Chest CT quantitative parameters in patients with acute exacerbation of chronic obstructive pulmonary disease:Correlations with blood eosinophil level

Objective To observe the correlations of chest CT quantitative parameters in patients with acute exacerbation of chronic obstructive pulmonary disease(AECOPD)with blood eosinophil(EOS)level.Methods Chest CT data of 162 AECOPD patients with elevated eosinophils were retrospectively analyzed.The patients were divided into low EOS group(n=105)and high EOS group(n=57)according to the absolute counting of blood EOS.The quantitative CT parameters,including the number of whole lung bronchi and the volume of blood vessels,low-attenuation area percentage(LAA%)of whole lung,of left/right lung and each lobe of lung,as well as the luminal diameter(LD),wall thickness(WT),wall area(WA)and WA percentage of total bronchial cross-section(WA%)of grade 3 to 8 bronchi were compared between groups.Spearman correlations were performed to analyze the correlations of quantitative CT parameters with blood EOS level.Results LAA%of the whole lung,of the left/right lung and each lobe of lung,as well as of the upper lobe of right lung LD grade 4,middle lobe of right lung WT grade 5,upper lobe of right lung WA grade 4,middle lobe of right lung WA grade 5 and lower lobe of left lung WA grade 3 in low EOS group were all higher than those in high EOS group(all P<0.05).Except for the upper lobe of right lung LD grade 4,the above quantitative CT indexes being significant different between groups were all weakly and negatively correlated with blood EOS level(r=-0.335 to-0.164,all P<0.05).Conclusion Chest CT quantitative parameters of AECOPD patients were correlated with blood EOS level,among which LAA%,a part of WT and WA were all weakly negatively correlated with blood EOS level.

The clinical application of multi-slice spiral CT angiography in abdominal aortic disease

Objective： To evaluate the clinical application of multi-slice spiral CT angiography（MSCTA） in the assessment of abdominal aortic disease. Methods： Fifty-four patients underwent multi-slice spiral CT angiography of abdomen. Contrast agent （Omnipaque 300 I g/L） 1.5 ml/kg was injected and the injection rate was 3 ml/s. The delay time was determined by bolus tracking technique, Tll level abdominal aorta was set as the target vessel and the threshold was 180-200Hu, slice width was 3mm and with a pitch of 4-6. Original data were transferred to working-station to perform functional reconstruction. Results： Ten cases were normal, twenty-eight cases were abdominal aortic aneurysms, five abdominal aortic dissecting aneurysms （Debakay type Ⅲ） and eleven aortic sclerosis. SSD showed the body of aneurysm and the relationship between aneurysm and adjacent blood vessel, MIP better displayed calcification of blood vessel wall and condition of the stent, MPR demonstrated true and false lumen, rapture site of abdominal aorta intima and mural thrombus. Conelusion： MSCTA axial and reconstruction image can show the extent of abdominal aortic disease and the relationship with adjacent blood vessels. It is a safe, simple and non-invasive examination method.

Values of high-resolution computed tomography and pulmonary function tests in managements of patients with chronic hepatitis C virus infection

AIM:To investigate pulmonary involvement via pulmonary function tests (PFT) and high-resolution computed tomocjraphy (HRCT) in patients with chronic hepatitis C virus (HCV) infection. METHODS:Thirty-four patients with chronic HCV infection without diagnosis of any pulmonary diseases and 10 healthy cases were enrolled in the study,PFT and HRCT were performed in all cases. RESULTS:A decrease lower than 80% of the predicted value was detected in vital capacity in 9/34 patients,in forced expiratory volume in one second in 8/34 patients,and in forced expiratory flow 25-75 in 15/34 patients,respectively.Carbon monoxide diffusing capacity (DLCO) was decreased in 26/34 patients.Findings of interstitial pulmonary involvement were detected in the HRCT of 16/34 patients.Significant difference was found between controls and patients with HCV infection in findings of HRCT (X^2=4.7,P=0.003).Knodell histological activity index (KHAI) of 28/34 patients in whom liver biopsy was applied was 9.0±4.7.HRCT findings,PFT values and DLCO were not affected by KHAI in patients with HCV infection.In these patients,all the parameters were related with age. CONCLUSION:We suggest that chronic hepatitis C virus infection may cause pulmonary interstitial involvement without evident respiratory symptoms.

