多层螺旋CT 多层螺旋CT灌注成像对外周型小结节状肺腺癌淋巴结搬运的确诊价值

来源:中国现代医生 ·2018年10月21日 21:52 浏览量:1

方立挺 郑悦 陈福春

[摘要] 意图 探討多层螺旋CT灌注成像对外周型小结节状肺腺癌淋巴结搬运的确诊价值。 办法 选取2014年4月~2015年10月我院就诊的320破例周型小结节状肺腺癌患者为研讨目标,一切患者均进行多层螺旋CT灌注成像,选用元相关剖析的手法,评论患者多层螺旋CT灌注成像参数:强化峰值(PEI)、血容量(BV)、血流量(BF)和患者淋巴结搬运以及术后复发搬运的联系。 成果 320例研讨目标中,201例有淋巴结搬运,119例无淋巴结搬运,有淋巴结搬运组的强化峰值(PEI)、血容量(BV)、血流量(BF)均明显低于无淋巴结搬运组,差异有统计学含义(P<0.05);随访2年后,119例无淋巴结搬运的患者中,87例呈现复发搬运,32例无复发搬运,有复发搬运组的强化峰值(PEI)、血流量(BF)均明显低于无复发搬运组,差异有统计学含义(P<0.05);有复发搬运组的血容量(BV)和无复发搬运组无明显差异(P>0.05)。 定论 多层螺旋CT灌注成像能有用猜测外周型小结节状肺腺癌淋巴结搬运和术后搬运复发状况,具有临床辅导含义,值得临床推广使用。

[关键词] 多层螺旋CT;灌注成像;外周型小结节状肺腺癌;淋巴结搬运;术后搬运复发

[中图分类号] R734.2;R730.44 [文献标识码] B [文章编号] 1673-9701(2018)12-0113-03

Diagnostic value of multi-slice spiral CT perfusion imaging on lymph node metastasis of peripheral nodular pulmonary adenocarcinoma

FANG Liting1 ZHENG Yue1 CHEN Fuchun2

1.Department of Raidology, Wenling Hospital of Traditional Chinese Medicine in Zhejiang Province, Wenling 317500, China; 2.Department of Thoracic Surgery, Wenling Hospital of Traditional Chinese Medicine in Zhejiang Province, Wenling 317500, China

[Abstract] Objective To investigate the diagnostic value of multi-slice spiral CT perfusion imaging on lymph node metastasis of peripheral nodular pulmonary adenocarcinoma. Methods 320 patients with peripheral nodular pulmonary adenocarcinoma in our hospital from April 2014 to October 2015 were selected. All patients went through multi-slice spiral CT perfusion imaging. Meta correlation analysis was used to investigate the associations of indices of multi-slice spiral CT perfusion imaging[peak enhancement image (PEI), blood volume (BV) and blood flow (BF)]with lymph node metastasis and postoperative metastasis and recurrence. Results Out of 320 subjects, 201 patients were with lymph node metastasis and 119 patients were without lymph node metastasis. PEI, BV and BF of patients with lymph node metastasis were significantly lower than those of patients without lymph node metastasis(P<0.05). After 2-year follow-up, out of 119 patients without lymph node metastasis, metastasis and recurrence were observed in 87 patients and 32 patients were still without metastasis or recurrence. Among these patients, PEI, BF of patients with metastasis and recurrence were significantly lower than those of patients without metastasis or recurrence(P<0.05) while the values of BV in two groups of patients were not significantly different(P>0.05). Conclusion Multi-slice spiral CT perfusion imaging could predict the lymph node metastasis and postoperative metastasis and recurrence in patients with peripheral nodular pulmonary adenocarcinoma. It was worth clinical promotion and application.

