64排螺旋CT冠状动脉成像时不同对比剂注射方案的特点2012,10(2)125-128

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64排螺旋CT冠状动脉成像时不同对比剂

注射方案的特点

黎雪琴,罗红亮,刘文婷.’

(武警湖北总队医院放射科,湖北武汉430061)

[摘要]目的:探讨64排螺旋cT冠状动脉成像时不同对比剂注射方案的特点。方法:冠状动脉cT成像患者297例。随机分为3组。A组,双时相组,97例。第1时相注射对比剂60~70ml{第2时相注射生理盐水20ml。B组,3时相组,又分B1组及B2组。B1组lol例.第l时相注射对比剂40~50ml;第2时相对比剂与生理盐水按6:4比例混合注射20一30mI;第3时相注射生理盐水20ml。B2组99例,第l时相及第3时相注射方案同B1组,第2时相对比剂与生理盐水混合比倒为7:3,注射20~30m1。注射速率4.5~5.om1/s。评价内容包括冠状动脉成像质量、上腔静脉及右心室伪影、右心室壁及肺动脉显示情况,所得结果进行统计学处理。结果:3组间,冠状动脉成像质量差异无统计学意义。上腔静脉及右心室伪影A组与B组间差异有统计学意义,A组伪影较明显。B1组与B2组间差异无统计学意义。右心事壁评价A组最佳.与B组间差异有统计学意义。B2组优于B1组,两者差异有统计学意义。肺动脉显示A组最佳,与B组间差异有统计学意义。B组中。B2组肺动脉显示率约63.64%,高于B1组。结论:3种注射方案均可提供良好的冠状动脉图像。双时相注射可较好显示右心窜壁及肺动脉.但上腔静脉及右心室伪影较明显。6:4比例的3时相注射上腔静脉及右心摩伪影最小,但右心室壁显示较差,基本不能观察肺动脉。7:3比例的3时相注射方案上腔静脉及右心室伪影小,可进行右心室评价,但肺动脉显影不可靠。可根据临床需求选择不同的注射方案。

[关键词]体层摄影术,x线计算机{冠状血管造影术;对比剂[中图分类号]R814.42

[文献标识码]ADOI:10.3969/j.issn.1672一0512.2012.02.010

The

virt眦of怕ch咖讯哦agenti哪eni伽schememcomnaryanery粕gi嚷mphywith64-det舵tormw

spjHlCT

LjX“£g锄,LUo

Ho栉gZ缸挖g,L儿,WP行“犯g.DepartmentofRadiology,HubeiProvincialCorpsHospital,ChinesePeopl—sArmedPoliceFbrces,Wuhan,430061,China.

[Abstr即1]obj∞Hve:To

explorethevirtueof朗ch

contrast

agent

injectionschemein

coronaryartery

angiographywith64一de—

tector

mwspiralCT.MetIlods:Atotalof297patientsundergoing

corona。y

angiographyby64一detectorrowspiralCTweredi-

videdintothree

groups.GmupA(twophases,97patients)werejnjected60—70ml

contrastagentfirst,thenfoIlowedbyZ0mlsa—

lineflush.GroupB1(threeinjectionphases,101patients)wereinjected40一50ml

contrast

agentfirst,then

injected20一30ml

con—

tras卜saIinemixture

at

6:4

ratio。th饥followedby20mlsalineflushGroupB2(threephases,99patients)wereilljected40一50ml

contrast

agentfirst。theninjected20—30mlcontra8t-8aIinemixture

at

7:3

ratio,thenfollowed

by20

mlsaline

flush.Injection

speedwas4.5—5.Oml/s.Theimagequalityofcoroflary,theartifactsofsuperiorve船cavaandrightventricIe,thevisualization

of

the

wallofrightventricleandpulmonary

arterywere

evaluated.R咖Its:The

differenceoftheimagequalityofcoronarybe—

tweengroupA,groupB1andgroupB2wasnot

significant.Theartifactsofsuperjorvena

cava

andrightventricleingroupA

wasmoreobviousthan

group

B,buttherewas

no

significantdIfferenceingroupB1andgroupB2.GroupAwasthebestinthe

visualizationoftherightventriclewall,andgroupB2wasbetterthan“atofgroupB1.GroupAwasbetterinthevisualization

ofpuImonaryarterythanthatofgroup&Thedisplayrate

ofpulmonaryarteryinGroupB2was

63.64% betterthanthatofgroup

B1.ConcI吣ion:In

coronary

cTA,imagequalityof

coronaryartery

wasalmostsameineach

injectionplan.Twophasein—

plan

can

pmvideclearvisualizationofthewallofrightventricleandpulmonary8rtery,buttheartifactsofsuperior

vena

cava

andrightventriclewasobvious.A

contrast-saIinemixture

at

6:4ratioafter

contrastbolus

can

provideleastartifactsofsu—

perior

vena

cava

andrightventricle,butthewallofrightventricleandpulmonaryarterycould

not

bevisualizedclearly.Acon—

tras卜salinemixtureat

7:3ratioaftercontrastbolus

can

provide1eastartifactsofsuperior

vena

cava

andright

ventricIe,a“clear

visualizationof

thewallofrightventricle’butpulmonaryanerycouldIlot

be

vis岫li北dckarlyin

majorityofcases.Weshould

selectthesuitableinjectionplanaccofding

to

thecIinicneeds.

LKeywords]tomography,x.-ny

computed;coronary

angbgraphy;contrast

media

64排螺旋CT冠状动脉成像的临床应用越来越广泛,在获得优质冠状动脉影像的同时,还能评价心脏形态和功能,了解肺动脉有无病变。本研究探[作者简介]黎雪琴(1962一)。女。广东湛江人。主任医师,研究讨64排螺旋CT冠状动脉成像时不同注射方案的方向:CT、MRl诊断。

特点。

万方数据

jection

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