Triple rule-out computed tomography angiography:Evaluation of acute chest pain in COVID-19 patients in the emergency department

BACKGROUND The aim of this study was to define clinical evidence supporting that triple ruleout computed tomography angiography(TRO CTA)is a comprehensive and feasible diagnostic tool in patients with novel coronavirus disease 2019(COVID-19)who were admitted to the emergency department(ED)for acute chest pain.Optimizing diagnostic imaging strategies in COVID-19 related thromboembolic events,will help for rapid and noninvasive diagnoses and results will be effective for patients and healthcare systems in all aspects.AIM To define clinical evidence supporting that TRO CTA is a comprehensive and feasible diagnostic tool in COVID-19 patients who were admitted to the ED for acute chest pain,and to assess outcomes of optimizing diagnostic imaging strategies,particularly TRO CTA use,in COVID-19 related thromboembolic events.METHODS TRO CTA images were evaluated for the presence of coronary artery disease,pulmonary thromboembolism(PTE),or acute aortic syndromes.Statistical analyses were used for evaluation of significant association between the variables.A two tailed P-value<0.05 was considered statistically significant.RESULTS Fifty-three patients were included into the study.In 31 patients(65.9%),there was not any pathology,while PTE was diagnosed in 11 patients.There was no significant relationship between the rates of pathology on CTA and history of hypertension.On the other hand,the diabetes mellitus rate was much higher in the acute coronary syndrome group,particularly in the PTE group(8/31=25.8%vs 6/16=37.5%,P=0.001).The rate of dyslipidemia was significantly higher in the group with pathology on CTA while compared to those without pathology apart from imaging findings of the pneumonia group(62.5%vs 38.7%,P<0.001).Smoking history rates were similar in the groups.Platelets,D-dimer,fibrinogen,C-reactive protein,and erythrocyte sedimentation rate values were higher in COVID-19 cases with additional pathologies.CONCLUSION TRO CTA is an effective imaging method in evaluation of all thoracic vascular systems at once and gives accurate results in COVID-19 patients.

Utility of Spiral Computed Tomography in the Study of Dislocation of Cricoarytenoid Joint

The cricoarytenoid relationship presented with spiral computed tomography was demonstrated and the reconstruction of arytenoid dislocation was presented by using multiplanar reconstruction algorithms. Fifteen patients with arytenoid dislocation documented by fiberoptic laryngoscopy and strobovideolaryngoscopy and 10 normal persons were displayed by spiral computed tomography (CT). A making design of our own had been used to diagnose arytenoid dislocation on axial CT image. Results showed that dislocation of cricoarytenoid joint was consistently demonstrated on several of the overlapping thin axial reconstructions in each of the 15 patients, in whom asymmetry of the bilateral cricoarytenoid joints was noted on axial images. It was found that on the glottic-fissure level the basal angle on abnormal side was larger in 8 patients than that on the normal side and smaller in 7 patients in patient group, whereas right basal angle was equal to the left in 8 subjects, except 2 in control group. There was statistically significant difference in the number of the equal to two basal angles of glottic fissure between control group and patient group (P<0.025). High-quality sagittal and coronal reconstructive images often were helpful in confirming or clarifying the complex arytenoid orientations. The findings that two-side basal angle was not equal in triangle of glottic fissure can be used as an objective parameter to diagnose arytenoid dislocation. Spiral CT is a useful adjunct in the diagnosis and treatment of dislocation of cricoarytenoid joint.

Impact of X-radiation in the management of COVID-19 disease

Coronaviruses are a diverse group of viruses that infect both animals and humans.Even though the existence of coronavirus and its infection to humans is not new,the 2019-novel coronavirus(nCoV)caused a major burden to individuals and society i.e.,anxiety,fear of infection,extreme competition for hospitalization,and more importantly financial liability.The nCoV infection/disease diagnosis was based on non-specific signs and symptoms,biochemical parameters,detection of the virus using reverse-transcription polymerase chain reaction(RTPCR),and X-ray-based imaging.This review focuses on the consolidation of potentials of X-ray-based imaging modality[chest-X radiography(CXR)and chest computed tomography(CT)]and low-dose radiation therapy(LDRT)for screening,severity,and management of COVID-19 disease.Reported studies suggest that CXR contributed significantly toward initial rapid screening/diagnosis and CT-imaging to monitor the disease severity.The chest CT has high sensitivity up to 98%and low specificity for diagnosis and severity of COVID-19 disease compared to RT-PCR.Similarly,LDRT compliments drug therapy in the early recovery/Less hospital stays by maintaining the physiological parameters better than the drug therapy alone.All the results undoubtedly demonstrated the evidence that X-ray-based technology continues to evolve and play a significant role in human health care even during the pandemic.

