Nil TokgÖz - Academia.edu (original) (raw)

Papers by Nil TokgÖz

Research paper thumbnail of The contribution of MR spectroscopy on the diagnosis of temporal lobe epilepsy

Research paper thumbnail of Omurga Acilleri

Türk radyoloji seminerleri, Oct 6, 2016

Research paper thumbnail of Posterior Circulation Alberta Stroke Program Early Computed Tomography Score (pc-ASPECT) for the Evaluation of Cerebellar Infarcts

The Neurologist, Jan 20, 2022

BACKGROUND Patients with cerebellar ischemic stroke may be misdiagnosed and may exhibit a delayed... more BACKGROUND Patients with cerebellar ischemic stroke may be misdiagnosed and may exhibit a delayed time to acute stroke treatment compared with patients with anterior circulation ischemic stroke. The posterior circulation Alberta stroke program early computed tomography score (pc-ASPECT) score has been used to evaluate hyperacute stroke, much as the ASPECT in anterior circulation stroke recently. Our main objective was to evaluate the associations of the clinical and etiological characteristics of ischemic cerebellar infarction patients on admission with their pc-ASPECT scores, as well as the correlations of the pc-ASPECT score with morbidity and mortality rates. MATERIALS AND METHODS We include 114 patients with cerebellar infarction who underwent 1 year of follow-up into the study. RESULTS Patients with a pc-ASPECT score <7 were more likely to present with impaired consciousness (P<0.001), multiple posterior circulation infarcts (P<0.001), hydrocephalus (P<0.001), lesions of the vermis (P=0.028), and peduncle (P=0.024), perfusion deficits in the total of posterior inferior cerebellar artery, anterior inferior cerebellar artery, superior cerebellar artery (P<0.05), and basilar artery stenosis (P=0.005), ischemia in additional anatomical structures in the posterior circulation (P<0.001) compared with those with a score ≥7. CONCLUSIONS Although the pc-ASPECT score alone is insufficient in some cases like vertebral artery dissection, using it together with the National Institutes of Health Stroke Scale (NIHSS) score and clinical findings may be beneficial during the hyperacute period of cerebellar ischemia. Presentation with impaired consciousness, basilar artery pathologies, vermian ischemia, and ischemia in additional anatomical structures in the posterior circulation other than the cerebellum appeared as important clinical and radiologic parameters predicting long-term prognosis.

Research paper thumbnail of Spondylodiscitis and Septic Sacroiliitis

Türk Radyoloji Seminerleri

Spondilodiskit ve olası komplikasyonları radyolojik bulgularını öğrenmek Septik sakroiliitin rady... more Spondilodiskit ve olası komplikasyonları radyolojik bulgularını öğrenmek Septik sakroiliitin radyolojik bulgularını öğrenmek GİRİŞ Kas-iskelet enfeksiyonları non-spesifik semptom ve radyolojik bulgular ile karşımıza çıkabileceğinden tanı sırasında güçlüklere neden olabilmektedir. Radyolojik görüntüleme spondilodiskit ve sakroiliitlerde altta yatan en-feksiyöz patojenin paternini karakterize ederek erken tanı ve tedaviye yol göstermekte ve olası sekel bırakma olasılığını azaltmaktadır. Bu yazıda spondilodiskit ve enfektif sakroiliit ile olası komplikasyonlarının radyolojik değerlendirmesi gözden geçirilecektir.

Research paper thumbnail of Efficacy of radiological depth of invasion measurements on magnetic resonance images acquired at different magnetic field strengths and imaging sequences in predicting cervical lymph node metastasis and other outcomes in tongue cancer

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology

Research paper thumbnail of Diagnosis of lumbosacral transitional vertebrae on lumbar MRI: role of spinal and paraspinal anatomic markers and value of additional whole-spine localizer

Research paper thumbnail of The role of multiparametric MRI and 68-Ga-PSMA PET/MRI in determining the location of index tumor in radical prostatectomy specimen

Conclusions: Ga-68 PSMA PET / MRI is more successful in determining the location of index lesion ... more Conclusions: Ga-68 PSMA PET / MRI is more successful in determining the location of index lesion in prostate cancer compared to multiparametric MRI. High total PSA and high PSAD increase the success of both imaging methods.

