探讨急性缺血性卒中患者“一站式CT”检查的辐射安全问题
目的评价急性缺血性卒中患者“一站式CT”检查的辐射剂量。方法34例急性缺血性卒中患者(发病时间在5~9h)进行了“一站式CT”检查。“一站式CT”检查包括CT平扫(un-enhancedCThead,NECT)、CT灌注(CTperfusion,CTP)及CT血管成像(CTangiography,CTA),记录扫描时机器显示的容积CT剂量指数(volumeCTdoseindex,CTDIv01)及剂量长度乘积(dose-lengthproduct,DLP),DLP乘以头部的有效剂量系数得到有效剂量。结果入组患者“一站式CT”检查的平均CTDIvoI为845.96±25.78mGy,平均DLP为...
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| Published in | 中国卒中杂志 Vol. 6; no. 9; pp. 689 - 694 |
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| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
首都医科大学附属北京天坛医院放射科,北京市神经外科研究所神经放射科,北京市,100050
2011
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1673-5765 |
| DOI | 10.3969/j.issn.1673-5765.2011.09.004 |
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| Summary: | 目的评价急性缺血性卒中患者“一站式CT”检查的辐射剂量。方法34例急性缺血性卒中患者(发病时间在5~9h)进行了“一站式CT”检查。“一站式CT”检查包括CT平扫(un-enhancedCThead,NECT)、CT灌注(CTperfusion,CTP)及CT血管成像(CTangiography,CTA),记录扫描时机器显示的容积CT剂量指数(volumeCTdoseindex,CTDIv01)及剂量长度乘积(dose-lengthproduct,DLP),DLP乘以头部的有效剂量系数得到有效剂量。结果入组患者“一站式CT”检查的平均CTDIvoI为845.96±25.78mGy,平均DLP为2748.92±129.25mGy,总有效剂量范围5.96--7.81rosy,平均为6.32±0.03mSv,其中NECT有效剂量为2.14±0.27mSv,CTP有效剂量为5.51mSv,CTA有效剂量为0.67+0.07mSv。2例患者CT平扫时出现移动伪影,补扫后导致此2例患者有效剂量较其他患者略高,分别为7.81mSv、6.71mSv。结论急性脑缺血性卒中患者“一站式CT”检查参数设置符合美国食品及药物管理局推荐标准,安全、合理,并且能够指导急性缺血性卒中患者进行溶栓治疗。 |
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| Bibliography: | 11-5434/R Objective To determine the radiation dose delivered during "one-stop-shop" computed tomography(CT) imaging for acute ischemic stroke. Methods "One-stop shop" CT examination was performed in 34 patients with symptoms of acute stroke less than 9 hours. The Protocol includes an un-enhanced CT(NECT) head, CT perfusion(CTP), and CT angiography(CTA) from cranial base to vertex. The weighted volume CT dose index(CTDIvol) and dose-length products(DLP) were recorded during the CT scanning. Effective doses for each examination were calculated using the DLP and normalized values of effective dose per DLP appropriate for the head regions imaged. Results In 34 patients, mean CTDIvol was 845.96±23.78 mGy; mean DLP was 2748.92±129.25 mGy~cm; the effective doses ranged from 5.96 to 7.81 mSv, mean effective dose was 6.32±0.03 mSv. Largest contribution to effective dose was the CTP with a mean effective dose of 3.51 mSv. Mean effective doses for the NECT, CTA were 2.14±0.27 mSv, 0.67±0.07 mSv, respectively. Conclusion |
| ISSN: | 1673-5765 |
| DOI: | 10.3969/j.issn.1673-5765.2011.09.004 |