CAJ | 학술논문

目的探讨心脏三维重塑技术对减少心脏生理性运动伪影、提高心肌血流灌注显像的作用.方法回顾性分析2011年3月至2011年8月首次就诊者20名.其中8名根据年龄、临床症状、ECG、CTCA等资料排除其患冠心病可能性,12名在2周内接受CAG检查,结果均为阴性.行99Tcm-MIBI常规MPI,通过心脏三维重塑专用软件对心肌断层图像进行三维重塑处理.由2位有经验的核医学科医师在双盲情况下,通过目测结合极坐标靶心图行定量分析,获得心肌核素稀疏或缺损的节段数以及心肌各壁的放射性计数百分比,采用配对t检验比较三维重塑前后图像差异.结果所有受检者中,心脏非三维重塑模式可见10个放射性稀疏节段,而三维重塑模式仅见4个稀疏节段.采用三维重塑模式可减少心尖和前壁放射性稀疏伪影.非三维重塑模式心尖和前壁放射性计数百分比分别为(78.05 ±0.83)％、(74.50±2.35)％,三维重塑后分别为(84.05±1.32)％、(81.10±1.45)％,2种处理模式比较差异有统计学意义(t心尖=11.854,t前壁 =9.413,P均＜0.05).前侧壁、后侧壁、前间隔、后间隔、下壁和后壁非三维重塑模式与三维重塑模式放射性计数比较差异无统计学意义(t值分别为1.876、1.330、1.690、2.014、0.167和1.868,P均＞0.05).结论心脏三维重塑技术可以有效减少心脏生理性运动引起的心脏伪影,其图像质量明显优于非三维重塑模式.
목적 탐토심장삼유중소기술대감소심장생이성운동위영、제고심기혈류관주현상적작용.방법 회고성분석2011년3월지2011년8월수차취진자20명.기중8명근거년령、림상증상、ECG、CTCA등자료배제기환관심병가능성,12명재2주내접수CAG검사,결과균위음성.행99Tcm-MIBI상규MPI,통과심장삼유중소전용연건대심기단층도상진행삼유중소처리.유2위유경험적핵의학과의사재쌍맹정황하,통과목측결합겁좌표파심도행정량분석,획득심기핵소희소혹결손적절단수이급심기각벽적방사성계수백분비,채용배대t검험비교삼유중소전후도상차이.결과 소유수검자중,심장비삼유중소모식가견10개방사성희소절단,이삼유중소모식부견4개희소절단.채용삼유중소모식가감소심첨화전벽방사성희소위영.비삼유중소모식심첨화전벽방사성계수백분비분별위(78.05 ±0.83)％、(74.50±2.35)％,삼유중소후분별위(84.05±1.32)％、(81.10±1.45)％,2충처리모식비교차이유통계학의의(t심첨=11.854,t전벽 =9.413,P균＜0.05).전측벽、후측벽、전간격、후간격、하벽화후벽비삼유중소모식여삼유중소모식방사성계수비교차이무통계학의의(t치분별위1.876、1.330、1.690、2.014、0.167화1.868,P균＞0.05).결론 심장삼유중소기술가이유효감소심장생이성운동인기적심장위영,기도상질량명현우우비삼유중소모식.
Objective To explore the value of cardiac morphing in reducing cardiac motion artifacts and improving the quality of MPI.Methods In this retrospective study,20 healthy volunteers underwent MPI with cardiac morphing at initial consultation during March 2011 to August 2011.Coronary artery disease (CAD) was excluded in 8 patients according to their age,clinical features,ECG and CTCA.CAD was excluded by CAG in 12 patients.The number of sparse segments and the percentage of average count at the myocardial wall were obtained by 99Tcm-MIBI MPI.Cardiac morphing was performed with the workstation of GE Discovery D670 SPECT.Two experienced nuclear medicine physicians,who were blinded to each other,measured the percentage of average count in the polar bulls-eye map.The difference was compared by paired t-test.Results A total of 10 sparse segments were identified without a morphing mode,while 4 sparse segments were identified using a morphing mode.The artifacts were reduced in apex and anterior walls using the morphing mode.The percentages of average count in the apex and anterior walls were ( 78.05 ± 0.83 ) ％ and ( 74.50 ± 2.35 ) ％,respectively,without a morphing mode and ( 84.05 ± 1.32 ) ％and (81.10 ± 1.45 )％,respectively,with a morphing mode.Their differences were statistically significant ( apex:t =11.854 ; anterior wall:t =9.413,both P ＜ 0.05 ).There was no significant difference between these modes in the anterolateral,posterolateral,anterior and posterior walls,as well as inferior and posterior septa (t =1.876,1.330,1.690,2.014,0.167,1.868,all P ＞ 0.05 ).Conclusion Cardiac morphing can effectively reduce cardiac motion artifacts and improve the image quality of MPI.