Research paper thumbnail of Shear Wave Elastography Evaluation of Meniscus Degeneration with Magnetic Resonance Imaging Correlation

Academic Radiology, 2021

RATIONALE AND OBJECTIVES The objective of the study was to assess the diagnostic efficiency of sh... more RATIONALE AND OBJECTIVES The objective of the study was to assess the diagnostic efficiency of shear wave elastography in the grading of meniscal degeneration compared to magnetic resonance imaging (MRI) as a reference standard. MATERIALS AND METHODS Fifty patients were included in the study (who had bilateral knee MRI). Tissue elasticity was measured in the coronal plane from the meniscus body in kilopascal. Nonparametric testing (Mann-Whitney U) was utilized to assess the differences between mean elasticity of the meniscus tissue, gender. The inter-intraobserver agreement was determined by the intraclass correlation coefficient. The correlations between the mean elasticity of the meniscus versus age, height, and body mass index were calculated via the "Pearson Correlation Coefficient Test." The relationship between MRI meniscal degeneration grading and elastography elasticity module was determined via the "Spearman Correlation Test." A p value less than 0.05 was considered statistically significant. RESULTS İnter-intraobserver intraclass correlation coefficient of the lateral and medial meniscus mean stiffness values were good or excellent (>0.8). A statistically significant increase in stiffness of meniscus tissue was observed with an increase in age (p = 0.003 for medial menisci, 0.006 for lateral menisci). Tissue stiffness was higher in the medial meniscus than the lateral meniscus (p < 0.001). A positive correlation was observed between the MRI meniscal degeneration grade and tissue stiffness (p < 0.05). Additionally, mean stiffness values from lateral and medial menisci were higher in the group with degeneration (p < 0.0001). CONCLUSION Meniscus stiffness is increased with aging. There was a statistically significant positive correlation between meniscal stiffness and degeneration grading in MRI.

Research paper thumbnail of DIAGNOSTIC ACCURACY OF 68Ga-PSMA PET/MRI AND MULTIPARAMETRIC MRI IN DETECTING INDEX TUMOR IN RADICAL PROSTATECTOMY SPECIMEN

Objective To evaluate the diagnostic accuracy of the 68Gallium (68Ga) - prostate specific membran... more Objective To evaluate the diagnostic accuracy of the 68Gallium (68Ga) - prostate specific membrane antigen (PSMA) positron emission tomography/magnetic resonance imaging (PET/MRI) and multiparametric MRI (mpMRI) by region-based comparison of index tumour localisations using histopathological tumour maps of patients who underwent radical prostatectomy due to clinically significant prostate cancer. Patients and Methods The study included 64 patients who underwent radical prostatectomy after primary staging with mpMRI and 68Ga-PSMA PET/MRI. Diagnostic analysis was performed by dividing the prostate into four anatomic regions as left/right anterior and left/right posterior. The extension of the lesions in mpMRI and the pathological uptake in 68Ga-PSMA PET/MRI were matched separately for each region with the extension of the index tumour into each region. Results The sensitivity, specificity, positive predictive value, negative predictive value, positive likelihood ratio, negative likeli...

