發(fā)布時間：2018-05-13 11:46

  本文選題：體層攝影術(shù) + X線計(jì)算機(jī)�。� 參考：《中國醫(yī)學(xué)影像技術(shù)》2017年03期

【摘要】：目的評價迭代算法(AIDR 3D)和濾波反投影算法(FBP)聯(lián)合低劑量CT掃描評估腰椎間盤突出的價值。方法將150例患者隨機(jī)分為A~E 5組,每組30例,A~D組掃描管電壓為120kV,管電流分別為100mAs、50 mAs、30mAs、20mAs,E組管電壓為80kV、管電流為100mAs。對每組圖像分別進(jìn)行AIDR 3D和FBP重建,比較不同重建方法各組圖像的噪聲、SNR及CNR。并采用3分法對圖像質(zhì)量進(jìn)行主觀評分,評分≥2為診斷可接受圖像質(zhì)量,比較各組圖像椎間盤突出的顯示能力。結(jié)果在不同掃描條件下,采用AIDR 3D重建的圖像噪聲、SNR、CNR及椎間盤突出的顯示情況方面均優(yōu)于FBP。同一重建技術(shù)條件下,隨輻射劑量減低,噪聲升高、SNR和椎間盤突出顯示能力降低;除采用AIDR 3D的50mAs組CNR略低于30mAs組外,其余各組隨劑量減低,CNR降低;同一劑量下兩種重建技術(shù)采用降低管電流得到的圖像質(zhì)量優(yōu)于降低管電壓的方式。結(jié)論采用AIDR 3D重建方法聯(lián)合低劑量CT掃描診斷椎間盤突出有一定的價值。
[Abstract]:Objective to evaluate the value of iterative algorithm (AIDR 3D) and filter backprojection (FBP) combined with low dose CT scan in the evaluation of lumbar disc herniation. Methods 150 patients were randomly divided into two groups. The voltage of scanning tube was 120kV, the current of the tube was 100mAs50mAs-30mAs-20mAs-E group was 80kV and the current was 100mAs. Each group of images were reconstructed with AIDR 3D and FBP respectively. Three points method was used to evaluate the image quality. The score 鈮，

本文編號：1883011