Three-dimensional Imaging of Multi-slice Spiral CT in Bronchial Artery Correlative Study on Blood Supply of Central Lung Cancer and Its Clinical Significance

Objective: To evaluate three-dimensional bronchial artery imaging charactersin central lung cancer and applied values with multi-slice spiral CT (MSCT) to provide theoreticalevidence on blood supply and intervention therapy. Methods: Eighteen patients with central lungcancer underwent MSCT with real time helical thin-slice CT scanning. Three-dimensional bronchialartery reconstruction was done at the console work-station. The space anatomical characters ofbronchial artery were observed through different rotations. Results: For 6 cases, thethree-dimensional images of bronchial artery (33.33%) could exactly show the origins, the routes(lung inner segment and mediatism segment) and the diameters of bronchial arteries. Vision rate ofbronchial arteries was the highest in pulmonary artery stricture and truncation groups, and thevessels' diameter became larger apparently. These characters demonstrated blood supply of this kindof central lung cancer come from bronchial artery. Volume rendering images were the best ones amongthree-dimensional images. Conclusion: Three-dimensional imaging with MSCT in bronchial artery canreveal the anatomical characters of bronchial artery and provide theoretical evidence on bloodsupply and intervention therapy of central lung cancer.

Digital measurement of bone tumor volume by CT three-dimensional reconstruction technology

Objective To discuss the measurement of bone tumor volume on the basis of three dimensional images segmentation technology. Methods Twenty patients with lacunar bone tumor from Tianjin Hospital and Tongji Hospital were included in the

Design Consideration and Reconstruction Method for Double-source Double-multislice Spiral CT

To accelerate the scan speed and improve the image quality, a new type of CT configuration, "double-source double-multislice spiral CT" (DSDMS-CT), which is based on two sets of single-source multislice spiral CT was proposed with a special reconstruction algorithm. Simulation results using the fan-beam filtered backprojection algorithm with a special interpolation method were presented for both single-source multislice spiral CT and DSDMS-CT. The results of new CT model show that it scans faster than the traditional spiral CT and has a better slice sensitivity profile (SSP) with larger pitch value.

Diameters and form of skull base foramen ovale measured by three-dimensional spiral CT thin-slice scan in healthy adults

BACKGROUND： The accurate measurements of various data of the bone diameters of foramen ovale of living person can change the methods of puncturing trigeminal gasserian ganglion via foramen ovale for treating trifacial neuralgia from the experience of puncture operator only to puncture by taking the objective data of measurement as the evidence, which is good for improving the accuracy of puncturing trigeminal ganglion and reducing side effects. OBJECTIVE ： To observe the forms of foramen ovales in healthy adults displayed by volume rendering and multi-planar reconstruction after three-dimensional spiral CT thin-slice scan of skull base, and measure the longitudinal diameter and transverse diameter. DESIGN ： A repetitive observation and measurement SETTINGS ： Department of Neurosurgery and Department of Medical Imaging, Foshan Hospital of Traditional Chinese Medicine. PARTICIPANTS： Fifty healthy adults （100 sides）, who were examined with three-dimensional spiral CT scan, were randomly selected from the Department of Medical Imaging, Foshan Hospital of Traditional Chinese Medicine from January 2005 to January 2006, including 26 males and 24 females, aged 25-68 years with an average of 48 years old. They were all informed and agreed with the examination. METHODS ： The subjects were examined with the Philips 16-slice spiral CT-Mx 8000 IDT CT apparatus （Philips Company, Holland）, the scanning ranged from 2 cm below the canthomeatal line to the level of suprasellar cistem. The width of collimator was 0.75 mm, pitch was 0.663; tube current was 350 mA, voltage was 120 kV, resolution was 512×512 matrix; slice thickness of reconstruction was 1 mm, and interval was 0.5 mm. After the three-dimensional spiral CT thin-slice scan of skull base, the image post-processing techniques including volume rendering and multi-planar reconstruction were applied to observe the forms of foramen ovales, and measure the size, longitudinal diameter and transverse diameter of the foramen ovales. The figures of the foramen ovales were drawn with mouse along the boundary of bone porous margin and soft tissue. According to the indications, the diameters were measured with computer to observe the forms of foramen ovales. MAIN OUTCOME MEASURES ： The longitudinal diameter, transverse diameter and form of foramen ovales were observed. RESULTS： All the 50 healthy adults （100 sides） were involved in the analysis of results. （1） It was observed in the volume rendering images that foramen ovales had four forms of oval shape （77 sides）, kidney shape （12 sides）, round shape （7 sides）, ribbon shape （4 sides）. （2） The longitudinal diameters of left and right foramen ovales were （7.67±1.32） and （7.98±1.45） mm, and the transverse diameters were （4.04±0.83）, （4.09±1.07） mm; There was no obvious difference between left and right longitudinal diameters （t = 1.63, P = 0.11 ）, and left and right transverse diameters were close （t = 0.45, P= 0.65）. CONCLUSION ： The non-invasive techniques of volume rendering and multi-planar reconstruction after three-dimensional spiral CT thin-slice scan can clearly display the formand size of foramen ovale in healthy adults.