Research paper thumbnail of Functional Imaging Using 3D High-sampling-Efficiency Technique (SPACE) versus Conventional CSF Flow Techniques in Patient with Hydrocephalus at 3 Tesla

Research paper thumbnail of Comparison of Spinal Diffusion-weighted Imaging and Apparent Diffusion Coefficient Values to Differentiate the Spinal Infections, Tumors, and Degenerative Changes

PURPOSE The aim of our study is to compare the diffusion weighted images and apparent diffusion c... more PURPOSE The aim of our study is to compare the diffusion weighted images and apparent diffusion coefficient (ADC) values with echo-planar diffusion-weighted MRI in patients with spondylodiscitis, degenerative changes, and vertebral metastases. METHOD AND MATERIALS Thirty-one patients (11 degenerative changes, 10 with spondylodiscitis, 10 metastases) were examined with echo-planar diffusion-weighted MRI. The DWI was performed using a 1.5-T system, echo-planar pulse sequence with b = 600 s/mm2. Following the qualitative evaluation, DWI ratios, the relative intensity of the pathological vertebrae to the normal appearing vertebrae (DWIpathologic/DWInormal) on DW images, and ADC ratio (ADCpathologic/ADCnormal) from ADC maps were calculated. RESULTS The DWI ratios for degenerative changes, spondylodiscitis, and metastases were 1.52±0.52, 2.21±1.23, 2.41±0.99, respectively. The mean ADC values for normal bone marrow, degenerative changes, spondylodiscitis, and metastases were 0.47±0.14×10−...

Research paper thumbnail of An approach to objective analysis of cerebrospinal fluid flow dynamics with phase-contrast magnetic resonance imaging

Acta neurochirurgica, 2014

ABSTRACT Dear Editor,We read with interest the clinical article written by Wang et al. entitled “... more ABSTRACT Dear Editor,We read with interest the clinical article written by Wang et al. entitled “Analysis of cerebrospinal fluid flow dynamics and morphology in Chiari 1 malformation with cine phase-contrast magnetic resonance imaging” [8]. The authors performed morphologic and physiologic differences in control subjects and patients with Chiari 1 malformation (C1M) and assessed differences in CSF flow dynamics before and after surgery in patients with C1M using cine phase-contrast magnetic resonance imaging (PCMRI) techniques. They finally found that peak velocity of CSF flow was increased after surgery in C1M patients. I would like to clarify some points and contribute regarding the usefulness of PCMRI in the evaluation and differentiation of C1M along with the related data provided in the literature and our experience.First, it was not clear (due to the small size of the illustrated figure and that the placement of ROIs was not clearly explained) to quantify CSF flow dynamics whether these w ...

Research paper thumbnail of Familial Mediterranean fever mimicking septic arthritis: distinguishing with diffusion weighted imaging

Skeletal Radiology, 2006

FMF arthritis is generally monoarticular in origin. The affected joint is hot, tender, red and mi... more FMF arthritis is generally monoarticular in origin. The affected joint is hot, tender, red and mimics septic arthritis. Conventional imaging findings, including magnetic resonance imaging (MRI) and ultrasound, do not help differentiate between these two entities. The final diagnosis depends on culture of the synovial fluid, and therefore initiation of proper drug therapy can be delayed. Diffusion weighted imaging (DWI), with its ability to detect altered water-proton mobility, might play an important role as a fast and non-invasive problemsolving tool in this setting. We here present MRI and DWI findings of a case of FMF arthritis mimicking septic arthritis.

Research paper thumbnail of Imaging meningiomas: Is there a need for post-contrast FLAIR?

Clinical Radiology, 2005

The aim of this study was to compare post-contrast fluid-attenuated inversion recovery (FLAIR) im... more The aim of this study was to compare post-contrast fluid-attenuated inversion recovery (FLAIR) imaging with post-contrast T1-weighted images (T1WI) in depicting meningiomas. MATERIALS AND METHODS: Twenty-nine patients with 46 meningiomas were included in this study. FLAIR and T1WI were obtained before and after intravenous administration of gadopentetate dimeglumine. The contrast enhancement degree, contrast enhancement pattern, lesion conspicuity, and the detection of the dural sign were compared between post-contrast FLAIR images and post-contrast T1WI. RESULTS: The enhencement degree on FLAIR was equal or less than T1WI for all meningiomas. Among 46 meningiomas 38 (83%) enhanced homogeneously and eight (17%) inhomogeneously on T1WI. On contrast-enhanced FLAIR images, of the total 46 meningiomas 22 (48%) enhanced homogeneously, eight (17%) inhomogeneously, whereas 14 (30%) meningiomas showed a peripheral rim enhancement not observed on T1WI. Two (5%) meningiomas showed no contrast enhancement on post-contrast FLAIR images. Among the 14 meningiomas showing rim enhancement using FLAIR imaging, 12 (85%) were measured to be 2 cm or more in diameter. A dural tail sign was found in 16 (35%) and 23 (50%) meningiomas on post-contrast T1WI and FLAIR images, respectively. CONCLUSION: In contrast to other extra-axial diseases, post-contrast FLAIR sequence was not found to be a valuable adjunct to contrast-enhanced T1WI in the depiction of meningiomas.

