity, 84.1%; specificity, 67.3%; positive predictive value, 93.1%; negative predictive value 50.8%; accuracy, 72.1%; positive likelihood ratio, 2.5; and negative likelihood ratio, 0.23). CONCLUSION. Acoustic radiation force impulse imaging could be used for the evaluation of the renal elasticity changes that are due to secondary structural and functional changes in diabetic nephropathy.
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    Adrenal bez kalınlığının multi-dedektörlü bilgisayarlı tomografi ile değerlendirilmesi
    (Modestum Publishing Ltd., 2012) Hamidi, Cihad; Göya, Cemil; Hattapoğlu, Salih; Çetinçakmak, Mehmet Güli; Teke, Memik; Dusak, Abdurrahim; Kuday, Suzan
    Amaç: Bu çalışmanın amacı anatomik detayın daha iyi değerlendirildiği multi-dedektörlü bilgisayarlı tomografi ile adrenal bez boyutlarını ve her iki taraftaki adrenal bezler arasında kalınlık farkının olup olmadığını araştırmaktır. Gereç ve yöntem: Adrenal bez patolojisi bulunmayan, adrenal bez dışı kitlesi olmayan 100 hasta bilateral adrenal bez kalınlıkları açısından 16 ve 64 dedektörlü bilgisayarlı tomografi ile retrospektif olarak incelendi. Bulgular: Ölçümler sonucunda her iki adrenal bez ortalama medial ve lateral bacak kalınlıkları arasında istatistiksel olarak anlamlı farklılık saptandı (p< 0.001, p=0.035). Her iki adrenal bez gövdeleri arasında ise istatistiksel olarak anlamlı farklılık saptanmadı (p=0.611). Sonuç: Sol adrenal bez sağa nazaran varyatif olarak kalın izlenmiş olup, adrenal bez kalınlıkları standardizasyonu açısından daha geniş çalışmalara ihtiyaç duyulmaktadır.
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    The association between varicocele and ankylosing spondylitis via color duplex sonography
    (Springer, 2014) Hamidi, Cihad; Batmaz, Ibrahim; Gumus, Hatice; Penbegül, Necmettin; Cetincakmak, Mehmet Guli; Tahtasiz, Mehmet; Bilici, Aslan
    Objective To evaluate the relationship between varicocele and ankylosing spondylitis (AS) via color duplex sonography (CDS). Methods Thirty male patients (age range 18-40 years, mean age 30.27 years) with AS and 30 male healthy controls (age range 20-36 years, mean age 27.23 years) were evaluated for varicocele using CDS. Results Vein diameter in right and left pampiniform plexus (PP) in the AS group was significantly higher than in the control group (p < 0.001 and p = 0.003, respectively). The incidence of varicocele was observed as 33.3 % in the AS group and 10 % in the control group. However, the difference was statistically significant (p = 0.028). The rate of right, left, and bilateral varicocele was 3.3 % (1 patient), 23.3 % (7 patients), and 6.6 % (2 patients), respectively, in the AS group, versus 0, 10, and 0 % in the control group (p = 1.000, p = 0.166, and p = 0.492, respectively). Conclusions The incidence of varicocele in AS patients is higher than in control subjects, and the difference is statistically significant. Therefore, varicocele must be taken into consideration and investigated in patients with AS.