Application of spiral CT three dimentional reconstruction on developmental dysplasis of the hip in children

Objective To evaluate the value of surface shaded reconstruction (SSD) of CT scanning on developmental dysplasia of the hip (DDK). Methods Unilateral DDH in 39 cases was examined with Picker 2000S spiral CT to perform SSD of the affected pelvis. All patients were females with the age ranging from 3.5 to 8 years old ( average 4.25 years). Of 39 cases, 22 cases were complete dislocation the hip, 17 cases were subluxation of the hip. The measurement of SSD included of the depth and surface area of normal and affected acetabulum; the distances from the lowest point of the bottom of the acetabulum (O point) to the anterior end (A point) of the lateral margin of anterior acetabular column (OA), the middle point (point) of the acetabular roof (OB) and the posterior end (C point) of lateral margin of the posterior acetabular column (OC). Results In normal hip, the medial and lateral margin of the acetabular roof was overlapping, and in DDH, a bony defect was found in the lateral acetabular margin in

Research on CT characteristics reconstruction technology

The traditional computed tomography(CT)reconstruction methods are noisy,low resolution,poor contrast,and generally not suitable to detect the smaller flaws.Besides,the filter design is also difficult.The CT characteristics reconstruction technology was brought forward to improve in these aspects,which is defined to directly reconstruct the characteristics of the projection for the best requirements not the overall image quality.The two-dimension(2D)and three-dimension(3D)CT characteristics reconstruction algorithm were firstly introduced,then by detailed analysis,experimental results and comparsion of parameters calculated,its advantages in keeping better high-frequency feature,better noise immunity,short time-consuming and easier design are verified.

螺旋CT三维扫描重建联合3D打印用于髋臼骨折手术的价值研究

目的:探讨螺旋CT三维扫描重建联合3D打印技术在髋臼骨折外科手术中的应用价值。方法:选取2018年1月至2020年12月新疆维吾尔自治区人民医院收治的71例髋臼骨折并接受手术治疗的患者,依据治疗方式的不同将其分为观察组(38例)和对照组(33例),观察组采用螺旋CT三维重建,并以3D打印辅助内固定治疗,对照组采用常规手术治疗。比较两组患者手术效果及恢复情况。结果:观察组骨折复位质量评分及分项百分制髋功能评分高于对照组,术中出血量、术中透视次数、手术用时及住院时间均明显低于对照组,差异均有统计学意义(t=23.426、4.216、3.425、17.783,P<0.05);观察组和对照组骨折复位优良率分别为94.74%和78.79%,差异有统计学意义(x^(2)=4.059,P<0.05);观察组患者髋关节功能评分中疼痛、功能及关节活动均高于对照组,差异有统计学意义(t=-4.873、-5.776、-6.247,P<0.05);观察组并发症发生率明显低于对照组,差异有统计学意义(x^(2)=4.059,P<0.05)。结论:在髋臼骨折围术期应用螺旋CT三维重建结合3D打印可进一步保证手术的安全性和可行性,提高手术质量和效率,促进术后恢复。