Research paper thumbnail of Absence of the medial sesamoid bone associated with metatarsophalangeal pain

Clinical Anatomy, 2006

Pain at the first metatarsophalangeal (MTP) joint can result from inflammation, chondromalacia, f... more Pain at the first metatarsophalangeal (MTP) joint can result from inflammation, chondromalacia, flexor hallucis brevis tendinitis, osteochondritis dessecans, fracture of a sesamoid bone, avascular necrosis of sesamoids, inflamed bursae, intractable keratoses, infection, sesamoiditis, gout arthropathy, and rheumatoid arthritis. Congenital absence of a sesamoid bone is extremely rare. We present a 17-year-old male patient with pain at the plantar aspect of the right MTP joint associated with congenital absence of the medial sesamoid. There was tenderness and the range of motion was minimally restricted. He described the pain as necessitating changes in his social life. On radiographs, the medial hallucial sesamoid was absent on the right side. The MTP joint was also evaluated using magnetic resonance imaging (MRI). A metatarsal pad was prescribed and the patient was satisfied with the treatment at the 2 months follow-up period. MRI revealed no pathological tissue at the medial sesamoid site. Hallucial sesamoids absorb pressure, reduce friction, protect the tendons, act like a fulcrum to increase the mechanical force of the tendons, and provide a dynamic function to the great toe by elevating first metatarsal head. Congenital absence of these bones is very rare but we must consider it in a patient with MTP joint pain.

Research paper thumbnail of Persistent Notochordal Canal Mimicking Compression Fracture: A Case Report

Acta Radiologica, 2006

A persistent notochordal canal is a rare anomaly that is generally discovered by chance. The radi... more A persistent notochordal canal is a rare anomaly that is generally discovered by chance. The radiographic appearance of this entity is characteristic and usually does not require further investigation. However, in some cases plain films may fail to depict this appearance, and computed tomography or magnetic resonance imaging (MRI) is required for final diagnosis. We report the MRI findings of a young woman with persistent notochordal canal who, based on plain radiographs, had first been misdiagnosed as having a compression fracture.

Research paper thumbnail of Corpus callosum hematoma secondary to isolated inferior sagittal sinus thrombosis

Acta Radiologica, 2006

A 45-year-old female was admitted with headache and vomiting. Cranial computed tomography (CT) de... more A 45-year-old female was admitted with headache and vomiting. Cranial computed tomography (CT) demonstrated a callosal hematoma. Magnetic resonance imaging (MRI) showed no venous flow and thrombus replacing the inferior sagittal sinus (ISS) lumen. Under appropriate medical treatment and close follow-up she recovered quickly and, after 2 years, was doing well with corpus callosum infarcts. Isolated inferior sagittal sinus thrombosis is an extremely rare condition with only one previously reported case in the literature. Although it is very rare, isolated inferior sagittal sinus thrombosis should be considered in the differential diagnosis of non-traumatic corpus callosum hematoma.