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    Combination of Virtual Touch Tissue Imaging and Virtual Touch Tissue Quantification for Differential Diagnosis of Breast Lesions
    (Amer Inst Ultrasound Medicine, 2015) Teke, Memik; Goya, Cemil; Teke, Fatma; Uslukaya, Omer; Hamidi, Cihad; Cetincakmak, Mehmet Guli; Hattapoglu, Salih
    Objectives-Breast cancer is the second leading cause of death from cancer in women, and early detection is the key to successful treatment. Unfortunately, even with technological advances, the specificity of imaging modalities is still low. Therefore, we evaluated the value of a newly developed noninvasive technique, acoustic radiation force impulse imaging, for differentiating benign versus malignant breast lesions. Methods We prospectively examined 141 breast lesions in 122 patients. All lesions were classified according to the American College of Radiology Breast Imaging Reporting and Data System (BI-RADS) for mammography, BI-RADS for sonography, and Virtual Touch tissue imaging (VTI; Siemens Medical Solutions, Mountain View, CA) pattern. Internal and marginal shear wave velocity (SWV) values for the lesions were noted. The sensitivity, specificity, accuracy, and positive and negative predictive values for VTI and Virtual Touch tissue quantification (VTQ Siemens Medical Solutions) were calculated. Results The marginal SWV values were statistically higher in malignant lesions (mean +/- SD, 5.41 +/- 1.37 m/s) than benign lesions (2.91 +/- 0.88 m/s; P < .001). When the SWV cutoff level was set at 4.07 m/s, and the higher of the internal and marginal values was adopted, the combination of VTI and VTQ showed 95.1% sensitivity, 99.0% specificity, and 97.8% accuracy. Conclusions Breast Imaging Reporting and Data System category 4 lesions are the main focus of research for early detection of breast cancer. Unfortunately, BI-RADS category 4 assessment covers a-wide range of likelihood of malignancy (2%-95%). This wide range reflects the necessity for a more specific imaging modality. The combination of. VTI and VTQ could increase the diagnostic performance of conventional sonography.
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    Comparison of thyroid scintigraphy and ARFI-elastography in autoimmune thyroid diseases
    (MediHealth Academy Yayıncılık, 2022) Sezgin, İlhan; Taşdemir, Bekir; Kılınç, Faruk; Hamidi, Cihad; Çoraplı, Mahmut
    Aim: To compare the ARFI elastographic and scintigraphic quantitative data obtained from thyroid gland and to evaluate diagnostic value of ARFI elastographic measurements in autoimmune thyroid diseases. Material and Method: In the study a total of 61 patients (41 women, 20 men) including 24 Graves’ disease, 15 Hashimoto disease and 22 control subjects. The patients mean age was 33.9±10.9 years. Patients with thyroid nodules were not included in the study. Thyroid uptake was performed with Tc 99m pertechnetate and the elastosonography score of the thyroid gland was determined with ARFI. Findings of both disease groups were statistically compared with each other and control group Results: For thyroid uptake test; a statistically significant difference was found between two disease (p < 0.001) and between each disease and control group (p < 0.001 for Hashimoto, p <0.001 for Graves). However, for ARFI method; a statistically significant difference was not found between two disease (p=0.336) and between each disease and control group (p=0.14 for Hashimoto, p=0.08 for Graves). Conclusion: Thyroid scan and thyroid uptake measurements are extremely valuable in differential diagnosis of autoimmune thyroid diseases and ARFI elastosonographic measurements don’t seem to replace scintigraphic datas.
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    Diagnosis of Bride Ileus By Multidetector CT andSurgical Correlation
    (2014) Oğuz, Abdullah; Hamidi, Cihad; Yavuz, Alparslan; Çetinçakmak, Mehmet Güli; Teke, Memik; Göya, Cemil; Hattapoğlu, Salih
    Amaç: Amacımız brid ileus ön tanılı hastaların cerrahi bilgileri ve patoloji sonuçları ışığında çok kesitli bilgisayarlı tomografi bulgularını retrospektif olarak değerlendirmektir. Yöntem: Çalışmamıza Ocak 2010 ve Ocak 2014 dönemleri arasında genel cerrahi servisine başvurmuş ve operasyon sonrasında brid ileus kesin tanısı alan yaşları 13-87 arasında değişen 35'i kadın, 30'u erkek toplam 65 olgu dâhil edildi. Hastalarımızın tüm abdomen BT çekimleri 64 kesitli çok kesitli BT cihazıyla; ksifoid proçesten başlayarak simfizis pubise kadar inguinal kanal orifislerini de içine alacak şekilde nefes tutturularak yapıldı. Radyolojik bulgular cerrahi ve patoloji verileriyle beraber istatistiksel olarak karşılaştırıldı. Bulgular: Brid ileusu tesbit etmede çok kesitli bilgisayarlı tomografi'nin sensitivitesi %91, spesifitesi 44 olarak saptandı. Vakalarımızın %72'sinde ince barsak tipi, %28'inde ise kalın barsak tipi obstrüksiyon saptandı. İleuslu olgularımıza eşlik eden mezenterik kirlenme, batında serbest mayi, "inci dizisi" bulgusu ve geçiş zonu ile barsak obstrüksiyonu arasında istatistiksel olarak anlamlı ilişki saptandı (p<0.05). Sonuç: Çok kesitli bilgisayarlı tomografi brid ileuslu hastalarda obstrüksiyonun varlığı, seviyesi ve ikincil olarak oluşan bulguların değerlendirilmesinde etkili görüntüleme yöntemidir.