MSCT三维骨重建技术在髋关节骨折诊断及治疗中的应用

目的探讨多排螺旋CT(MSCT)三维骨重建技术在髋关节骨折诊断及治疗中的应用。方法选择2020年1月~2022年8月我院收治98例髋关节骨折患者,均行常规X线检查和MSCT检查,并进行MSCT三维重建,观察X线片、二维MSCT图像和MSCT骨三维重建图像。结果手术显示,98例患者共发现101处髋中骨折,其中35处为股骨头骨折,24处为股骨颈骨折,21处为粗隆间骨折,21处为髋臼骨折。X线漏检12处骨折,二维CT漏检7处骨折,MSCT三维骨重建未见漏检,其对髋关节骨折检出率显著高于X线及二维CT(P<0.05)。MSCT三维重建对髋臼骨折分型正确检出率高于二维CT和X线,但比较差异未见统计学意义(P>0.05)。根据患者术前MSCT骨三维重建资料设计治疗方案,术中所见与资料吻合,患者手术时间(106.30±27.40)min,术中出血量(356.60±54.17)mL,术中透视时间(21.35±5.11)s,骨折愈合时间(80.46±12.29)d;术后随访显示治疗优良率为94.90%,且暂未发生并发症。结论MSCT三维骨重建可清晰显示髋关节骨折情况,有利于髋关节骨折及骨折分型诊断,对临床手术方案制定及术后关节功能恢复具有重要价值。

骨盆MSCT容积重建高清模型研究

成人骨龄鉴定是法医人类学年龄鉴定的一项重要内容,包含了成人活体骨龄鉴定、未知名尸体骨龄鉴定、白骨化尸体骨龄鉴定等项目。传统鉴定方法主要适用于未知名尸体及白骨化尸体,成人活体年龄鉴定需要提取骨盆容积重建(volume reconstruction,简称VR)高清模型,再参照传统方法检验鉴定。本研究的目的是探讨建立骨盆容积重建高清模型的必要条件,解决成人骨龄鉴定骨盆三维影像取样过程中的多层螺旋CT(multi-slice spiral CT,MSCT)扫描与重建参数设置问题。本研究使用Precision32(开影公司)MSCT,在协议固定管电压120 kV、管电流250 mA、螺距1.05、层厚1.1 mm、层距0.8 mm、矩阵512×512等条件下扫描新鲜尸体骨盆,调整滤波、层厚、层距、矩阵等重建参数,比较骨盆容积重建影像的清晰度,筛选出建立骨盆容积重建高清模型的必要参数值。研究结果表明滤波、层厚、层距、矩阵等对容积重建影像清晰度有较大影响,选择骨盆滤波、薄层厚、短层距、大矩阵能够提高骨盆VR模型的清晰度,为建立骨盆容积重建高清模型提供了重要借鉴。

Multi-slice spiral computed tomography in diagnosing unstable pelvic fractures in elderly and effect of less invasive stabilization

BACKGROUND Older people are more likely to experience pelvic fractures than younger people.Multi-slice spiral computed tomography(CT)uses three-dimensional(3D)reconstruction technology to generate 3D images that can clearly demonstrate the 3D space of fractures and detect fractures at a higher rate.AIM To investigate the clinical value of multi-slice spiral CT 3D reconstruction in the diagnosis of unstable pelvic fractures in the elderly as well as the effect of less invasive stabilization.METHODS A total of 86 patients with unstable pelvic fractures treated between March 2016 and March 2019 underwent femoral supracondylar bone traction before surgery.Pelvic radiography and multi-row spiral CT were performed successively once the patient’s vital signs and hemodynamic indices were stable.Secondary processing of the original data was performed to obtain 3D reconstruction images and determine the vertical displacement of the pelvis.After basic or complete reduction,minimally invasive internal fixation using hollow lag screws was performed.The detection rates of fracture location and classification by X-ray and CT reconstruction were compared.Patients were divided into two groups according to the presence or absence of preoperative 3D reconstruction to compare postoperative reduction,wound healing time,fracture healing time,hospitalization time,visual analog scale(VAS)score,poor internal fixation,and functional recovery.RESULTS The diagnostic coincidence rates of X-rays for pubic symphysis,ilium wing,sacroiliac periarticular,and sacral fractures were lower than those of CT reconstruction.The coincidence rate of CT reconstruction in the clinical classification of pelvic fractures was 100%,whereas 11 cases were misdiagnosed by X-ray;the total coincidence rate was 87.21%.The total excellent and good rates of postoperative reduction were significantly higher in the study group than in the control group(P<0.05).The wound healing,fracture healing,and hospitalization times were significantly shorter in the study group than in the control group(P<0.05).The VAS scores decreased in both groups postoperatively and were lower in the study group than in the control group(P<0.05).The total incidence of poor postoperative internal fixation was significantly lower in the study group than in the control group(P<0.05).The overall rate of postoperative functional recovery was significantly higher in the study group than in the control group(P<0.05).CONCLUSION Multi-slice spiral CT has high guiding significance for the diagnosis,classification,and treatment of unstable pelvic fractures in the elderly.Preoperative 3D reconstruction can effectively shorten the operation time and promote fracture healing,while minimally invasive internal fixation can effectively reduce pain and promote functional recovery of fracture sites,making it worthy of clinical application.

