Background and Objective: Meningiomas represent the most prevalent benign intracranial tumors, comprising 13- 26% of primary intracranial neoplasms. These tumors derive their blood supply from both extracranial and intracranial circulation. Over recent decades, pre-operative embolization (POE) has emerged as a potential adjunctive therapy to surgery, aiming to reduce tumor vascularity. Our study seeks to explore the potential correlation between the extent of devascularization following POE of meningiomas and intraoperative blood loss. Methods: This cross-sectional study involved nine meningioma patients at a tertiary hospital, involving chart review of patients across four years. These patients were referred for POE due to angiographic evidence of a hypervascular mass between January 2018 and January 2022. We collected demographic data, tumor characteristics (including location, size, and vascular supply), and intraoperative variables such as total operative time and blood loss. Statistical analyses aimed to uncover correlations between vascularization degree and various factors. Results: Our population consists predominantly of females (53.68%), with a mean age of 45.85 ± 13.65 years. Only one mortality was recorded (7.7%). Pre-operative embolization achieved devascularization in the majority (69.2%) of cases, with approximately two-thirds (66.7%) experiencing complete devascularization. Mean total operative time stood at 336.11 ± 301.88 minutes, with a mean post-operative blood loss of 985.56 ± 1013.72 milliliters. Additionally, for those with recorded recovery times, the mean recovery time was 14.32 ± 13.51 hours. : Mortality rates showed no association with sex, devascularization status, or number of feeding vessel zones. Furthermore, the extent of devascularization did not correlate with age, sex, number of feeding vessel zones, postoperative blood loss, total operative time, or recovery time (p >0.05). Conclusion In summary, this study represents a significant endeavor to elucidate factors influencing meningioma outcomes following pre-operative embolization. Despite limitations regarding patient numbers, our study offers valuable insights into operative parameters and embolization considerations for future analyses in our tertiary center.
Meningioma ; Radiology, Interventional

No abstract available.
*Diagnostic Imaging ; Human ; Radiology/*trends ; Radiology, Interventional ; Specialties, Medical

PURPOSE: To compare the lesion conspicuity of radiofrequency ablation (RFA) zones among MR sequences according to time in the normal rabbit liver. MATERIALS AND METHODS: RFA zones were created in 12 rabbit livers with a 17-gauge internally cooled electrode (1-cm active tip, 30 Watts, 3 minutes). Three rabbits were sacrificed immediately, three days, two weeks, and six weeks after the RFA procedure, respectively. Before sacrifice, T1-, T2-weighted images (WI), and gadolinium-enhanced (GE)-T1WI images were obtained. The lesion conspicuity of the RFA zone and the contrast-to-noise ratio (CNR) of the RFA zone to the liver parenchyma were analyzed and compared among the MR sequences according to time. RESULTS: On T1WI, the RFA zones were only clearly seen on acute phase. On T2WI, the RFA zones were clearly seen on all phases except the hyperacute phase. On GE T1WI, the RFA zones were clearly seen on all phases. The CNRs of the RFA zone to the liver parenchyma of GE-T1WI (8.1-12.4) were significantly higher than the CNRs of TIWI (1.6-2.7) and T2WI (1.7-6.3) on all phases (p < 0.05), but the visual lesion conspicuity between GE T1WI and T2WI were similar. CONCLUSION: On hyperacute phase, GE T1WI showed better lesion conspicuity of the RFA zone than T1WI and T2WI. On other phases, GE T1WI and T2WI showed similar lesion conspicuity.
Catheter Ablation* ; Electrodes ; Liver* ; Rabbits ; Radiology, Interventional

No abstract available.
Periodicals as Topic ; Publishing ; Radiology, Interventional ; Neuroimaging

Objective: To determine the inter-observer variation of ASPECTS among radiologists in the Philippine General Hospital (PGH), particularly between trainee radiologists and an expert reader.