[Key words] Multi-slice spiral CT; Perfusion imaging; Peripheral nodular pulmonary adenocarcinoma; Lymph node metastasis; Postoperative metastasis and recurrence

外周型小结节状肺腺癌是肺腺癌的一种[1,2],归于非小细胞肺癌,前期临床表现往往不典型,易发作淋巴结搬运,严峻威胁患者的生命健康[3,4]。1998年在单、双螺旋CT的基础上推出了多层螺旋CT(Multi-slice computed tomography,MSCT)灌注成像[5,6],在注入增强比照剂时进行多层面扫描,经过核算安排的血流灌注量点评安排的灌注状况[7],使CT在医学上的使用有质的开展[8]。而多层螺旋CT灌注成像参数:强化峰值(PEI)、血容量(BV)、血流量(BF)能够很好地反映肿瘤血管的通透性和密布度[9],与肿瘤的淋巴结搬运以及复发密切相关[10]。本研讨旨在评论多层螺旋CT灌注成像对外周型小结节状肺腺癌淋巴结搬运的确诊价值[11],现报导如下。

1 材料与办法

1.1 一般材料

选取2014年4月~2015年10月我院就诊的320破例周型小结节状肺腺癌患者为研讨目标,一切患者均契合以下当选规范:①经印象学或病理学确诊为外周型小结节状肺腺癌;②肺部结节R<2 cm;③术前行多层螺旋CT平扫和灌注成像;④无远处搬运,可手术医治,手术办法为肺叶切除;⑤术前未进行放化疗的患者;⑥无兼并其他恶性肿瘤;⑦无严峻心、肝、肾功能妨碍;⑧无凝血功能妨碍;⑨均给予系统性淋巴结铲除术。其间,男178例,女142例;年纪31~76岁,均匀(46.8±5.4)岁;分解程度:初级分解107例,中分解112例,高分解101例;淋巴结搬运状况:201例患者有淋巴结搬运,119例患者无淋巴结搬运;随访2年复发搬运状况:119例无淋巴结搬运的患者中,87例呈现术后复发搬运,32例未呈现复发搬运。

1.2 扫描办法

1.2.1 CT平扫 选用philips 64排螺旋CT,扫描前辅导患者进行屏息练习,屏息时刻到达30 s。患者屏息状态下惯例完结心肺平扫,剖析图画,选取病灶最大层面及相邻层面为灌注扫描层面。设置扫描参数为:120 kV,100 mA;矩阵:512×512;层厚:5 mm;规模:胸廓进口至肺底;扫描视界:220~380 mm。

1.2.2 多层螺旋CT灌注扫描 依据CT平扫图画断定病灶最大层面,选取上下4个层面进行灌注扫描。经前臂浅静脉将非离子比照剂(碘海醇,300 mgI/mL)用高压打针器注入100 mL,打针后推迟7 s进行扫描。设置扫描参数为:120 kV,80 mA;扫描速度:0.5 s/圈;收集数据时刻:30 s。由三位经验丰富的放射科技师完结扫描。扫描时患者尽量憋气。选用双盲法点评患者多层螺旋CT灌注成像的图画。

1.3 调查目标

依据多层螺旋CT灌注成像,剖析患者灌注参数:①强化峰值(PEI):反映增强比照剂的浓度,由肿块增强最大值-肿块平扫CT值;②血容量(BV):反映全身有用循环血量,经过比照剂的浓度,推算出循环血量;③血流量(BF):依据CT灌注成像的不同强化时刻增强CT值,推算出安排器官的血流量。

1.4 统计学处理

选用SPSS17.0统计学软件进行数据剖析。计量材料以(x±s)表明,选用t查验;计数材料选用χ2查验。以P<0.05为差异有统计学含义。

2 成果

2.1 病理成果

当选患者均经病理学确诊为外周型小结节状肺腺癌,成果见封三图8、9。

2.2 强化峰值(PEI)、血容量(BV)、血流量(BF)与患者淋巴结搬运状况剖析

320例研讨目标中,201例有淋巴结搬运,119例无淋巴结搬运,有淋巴结搬运组的强化峰值(PEI)、血容量(BV)、血流量(BF)均明显低于无淋巴结搬运组,差异有统计学含义(P<0.05),见表1。