Bone diseases in rabbits with hyperparathyroidism: computed tomography, magnetic resonance imaging and histopathology

Background Hyperparathyroidism （HPT） occurs at an early age and has a high disability rate. Unfortunately, confirmed diagnosis in most patients is done at a very late stage, when the patients have shown typical symptoms and signs, and when treatment does not produce any desirable effect. It has become urgent to find a method that would detect early bone diseases in HPT to obtain time for the ideal treatment. This study evaluated the accuracy of high field magnetic resonance imaging （MRI） combined with spiral computed tomography （SCT） scan in detecting early bone diseases in HPT, through imaging techniques and histopathological examinations on an animal model of HPT. Methods Eighty adult rabbits were randomly divided into two groups with forty in each. The control group was fed normal diet （Ca：P = 1：0.7）; the experimental group was fed high phosphate diet （Ca：P = 1：7） for 3, 4, 5, or 6-month intervals to establish the animal model of HPT. The staging and imaging findings of the early bone diseases in HPT were determined by high field MRI and SCT scan at the 3rd, 4th, 5th and 6th month. Each rabbit was sacrificed after high field MRI and SCT scan, and the parathyroid and bones were removed for pathological examination to evaluate the accuracy of imaging diagnosis. Results Parathyroid histopathological studies revealed hyperplasia, osteoporosis and early cortical bone resorption. The bone diseases in HPT displayed different levels of low signal intensity on T1WI and low to intermediate signal intensity on T2WI in bone of stage 0, Ⅰ, Ⅱ or Ⅲ, but showed correspondingly absent, probable, osteoporotic and subperiosteal cortical resorption on SCT scan. Conclusion High field MRI combined with SCT scan not only detects early bone diseases in HPT, but also indicates staging, and might be a reliable method of studying early bone diseases in HPT.

Differential diagnosis of coronavirus disease 2019 from community-acquired-pneumonia by computed tomography scan and follow-up

Objective Coronavirus disease 2019(COVID-19)is currently the most serious infectious disease in the world.An accurate diagnosis of this disease in the clinic is very important.This study aims to improve the differential ability of computed tomography(CT)to diagnose COVID-19 and other community-acquired pneumonias(CAPs)and evaluate the short-term prognosis of these patients.Methods The clinical and imaging data of 165 COVID-19 and 118 CAP patients diagnosed in seven hospitals in Anhui Province,China from January 21 to February 28,2020 were retrospectively analysed.The CT manifestations of the two groups were recorded and compared.A correlation analysis was used to examine the relationship between COVID-19 and age,size of lung lesions,number of involved lobes,and CT findings of patients.The factors that were helpful in diagnosing the two groups of patients were identified based on specificity and sensitivity.Results The typical CT findings of COVID-19 are simple ground-glass opacities(GGO),GGO with consolidation or grid-like changes.The sensitivity and specificity of the combination of age,white blood cell count,and ground-glass opacity in the diagnosis of COVID-19 were 92.7 and 66.1%,respectively.Pulmonary consolidation,fibrous cords,and bronchial wall thickening were used as indicators to exclude COVID-19.The sensitivity and specificity of the combination of these findings were 78.0 and 63.6%,respectively.The follow-up results showed that 67.8%(112/165)of COVID-19 patients had abnormal changes in their lung parameters,and the severity of the pulmonary sequelae of patients over 60 years of age worsened with age.Conclusions Age,white blood cell count and ground-glass opacity have high accuracy in the early diagnosis of COVID-19 and the differential diagnosis from CAP.Patients aged over 60 years with COVID-19 have a poor prognosis.This result provides certain significant guidance for the diagnosis and treatment of new coronavirus pneumonia.

Interrupted aortic arch diagnosed by ECG-gated multi-slice computed tomography angiography: a case report

Interrupted aortic arch （IAA） is a rare congenital cardiovascular disease with major intracardiac defects and always with multisystem non-cardiac malformations. It occurs in 1 ： 10,000 births, and about 1% of the patients with congenital heart defects. Therefore, it is important that we make a good diagnosis and accurate evaluation of their morphologic conditions before a heart operation. We presented a case of IAA diagnosed by ECGgated multi-slice computed tomography （MSCT） angiography.