Methods: Thirty (30) cranial CT scan studies of clinically-diagnosed, non-hemorrhagic stroke patients were analyzed by 9 trainee radiologists (3 fellows, and 3 senior and 3 junior residents) and one expert reader. Data analysis involved determining the levels of agreement within and across groups, and against the expert reader.

Results and Conclusion: There was moderate agreement (kappa = 0.60) between the junior residents and the expert reader, and substantial agreement between the senior residents and the expert reader (kappa = 0.70), as well as between the fellows and the expert reader (kappa = 0.63). Over-all, there was a substantial agreement between the trainee radiologists and the expert reader (kappa = 0.63). It can be concluded that the interpretation of trainee radiologists in PGH, particularly that of a senior resident or a fellow, is comparable with that of an expert reader, and can, thus, be useful in cases where an interpretation of a CT scan procedure in a clinically-diagnosed stroke patient is needed.

Guglielmi Detachable Coil(GDC) embolization is interventional radiology procedure for the management of aneurysm. The technique is recommended in case of patients' poor general condition, difficult surgical approach, but there is concerning about complications due to radiation exposure. We experienced a patient of radiation-induced dermatitis after GDC embolization. She presented with erythema, pus-like discharge, ulceration on scalp and right preauricular area, which symptoms was improved with medical managements. The authors report the case with pertinent literature review.
Aneurysm ; Dermatitis* ; Erythema ; Humans ; Radiodermatitis ; Radiology, Interventional ; Scalp ; Ulcer

Visceral artery pseudoaneurysms occur mostly as a result of inflammation and trauma. Owing to high risk of rupture, they require early treatment to prevent lethal complications. Knowledge of the various approaches of embolization of pseudoaneurysms and different embolic materials used in the management of visceral artery pseudoaneurysms is essential for successful and safe embolization. We review and illustrate the endovascular, percutaneous and endoscopic ultrasound techniques used in the treatment of visceral artery pseudoaneurysm and briefly discuss the embolic materials and their benefits and risks.
Aneurysm, False* ; Arteries* ; Inflammation ; Radiology, Interventional* ; Risk Assessment ; Rupture ; Ultrasonography

This paper introduces the operation principle, experimental research and clinical applications of an electromagnetic navigation system in interventional radiology and looks forward to the prospects for its clinical applications.
Electromagnetic Fields ; Radiology, Interventional ; instrumentation ; Surgery, Computer-Assisted

Deep vein thrombosis (DVT) is a condition that affects hundreds of thousands of patients each year and treated with anticoagulation therapy alone to stop propagation and embolization of venous thrombus but not remove it. Extensive clinical research over the last 40 years has improved the techniques to remove the thrombus from the affected veins and reduce the likelihood of developing post-thrombotic syndrome. These endovascular treatments includes catheter-directed thrombolysis and recently pharmacomechanical thrombectomy to rapidly fragment, lyse, and remove the thrombus from the affected veins resulting in short treatment time, and improved the quality of life of the patients. This article provides an overview of the interventions available for treating DVT.
Humans ; Quality of Life ; Radiology, Interventional ; Thrombectomy ; Thrombosis ; Veins ; Venous Thrombosis

Transcatheter embolization using absolute ethanol is a widely used technic in interventional radiology. Butits mechanism of action and embolization effect on various infusion speed are poorly understood. Authors performedan experimental study in rabbits to doccument the effect of absolute ethanol onvarious infusion rate. The resultsare as follows; 1. In high speed infusion group(>0.1ml/sec. n=13), 11 cases showed peripheral obstruction and 2 cases showed central obstruction. 2. In low speed infusion group(<0.1ml/sec. n=12), 4 cases showed peripheralobstruction and 8 cases showed central obstruction (p<0.02). 3. On follow-up angiography performed 4 weeks later(n=8), no demonstrable significant differences are found between two groups.
Angiography ; Ethanol ; Follow-Up Studies ; Rabbits ; Radiology, Interventional ; Renal Artery