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Congress: ECR25
Poster Number: C-17316
Type: Poster: EPOS Radiographer (scientific)
DOI: 10.26044/ecr2025/C-17316
Authorblock: H. Hara1, H. Muraishi1, S. Maehira2, S. Mizukami1, T. Todoroki1, E. Ichikawa1, K. Nori1, H. Matsuda1, H. Mimura3; 1Sagamihara/JP, 2Isehara/JP, 3Kawasaki/JP
Disclosures:
Hidetake Hara: Nothing to disclose
Hiroshi Muraishi: Nothing to disclose
Shouta Maehira: Nothing to disclose
Shinya Mizukami: Nothing to disclose
Tatsuya Todoroki: Nothing to disclose
Erii Ichikawa: Nothing to disclose
Karin Nori: Nothing to disclose
Hibiki Matsuda: Nothing to disclose
Hidefumi Mimura: Nothing to disclose
Keywords: Emergency, Neuroradiology brain, Radiographers, CT, Experimental, Image manipulation / Reconstruction, Computer Applications-Virtual imaging, Diagnostic procedure, Imaging sequences, Ischaemia / Infarction, Kv imaging
Purpose     In Japan, cerebrovascular disease is the fourth cause of death and the first cause of bedridden patients [1]. Recently, cerebral stroke has been under serious consideration due to the westernization of the diets and an increase in geriatric diseases. At present, cerebral stroke is still one of the most important diseases to control and prevent (Fig.1). [fig 1]     To establish a method for image-based diagnosis of cerebral stroke, the authors developed a phantom that could correctly evaluate disease...
Read more Methods and materials 1. Development of phantom to cerebral infarction    Using a cerebral infarction phantom, which had been developed by the authors (Kyoto kagaku, JPN), an imitation disease with 34 HU was set to be visualized. The phantom, prepared with polyurethane resin and epoxy resin, the developed phantom mimicked the head shape and was composed of three sections: brain, cranium, and imitation disease. In the brain section, sphere-shaped imitation diseases (acute-stage cerebral infarction) of 30 mm in diameter were allocated in the...
Read more Results 1. VMI images    Fig.7 show the simulation results of VMI at 60, 65 and 70 keV, and compared to the 120 and 140 keV-based imeges. 60 and 65 keV shows a significant increase in contrast of the lesion. With an increase in tube current, the area of the cerebral infarction can be clearly delineated and its extent (infarcted area) can be confirmed due to the decrease in noise. [fig 7] 2. Imaging evaluation   The results of the d'2 analysis are shown...
Read more Conclusion      We were able to detect acute ischemic stroke at its early stage by using VMI in photon-counting detector CT to apply to a phantom. VMI in 140 kV-based images were high at around 66 keV in d'2, and 60 keV in CNRLO and FOM. Therefore, VMI in photon-counting detector CT images could be used clinically to judge whether thrombolytic therapy with the use of rt-PA is applicable to acute-stage cerebral infarction.AcknowledgmentsThis study was partially supported by grants the...
Read more References [1] Ministry of Health, Labour and Welfare secretariant statistics and information department, vital statistics. 2023. http://www.mhlw.go.jp/toukei/saikin/hw/jinkou/geppo/nengai23/index.html.[2] H.Hara, H.Muraishi, et al.: Dual-Energy CT Composition Images for Visualization of Acute Cerebral Stroke in Emergency. IFMBE Proc. Vol.39, 831-834, 2012. [3] H.Hara, T.Inoue, et al.: Development of an X-ray CT Phantom for Evaluation of Cerebral Apoplexy. St. Marianna Medical Journal. Vol.38, 9-16, 2010.[4] H.Hara, H.Muraishi, et al.: Multi-Detector CT of Acute Crebral Stroke in Emergency. Annual Meeting of the Radiological Society of North America...
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