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    The diagnostic efficacy of low-dose cervical and thoracic CT in multiple trauma patients
    (Dicle Üniversitesi Tıp Fakültesi, 2013) Göya, Cemil; Yavuz, Alpaslan; Hamidi, Cihad; Andiç, Çağatay; Çetinçakmak, Mehmet Guli; Teke, Memik; Özkaynak, Can
    Objective: The aim of this study was to evaluate the initial diagnostic efficacy of low-dose computed tomography (CT) in multi-trauma patients. Methods: 74 patients (44 male, 30 female; average age: 36.9 years) accepted to the emergency unit with the reason of multiple trauma which is included in this study. Cervical and thoracic injury sites were initially evaluated with portable X-Ray and low-dose CT. The Patients’ progress, surgical findings and additional radiologic examination results were recorded until the patients were discharged. Results: The sensitivity and specificity of X-Ray graphies were 50% and 95% for thoracic traumatic pathologies; 0-40% and 95-100% for cervical injuries respectively. CT examination sensitivity and specificity values were 95-100% and 80-100% for thoracic injuries; 95-100% and 96-100% for cervical injuries respectively. Conclusion: Low-dose CT examination is more sensitive than X-Ray graphs for the evaluation of cervicothoracic traumatic injuries. We recommend to prefer low-dose CT as an initial radiologic examination for managing cervicothoracic trauma cases because of its higher diagnostic capability than X-Ray graphy.
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    Differential diagnosis of idiopathic granulomatous mastitis and breast cancer using acoustic radiation force impulse imaging
    (Springer Japan Kk, 2017) Teke, Memik; Teke, Fatma; Alan, Bircan; Turkoglu, Ahmet; Hamidi, Cihad; Goya, Cemil; Hattapoglu, Salih
    Purpose Differentiation of idiopathic granulomatous mastitis (IGM) from carcinoma with routine imaging methods, such as ultrasonography (US) and mammography, is difficult. Therefore, we evaluated the value of a newly developed noninvasive technique called acoustic radiation force impulse imaging in differentiating IGM versus malignant lesions in the breast. Methods Four hundred and eighty-six patients, who were referred to us with a presumptive diagnosis of a mass, underwent Virtual Touch tissue imaging (VTI; Siemens) and Virtual Touch tissue quantification (VTQ; Siemens) after conventional gray-scale US. US-guided percutaneous needle biopsy was then performed on 276 lesions with clinically and radiologically suspicious features. Malignant lesions (n = 122) and IGM (n = 48) were included in the final study group. Results There was a statistically significant difference in shear wave velocity marginal and internal values between the IGM and malignant lesions. The median marginal velocity for IGM and malignant lesions was 3.19 m/s (minimum-maximum 2.49-5.82) and 5.05 m/s (minimum-maximum 2.09-8.46), respectively (p < 0.001). The median internal velocity for IGM and malignant lesions was 2.76 m/s (minimum-maximum 1.14-4.12) and 4.79 m/s (minimum-maximum 2.12-8.02), respectively (p < 0.001). Conclusion The combination of VTI and VTQ as a complement to conventional US provides viscoelastic properties of tissues, and thus has the potential to increase the specificity of US.
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    Display with 64-detector MDCT angiography of cerebral vascular variations
    (Springer France, 2013) Hamidi, Cihad; Bukte, Yasar; Hattapoglu, Salih; Ekici, Faysal; Tekbas, Guven; Onder, Hakan; Gumus, Hatice
    The aim of this study was to assess the cerebral variations and observe their frequency in the patients who have undergone angiographies with the state of the art 64-slice multidetector computed tomography (MDCT) angiography technique due to various reasons. 500 patients (253 women, 247 men) who had CT scan in the period of April 2008 to March 2010 at Dicle University Medicine Faculty Hospital Radiology Unit were surveyed in this study. Patients who had CT scan with brain CT angio protocol were evaluated using multiplanar, maximum intensity projection (MIP) and volume rendering (VR) images in work station. 773 variations were totally detected among 500 patients. Variations were categorized as Willis polygon, fenestration and other variations. Frequent variations were detected at Willis polygon and posterior communicating artery (PCOA) hypoplasia was detected as the prevalent variation. In the present study, we have demonstrated that cerebral vascular variations are frequent and that these variations can be detected in a non-invasive manner using the MDCT angiography. The results obtained from our study may serve as preoperative guidelines for the units performing surgical procedures.
