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Öğe A Comparison of Diagnostic Accuracy of Superior Semicircular Canal Dehiscence in MDCT and MRI, and Coexistence with Tegmen Tympani Dehiscence(Thieme Medical Publ Inc, 2021) Inal, Mikail; Muluk, Nuray Bayar; Sahan, Mehmet H.; Asal, Nese; Simse, Gokce; Arikan, Osman K.Objective Tegmen tympani dehiscence in temporal multidetector computed tomography (MDCT) and superior semicircular canal dehiscence may be seen together. We investigated superior semicircular canal dehiscence in temporal MDCT and temporal magnetic resonance imaging (MRI). Methods In this retrospective study, 127 temporal MRI and MDCT scans of the same patients were reviewed. In all, 48.8% (n = 62) of cases were male, and 51.2% (n = 65) of cases were female. Superior semicircular canal dehiscence and superior semicircular canal-temporal lobe distance were evaluated by both MDCT and MRI. Tegmen tympani dehiscence was evaluated by MDCT. Results Superior semicircular canal dehiscence was detected in 14 cases (5.5%) by temporal MDCT and 15 cases (5.9%) by temporal MRI. In 13 cases (5.1%), it was detected by both MDCT and MRI. In one case (0.4%), it was detected by only temporal MDCT, and in two cases (0.8%), it was detected by only temporal MRI. Median superior semicircular canal-to-temporal distance was 0.66 mm in both males and females in temporal MDCT and temporal MRI. In both temporal MDCT and temporal MRI, as superior semicircular canal-to-temporal lobe distance increased, the presence of superior semicircular canal dehiscence in temporal MDCT and temporal MRI decreased. Tegmen tympani dehiscence was detected in eight cases (6.3%) on the right side and six cases (4.7%) on the left side. The presence of tegmen tympani dehiscence in temporal MDCT and the presence of superior semicircular dehiscence in MDCT and MRI increased. Conclusion Superior semicircular canal dehiscence was detected by both MDCT and MRI. Due to the accuracy of the MRI method to detect superior semicircular dehiscence, we recommend using MRI instead of MDCT to diagnose superior semicircular canal dehiscence. Moreover, there is no radiation exposure from MRI.Öğe Carotid canal and optic canal at sphenoid sinus(Springer, 2019) Asal, Nese; Muluk, Nuray Bayar; Inal, Mikail; Sahan, Mehmet Hamdi; Dogan, Adil; Arikan, Osman KuersatIn the present study, we investigated the relationship between sphenoid sinus, carotid canal, and optic canal on paranasal sinus computed tomography (PNSCT). This study was performed retrospectively. PNSCT images of 300 adult subjects (159 male, 141 female). Sphenoid sinus (pneumatisation, dominancy, septation, inter-sinus septa deviation), anterior clinoid process pneumatisation, Onodi cell, carotid and optic canals (width, dehiscence, classification) were measured. In males, type 3 pneumatised sphenoid sinus (in both sides) and in females type 2 pneumatised sphenoid sinus (right side) and type 3 pneumatised sphenoid sinus (left side) were detected more. Anterior clinoid pneumatisation was present 47.2% in males and 39.7% in females. In male group, more septation (i.e. 22.6%, 3 septa) in sphenoid sinus were detected. Onodi cell was present 26.6 and 19.1% in males and females, respectively. Carotid canal protrudation to the sphenoid sinus wall was present 23.9-32.1% in males and 35.5-36.2% in females. Dehiscence in carotid canal was detected more in females (34%) compared to males (22%). Optic canal protrudation was 33.3 and 30.5% in males and females. Type 4 optic canal was detected more in both gender. Optic canal dehiscence was detected 11.3 and 9.9% in males and females. Carotid and optic canal diameters were higher in males. In pneumatised sphenoid sinuses and in females, type 3 carotid canal (Protrudation to SS wall) (bilaterally) and type 1 optic canal type (No indentation) (ipsilateral side) were detected more. In elderly patients, carotid and optic canal width increased. When carotid canal protrudation was detected, there was no indentation in optic canals In pneumatised SS, carotid canal protrudation was observed with a greater risk in surgery. However, type 1 (non indentation) optic canal was present in highly pneumatised SS with lower risk for the surgery. In women, the risk of carotid canal protruding (about 1/3) is greater than that of males, and carotid canal dehiscence rates are also higher in females. Therefore, physicians should be very careful during the preparatory stages of the sphenoid sinus surgery. Otherwise, it may not be possible to prevent lethal carotid artery bleeds.