Research paper thumbnail of Neoplazik Olmayan Kemik Iligi Bozukluklari

Türk Radyoloji Seminerleri, 2017

Research paper thumbnail of Kemik Tumorlerinde Radyolojik Degerlendirme

Türk Radyoloji Seminerleri, 2021

Research paper thumbnail of Short-latency afferent inhibition remains intact without cortical somatosensory input: Evidence from a patient with isolated thalamic infarct

Research paper thumbnail of The contribution of MR spectroscopy on the diagnosis of temporal lobe epilepsy

Research paper thumbnail of Omurga Acilleri

Türk radyoloji seminerleri, Oct 6, 2016

Research paper thumbnail of Posterior Circulation Alberta Stroke Program Early Computed Tomography Score (pc-ASPECT) for the Evaluation of Cerebellar Infarcts

The Neurologist, Jan 20, 2022

BACKGROUND Patients with cerebellar ischemic stroke may be misdiagnosed and may exhibit a delayed... more BACKGROUND Patients with cerebellar ischemic stroke may be misdiagnosed and may exhibit a delayed time to acute stroke treatment compared with patients with anterior circulation ischemic stroke. The posterior circulation Alberta stroke program early computed tomography score (pc-ASPECT) score has been used to evaluate hyperacute stroke, much as the ASPECT in anterior circulation stroke recently. Our main objective was to evaluate the associations of the clinical and etiological characteristics of ischemic cerebellar infarction patients on admission with their pc-ASPECT scores, as well as the correlations of the pc-ASPECT score with morbidity and mortality rates. MATERIALS AND METHODS We include 114 patients with cerebellar infarction who underwent 1 year of follow-up into the study. RESULTS Patients with a pc-ASPECT score <7 were more likely to present with impaired consciousness (P<0.001), multiple posterior circulation infarcts (P<0.001), hydrocephalus (P<0.001), lesions of the vermis (P=0.028), and peduncle (P=0.024), perfusion deficits in the total of posterior inferior cerebellar artery, anterior inferior cerebellar artery, superior cerebellar artery (P<0.05), and basilar artery stenosis (P=0.005), ischemia in additional anatomical structures in the posterior circulation (P<0.001) compared with those with a score ≥7. CONCLUSIONS Although the pc-ASPECT score alone is insufficient in some cases like vertebral artery dissection, using it together with the National Institutes of Health Stroke Scale (NIHSS) score and clinical findings may be beneficial during the hyperacute period of cerebellar ischemia. Presentation with impaired consciousness, basilar artery pathologies, vermian ischemia, and ischemia in additional anatomical structures in the posterior circulation other than the cerebellum appeared as important clinical and radiologic parameters predicting long-term prognosis.

Research paper thumbnail of Spondylodiscitis and Septic Sacroiliitis

Türk Radyoloji Seminerleri

Spondilodiskit ve olası komplikasyonları radyolojik bulgularını öğrenmek Septik sakroiliitin rady... more Spondilodiskit ve olası komplikasyonları radyolojik bulgularını öğrenmek Septik sakroiliitin radyolojik bulgularını öğrenmek GİRİŞ Kas-iskelet enfeksiyonları non-spesifik semptom ve radyolojik bulgular ile karşımıza çıkabileceğinden tanı sırasında güçlüklere neden olabilmektedir. Radyolojik görüntüleme spondilodiskit ve sakroiliitlerde altta yatan en-feksiyöz patojenin paternini karakterize ederek erken tanı ve tedaviye yol göstermekte ve olası sekel bırakma olasılığını azaltmaktadır. Bu yazıda spondilodiskit ve enfektif sakroiliit ile olası komplikasyonlarının radyolojik değerlendirmesi gözden geçirilecektir.

Research paper thumbnail of Efficacy of radiological depth of invasion measurements on magnetic resonance images acquired at different magnetic field strengths and imaging sequences in predicting cervical lymph node metastasis and other outcomes in tongue cancer

Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology

Research paper thumbnail of Diagnosis of lumbosacral transitional vertebrae on lumbar MRI: role of spinal and paraspinal anatomic markers and value of additional whole-spine localizer

Research paper thumbnail of The role of multiparametric MRI and 68-Ga-PSMA PET/MRI in determining the location of index tumor in radical prostatectomy specimen

Conclusions: Ga-68 PSMA PET / MRI is more successful in determining the location of index lesion ... more Conclusions: Ga-68 PSMA PET / MRI is more successful in determining the location of index lesion in prostate cancer compared to multiparametric MRI. High total PSA and high PSAD increase the success of both imaging methods.

