xbox高清视频线,国产精品偷伦视频免费观看了,中文字幕在线播放,亚瑟 中文字幕

關鍵詞: 類型:
  首頁 > 臨床報道 > 正文  

多層螺旋CT 計算心室容積的準確性及最佳層厚選擇

【?2008-09-01 發布?】 臨床報道  

美迪網領先的醫療器械電子商務平臺

多層螺旋CT 計算心室容積的準確性及
最佳層厚選擇
崔煒 Takeshi Kondo Hirofumi Anno 郭玉印 Takahisa Sato Masayoshi Sarai
Hitoshi Shinozaki Satoshi Kakizawa Atsushi Sugiura Keita Oshima
Kazuhiro Katada Hitoshi Hishida
【摘要】 目的 ( 1) 確定Simpson 方法計算心室容積的最佳層厚; ( 2) 評價多層螺旋CT 計算心
室容積的準確性。方法 采用多層螺旋CT( 東芝Aquilion) 掃描系統對14 個人的左室鑄型和15 個右
室鑄型進行掃描。分別以2. 0、3. 5、5. 0、7. 0 及10. 0 mm 層厚重建左、右心室短軸多平面重組
( multiplanar reformatted image, MPR) 圖像。采用標準Simpson 法計算左、右心室鑄型的容積。心室鑄
型的實際容積通過鑄型排除水的容量來計算。結果 各層厚計算的心室容積均高估相應心室的實際
容積[ 左心室高估值介于( 3. 21 ±5. 95) ml 至( 12. 58 ±8. 56) ml 之間, 右心室高估值介于( 10. 22 ±
8. 45) ml 至( 23. 91 ±12. 24) ml 之間] 。各層厚計算的心室容積均與相應的實際心室容積高度相關
( 左心室r 值均> 0. 97, 右心室r 值均> 0. 95) ; 心室容積的高估程度與選擇的層厚呈顯著正相關( 左
心室r = 0. 998, 右心室r = 0. 996) 。當層厚降至5 mm 時, 計算的心室容積對實際容積的高估值與
2 mm層厚相比不再差異有統計學意義。結論 采用多排Simpson 法計算左、右心室容積時, 5 mm 層
厚是最有效率的層厚。MSCT 可以準確計算左、右心室容積。
【關鍵詞】 體層攝影術, X 線計算機; 心臟容量; 血液動力學
The accur acy of ventr icular volume measur ement and the opt ima l slice thickness by using mult islice
helica l computed tomogr aphy CUI Wei* , Takeshi Kondo, Hirofumi Anno, GUO Yu-yin, Takahisa
Sato, Masayoshi Sa rai, Hitoshi Shinozaki, Satoshi Kakizawa, Atsushi Sugiura , Keita Oshima, Kazuhiro
Katada , Hitoshi Hishida. * Depa rtment of Ca rdiology, The Second Hospital of Hebei Medical University,
Shijia zhua ng 050000, China
【Abstra ct 】 Object ive To determine the optimal slice thickness for ventricular volume measurement
by tomographic multislice Simpson′s method and to evaluate the accuracy of ventricular volume measured by
multislice helical computed tomography ( MSCT) in human ventricular casts. Methods Fourteen human
left ventricular ( LV) and 15 right ventricular ( RV) casts were scanned with MSCT scanner by using a
scanning protocol similar to clinical practice. A series of LV and RV short-axis images were reconstructed
with slice thickness of 2 mm, 3. 5 mm, 5 mm, 7 mm, and 10 mm, respectively. Multislice Simpson′s
method was used to calculate LV and RV volumes and true cast volume was determined by water
displacement. Result s The true LV and RV volumes were ( 55. 57 ±28. 91) ml, and ( 64. 23 ±24. 51 )
ml, respectively. The calculated volumes from different slice thickness ranged from ( 58. 78 ±28. 93) ml to
( 68. 15 ±32. 57 ) ml for LV casts, and ( 74. 45 ±27. 81 ) ml to ( 88. 14 ±32. 91) ml for RV casts,
respectively. Both the calculated LV and RV volumes correlated closely with the corresponding true volumes
( all r > 0. 95, P < 0. 001) , but overestimated the corresponding true volume by ( 3. 21 ±5. 95) to ( 12. 58 ±
8. 56) ml for LV and ( 10. 22 ±8. 45) to ( 23. 91 ±12. 24) ml for RV ( all P < 0. 01) . There was a close
correlation between the overestimation and the selected slice thickness for both LV and RV volume
measurements ( r = 0. 998 and 0. 996, P < 0. 001) . However, when slice thickness was reduced to 5. 0 mm,
the overestimation became nonsignificant for slice thickness through 2. 0 mm to 5. 0 mm, and also for both
LV and RV volume measurements . Conclusion Both LV and RV volumes can be accurately calculated with
MSCT. A 5 mm slice thickness is enough and most efficient for accurate measurement of LV and RV
volume.
【Key wor ds】 Tomography, X-ray computed; Cardiac volume; Hemodynamics

多層螺旋CT 計算心室容積的準確性及--心血管.rar

網友評論
共計 0 條      
 
我要評論
匿名發表 昵稱: Email: 驗證碼: 點擊可刷新
 
    

合作支持:中華醫學會 | 中華醫院管理學會 | 國家食品藥品監督管理家用護理器械商城 | 國藥勵展展覽有限責任公 | 醫學裝備協會
刊登廣告 | 友情鏈接 | 廣告代理商加盟 | 關于美迪 | 法律聲明 | 隱私保護 | 網站地圖
把美迪網放進收藏夾  把美迪醫療網介紹給我的朋友  給美迪醫療網留言
美迪醫療網廣告業務聯系:021-51601230 產品咨詢業務聯系:021-51601230 傳真:021-56532303    美迪醫療網業務咨詢
互聯網藥品信息服務許可證:(滬)-經營性-2009-0003   中華人民共和國電信與信息服務業務經營許可證:(滬)B2-20090029 滬ICP備14001091號-8
 
公安備案號 31010602000199 醫療器械經營許可證: 滬靜藥監械經營許20210003號 第二類醫療器械經營備案憑證: 滬靜藥監械經營備20220042號
營業執照:統一社會信用代碼91310108676284138X互聯網藥品信息服務資格書:(滬)-非經營性-2023-0081
消防排煙風機 華創商務網
美迪醫療網廣告業務聯系:021-51601230  產品咨詢業務聯系:021-51601230 傳真:021-56532303   美迪醫療網產品咨詢 本QQ僅咨詢廣告和會員業務,不咨詢產品和藥品等業務美迪醫療網推廣業務咨詢