Prevalence of Bicuspid Aortic Valve in Turner Syndrome Patients Receiving Cardiac MRI and CT: A Meta-Analysis

Turner syndrome(TS)is a rare disorder affecting 25–50 in 100000 female newborns.Bicuspid aortic valve(BAV)is assumed to be the most common congenital heart defect(CHD)in TS.In literature,reported BAV prevalence in TS ranges between 14%and 34%.The specific BAV prevalence in TS is still unknown.The aim of this study was to give a more precise estimation of BAV prevalence in TS by conducting a meta-analysis of TS-studies,which detected BAV by either cardiac magnetic resonance imaging(MRI)or cardiac computed tomography(CT).We searched PubMed,Cochrane Library,and Web of Science databases to collect observational studies including the prevalence of BAV identified by cardiac MRI or cardiac CT in TS patients up to June 4th,2021.After screening for inclusion,data extraction,and quality assessment by two independent reviewers,the meta-analysis was performed with R 4.1.1 software.Results are shown as proportion and weighted mean difference with 95%confidence intervals(95%CI).In total,11 studies involving 1177 patients were included.Pooled data showed that the prevalence of BAV in TS patients was 23.7%(95%CI:21.3%to 26.1%).No high heterogeneity was found between the included studies.The current meta-analysis reveals that BAVcan be detected in 23.7%of TS patients receiving cardiac MRI or cardiac CT.Therefore,BAV can be considered as the most common CHD in TS.Compared to TTE,cardiac MRI and cardiac CT might represent superior imaging modalities in BAV assessment of adult TS patients.

超声心动图结合主动脉CTA评价马方综合征患者Bentall手术前后心血管系统功能

目的:探讨马方综合征(Marfan syndrom,MFS)患者Bentall手术前后心血管系统的影像学表现。方法:选择2016年1月至2020年12月期间在本院行Bentall术治疗的10例MFS患者。术前及术后1周行计算机体层成像血管造影(Computed tomography angiography,CTA)检查及经胸彩色多普勒超声心动图检查,评估主动脉病变情况、心脏腔室大小、心功能指标及血流动力学等,并对患者进行最长达4年的随访。结果:10例行Bentall手术的患者中,术前CTA提示主动脉夹层Ⅰ型患者5例、主动脉夹层Ⅲ型患者3例,2例患者主动脉窦部或升主动脉明显扩张。术前超声心动图均可见主动脉瓣中度及以上反流,其中部分患者见左房和(或)左室增大,8例伴有轻度及以上二尖瓣反流,5例伴有三尖瓣反流;术后1周CTA与超声心动图均示主动脉区未见明显异常,左心室前后径与术前相比减小(P<0.05),左室射血分数(Left Ventricular Eject Fraction,LVEF)、左心室短轴缩短率(Left ventricular short-axis fractional shortening,LVFS)、每搏量(Stroke volume,SV)无明显差异(P>0.05);术后随访至今,5例出现心血管系统异常,1例因恶性心律失常而死亡,其余4例暂无不良心血管事件发生。结论:超声心动图结合主动脉CTA等影像学检查可用于MFS患者Bentall术前病情严重程度的评估以及术后治疗效果、随访预后等方面的监测。

螺旋CT血管造影对主动脉病变诊断的初步研究

目的评价螺旋ＣＴ血管造影（ＳＣＴＡ）在诊断主动脉病变中的临床价值及各种重建方法的作用。材料与方法 临床疑诊主动脉病变或胸部疾病的患者３０例，行ＳＣＴＡ检查，６例经手术和／或病理证实，４例与血管造影进行了对照。全部病例行 ＭＩＰ及 ＳＳＤ三维重建，２１例行多方位 ＭＰＲ观察。结果 ３０例中胸主动脉或胸腹主动脉正常９例；先天性主动脉缩窄３例，右位主动脉１例；夹层动脉瘤２例，外伤后假性动脉瘤１例；真性动脉瘤１例；后纵隔恶性淋巴瘤侵及胸主动脉１例；大动脉炎２例；动脉粥样硬化１０例。结论ＳＣＴＡ能可靠显示主动脉形态学病变，在很大程度上可替代创伤性血管造影。