Research paper thumbnail of Shear Wave Elastography Evaluation of Meniscus Degeneration with Magnetic Resonance Imaging Correlation

Academic Radiology, 2021

RATIONALE AND OBJECTIVES The objective of the study was to assess the diagnostic efficiency of sh... more RATIONALE AND OBJECTIVES The objective of the study was to assess the diagnostic efficiency of shear wave elastography in the grading of meniscal degeneration compared to magnetic resonance imaging (MRI) as a reference standard. MATERIALS AND METHODS Fifty patients were included in the study (who had bilateral knee MRI). Tissue elasticity was measured in the coronal plane from the meniscus body in kilopascal. Nonparametric testing (Mann-Whitney U) was utilized to assess the differences between mean elasticity of the meniscus tissue, gender. The inter-intraobserver agreement was determined by the intraclass correlation coefficient. The correlations between the mean elasticity of the meniscus versus age, height, and body mass index were calculated via the "Pearson Correlation Coefficient Test." The relationship between MRI meniscal degeneration grading and elastography elasticity module was determined via the "Spearman Correlation Test." A p value less than 0.05 was considered statistically significant. RESULTS İnter-intraobserver intraclass correlation coefficient of the lateral and medial meniscus mean stiffness values were good or excellent (>0.8). A statistically significant increase in stiffness of meniscus tissue was observed with an increase in age (p = 0.003 for medial menisci, 0.006 for lateral menisci). Tissue stiffness was higher in the medial meniscus than the lateral meniscus (p < 0.001). A positive correlation was observed between the MRI meniscal degeneration grade and tissue stiffness (p < 0.05). Additionally, mean stiffness values from lateral and medial menisci were higher in the group with degeneration (p < 0.0001). CONCLUSION Meniscus stiffness is increased with aging. There was a statistically significant positive correlation between meniscal stiffness and degeneration grading in MRI.

Research paper thumbnail of DIAGNOSTIC ACCURACY OF 68Ga-PSMA PET/MRI AND MULTIPARAMETRIC MRI IN DETECTING INDEX TUMOR IN RADICAL PROSTATECTOMY SPECIMEN

Objective To evaluate the diagnostic accuracy of the 68Gallium (68Ga) - prostate specific membran... more Objective To evaluate the diagnostic accuracy of the 68Gallium (68Ga) - prostate specific membrane antigen (PSMA) positron emission tomography/magnetic resonance imaging (PET/MRI) and multiparametric MRI (mpMRI) by region-based comparison of index tumour localisations using histopathological tumour maps of patients who underwent radical prostatectomy due to clinically significant prostate cancer. Patients and Methods The study included 64 patients who underwent radical prostatectomy after primary staging with mpMRI and 68Ga-PSMA PET/MRI. Diagnostic analysis was performed by dividing the prostate into four anatomic regions as left/right anterior and left/right posterior. The extension of the lesions in mpMRI and the pathological uptake in 68Ga-PSMA PET/MRI were matched separately for each region with the extension of the index tumour into each region. Results The sensitivity, specificity, positive predictive value, negative predictive value, positive likelihood ratio, negative likeli...

Research paper thumbnail of Functional Imaging Using 3D High-sampling-Efficiency Technique (SPACE) versus Conventional CSF Flow Techniques in Patient with Hydrocephalus at 3 Tesla

Research paper thumbnail of Comparison of Spinal Diffusion-weighted Imaging and Apparent Diffusion Coefficient Values to Differentiate the Spinal Infections, Tumors, and Degenerative Changes

