An unusual presentation of a cholesterol granuloma in a pneumatized pterygoid process of the sphenoid sinus.
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Aged↗
Biomedical subjects
Nafi Aygun
Publications and source records attributed to Nafi Aygun.
Hemangioma of the vertical segment of the facial nerve.
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Cranial Nerve Neoplasms↗
Head and neck imaging at 3T.
For the theoretic advantages of 3T units to translate to improved diagnostic quality, careful attention must be paid to optimization of pulse sequences and development of clinically feasible imaging protocols. RARE sequences continue to be the choice for routine clinical imaging of the head and neck; although exquisite T2W images are afforded, T1W imaging is problematic. Short ETLT1W RARE imaging seems to be a good compromise.
Artifacts↗
Imaging for functional endoscopic sinus surgery.
Radiologic imaging is an essential part of the presurgical evaluation of patients with sinusitis and of the monitoring of difficult-to-treat,recurrent, and postsurgical disease. In patients with noninflammatory sinus pathology and those who "baffle" clinical diagnosis, ima-ging is extremely helpful in differentiating the various pathological entities and determining the extent of disease. Computerized tomography (CT), when deemed clinically necessary, is the current modality of choice to evaluate sinusitis. CT's ability to display bone,mucosa, and air makes it a perfect tool for imaging of the paranasal sinuses. The fine bony architecture of the nasal cavity and the para-nasal sinus drainage pathways are depicted accurately with CT examination.
Endoscopy↗
Advances in imaging of the paranasal sinuses.
Significant changes in surgical technique, surgical instrumentation, and imaging technology have occurred during the past 20 years. These changes have largely resulted from a better understanding of the pathophysiology ofa specific pathologic process, the inflammation of paranasal sinus mucosa. As surgical techniques were adapted to address clinical issues, new instrumentation was developed. Changes in imaging technology were also a result of these and similar issues pressing from other similar medical/surgical fields. The obsolescence of plain-film imaging is being addressed by miniaturization of large and bulky cross-sectional imaging equipment that will gradually become available and embraced by the clinical practice. These changes will bring about greater responsibilities, the foremost of which is vigilance in reducing radiation dose to the patient.
Humans↗
Silent sinus syndrome: an acquired condition.
We present the case of a 30-year-old man with silent sinus syndrome. A CT scan obtained 10 years earlier showed completely normal maxillary sinuses. This case illustrates the acquired nature of this disorder.
Adult↗
Imaging findings of CNS atypical teratoid/rhabdoid tumors.
Four patients with brain tumors were diagnosed with atypical teratoid/rhabdoid tumors and underwent CT and MR imaging. For all tumors, aggressive features were shown by imaging studies and included hydrocephalus, apparent invasion of the adjacent brain and dura, and marked mass effect. The striking heterogeneity of the atypical teratoid/rhabdoid tumor shown by imaging studies reflects the histopathologic complexity of these tumors, and awareness of atypical teratoid/rhabdoid tumor is important in making the correct diagnosis of this uncommon but probably underdiagnosed entity.
Adolescent↗
Diagnostic imaging for intracerebral hemorrhage.
Magnetic resonance imaging (MRI) is an excellent tool for the diagnosis and evaluation of intracerebral hemorrhage with its unique specificity to hemoglobin degradation products in different stages. Computed tomography (CT) remains the diagnostic test of choice in the setting of acute intracerebral hemorrhage because of its exquisite sensitivity and specificity for small amounts of intracerebral hemorrhage (although there is emerging evidence that MRI may be as sensitive as CT). The effects of the biochemical evolution of intracerebral hemorrhage on the temporal MRI signal changes are described. This article discusses imaging features of the common causes of intracerebral hemorrhage.
Acute Disease↗