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    Distance measurements and origin levels of the coeliac trunk, superior mesenteric artery, and inferior mesenteric artery by multiple-detector computed tomography angiography (Sep, 10.1007/s12565-020-00571-x, 2020)
    (Springer, 2021) Ekingen, Arzu; Hatipoglu, Eyup Savas; Hamidi, Cihad
    In the original publication of the article, the second sentence under the Materials and methods heading should read as We retrospectively reviewed images of 261 (115 female, 146 male) patients obtained by MDCTA technique between 2016 and 2017 in the Department of Radiology of the Medical Faculty, University of Dicle..
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    Distance measurements and origin levels of the coeliac trunk, superior mesenteric artery, and inferior mesenteric artery by multiple-detector computed tomography angiography (Sep, 10.1007/s12565-020-00571-x, 2020, )
    (Springer, 2021) Ekingen, Arzu; Hatipoğlu, Eyüp Savaş; Hamidi, Cihad
    The aim of this study is to determine vertebral levels of the coeliac trunk, the superior mesenteric artery, and the inferior mesenteric artery originated from the abdominal aorta and to calculate the distance measurements between these arteries and between these arteries and the aortic bifurcation by multidetector computed tomography angiography technique. It was determined that the nine diferent vertebral levels of the coeliac trunk, the nine diferent vertebral levels of the superior mesenteric artery, and the eleven diferent vertebral levels of the inferior mesenteric artery. The distance measurements between the coeliac trunk and the superior mesenteric artery, the inferior mesenteric artery, the aortic bifurcation were found signifcant between female and male. In this study, it was determined more diferent levels than the levels described in classical anatomy. The preoperative information of these morphological variations can contribute to the reduction of surgical time and perioperative vascular complications especially for anterior lumbar interbody fusion and defning the location of the primary lymphatic drainage site for gastrointestinal malignancies.
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    The distribution of stylohyoid chain anatomic variations by age groups and gender: an analysis using MDCT
    (Springer, 2013) Ekici, Faysal; Tekbas, Guven; Hamidi, Cihad; Onder, Hakan; Goya, Cemil; Cetincakmak, Mehmet Guli; Gumus, Hatice
    The aim of this study is to investigate the frequency of the SHC variations, and the distribution of the SP lengths in different age and sex groups using MDCT. MDCT scans were performed in 805 patients (401 males, 404 females). The patients were divided into six groups according to their ages. The length of the styloid process (SP) and its angulation on the transverse (TA) and sagittal (SA) planes were measured. Structural variations of the SHC were observed by means of three-dimensional (3D) and multiplanar reconstruction (MPR) images. Absence of the styloid process (n = 10), double proximal origin (n = 13), segmentation (n = 223), complete ossification (n = 24), and an SP with three proximal parts in one patient were among the anomalies detected. The mean length of the SP was greater in males than in females (33.2 +/- A 13.2 vs. 29.6 +/- A 10.5 mm, P < 0.001). Elongated SP (ESP) was observed in 56 % of the patients in the study group, and this ratio was the highest in Group 3 with 65.4 % (P < 0.05). TA and SA were 70.2A degrees A A +/- A 4.1A degrees, 69.9A degrees A A +/- A 4.2A degrees and 86.6A degrees A A +/- A 6.5A degrees, 88.3A degrees A A +/- A 6.6A degrees for the right and left sides, respectively. Besides, 3D and MPR images also present detailed and reliable data to radiologists and surgeons for the evaluation of the SHC. ESP has been detected in more than half of the patients, being more frequent in males and in individuals in the fifth decade of life. For an accurate diagnosis, clinicians should consider the ESP while evaluating the patients in this age group.