Three-Dimensional Computerized Tomography-Assisted Identification of Necrotic Volume, Distribution, Shape and Prognosis of Collapse in ONFH

Objective: We constructed 3D-model of ONFH in computer according to three-dimensional computerized tomography (3D-CT) data. We determined the location and volume of necrosis to investigate its clinical efficacy. Method: Totally 92 hips (59 cases) with ONFH (44 males, 15 females) were included, with mean age of 37.5 years (range from 26 to 58). Totally 20 cases (35 hips) were induced by corticosteroid (CTSs), 31 (49 hips) induced by alcohol, 4 (4 hips) induced by trauma and 4 (4 hips) idiopathic. All the hips were categorized into stage ARCO II. Finally diagnosed by MRI, all hips were scanned by CT to acquire data in DICOM format. The images were imported into software to extract 3D-shape of femoral heads, necrotic foci, their volumes and distribution in each quadrant. Deviation of volumes between digital image and biopsy specimen was analyzed by SAS9.1 package. Correlativity between collapse and volume of necrosis under specific pathogeneses was also analyzed. Among the cases necessitating total hip arthroplasty (THA) due to advancing to ARCO III, we randomly selected 8 of them to perform 3D-CT scanning thrice prior to surgical operation. Total femoral heads harvested were torn asunder. Cubic capacity of femoral heads and necrotic foci were hereby measured and compared with those acquired from digital models. Result: Through the digital model, necrotic foci were found mainly locating within the super lateral portion of femoral head, coinciding with those observed in biopsy specimen. Average volumetric ratio of digitally acquired necrosis focus/femoral head in 58 collapsed hips was 36.8%. The ratio of the 34 hips without collapse was 17.3%. In collapsed femoral heads, the distribution of necrosis focus was 23.4% in quadrant 1 (q1), 23.6% in q2, 12.1% in q3, 14.4% in q4, 9.0% in q5, 11.8% in q6, 1.6% in q7 and 3.9% in q8. In femoral heads without collapse, the distribution was 34.2% in q1, 29.6% in q2, 11.8% in q3, 11.3% in q4, 6.0% in q5, 6.0% in q6, 0.5% in q7 and 0.4% in q8. As for the average cubic capacities of femoral heads and necrotic foci, those acquired from the digital model and biopsy specimen had no significant difference in matched-pairs test (t = -1.49, P = 0.179 for femoral heads and t = -1.52, P = 0.172 for necrotic foci). There was significant difference (F = 2.720, P = 0.035 P was respectively 0.0001 and 0.0005). Decision tree model showed that 94.6% (53/56) hips would progress into collapse if the volumetric ratio of necrotic tissue was over 23.48%. Otherwise, if distribution in q2 was over 45.13%, 83.3% (5/6) hips would progress into collapse. No collapse (0/30) would occur if the distribution of necrotic tissue in q2 was under 45.13%. Conclusion: Digital 3D-model reconstructed from CT scanning can precisely incarnate spatial orientation of necrotic foci in femoral head. Multinomial logistic regression and decision-making tree shows that volumetric ratio of necrotic tissues plays an important role in anticipating collapse of femoral head.