Öğe Critical Stenosis of the Internal Carotid Artery: Variability in Vertebral Artery Diameters and Areas of Cerebral Chronic Infarction in Computed Tomography(Lippincott Williams & Wilkins, 2019) Sahan, Mehmet Hamdi; Asal, Nese; Muluk, Nuray Bayar; Inal, Mikail; Dogan, AdilObjectives: We investigated unilateral and bilateral cervical internal carotid artery (ICA) stenosis according to the North American Symptomatic Carotid Endarterectomy Trial (NASCET) and the European Carotid Surgery Trial (ECST). Methods: We retrospectively investigated ICA stenosis on Head&Neck Computed Tomography Angiography (CTA); and their simultaneous brain computed tomography images were also evaluated. In unilateral ICA stenosis group (n = 36), 17 of them had right ICA stenosis and 19 left ICA stenosis. In bilateral stenosis group, there were 24 patients. ICA stenosis was evaluated according to NASCET and ECST methods. We also evaluated vertebral artery dimension, plaque density and cerebral infarct (Cerebral kortex, white matter, basal ganglion-thalamus). Results: Unilateral ICA stenosis according to the NASCET was 70.64% to 73.68% (right-left) and according to the ECTS was 65.52% to 71.15% (right-left). For bilateral stenosis, ICA stenosis according to the NASCET was 67.70 to 67.91 (right-left); according to the ECTS was 62.45% to 62.15% (right-left). Vertebral artery dimensions were 3.26 to 3.72 mm (right-left) in unilateral ICA stenosis; and 3.52 to 3.71 mm (right-left) in bilateral ICA stenosis. In bilateral stenosis group, mixt plaque; and in unilateral stenosis group, hard plaque was detected. In unilateral stenosis, white matter and basal ganglion-thalamus infarcts; in bilateral ICA stenosis, cerebral cortical infarct was detected. Left-vertebral artery diameter increased in higher L-ECTS ICA stenosis (unilateral) group. Conclusion: Increase in left vertebral artery diameter in unilateral L-ECTS ICA stenosis may be related to increase of the collateral flow by vertebral arteries to support brain blood-flow.Öğe Does Mastoid Pneumatization Affect Facial Canal Dimensions and Distances of Facial Tympanic Segment-Scutum and Lateral Semicircular Canal-Scutum?(LIPPINCOTT WILLIAMS & WILKINS, 2020) Inal, Mikail; Muluk, Nuray Bayar; Asal, Nese; Sahan, Mehmet Hamdi; Simsek, Gokce; Arikan, Osman KursatObjectives In the present study, we investigated whether mastoid pneumatization affects facial canal dimensions and distances of facial tympanic segment and scutum, and lateral semicircular (LSS) canal and scutum. Methods One hundred sixty-one temporal multidetector computed tomography scans were reviewed. Patients with unilateral sclerotic mastoid pneumatization (no aeration) (group 1, n = 81) and unilateral total mastoid pneumatization (100.0% aeration) (group 2, n = 80) were included. Facial canal dimensions at the labrythine, tympanic, and mastoid segments; facial canal dehiscence and length; and facial tympanic segment-scutum and LSS canal-scutum distances were evaluated. Results In the present study, facial canal dimensions of labyrinthine, tympanic, and mastoid segments in total pneumatized mastoid group were significantly lower than sclerotic mastoids on axial and coronal images (P < 0.05). Facial tympanic segment and scutum distance of the sclerotic mastoid group was significantly lower than those of the total pneumatized mastoid group (P < 0.05). However, LSS canal-scutum distance was not different between both groups (P > 0.05). The LSS canal-scutum distance of the females was lower than those of the males (P < 0.05). Facial canal dehiscence ratio was 11.3% and 11.1% in sclerotic and total pneumatized mastoids, respectively. The mean +/- SD length of the dehiscence was 2.46 +/- 1.29 mm in pneumatized mastoids and 1.92 +/- 0.68 mm in sclerotic mastoids. Conclusions In cholesteatoma cases, scutum erosion may occur. Because facial tympanic segment and scutum distance decreased in sclerotic mastoids compared with completely pneumatized ones, maximum care must be taken in the operations for avoiding to damage facial canal and nerve. Revision cases may be more difficult because of distorted anatomy. However, in pneumatized mastoids, the mean length of the facial canal was more than 2 mm, which must be kept in mind during operations.