2.3 強化峰值(PEI)、血容量(BV)、血流量(BF)与患者术后复发搬运的联系

随访2年后,119例无淋巴结搬运的患者中,87例呈现复发搬运,32例无复发搬运,有复发搬运组的强化峰值(PEI)、血流量(BF)均明显低于无复发搬运组,差异有统计学含义(P<0.05);有复发搬运组的血容量(BV)和无复发搬运组无明显差异(P>0.05),见表2。

3评论

正常人体淋巴结与周围安排无粘连、外表润滑、体积小、无压痛,不仅是免疫应对的首要器官之一,也是承受抗原刺激,发作免疫应对的场所。当病原体侵略机体后,可经过毛细淋巴管回流入淋巴结,淋巴细胞会发作淋巴因子和抗体,有用地铲除其间的病原体,但对病毒和癌细胞的铲除率十分低。当身体某部分发作严峻炎症、肿瘤时,均可引起淋巴结的痛苦、肿大。外周型小结节状肺腺癌归于非小细胞肺癌[12,13],其间淋巴搬运对错小细胞肺癌最常见的搬运途径之一[9],有无淋巴结搬运对患者病况的分期、医治计划的挑选以及预后的判别有重要含义。CT印象学查看作为一种无创查看手法,是现在临床上点评外周型小结节状肺腺癌是否有淋巴结搬运的首要手法之一[14]。CT灌注成像是经过静脉注入比照剂后,接连扫描选定层面,横坐标为时刻,纵坐标为CT值,制作时刻-密度曲线,经过比照剂在安排中浓度的不同来反映安排灌注量的改变,是CT扫描史上的重大突破,经过无创手法获取活体安排器官的相关生理参数[15,16],CT灌注成像也为肿瘤成长、分级、医治手法、预后判别供给相关生理参数。CT灌注成像根据比照剂具有放射性同位素弥散性,在静脉快速团注比照剂时,对感兴趣区层面进行接连CT扫描,然后取得感兴趣区域的时刻-密度曲线,并使用数学模型,核算出相应的灌注参数值,能量化并有用地反映部分安排血流灌注量,对清晰病灶的血供具有重要含义。CT灌注成像具有许多优势:成像速度比CT平扫快、扫描一次可经过重建得到不同层厚的数据、能完结大规模扫描、图画质量提高级[17]。其间灌注相关参数:强化峰值(PEI)、血容量(BV)[18]、血流量(BF)可反映出肿瘤血管的通透程度和密布程度,可作为点评外周型小结节状肺腺癌生理目标的重要依据[19,20]。

本研讨中,选取2014年4月~2015年10月我院就诊的320破例周型小结节状肺腺癌患者为研讨目标,一切患者均进行多层螺旋CT灌注成像,选用元相关剖析的手法,评论患者多层螺旋CT灌注成像参数:强化峰值(PEI)、血容量(BV)、血流量(BF)和患者淋巴结搬运以及术后复发搬运的联系。成果显现:320研讨目标中,201例有淋巴结搬运,119例无淋巴结搬运,有淋巴结搬运组的强化峰值(PEI)、血容量(BV)、血流量(BF)均明显低于无淋巴结搬运组,差异有统计学含义(P<0.05);随访2年后,119例无淋巴结搬运的患者中,87例呈现复发搬运,32例无复发搬运,有复发搬运组的强化峰值(PEI)、血流量(BF)均明显低于无复发搬运组,差异有统计学含义(P<0.05);有复发搬运组的血容量(BV)和无复发搬运组无明显差异(P>0.05)。

综上所述,多层螺旋CT灌注成像能有用猜测外周型小结节状肺腺癌淋巴结搬运和术后复发搬运状况,具有临床辅导含义,值得临床推广使用。

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(收稿日期:2018-01-02)

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