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    Evaluation of Parathyroid Lesions With Point Shear Wave Elastography
    (Amer Inst Ultrasound Medicine, 2016) Hattapoglu, Salih; Goya, Cemil; Hamidi, Cihad; Tasdemir, Bekir; Alan, Bircan; Durmaz, Mehmet Sedat; Teke, Memik
    Objectives-The aim of our study was to evaluate the shear wave velocity (SWV) of parathyroid lesions by point shear wave elastography (SWE) and to compare their stiffness with that of thyroid nodules and normal thyroid parenchyma quantitatively. Methods-Thirty-six patients considered to have parathyroid disorders by clinical and laboratory tests and scintigraphy were enrolled in the study between January 2012 and February 2015. Conventional sonography, Doppler sonography, and the Virtual Touch tissue quantification (VTQ) method of point SWE (Siemens Medical Solutions, Mountain View, CA) were conducted with a linear transducer (4-9 MHz) while the patients were in the supine position. Then we compared our VTQ measurements with pathologic results. Results-The 36 patients included 31 female and 5 male patients with a mean age +/- SD of 49 +/- 15.7 years (range, 15-79 years). The mean SWV of parathyroid hyperplasia lesions (n = 4) was 1.46 +/- 0.23 m/s, whereas the mean SWV of parathyroid adenomas (n = 32) was 2.28 +/- 0.50 m/s. The mean SWV of normal thyroid parenchyma (n = 36) was 1.62 +/- 0.20 m/s, and the mean SWV of benign thyroid nodules (n = 21) was 2.25 +/- 0.51 m/s. A significant difference was found between SWV values of normal thyroid parenchyma and parathyroid adenoma (P<.001). A cutoff value of 1.73 m/s for adenomas led to 90.0% sensitivity and 80.6% specificity. Conclusions-The VTQ method of point SWE may contribute to the discrimination of parathyroid adenomas from the thyroid gland. However, more comprehensive studies are needed.
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    Evaluation of pulmonary vein variations and anomalies with 64 slice multi detector computed tomography
    (Springer Wien, 2012) Tekbas, Guven; Gumus, Hatice; Onder, Hakan; Ekici, Faysal; Hamidi, Cihad; Tekbas, Ebru; Gulicetincakmak, Mehmet
    Pulmonary Veins are one of the major structures of circulation. In the last decade, pulmonary veins have been known to play an important role as the triggering focus of the electrical activity in atrial fibrillation. Primary treatment method of AF is RF ablation of the focus. For the best ablation, the anatomy of PVs should be well established before the procedure. MATERIAL AND METHODS: In our radiology department, 783 patients underwent computed tomography angiography between January 2008 and May 2010. Patients were referred for coronary CTA because of known or suspected coronary artery disease or computed tomography pulmonary angiography (CTPA) because of known or suspect pulmonary embolism. All scanning was performed on Philips Brilliance 64 slice Multidetector CT. The group consisted of 402 male and 381 female patients with the average age of 48 (range 14-89). CT data of patients were retrospectively reviewed to identify the PV anatomy and to determine anatomic variants and anomalies. RESULTS: In the majority of cases, two pulmonary veins drain into the left atrium on each side. Eighteen and eight variations were found in the right and left sides, respectively. Most frequent combined variations were 2R-4L (32.3%) and 4L was the more frequent single variation type (76%). In addition to that one Situs inversus totalis (0.12%), two partial anomalous pulmonary venous returns (0.25%) and one scimitar syndrome (0.12%) were found. CONCLUSION: This study showed that multiple types of variations of PVs can be found with increasing patient number. Therefore, for the successful ablation and surgery without any complications, the anatomy of PVs should be known before the procedure. MDCT is a reliable imaging method for the detailed cross-sectional and 3D anatomy.
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    Evaluation of Retrobulbar Blood Flow with Color Doppler Ultrasonography in Patients with Central Serous Chorioretinopathy
    (WILEY-BLACKWELL, 111 RIVER ST, HOBOKEN 07030-5774, NJ USA, 2014) Hamidi, Cihad; Türkçü, Fatih Mehmet; Goya, Cemil; Çetinçakmak, Mehmet Güli; Yüksel, Harun; Teke, Memik; Hattapoğlu, Salih; Bilici, Aslan
    Background. To compare retrobulbar blood flow in patients with central serous chorioretinopathy (CSC) and healthy subjects using color Doppler ultrasonography. Methods. Thirty patients (age 23-54 years) with a first episode of acute CSC and 30 healthy controls (age 30-44 years) were evaluated. The peak systolic blood flow velocity, end-diastolic velocity (EDV), resistance index (RI), and pulsatility index (PI) were measured in the ophthalmic, posterior ciliary, and central retinal arteries. Results. The posterior ciliary and central retinal artery EDV were lower in the patient group than in the control group, whereas RI and PI values were significantly higher (p < .05). The ophthalmic artery peak systolic blood flow velocity and EDV were lower in the CSC than in the control group (p < .05) without significant difference in RI and PI. Conclusions. Color Doppler ultrasonography provides additional insights into the pathophysiology of CSC and may support the vasospasm hypothesis. (C) 2014 Wiley Periodicals, Inc.