Diagnostic Value of 16 Slices Spiral-CT for Portal Vein Disorders

Summary: The diagnostic value of 16-slices spiral computed tomography (CT) for portal vein disorders was evaluated. Forty-one patients were scanned by the 16-slices spiral-CT. The celiac trunk, portal vein and their branches were reconstructed by volume rendering (VR), multiplanar volume reconstruction (MPVR) and maximum intensity projection (MIP) technique, and the results were compared with digital subtraction angiography (DSA). VR, MPVR and MIP could display celiac trunk, portal vein, inferior vena cava and their branches and extent of portal vein-vena cava shunt, portal vein emboli and the fistula of hepatic artery-portal vein. The results from 16-slices CT were better than DSA and identical with pathologic ones. The vessel three-dimension reconstruction technique of 16-slices spiral CT is valuable for evaluating the portal systemic disorders.

多排螺旋CT在急腹症影像诊断中的价值

目的评价多排螺旋CT重建技术在急腹症影像诊断中的应用价值。方法回顾性分析沈阳医学院附属第二医院于2019年3月至2020年2月收治的98例急腹症患者的临床资料,所有患者均使用多排螺旋CT进行扫描,根据临床最终诊断结果,评价分析CT重建技术的诊断准确率。结果多排螺旋CT扫描正确诊断96例(97.96%),包括阑尾炎40例(40.82%),胆囊炎22例(22.45%),肠梗阻16例(16.33%),泌尿系统结石11例(11.22%),胰腺炎7例(7.14%),误诊2例,包括1例1例阑尾炎,1例胆囊炎。结论在急腹症影像诊断中,多排螺旋CT重建技术准确率较高,可以作为临床急腹症早期诊断的重要依据。

老年足踝部隐匿性骨折MSCT三维重建、磁共振成像特点及联合诊断价值

目的研究老年足踝部隐匿性骨折多层螺旋CT(MSCT)三维重建、磁共振成像特点及联合检查的诊断价值,以期为临床早期诊断提供参考依据。方法选取2021年3月—2024年1月收治的120例疑似老年足踝部隐匿性骨折为研究对象,入院后均行MSCT、磁共振成像检查。分析老年足踝部隐匿性骨折的MSCT三维重建、磁共振成像特点。比较MSCT三维重建与磁共振成像检查对老年足踝部隐匿性骨折显示率。比较MSCT三维重建、磁共振成像及联合检查诊断老年足踝部隐匿性骨折的应用价值。结果120例疑似老年足踝部隐匿性骨折中,最终确诊101例,常规X线检查均为阴性,其中外踝撕脱性骨折33例(32.67%)、跟骨前外侧缘骨折26例(25.74%)、距骨骨折19例(18.81%)、内踝骨折8(7.92%)、后踝骨折6例(5.94%)、胫腓骨远端骨折5例(4.95%)、骰骨骨折2例(1.98%)、跖骨近端骨折1例(0.99%)、跟骨体骨折1例(0.99%)。MSCT三维重建影像特点表现为骨折处骨小梁断裂,骨皮质连续性消失,合并有一定程度的骨片撕裂脱落。磁共振成像显示骨髓不规则片状信号,T1WI不规则细线状、条索状低信号,T2WI略高或低信号,脂肪抑制序列高信号或混杂高信号。磁共振成像对骨挫伤/骨髓水肿显示率高于MSCT三维重建(P<0.05)。MSCT三维重建、磁共振成像及联合检查分别检出老年足踝部隐匿性骨折97、95、101例;联合检查的敏感度100.00%(101/101)、准确度100.00%(120/120)高于MSCT三维重建[94.06%(95/101)、93.33%(112/120)]、磁共振成像检查[93.07%(94/101)、93.33%(112/120)],漏诊率为0低于MSCT三维重建5.94%(6/101)、磁共振成像检查6.93%(7/101)(P<0.05)。结论磁共振成像、MSCT三维重建联合检查可有效提高老年足踝部隐匿性骨折诊断准确率,临床可通过该方法进行早期诊断,以制订后续治疗方案。