Öğe Evaluation of peripheral and central olfactory regions by MRI in patients with idiopathic intracranial hypertension(Taylor & Francis Ltd, 2023) Asal, Nese; Muluk, Nuray Bayar; Ozdemir, Adnan; Say, BaharObjectives We investigated the peripheral and central smell regions in patients with idiopathic intracranial hypertension (IIH) by cranial MRI. Methods In this retrospective study, cranial MRI images of 43 adult patients with IIH (Group 1) and 43 healthy adults without IIH (Group 2) were included. In both groups, peripheral [Olfactory bulb (OB) volume and Olfactory sulcus (OS) depth] and central smell regions (insular gyrus and corpus amygdala area, and thalamus volume) were measured in cranial MRI. Results Bilateral OB volume and insular gyrus area, and right corpus amygdala and thalamus volumes of the IIH group were significantly lower than those of the control group (p < 0.05). In the IIH group, OB volume of the right side was significantly lower, and insular gyrus area of the right side was significantly higher than those of the left side (p < 0.05). In the IIH group, there were positive correlations between OB volumes; OS depths; insular gyrus areas; corpus amygdala areas; and thalamus volumes bilaterally (p < 0.05). In older patients, right OS depth and right corpus amygdala area decreased (p < 0.05). Conclusion In conclusion, IIH may be related to olfactory impairment. Cranial MRI images showed a decrease in peripheral (OB volume) and central (insular gyrus and corpus amygdala area and thalamus volume) smell regions. To prevent olfactory impairment in IIH patients, treatment should be done in IIH patients to decrease intracranial pressure. It is very important to prevent the circulation of CSF with increased pressure between the sheets of the olfactory nerve in IIH patients.Öğe Evaluation of peripheral olfactory pathways in chronic autoimmune thyroiditis(Springer, 2022) Inal, Mikail; Asal, Nese; Karahan, Irfan; Gungunes, Askin; Durmaz, Senay ArikanPurpose In this study, we aimed to radiologically evaluate the olfactory bulb (OB) volume and olfactory sulcus (OS) depth of adult patients diagnosed with chronic autoimmune thyroiditis. Methods Sixty-eight patients over 18 years of age with Hashimoto's thyroiditis and 66 healthy controls with normal thyroid function tests were included in the study. OB volume and OS depth measurements were performed using cranial magnetic resonance imaging (MRI) obtained from coronal T2-weighted images. The relationship between thyroid function tests, autoantibodies, and measurements of the OB and OS were evaluated. Results The right and left OB volumes were significantly lower in the patients with Hashimoto's thyroiditis than in the control group (p < 0.05). No significant difference was found between the patient and control groups in terms of OS depth (p > 0.05). There were significantly negative correlations among TSH, thyroid antibodies, and the bilateral OB volume measurements. In the Bonferroni post hoc analysis, when people with euthyroid Hashimoto's thyroiditis and the control group were compared, there was no statistically significant difference between bilateral OB volumes and thyroid function tests. Conclusion Diminished bilateral OB volumes were found in our patients with chronic autoimmune thyroiditis. Interestingly, the OB volumes were not affected in patients with euthyroid Hashimoto's thyroiditis. When a decrease in OB volume is detected on MRI, it should be kept in mind that odor dysfunction in hypothyroid patients with Hashimoto's thyroiditis may occur and patients should be clinically evaluated.