PURPOSE The aim of our study is to compare the diffusion weighted images and apparent diffusion c... more PURPOSE The aim of our study is to compare the diffusion weighted images and apparent diffusion coefficient (ADC) values with echo-planar diffusion-weighted MRI in patients with spondylodiscitis, degenerative changes, and vertebral metastases. METHOD AND MATERIALS Thirty-one patients (11 degenerative changes, 10 with spondylodiscitis, 10 metastases) were examined with echo-planar diffusion-weighted MRI. The DWI was performed using a 1.5-T system, echo-planar pulse sequence with b = 600 s/mm2. Following the qualitative evaluation, DWI ratios, the relative intensity of the pathological vertebrae to the normal appearing vertebrae (DWIpathologic/DWInormal) on DW images, and ADC ratio (ADCpathologic/ADCnormal) from ADC maps were calculated. RESULTS The DWI ratios for degenerative changes, spondylodiscitis, and metastases were 1.52±0.52, 2.21±1.23, 2.41±0.99, respectively. The mean ADC values for normal bone marrow, degenerative changes, spondylodiscitis, and metastases were 0.47±0.14×10−...

Research paper thumbnail of An approach to objective analysis of cerebrospinal fluid flow dynamics with phase-contrast magnetic resonance imaging

Acta neurochirurgica, 2014

ABSTRACT Dear Editor,We read with interest the clinical article written by Wang et al. entitled “... more ABSTRACT Dear Editor,We read with interest the clinical article written by Wang et al. entitled “Analysis of cerebrospinal fluid flow dynamics and morphology in Chiari 1 malformation with cine phase-contrast magnetic resonance imaging” [8]. The authors performed morphologic and physiologic differences in control subjects and patients with Chiari 1 malformation (C1M) and assessed differences in CSF flow dynamics before and after surgery in patients with C1M using cine phase-contrast magnetic resonance imaging (PCMRI) techniques. They finally found that peak velocity of CSF flow was increased after surgery in C1M patients. I would like to clarify some points and contribute regarding the usefulness of PCMRI in the evaluation and differentiation of C1M along with the related data provided in the literature and our experience.First, it was not clear (due to the small size of the illustrated figure and that the placement of ROIs was not clearly explained) to quantify CSF flow dynamics whether these w ...

Research paper thumbnail of Familial Mediterranean fever mimicking septic arthritis: distinguishing with diffusion weighted imaging

Skeletal Radiology, 2006

FMF arthritis is generally monoarticular in origin. The affected joint is hot, tender, red and mi... more FMF arthritis is generally monoarticular in origin. The affected joint is hot, tender, red and mimics septic arthritis. Conventional imaging findings, including magnetic resonance imaging (MRI) and ultrasound, do not help differentiate between these two entities. The final diagnosis depends on culture of the synovial fluid, and therefore initiation of proper drug therapy can be delayed. Diffusion weighted imaging (DWI), with its ability to detect altered water-proton mobility, might play an important role as a fast and non-invasive problemsolving tool in this setting. We here present MRI and DWI findings of a case of FMF arthritis mimicking septic arthritis.

Research paper thumbnail of Imaging meningiomas: Is there a need for post-contrast FLAIR?

Clinical Radiology, 2005

The aim of this study was to compare post-contrast fluid-attenuated inversion recovery (FLAIR) im... more The aim of this study was to compare post-contrast fluid-attenuated inversion recovery (FLAIR) imaging with post-contrast T1-weighted images (T1WI) in depicting meningiomas. MATERIALS AND METHODS: Twenty-nine patients with 46 meningiomas were included in this study. FLAIR and T1WI were obtained before and after intravenous administration of gadopentetate dimeglumine. The contrast enhancement degree, contrast enhancement pattern, lesion conspicuity, and the detection of the dural sign were compared between post-contrast FLAIR images and post-contrast T1WI. RESULTS: The enhencement degree on FLAIR was equal or less than T1WI for all meningiomas. Among 46 meningiomas 38 (83%) enhanced homogeneously and eight (17%) inhomogeneously on T1WI. On contrast-enhanced FLAIR images, of the total 46 meningiomas 22 (48%) enhanced homogeneously, eight (17%) inhomogeneously, whereas 14 (30%) meningiomas showed a peripheral rim enhancement not observed on T1WI. Two (5%) meningiomas showed no contrast enhancement on post-contrast FLAIR images. Among the 14 meningiomas showing rim enhancement using FLAIR imaging, 12 (85%) were measured to be 2 cm or more in diameter. A dural tail sign was found in 16 (35%) and 23 (50%) meningiomas on post-contrast T1WI and FLAIR images, respectively. CONCLUSION: In contrast to other extra-axial diseases, post-contrast FLAIR sequence was not found to be a valuable adjunct to contrast-enhanced T1WI in the depiction of meningiomas.