多层螺旋CT三维重建技术对盲肠憩室炎和急性阑尾炎具有较高诊断价值

目的 探究多层螺旋CT鉴别诊断盲肠憩室炎和急性阑尾炎的价值。方法 选取2020年1月~2023年9月于长沙医学院附属第一医院、临湘市人民医院和益阳市第三人民医院收治的128例临床疑诊为急性阑尾炎的患者病历资料进行回顾性分析,患者术前均进行CT平扫和三维重建图像处理。以术后的病理结果或出院诊断为金标准,深度探究多层螺旋CT三维重建技术诊断盲肠憩室炎和急性阑尾炎的临床应用价值,分析两者的鉴别要点。结果 128例患者经手术病理或出院治疗结果证实急性阑尾炎49例,盲肠憩室炎41例,急性阑尾炎合并盲肠憩室炎21例,正常人17例。术前多层螺旋CT三维重建技术诊断盲肠憩室炎的准确度为96%;诊断急性阑尾炎的准确度为98.25%;诊断急性阑尾炎合并盲肠憩室炎的准确度为100%。CT征象:急性阑尾炎患者的阑尾增粗的比例高于盲肠憩室炎,差异有统计学意义(P<0.05);89.80%的阑尾炎患者阑尾周围有渗出而盲肠周围无渗出,82.93%的盲肠憩室炎患者盲肠周围有渗出而阑尾周围无渗出。结论 多层螺旋CT三维重建技术在急性阑尾炎和盲肠憩室炎的鉴别诊断中有较高的效能,并且能对临床治疗方式的选择提供指导性意见。

急性阑尾炎相关评分系统联合螺旋CT薄层重建检查对急性阑尾炎的诊断价值

目的探讨急性阑尾炎相关评分系统联合螺旋CT薄层重建检查对急性阑尾炎的诊断价值。方法选取2020年7月至2021年12月上海交通大学医学院苏州九龙医院收治的72例初步诊断为急性阑尾炎的患者作为研究对象,所有患者均采用手术治疗,并以病理结果作为金标准,术前进行螺旋CT薄层重建检查及阑尾炎炎症反应(appendicitis inflammatory response,AIR)评分和Alvarado评分对患者进行评估,分析AIR评分联合螺旋CT薄层重建及Alvarado评分联合螺旋CT薄层重建对急性阑尾炎患者的诊断价值。结果经手术病理检查,72例患者中68例确诊为急性阑尾炎;AIR评分联合螺旋CT薄层重建诊断阳性66例,阴性6例;Alvarado评分联合螺旋CT薄层重建诊断阳性60例,阴性12例。两种诊断方式对急性阑尾炎诊断的特异度及阳性预测值比较差异无统计学意义;AIR评分联合螺旋CT薄层重建对急性阑尾炎诊断的灵敏度、阴性预测值及准确度上均高于Alvarado评分联合螺旋CT薄层重建,差异有统计学意义(P<0.05)。结论AIR评分联合螺旋CT薄层重建对急性阑尾炎的诊断价值较高,可进一步提高急性阑尾炎的诊断率,且为无创检查,对急性阑尾炎患者的诊断和预后评估具有重要意义,值得临床推广应用。

股骨颈骨折诊断中多层螺旋CT多平面重建技术的作用

目的:探析股骨颈股折诊断中多层螺旋CT多平面重建技术的作用效果。方法:回顾性分析2020年1月-2022年4月我院收治的98例股骨颈骨折患者为研究对象。于术前对患者开展影像学检查,依照检查方法应用的不同划分为A组(n=35)、B组(n=63)。A组选用X线检查,B组选用多层螺旋CT平面重建技术。分析不同检查应用的作用效果。结果:A组的诊断符合率为85.71%,低于B组的100.00%,差异有统计学意义(P<0.05)。在Garden分型方面,B组的I型为20.63%、II型38.10%、III型30.16%、IV型11.11%;在骨折分型方面,B组的经颈型30.16%、头下型47.62%、基底型22.22%,诊断符合率均为100.00%。在血管显影方面,B组中19例经颈型旋股内外动脉主干显影均清晰,13例支持带动脉清晰显影,6例支持带动脉显影稀疏,同时分布较为扭曲;头下型未发现显影;14例基底型能够清晰可见动脉显影。术后随访发现,A组的股骨头坏死率、骨折愈合延迟或不愈合率分别为25.71%、22.86%,均高于B组的3.17%、1.59%,组间差异有统计学意义(P<0.05)。结论:在临床诊断股骨颈骨折,以及对其分型、评估预后其中,采取多层螺旋CT多平面重建技术,取得的诊断效果明显高于X线片检查,能有效保证检查的开展更具直观性、全面性和准确性,有较好的临床应用价值。