Öğe Evaluation of the medial rectus muscle and optic nerve using strain and shear wave elastography in Graves' patients(SPRINGER, 2020) Ozdemir, Adnan; Sahan, Mehmet H.; Asal, Nese; Inal, Mikail; Gungunes, AskinPurpose The purpose of this study was to describe the elastic properties of the medial rectus muscle and optic nerve in Graves' patients without clinically apparent ophthalmopathy using strain elastography (SE) and shear wave elastography (SWE) and to determine whether these elastic properties could be used to aid in the diagnosis of the medial rectus muscle or optic nerve involvement. Materials and methods Thirty participants diagnosed with Graves' disease without ophthalmopathy and 30 healthy volunteers (control group) were prospectively examined between November 2018 and August 2019. SE and SWE findings in both groups were compared using the chi(2)test and the independent samplesttest. Results A statistically significant softening of the medial rectus muscle was observed in the SE patterns of the Graves' patients (p = 0.009). A statistically appreciable distinction was observed between the medial rectus muscle (7.64 +/- 2.1 and 9.20 +/- 1.7 kPa,p = 0.000) and the optic nerve (8.35 +/- 2.8 and 9.37 +/- 1.5 kPa,p = 0.019) in the SWE modulus of the Graves' patients and healthy volunteers. Conclusion SE and SWE can be used to identify structural alterations to the medial rectus muscle and optic nerve before clinically apparent Graves' ophthalmopathy has developed.Öğe Evaluation of the Optic Nerve by Strain and Shear Wave Elastography in Patients With Migraine(Wiley, 2019) Sahan, Mehmet Hamdi; Dogan, Adil; Inal, Mikail; Alpua, Murat; Asal, NeseObjectives To investigate the optic nerve's elastic properties using shear wave and strain elastography in patients with migraine compared to healthy individuals. Methods The migraine group consisted of 30 patients (16 with visual auras and 14 without auras) who had previously had a diagnosis of migraine. These were age and sex matched with healthy participants to form the control group. The findings from shear wave and strain elastography in the groups were compared. The elastographic examination was performed with a 6-15-MHz multifrequency linear array transducer. Results The evaluation involved 30 patients with migraine (3 male and 27 female), whose mean age +/- SD was 34.63 +/- 10 years, and 30 healthy participants (3 males, 27 females), whose mean age was 36.4 +/- 10.5 years. In strain elasticity patterns, a statistically insignificant hardening of the optic nerve in the patients with migraine was observed (P = .052). Analysis of the shear wave elastic modulus values (9.8 +/- 3.34 and 12.3 +/- 5.25 kPa; P = .03) revealed that differences between the healthy participants and patients with migraine were statistically significant. The results for elasticity patterns and the shear modulus suggested that the differences between migraines with and without visual auras were insignificant (P > .05). A positive correlation was discovered between the duration of the disease and the shear modulus in the patients with migraine (r = 0.496; P < .01). Conclusions Histopathologic changes in the optic nerve may be seen in patients with migraine due to possible fibrotic changes. Elastographic techniques can be useful diagnostic tools for investigating these changes.Öğe Is there a relationship between high birth weight and umbilical vein diameter?(TAYLOR & FRANCIS LTD, 2020) Tutus, Sadan; Asal, Nese; Uysal, Gulsum; Sahin, HaticeObjective The aim of the study was to evaluate the associations between sonographical measurements of the umbilical cord and birth weight in 20-24 weeks of gestations. Methods This cross-sectional study was conducted with the participation of 220 low-risk pregnant women between 20-24 gestational weeks. Biparietal diameter, head and abdominal circumference, and femur length were measured for anthropometric calculations. Umbilical cord including umbilical vein diameters, placental thickness, umbilical artery. Doppler measurements (RI, PI) were recorded. Results In accordance with the results of statistical computations, an inverse relationship was found between umbilical vein diameter and birth weight of a large gestational age (LGA) newborn in 20-24 gestational weeks (p < .05). There was no significant relationship between other parameters and birth weight of LGA newborns. Conclusion There is an inverse relationship between birth weights of newborns with LGA and umbilical vein diamater at 20-24 weeks of pregnancy. The umbilical vein diameter in the second trimester may be a promising measurement on predicting LGA fetus. The researches have not confirmed the physiopathology of this finding yet, but it is paving the path for future studies.