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Congress: ECR26
Poster Number: C-10288
Type: Poster: EPOS Radiographer (scientific)
Authorblock: S. Kawauchi1, K. Chida2, Y. Hamada1, T. Moritake3, W. Tsuruta4; 1Minato-Ku/JP, 2Sendai/JP, 3Chiba/JP, 4Tokyo/JP
Disclosures:
Satoru Kawauchi: Nothing to disclose
Koichi Chida: Nothing to disclose
Yusuke Hamada: Nothing to disclose
Takashi Moritake: Nothing to disclose
Wataro Tsuruta: Nothing to disclose
Keywords: Head and neck, Neuroradiology brain, Radioprotection / Radiation dose, Catheter arteriography, Dosimetry, Embolisation, Aneurysms
Purpose Neuroendovascular therapy (NET) has become a standard minimally invasive approach for the treatment of intracranial aneurysms. Despite its clinical advantages, NET requires extensive use of fluoroscopy and digital subtraction angiography (DSA), resulting in relatively high radiation exposure compared with other interventional procedures. Radiation-induced skin injury such as epilation is therefore a major safety issue, especially considering that the peak skin dose (PSD) is strongly influenced by cumulative fluoroscopy and repeated DSA exposures(1, 2) (figure1 and figure2). [fig 1] [fig 2] In clinical practice, identifying the...
Read more Methods and materials Study PopulationA retrospective review was performed on 183 patients who underwent NET for intradural aneurysms between May 2019 and February 2023. A total of 194 aneurysms were treated.All procedures were conducted under institutional review board approval (No. 1976), and informed consent was obtained.Endovascular ProcedureAll NET procedures were conducted using a biplane flat-panel detector system (Azurion7 B20/15; Philips Healthcare). The lateral X-ray tube was positioned on the patient’s left side. Tube voltage and current were automatically modulated by the automatic brightness...
Read more Results Patient and Aneurysm Characteristics (table 1 and table 2) 183 patients (68.3% female), mean age 62.0 ± 12.8 years. 155 aneurysms (79.4%) in the anterior circulation; 40 (20.6%) in the posterior circulation. 171 patients (90.0%) had a single aneurysm; 12 had multiple. Intracranial stents such as neck-bridge stent for coil embolization and flow diverter stent were used in 106 patients (57.9%). Radiation Dose Parameters (table 1) Mean TFT: 44.2 ± 23.1 min Mean Ka,r: 2.17 ± 1.18 Gy Mean PKA: 153.8 ± 103.2 Gy·cm² Mean Ka,r ratio: 1.92 ± 0.64 Mean...
Read more Conclusion This study demonstrated that the occipital region is the predominant PSD location during NET for unruptured intracranial aneurysms. Non-stent procedures and a high Ka,r ratio were identified as key procedural predictors associated with occipital PSD distribution.Our previous work showed that PSD measured using RPLDs exhibits a strong correlation with Ka,r and PKA in both diagnostic cerebral angiography and NET, enabling accurate prediction of PSD value (6-9). In contrast, the identification of PSD location has not been systematically investigated, largely because...
Read more References Chida, K., Inaba, Y., Saito, H., Ishibashi, T., Takahashi, S., Kohzuki, M. and Zuguchi, M. Radiation dose of interventional radiology system using a flat-panel detector. AJR Am J Roentgenol. 193(6), 1680–5 (2009). Kato, M., Chida, K., Ishida, T., Toyoshima, H., Yoshida, Y., Yoshioka, S., Moroi, J. and Kinoshita, T. Occupational Radiation Exposure of the Eye in Neurovascular Interventional Physician. Radiat Prot Dosimetry. 185(2), 151–156 (2019). Hayakawa, M., Moritake, T., Kataoka, F., Takigawa, T., Koguchi, Y., Miyamoto, Y., Akahane, K. and Matsumaru, Y....
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