多层螺旋CT血管造影在大血管病变术后复查中的应用

目的 评价多层螺旋CT血管造影术在大血管病变腔内隔绝术或血管搭桥术后复查中的临床应用价值。材料与方法 34例大血管病变腔内隔绝术或血管搭桥术后行多层螺旋CT血管造影术 ,采用准直 2 .5mm ,层厚 3.0mm ,螺距为 6,重建方法为容积漫游技术 (VR)、SSD及MIP ,并对三种方法进行比较。结果 主动脉瘤及夹层动脉瘤行腔内隔绝术后 2 3例 ,血管搭桥术后 7例 ,同时行腔内隔绝术及血管搭桥术后 4例 ;2例出现渗漏 ,VR均能显示 ,SSD、MIP显示 1例。VR图像能清晰显示内支架的位置及形态 ,对搭桥血管的位置、形态、吻合口及远侧段血管情况显示良好 ,明显优于SSD及MIP。结论 多层螺旋CT能在较短时间内进行大范围的扫描 ,有利于大血管病变的检查 ;VR图像优于SSD及MIP ,能为术后情况提供更多信息。

主动脉粥样硬化性溃疡的16层CT诊断

目的:探讨应用16层螺旋CT诊断主动脉粥样硬化性溃疡的价值。方法:分析15例经16层螺旋CT诊断为主动脉粥样硬化性溃疡,14例以急性主动脉综合征就诊,1例以慢性病史就诊。观察溃疡的大小、形态、深度、数量及周围结构关系等。结果:单发溃疡12例,多发溃疡3例;14例急性患者均伴发范围较广泛的主动脉壁内血肿,其中10例合并中量以上血性胸腔、纵隔及心包积液,而1例慢性患者仅为局限的假性动脉瘤,不合并壁内血肿及血性积液等。结论:16层螺旋CT能够对主动脉粥样硬化性溃疡作出准确诊断,可作为急诊首选检查方法。

双源CT Flash大螺距技术对主动脉成像的辐射剂量及升主动脉图像质量的研究

目的:探讨双源CT Flash大螺距扫描模式对主动脉的辐射剂量和升主动脉的图像质量优势。方法:将110例行主动脉CTA检查的患者随机分为A、B两组各55例,分别行传统扫描与Flash大螺距扫描,两组分别检出主动脉夹层患者45例、48例。对两种扫描模式下的主动脉辐射剂量和升主动脉图像质量进行对比评价。结果:两组患者的年龄、体重指数差异无统计学意义。两组的升主动脉图像质量评分差异有统计学意义,分别为2.1±0.7(A组)和1.4±0.6(B组)(t=5.2,P<0.05)。B组采用Flash Spiral扫描模式的辐射剂量为(2.7±0.6)mSv,低于传统扫描模式的(3.9±0.9)mSv,两组差异具有统计学意义(t=2.1,P<0.05)。结论:双源CT主动脉Flash大螺距扫描模式可以较低辐射剂量获得清晰的升主动脉图像,具有较高的临床应用价值。

双源CT在急性主动脉夹层诊断中的价值

目的探讨双源128层螺旋CT双能量扫描模式及三维后处理技术诊断急性主动脉夹层(AAD)的价值。资料与方法回顾性分析116例行双源CT扫描的AAD患者的资料,扫描模式为双能量,重建方法包括多平面重组(MPR)、容积再现(VR)和最大密度投影(MIP)。以数字减影血管造影(DSA)为诊断"金标准",观察分析原始图像及三维重建图像的影像学表现,评价图像质量及满足诊断的特异度和敏感度。结果双源CT平扫诊断AAD的正确率为37.1%(43/116)。MPR对夹层初始破口、内膜瓣和真假腔的显示率分别为93.1%、100.0%、100.0%。VR与MIP的初始破口显示率较低,分别为33.62%、6.90%。MIP的真假腔显示率为23.28%。MPR的综合显示能力明显优于VR和MIP(P<0.01),VR的显示能力优于MIP(P<0.01)。双源CT增强检查诊断AAD的敏感度、特异度均为100.0%。结论双源CT对急性主动脉夹层具有快捷、可靠的诊断价值。胸腹痛患者行CT平扫时应高度重视血管表现;三维重建时选择薄层MPR和VR,可不必做MIP重建。