Öğe Is there a relationship between Onodi cell and optic canal?(Springer, 2019) Ozdemir, Adnan; Muluk, Nuray Bayar; Asal, Nese; Sahan, Mehmet Hamdi; Inal, MikailObjectivesWe investigated the relationship between Onodi cells and optic canal by paranasal sinus computed tomography (PNSCT).MethodsIn this retrospective study, 508 PNSCT (265 males and 243 females) was examined. Onodi cell presence, pneumatization types, optic canal types; and also sphenoid sinusitis and anterior clinoid process pneumatization were evaluated.ResultsThe prevalence of Onodi cells was 21.2% of the patients. Onodi cells were observed 40.7% on the right side and 25.9% on the left side. In 33.4% of the patients, bilateral Onodi cells were present. Male/Female ratio was 24.5%/17.6%. Onodi cell types were detected as Type I>Type II>Type III bilaterally. There was a positive correlation between the right and left Onodi cell types (p<0.05). Optic canal types were detected as Type IV>Type I>Type II>Type III. bilaterally. There was a positive correlation between right and left optic canal types. Onodi cell presence and ACP pneumatization were found as statistically significant (p<0.05). In 65.5% of the patients, Onodi cells and ACP pneumatization were absent. ACP pneumatization was present in 35.4% of the cases. In nine cases, bilateral Onodi cells and ACP pneumatization were detected. Sphenoid sinusitis was detected in 11.4% of Type I and 13.8% of the Type II Onodi cells on the right side. On the left side, it was detected in 12.9% of the Type I and 19.0% of Type II Onodi cells.ConclusionIdentification of Onodi cell is very important clinically because of its proximity to optic nerve canal. We concluded that type IV Onodi-optic canal relationship was the most common finding in our study. Onodi cell presence and their patterns of pneumatization must be evaluated on PNSCT preoperatively to avoid optic canal damage.Öğe Olfactory bulbus volume and olfactory sulcus depth in migraine patients: an MRI evaluation(Springer, 2018) Dogan, Adil; Muluk, Nuray Bayar; Sahan, Mehmet Hamdi; Asal, Nese; Inal, Mikail; Ergun, UfukTo compare the measurements of olfactory bulb volume and olfactory sulcus depth in patients with migraine and a control group. The study included the cranial MRI (1.5 T) images of 200 adults diagnosed with migraine and a control group of 100 subjects without migraine. The control group mainly consisted of the patients with non-migraneous headache. The measurements were obtained from coronal T2-weighted images for standard olfactory bulb (OB) volume and olfactory sulcus (OS) depth. The OB volume and OS depth values were lower in the migraine group than in the control group. In the migraine group, left OB volume of the males was significantly lower than those of the females. In both the migraine and control groups separately, the left-side OB volume values and the right side OS depth values were significantly greater than those of the contralateral side. There were positive correlations between right and left OB volume, and right and left OS depth values. No change was seen in OB volume and OS depth values according to gender. In older patients, a decrease was determined in the right and left OB volume, and the left-side OS depth values. There was a negative correlation between osmophobia and OB volume values. In migraine patients with osmophobia, the OB volume values were significantly decreased. OB volume values were lower in migraine patients. When osmophobia was present, the OB volume was lower than that of the non-osmophobia migraine patients. Olfactory function monitoring with olfactory tests and olfactory volume monitoring on MRI can be recommended for all migraine patients to diagnose olfactory dysfunction earlier, especially those with osmophobia. Because their OB volume values were detected as lower than those of the migraine patients without osmophobia, it may be thought that blood flow changes and osmophobia may affect the olfactory bulb volume shrinkage in migraine patients.