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    Evaluation of the relationship between splenic iron overload and liver, heart and muscle features evident on T2?-weighted magnetic resonance imaging
    (Wroclaw University of Medicine, 2020) Çetinçakmak, Mehmet Güli; Hattapoǧlu, Salih; Söker, Murat; Ekici, Faysal; Yılmaz, Kamil; Göya, Cemil; Hamidi, Cihad
    Background. Splenic iron overload is the most common clinical condition in patients with thalassemia. However, few studies of the effects of splenectomy have been published. Objectives. To evaluate the relationship between splenic iron overload and liver, heart and muscle features visible in T2∗-weighted magnetic resonance imaging, and to investigate the effects of splenectomy on these tissues in patients with beta-thalassemia major (TM). Material and methods. We retrospectively included 131 patients (76 male and 55 female) diagnosed with TM. All radiological assessments were performed with the aid of a Philips Achieva 1.5T scanner running a multiecho gradient-echo sequence. Hepatic and splenic T2∗ values were assessed in the same gradient multiecho series. Muscle T2∗ values were assessed in the shoulder girdle muscles adjacent to the heart area. The relationships among splenic T2∗, hepatic T2∗, cardiac T2∗ and muscle T2∗ parameters, serum ferritin levels, age and other parameters were evaluated. Results. The splenic T2∗ value correlated with serum ferritin level and the hepatic T2∗ value (p < 0.001 and p < 0.001, respectively). The splenic T2∗ value did not correlate with age, cardiac or muscle T2∗ values, or with spleen size (p = 0.27, 0.21, 0.99, and 0.39, respectively). The muscle T2∗ value correlated weakly with the serum ferritin level (p = 0.022). The cardiac T2∗ value was lower and the liver size greater in patients who had undergone splenectomy compared with those who had not (p < 0.001 and 0.001, respectively). Conclusions. Splenic iron overload correlated with hepatic overload and the serum ferritin level. Splenectomy increased cardiac iron overload and triggered liver enlargement. However, the muscle iron overload was low and the muscles were therefore unaffected by splenectomy.
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    Evaluation of the surgical anatomy of sphenoid ostium with 3D computed tomography
    (Springer Verlag, 2014) Göçmez, Cüneyt; Goya, Cemil; Hamidi, Cihad; Teke, Memik; Hattapoğlu, Salih; Kamasak, Kağan
    To evaluate the anatomy of the sphenoid ostium (SO), which has so far only been investigated with the aid of two-dimensional computed tomography (CT) or using a cadaver, from a new point of view through the use of 3D CT for the first time. We have evaluated 50 patients who had CT angiography done for different reasons. The sphenoid sinus types and the SO were evaluated three dimensionally. The average diameters of the sphenoid ostia, and their distances to the midline, as well as to each other and the choana have been measured. In addition, the SO were categorized according to their shapes. The average age of the patients was 48.5. No SO was found in seven cases (14 %). The average distance of the SO to the midline was 2.78 mm on the right side and 2.77 on the left. Four different shapes of SO were determined; round, oval, irregular and linear. The average distance of the right and left SO to the choana was 15.22 +/- A 0.95 and 14.87 +/- A 1.11 mm, respectively. No statistically significant difference was found between the male and female sexes with regard to the calculated diameters and shapes of the SO (p > 0.05). The anatomy of the sphenoid sinus and the SO varies widely from individual to individual. We have demonstrated in our study that these anatomic variations could be evaluated pre-operatively. Using this imaging technique, surgeons can make a pre-operative 3D evaluation of the sphenoid ostium, encountered in the surgery and thus achieve better orientation