MSCT对主动脉夹层的诊断价值

目的:探讨MSCT对主动脉夹层疾病的诊断价值。方法:回顾性分析48例主动脉夹层患者的MSCT血管成像资料。结果:全部病例均能辨别真假腔;除6例假腔完全血栓化或表现为壁内血肿的病例外,其余42例均能显示破口,40例显示多发破口;主动脉弓三大分支均受累及的有6例,腹腔干受累及的有9例,肠系膜上动脉受累及的有10例,右肾动脉受累及的有8例,左肾动脉受累及的有15例,右侧髂总动脉受累及的有18例,左侧髂总动脉受累及的有13例,双侧均受累及的有8例;合并动脉瘤或瘤样扩张的有10例,合并粥样硬化的有20例。结论:MSCT可无创性准确诊断各种主动脉夹层。

Stanford A型主动脉夹层住院死亡相关危险因素的CTA形态学分析

目的:对A型主动脉夹层患者主动脉CTA形态学特征进行综合分析,探讨A型主动脉夹层患者住院死亡相关危险因素,为临床预测夹层患者死亡及制定合理的治疗方案提供影像学依据。方法:回顾性分析2011年2月—2013年2月长海医院符合研究要求的47例A型主动脉夹层住院患者全主动脉CTA检查资料,分为死亡组(n=12)及对照组(n=35),利用Vitrea FX图像后处理工作站,对CTA原始图像进行后处理,测量并分析患者住院死亡相关形态学参数,通过单因素及多因素Logistic回归分析探讨A型主动脉夹层患者住院死亡形态学相关危险因素。结果:A型主动脉夹层最大层面主动脉长径(Waldχ2=5.839,P=0.016,OR=1.102)、分支血管累及数量(Waldχ2=4.594,P=0.032,OR=1.337)两个形态学参数与A型夹层患者住院死亡危险因素相关,两者均为危险因素。结论:A型主动脉夹层最大层面主动脉长径、分支血管累及数量两个形态学参数是A型夹层患者住院死亡相关危险因素,较大的主动脉内径及分支血管累及数目多提示临床医生应争取治疗时间。

64层螺旋CT主动脉成像技术的临床应用

目的探讨团注追踪法64层螺旋CT增强扫描技术在主动脉成像中的应用价值。方法对39例拟诊为主动脉病变的患者采用团注追踪法CT增强扫描。以3．5～4ml／s速率分别注射100ml非离子型对比剂和40～50ml生理盐水。计算夹层组和非夹层组主动脉平均强化值的均数和标准差，并进行统计学比较。将两组的图像质量按优、良、差和失败进行分级并行比较。结果非夹层组与夹层组真腔的主动脉平均强化值比较，差异在统计学上无显著性意义（P〉0．05）；与夹层组假腔的主动脉平均强化值比较，差异有显著性意义（P=0．01）。夹层组真、假腔主动脉平均强化值比较，差异有显著性意义（P=0．01）。两组图像质量比较，差异在统计学上无显著性意义（P〉0．05）。结论64层螺旋CT团注追踪法主动脉成像能够满足临床诊断主动脉疾病的需要，扫描延迟时间的选择、监测平面的设定以及后续生理盐水的使用，是主动脉CTA检查成功的重要因素。

双源CT血管造影综合评估Stanford A型主动脉夹层

目的评价双源CT血管造影(DSCTA)综合评价Stanford A型主动脉夹层(AD)主动脉根部结构?冠状动脉和左心室功能的可行性。方法对36例Stanford A型AD患者行术前心电门控DSCTA扫描,评价冠状动脉、主动脉及主动脉瓣膜图像质量及受累情况,测量主动脉根部管径和左心室功能,计算辐射剂量。将DSCTA结果与手术所见进行比较。结果 35例患者成功完成DSCTA检查。97.14%(34/35)的胸主动脉和主动脉瓣膜图像、93.10%(445/478)的冠状动脉节段图像可用于诊断。右窦受累17例,无窦受累15例,左窦受累5例;右-无窦交界受累13例,左-右窦交界受累3例,左-无窦交界受累1例。主动脉窦部直径(41.6±9.4)mm;瓣环直径(28.2±4.1)mm;窦管交界直径(73.6±10.2)mm。左心室射血分数与主动脉根部受累程度呈负相关(r=-0.97,P=0.02)。平均有效辐射剂量为(21.96±4.36)mSv。DSCTA结果与手术病理诊断一致率(30/34,88.24%)和一致性(Kappa=0.82,P<0.01)均较高。结论 DSCTA"一站式"检查综合评价Stanford A型AD主动脉根部结构?冠状动脉和左心功能安全可靠。