Öğe Olfactory bulbus volume and olfactory sulcus depth in psychotic patients and patients with anxiety disorder/depression(Springer, 2018) Asal, Nese; Muluk, Nuray Bayar; Inal, Mikail; Sahan, Mehmet Hamdi; Dogan, Adil; Buturak, Sadiye VisalObjectivesIn the present study, we investigated olfactory bulb (OB) volume and olfactory sulcus (OS) depth of the psychotic patients (predominantly schizophrenia) and patients with anxiety disorder/depression.MethodsThis study was conducted retrospectively. Group 1 consisted of 30 psychotic patients (predominantly schizophrenia) (19 males and 11 females). Group 2 consisted of 37 patients with anxiety disorder/depression (10 males, 27 females). Group 3 consisted of 30 non-psychotic and non-anxiety disorder/depression subjects (9 males and 21 females). OB volume and OS depth measurements were performed on Cranial MRI.ResultsOB volume (right and left) of the psychotic; and anxiety disorder/depression groups were significantly lower than those of the control group (p(adjusted)<0.0175). OS depth (Left) value of anxiety disorder/depression group was significantly lower than those of the control group (p(adjusted)<0.0175). In psychotic and anxiety disorder/depression groups, left OS depth values were significantly lower than those of the right side (p<0.05). In each of the males and females of the anxiety disorder/depression group, left OS depth values were significantly lower than those of the right side (p<0.05). In psychotic group, OS depth (left) values get lower in older patients (p<0.05).ConclusionDecreased OB volume in the psychotic patients and decreased OB volume and OS depth in anxiety disorder/depression patients were detected. Lower OB volume and OS depth are related to the olfactory loss/or olfactory impairment. Physicians should be aware of the olfactory deficits in psychotic patients (mainly schizophrenia) and patients with anxiety disorder/depression. When reduced OB volume is detected on MRI, psychosis, schizophrenia or depression should also be kept in mind and the patients should be evaluated in detail for these diseases.Öğe Pancreas and kidney changes in type 2 diabetes patients: the role of diffusion-weighted imaging(Tubitak Scientific & Technological Research Council Turkey, 2021) Sahan, Mehmet Hamdi; Ozdemir, Adnan; Asal, Nese; Karadeniz Bilgili, Yasemin Mirace; Dogan, Adil; Gungunes, AskinBackground/aim: The aim of this study was to compare renal and pancreatic apparent diffusion-coefficient (ADC) values of diabetic patients and control subjects and to examine their potential association with several diabetes-related clinical parameters. Materials and methods: A total of 80 sex-and age-matched patients were included in the study. Of them, 40 were patients with type 2 diabetes and 40 were nondiabetic participants. Abdominal diffusion-weighted MRIs of both groups were retrospectively reviewed. Diabetes-related clinical parameters were recorded. Results: The difference between the mean ADC values of the patient group and the control group was significant (p = 0.012). It was also found that the mean pancreatic ADC values of diabetic patients and the control group significantly differed (p = 0.02). Besides, there were positive correlations between the mean pancreatic ADC values and age, Hb1Ac level, treatment type, and disease duration (p < 0.05). While eGFR values positively correlated with the mean renal ADC values (p < 0.05), there were negative correlations between such values and age, serum creatinine level, and disease duration (p < 0.05). Conclusion: Renal and pancreatic ADC values of diabetic patients could potentially play a role, as markers of renal and pancreatic functions, in clinical decisions in the follow-up of such patients.