Research paper thumbnail of Absence of the medial sesamoid bone associated with metatarsophalangeal pain

Clinical Anatomy, 2006

Pain at the first metatarsophalangeal (MTP) joint can result from inflammation, chondromalacia, f... more Pain at the first metatarsophalangeal (MTP) joint can result from inflammation, chondromalacia, flexor hallucis brevis tendinitis, osteochondritis dessecans, fracture of a sesamoid bone, avascular necrosis of sesamoids, inflamed bursae, intractable keratoses, infection, sesamoiditis, gout arthropathy, and rheumatoid arthritis. Congenital absence of a sesamoid bone is extremely rare. We present a 17-year-old male patient with pain at the plantar aspect of the right MTP joint associated with congenital absence of the medial sesamoid. There was tenderness and the range of motion was minimally restricted. He described the pain as necessitating changes in his social life. On radiographs, the medial hallucial sesamoid was absent on the right side. The MTP joint was also evaluated using magnetic resonance imaging (MRI). A metatarsal pad was prescribed and the patient was satisfied with the treatment at the 2 months follow-up period. MRI revealed no pathological tissue at the medial sesamoid site. Hallucial sesamoids absorb pressure, reduce friction, protect the tendons, act like a fulcrum to increase the mechanical force of the tendons, and provide a dynamic function to the great toe by elevating first metatarsal head. Congenital absence of these bones is very rare but we must consider it in a patient with MTP joint pain.

Research paper thumbnail of Persistent Notochordal Canal Mimicking Compression Fracture: A Case Report

Acta Radiologica, 2006

A persistent notochordal canal is a rare anomaly that is generally discovered by chance. The radi... more A persistent notochordal canal is a rare anomaly that is generally discovered by chance. The radiographic appearance of this entity is characteristic and usually does not require further investigation. However, in some cases plain films may fail to depict this appearance, and computed tomography or magnetic resonance imaging (MRI) is required for final diagnosis. We report the MRI findings of a young woman with persistent notochordal canal who, based on plain radiographs, had first been misdiagnosed as having a compression fracture.

Research paper thumbnail of Corpus callosum hematoma secondary to isolated inferior sagittal sinus thrombosis

Acta Radiologica, 2006

A 45-year-old female was admitted with headache and vomiting. Cranial computed tomography (CT) de... more A 45-year-old female was admitted with headache and vomiting. Cranial computed tomography (CT) demonstrated a callosal hematoma. Magnetic resonance imaging (MRI) showed no venous flow and thrombus replacing the inferior sagittal sinus (ISS) lumen. Under appropriate medical treatment and close follow-up she recovered quickly and, after 2 years, was doing well with corpus callosum infarcts. Isolated inferior sagittal sinus thrombosis is an extremely rare condition with only one previously reported case in the literature. Although it is very rare, isolated inferior sagittal sinus thrombosis should be considered in the differential diagnosis of non-traumatic corpus callosum hematoma.

Research paper thumbnail of Neoplazik Olmayan Kemik Iligi Bozukluklari

Türk Radyoloji Seminerleri, 2017

Research paper thumbnail of Kemik Tumorlerinde Radyolojik Degerlendirme

Türk Radyoloji Seminerleri, 2021

Research paper thumbnail of Short-latency afferent inhibition remains intact without cortical somatosensory input: Evidence from a patient with isolated thalamic infarct