Advanced Diagnostic & Interventional Radiology Research Center | Patient with High Flow Carotid-Cavernous Fistula

Advanced Diagnostic & Interventional Radiology Research Center | Patient with High Flow Carotid-Cavernous Fistula
| Jan 2 2026
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Advanced Diagnostic & Interventional Radiology Research Center

COVID-19 pandemic 

During the COVID-19 pandemic, the Radiology Research Center at Tehran University of Medical Sciences continued its research activities despite the challenges posed by the increased demand for CT scans of COVID-19 patients and the necessity of adhering to strict health protocols. This center played a crucial role in improving medical imaging techniques, optimizing diagnostic protocols, and advancing technologies related to CT scan image analysis.

Faculty members, researchers, and staff remained committed to ensuring the safety and well-being of healthcare professionals and patients while actively engaging in imaging data analysis, developing artificial intelligence algorithms for faster disease detection, publishing scientific articles, and presenting their findings at international conferences. These efforts aimed to enhance diagnostic accuracy, improve treatment processes, and alleviate pressure on healthcare systems.

 

Key achievements of the Radiology Research Center during the COVID-19 pandemic include:


✔️ Development and optimization of lung imaging protocols for faster and more accurate COVID-19 diagnosis
✔️ Implementation of artificial intelligence technologies for automated CT scan analysis and reduced diagnosis time
✔️ Publication of high-impact research articles on innovative imaging methods for COVID-19 patients
✔️ Participation in national and international projects focused on COVID-19 diagnosis and patient management

The center remains dedicated to advancing research in medical imaging and continues to contribute as a leading scientific institution in improving the quality of diagnostic and therapeutic services.

 

Some of the center's significant achievements during the pandemic include:

 

  • Release Date : Jul 26 2023 - 12:15
  • : 21
  • Study time : 1 minute(s)

Unilateral Blindness as the Only Finding in a Patient with High Flow Carotid-Cavernous Fistula

The authors reported a patient with unilateral blindness of the left eye after trauma. Apart from paralysis of the 4th cranial nerve and mild optic nerve edema, there was no structural problem during the ophthalmologic examination. Brain CT scan, CT angiography and MRI demonstrated aneurysm in the left pericavernous region. The patient underwent angiography for coiling of the aneurysm, which detected large carotid cavernous fistula (CCF) mainly draining into the petrous sinus. Therapeutic embolization was performed with balloon and the CCF vanished completely. The most important points of this case are the blindness without exophthalmia as the only presentation of CCF which has not been reported as the only symptom and failure of CT-angiography and MRI evaluation for the diagnosis of CCF

High Flow Carotid-Cavernous Fistula {faces}
Carotid-cavernous fistula (CCF) is an abnormal communication between thearterial and venous system which occurs within the cavernous sinus an categorized according to pathological, hemodynamic or angiographic criteria.1,2 Th rare condition mostly occurs after head trauma.1,2 In angiography, lesions that directly receive their flow from the internal carotid artery (ICA) (direct type of CCF) are high-flow, and those that receive their flow from dural branches of the internal or external carotid system (indirect type) are usually
low-flow fistulae.1 The size, duration, location, venous drainage pattern and collateral vascular anatomy are very important factors for the clinical manifestations. Venous drainage from the anterior region into the ophthalmic veins or posterior into the petrosal sinuses causes different symptoms in patients.1 In cases that fistula drainage takes place into the inferior petrosal sinus, the orbital sign and symptoms are less severe.3-6 The clinical manifestations are usually unilateral and ipsilateral and are often vague at the onset of occurrence.7-9 Clinical manifestations are proptosis, exophthalmia, bruit, frontal headache and orbital pain, chemosis, extraocular palsy and diplopia, loss of visual acuity, 5th cranial nerve involvement and epistaxis.10,11 The 'gold standard' method for the diagnosis of CCF is cerebral angiography which is useful in identifying the fistula, evaluating venous drainage and assessing collateral circulation.12,13 To our knowledge, there is no report of blindness without exophthalmia as the presentation of CCF in the literature or the failure of CT- angiography and MRI evaluation for the diagnosis of CCF. We report a very rar case of CCF that presented with unilateral blindnes

 

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  • News Code : 278548
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