Öğe Peripheric smell regions in patients with semicircular canal dehiscence: An MRI evaluation(Elsevier Sci Ltd, 2021) Inal, Mikail; Muluk, Nuray Bayar; Asal, Nese; Celik, Enes NusretObjectives: We investigated the peripheric smell regions in patients with semicircular canal dehiscence (SCD) by cranial MRI. Methods: In this retrospective study, cranial MRI images of 186 adult patients were included. Group 1 consisted of 83 adult patients with SCD. The control group (Group 2) consisted of 83 healthy subjects without central vertigo. Olfactory bulb (OB) volume and olfactory sulcus (OS) depth were measured in all groups. Results: In group 1, SCD was detected on the right (33.7%), left (26.5%) sides and bilateral (39.8%). Localization of dehiscence was at superior SC (75.9%), posterior SC (21.7%), lateral SC (1.2%), and posterior + superior SCs (1.2%). OB volumes of the SCD group were significantly lower than the control group bilaterally (p < 0.05). There were no significant differences between OS depths of groups 1 and 2 (p > 0.05). In SCD group, there were positive correlations between OB volumes; OS depths; and OB volumes and OS depths (p < 0.05). In older patients, bilateral OS depth values got lower (p < 0.05). In females, left OB volume values were lower than males (p < 0.05). In right SCD (+) patients, left OS depth values got lower (p < 0.05). Conclusion: We concluded that possible changes in CSF dynamics may cause the development of SCD at thin bone segments; and a decrease in the OB volume. CSF leaks into the perineural sheet of the olfactory bulb (OB) maybe responsible for the decrease in the OB volume. In addition, minor trauma, infection, and inflammation may also be responsible for both coexistences of SCD development and OB volume decrease. (C) 2021 Elsevier Ltd. All rights reserved.Öğe Peripheric smell regions in patients with temporal and frontal lobe epilepsies: An MRI evaluation(Elsevier Sci Ltd, 2021) Inal, Mikail; Muluk, Nuray Bayar; Asal, Nese; Alpua, MuratObjectives: We investigated peripheric smell regions of olfactory bulb (OB) volume and olfactory sulcus (OS) depth in temporal and frontal lobe epilepsy patients by cranial magnetic resonance imaging (MRI). Methods: In this retrospective study, cranial MRI images of 150 adult patients were included. Group 1 was consisted of 50 adult patients with temporal lobe epilepsy (TLE). Group 2 was consisted of 50 adult patients with frontal lobe epilepsy (FLE). The control group (Group 3) was consisted of 50 healthy subjects without epilepsy. OB volume and OS depth were measured in all groups. Results: OB volumes of the temporal and frontal epilepsy groups were significantly lower than those of the control group (p(adjusted) < 0.0175). However, OS depths were not different between groups 1-3 (p > 0.05). In the temporal and frontal epilepsy groups, there were positive correlations between OB volumes; OS depths; left OB volume and bilateral OS depths p < 0.05). There were no significant correlations between OB volume and OS depth; and age and gender of the epilepsy group (p > 0.05). Conclusion: We concluded that temporal and frontal epilepsy maybe related to decrease in OB volume and may cause olfactory impairment. Olfactory deficit maybe related to central epileptic focus. Therefore, early diagnosis and appropriate treatment of epilepsy are important to prevent olfactory impairment. (C) 2021 Elsevier Ltd. All rights reserved.Öğe Radiological Variabilities in Subcoracoid Impingement: Coracoid Morphology, Coracohumeral Distance, Coracoglenoid Angle, and Coracohumeral Angle(Int Scientific Information, Inc, 2018) Asal, Nese; Sahan, Mehmet HamdiBackground: The aim of this study was to investigate the effects of coracoid morphology, coracohumeral distance, coraco- glenoid angle, and coracohumeral angle variabilities on subcoracoid impingement development using magnetic resonance imaging (MRI). Material/Methods: A total of 200 patients (87 mates with mean age of 51.1 +/- 15.2 years and 113 females with mean age of 52.6 +/- 10.7 years) undergoing shoulder MRI were included in this retrospective study. All MRI studies were performed with standard positioning. Coracoid morphology and subscapularis tendon were evaluated. Coracohumeral distance, coracoglenoid angle and coracohumeral angle were measured in all subjects. One-way ANOVA was used to assess the difference between the groups. For binary comparisons, Tukey post hoc analysis was done. Pearson correlation analysis was performed between variables. Results: Type C coracoid was more frequent in the tendinosis and tendon tear groups. There was a significant difference between type C coracoid and the other coracoid types for coracohumeral distance values (P=0.016). There was a