多层螺旋CT三维重建技术在特发性脊柱侧弯诊断中的准确性及影像学表现分析

目的 分析在特发性脊柱侧弯诊断中运用多层螺旋CT三维重建技术的准确性和影像学表现。方法 纳入本院2022年1月至12月拟诊为特发性脊柱侧弯的29例患者作为此次分析对象,各自对患者进行多层螺旋CT三维重建技术和磁共振成像检查,并分析多层螺旋CT三维重建技术及磁共振成像诊断特发性脊柱侧弯疾病的准确性和影像学表现。结果 29例受检者中确诊为特发性脊柱性侧弯患者有20例,6例脊髓病变者由磁共振成像检查发现,3例隐匿性椎体畸形者由多层螺旋CT三维重建技术检查发现。29例患者Cobb′s角在21°~90°,平均Cobb′s角为(32±10)°。多层螺旋CT三维重建技术图像比磁共振成像检查影像图像更好。结论在特发性脊柱侧弯诊断中运用多层螺旋CT三维重建技术的准确性较高,诊断结果准确,图像清晰,分辨率高。

64排螺旋CT多平面重建在CT引导下经皮肝穿刺活检中的应用价值

目的探究64排螺旋CT多平面重建在CT引导下经皮肝穿刺活检的应用价值。方法选择2020年1月至2022年12月肝脏病变穿刺52例患者作为研究对象,采用随机数字表法分为MPR重建图像参照组(n=26)与轴位图像参照组,每组26例。轴位图像参照组使用常规轴位图像定位,MPR重建图像参照组患者的容积数据进行轴、矢、冠多方位重建,指导穿刺进针轨迹、取材的部位。比较2组患者术中调整进针方向的次数、取材的准确性、术后并发症、穿刺时间、穿刺成功率、术后疼痛。结果MPR重建图像参照组术中调整进针方向的次数、穿刺时间少于轴位图像参照组,术后疼痛评分低于轴位图像参照组(P<0.05)。MPR重建图像参照组取材的准确性、穿刺成功率高于轴位图像参照组,但组间比较无明显差异(P>0.05)。MPR重建图像参照组并发症为3.85%,轴位图像参照组为26.92%,2组比较差异有统计学意义(P<0.05)。MPR重建图像参照组满意度为96.15%,对照组为76.92%,2组比较差异有统计学意义(P<0.05)。结论与常规轴位图像定位,使用MPR重建图像进行引导可以显著减少术中调整进针方向的次数和穿刺时间,降低术后疼痛评分。MPR重建图像参照组取材的准确性和穿刺成功率也较高。此外,MPR重建图像参照组的并发症发生率较低,并且患者满意度更高。

MSCT后处理技术在颌面骨折诊断中的应用价值

目的分析多层螺旋CT(MSCT)后处理技术在颌面骨折诊断中的应用价值。方法回顾性分析2021年6月~2023年6月收治的80例颌面骨折患者的临床资料,患者在治疗前均进行MSCT检查,以手术结果作为“金标准”,分析MSCT平扫与MSCT后处理技术两种处理结果的优缺点。结果80例颌面部骨折诊断结果显示,患者中多发性骨折68例,单发性骨折12例,其中患者多见上下颌骨骨折,眉骨、蝶骨骨折相对少见。MSCT平扫诊断出多发性骨折55例,单发性骨折25例;MSCT后处理诊断出多发性骨折66例,单发性骨折14例,MSCT平扫的多发性骨折检出率低于MSCT后处理技术后的多发性骨折检出率(χ^(2)=4.103,P=0.043);MSCT平扫的总骨折检出率低于MSCT后处理技术后的颌面部总骨折检出率(P<0.05)。结论MSCT后处理技术能有效提升对颌面骨折的诊断价值,对多发性骨折及骨折部位的诊断率高于平扫。