statistically significant decrease in coracoglenoid angle values and coracohumeral distance in patients with subscapularis tendon pathologies (P=0.000). A statistically insignificant increase in coracohumeral angle values was found in the subscapularis tendon pathologies. There was a positive correlation between coracohumeral distance and coracoglenoid angle (R=0.749 P=0.000). There was a negative correlation between coracohumeral distance and coracohumeral angle (R=-0.668 P=0.000) and between coracoglenoid angle and coracohumeral angle (R=-0.605 P=0.000). Conclusions: In subscapularis tendon pathologies, decrease in coracohumeral distance and coracoglenoid angle was observed. A new approach uses coracohumeral angle to evaluate subcoracoid impingement. A statistically insignificant increase in coracohumeral angle was noted.Öğe Sonoelastographic Evaluation of the Lower Lateral Nasal Cartilage Lateral Crus, Auricular Conchal Cartilage, and Costal Cartilage(Thieme Medical Publ Inc, 2019) Sahan, Mehmet Hamdi; Muluk, Nuray Bayar; Inal, Mikail; Asal, Nese; Simsek, Gokce; Arikan, Osman KursatWe investigated the sonoelastographic features of the lower lateral nasal cartilage lateral crus (LLNC-LC), auricular conchal cartilage (ACC), and costal cartilage (CC). In this prospective study, group 1 consisted of 60 participants (30 males and 30 females) between 18 and 35 years of age. Group 2 consisted of 60 participants (30 males and 30 females) between 35 and 50 years of age. Strain elastography (SE) and shear wave elastography (SWE) were performed. For all LLNC-LCs and ACCs, type I SE was detected more in group 2, type II SE was detected more in group 1, and type III SE was detected more in group 1 ( p < 0.05). For CC, type I SE was detected more in both groups ( p < 0.05). For LLNC-LC, type I SE was detected more in males compared with females in both groups ( p < 0.05). For all LLNC-LC, ACC and CC, the SWE modulus of group 2 was significantly higher than that of group 1 ( p < 0.05). In older participants, the SWE modulus increased. We recommend using ACC mainly in rhinoplasty operations for primary and revision cases as its SWE modulus is similar to that of the LLNC-LC. However, due to the higher SWE modulus of CC, CC grafts should not be used as the first choice in rhinoplasties, especially in the reconstruction of the nasal tip contour, but may be used in nasal dorsum augmentation.Öğe Temporal CT Evaluation of the Relationships between Basic Anatomical Structures and the Round Window: Importance for the Cochlear Implant Surgery(Thieme Medical Publ Inc, 2024) Asal, Nese; Muluk, Nuray Bayar; Sarikaya, Pelin Zeynep BekinObjectives In the present study, we investigated the round window (RW) and neighboring anatomical structures using temporal computed tomography (CT) which are important for cochlear implant (CI) electrodes. Methods In this retrospective study, the temporal CT images of 112 adult patients (45 males and 67 females) were evaluated. We classified mastoid pneumatization, and measured RW diameter, RW-carotid canal (CC) distance, RW-facial nerve mastoid segment (FNMS) distance, RW-pyramidal eminence distance, RW-jugular bulb (JB) distance, and RW-internal acoustic canal (IAC) distance. Additionally, RW-cochlea angle and RW-facial nerve angle were also measured. Results RW diameters in males were significantly higher than those in females bilaterally ( p < 0.05). RW-CC distance and RW-JB distance were both smaller than 10mm. RW-IAC distance was 2.54 to 2.68mm, and RW-FNMS distance was 4.20 to 4.40mm. RW-cochlea angle ranged from 39.62 to 41.91degrees and RW-FN angle ranged from 17.28 to 18.40degrees. Males showed better mastoid pneumatization values ( p < 0.05). In higher RW diameters, RW-JB distance decreased, and in pneumatized mastoids, RW-JB distance increased. RW-JB distance and RW-CC distance were detected to increase together ( p < 0.05). Conclusion RW is crucial anatomic structure for CI surgeries. RW diameters are between 1.21 and 1.35mm and lower in the females. Males exhibited better mastoid pneumatization values than the females, and CC and JB distances from RW were farther in well-pneumatized mastoids. Future studies should include comprehensive clinical and surgical findings.
