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        MRI三維重建技術(shù)在顱神經(jīng)血管壓迫綜合征中的應(yīng)用價(jià)值

        2024-01-01 00:00:00李丹劉陽(yáng)雷苗李傳坤張明王淵

        摘要:目的"探討MRI三維重建技術(shù)在顱神經(jīng)血管壓迫綜合征責(zé)任血管識(shí)別和神經(jīng)受壓判定中的應(yīng)用價(jià)值。方法"在微血管減壓術(shù)前對(duì)91例三叉神經(jīng)痛及72例面肌痙攣患者行橋小腦角池段顱神經(jīng)和血管成像,將獲得的MRI原始數(shù)據(jù)分別進(jìn)行二維和三維水平(曲面及仿真內(nèi)窺鏡)重建,多維度評(píng)價(jià)責(zé)任血管的數(shù)目、來(lái)源和顱神經(jīng)受壓程度,并將影像診斷結(jié)果與術(shù)中所見(jiàn)進(jìn)行比較。結(jié)果"三維重建技術(shù)對(duì)三叉神經(jīng)痛責(zé)任血管的正確識(shí)別率為95.6%,對(duì)血管壓迫神經(jīng)判定的準(zhǔn)確性為94.5%。此技術(shù)對(duì)面肌痙攣責(zé)任血管的正確識(shí)別率為91.7%,對(duì)血管壓迫神經(jīng)判定的準(zhǔn)確性為89.5%。三維重建技術(shù)對(duì)責(zé)任血管與顱神經(jīng)單純性接觸的判定準(zhǔn)確率明顯高于二維圖像(Plt;0.05)。結(jié)論"MRI三維重建技術(shù)可以提高責(zé)任血管識(shí)別的正確率,更加準(zhǔn)確地檢測(cè)顱神經(jīng)受壓程度,對(duì)于多支責(zé)任血管造成的顱神經(jīng)復(fù)雜性壓迫更為適用。

        關(guān)鍵詞:顱神經(jīng)血管壓迫綜合征;責(zé)任血管;曲面重建;仿真內(nèi)窺鏡

        臨床研究注冊(cè)號(hào):Clinicaltrial NCT02713646, NCT04645277

        中圖分類號(hào):R741.04""""文獻(xiàn)標(biāo)志碼:A

        DOI:10.7652/jdyxb202405022

        The value of three-dimensional MRI reconstruction in

        cranial neurovascular compression syndrome

        LI Dan""1", LIU Yang""2nbsp;, LEI Miao""2", LI Chuankun""3", ZHANG Ming""2", WANG Yuan""2

        (1. Department of Respiratory and Critical Care Medicine; 2. Department of

        Medical Imaging; 3. Department of Neurosurgery, The First Affiliated Hospital of

        Xi’an Jiaotong University, Xi’an 710061, China)

        ABSTRACT: Objective"To investigate the application value of MRI three-dimensional reconstruction techniques in the identification of offending vessels and affected nerves in cranial neurovascular compression syndrome. Methods"A total of 91 patients with trigeminal neuralgia and 72 patients with hemifacial spasm underwent FIESTA and TOF-MRA scanning before microvascular decompression. Two-dimensional and three-dimensional reconstruction techniques (curved planar reconstruction and MR virtual endoscopy) were respectively performed using the original MRI data so as to evaluate the number and category of offending vessels and the degree of compression on cranial nerves. The results of imaging diagnosis were compared with the observations during neurosurgery. Results"The correct identification rate of the offending vessels in trigeminal neuralgia was 95.6% by 3D reconstruction technique, with 94.5% diagnostic accuracy of neurovascular compression. In addition, the accurate identification rate was 91.7% on the detection of the offending vessels in hemifacial spasm, with 89.5% accuracy of the judgment on neurovascular compression. It should be noted that the diagnostic accuracy for the simple contact between the offending blood vessels and the cranial nerves using 3D reconstruction was significantly higher than that of the evaluation through 2D observation (Plt;0.05). Conclusion"3D reconstruction technique can improve the accuracy of offending blood vessels identification and provide more reliable information on the degree of cranial nerve distortion or atrophy. Therefore, 3D MRI images are more suitable for investigating the complex neurovascular compression.

        KEY WORDS: cranial neurovascular compression syndrome; offending vessel; curved planar reconstruction; magnetic resonance virtual endoscopy

        顱神經(jīng)血管壓迫綜合征(cranial neurovascular compression syndrome, CNCS)是指橋小腦角池內(nèi)血管形態(tài)及位置異常,壓迫鄰近顱神經(jīng)產(chǎn)生相應(yīng)的臨床癥狀。根據(jù)受壓顱神經(jīng)的不同,患者可表現(xiàn)為三叉神經(jīng)痛、面肌痙攣、舌咽神經(jīng)痛和前庭陣發(fā)癥""[1]"。微血管減壓是治療CNCS最有效的外科術(shù)式,術(shù)者將一棉墊置于責(zé)任血管與神經(jīng)之間,此時(shí)血管搏動(dòng)無(wú)法直接刺激顱神經(jīng),術(shù)后大多數(shù)患者癥狀明顯減輕""[2-3]"。此術(shù)式最好在術(shù)前明確責(zé)任血管的來(lái)源(動(dòng)脈性、靜脈性、混合性)以及血管-神經(jīng)的空間解剖關(guān)系(單純接觸/壓迫推移),這是術(shù)后癥狀緩解和是否發(fā)生并發(fā)癥的關(guān)鍵。MRI具有較高的空間分辨率和軟組織對(duì)比度,可以顯示顱神經(jīng)的細(xì)微結(jié)構(gòu)和血管-神經(jīng)壓迫的細(xì)節(jié)""[4]"。目前MRI掃描采用三維穩(wěn)態(tài)進(jìn)動(dòng)快速采集成像序列(three-dimensional fast imaging employing stead state acquisition, 3D- FIESTA")和三維時(shí)間飛躍法磁共振血管成像(three- dimensional""time of flight magnetic resonance angiography, 3D TOF-MRA)""[5-6]",但主要在二維水平進(jìn)行圖像重建,這在多支責(zé)任血管(動(dòng)靜脈混合性)多點(diǎn)壓迫顱神經(jīng)(血管迂曲形成袢狀結(jié)構(gòu))時(shí)常會(huì)造成誤診和漏診""[7-8]"。本研究選取顱神經(jīng)3D-FIESTA序列,同時(shí)采用二維和三維圖像重建技術(shù),比較不同數(shù)據(jù)后處理方式判定血管-神經(jīng)接觸/壓迫的準(zhǔn)確性,以體現(xiàn)MRI三維重建技術(shù)在CNCS術(shù)前診斷中的優(yōu)勢(shì)。

        1"資料與方法

        1.1"研究對(duì)象

        本研究為回顧性診斷性研究,研究連續(xù)選取2012年6月-2022年9月在西安交通大學(xué)第一附屬醫(yī)院就診的CNCS患者171例,其中三叉神經(jīng)痛患者97例,面肌痙攣患者74例。三叉神經(jīng)痛患者納入標(biāo)準(zhǔn)需符合以下3項(xiàng)臨床特征""[9]":①疼痛限于三叉神經(jīng)的一支或多支分布區(qū);②疼痛性質(zhì)為陣發(fā)性的劇烈刺痛、燒灼痛、電擊痛,持續(xù)數(shù)秒至數(shù)分,具有發(fā)作間歇期;③刺激扳機(jī)點(diǎn)可誘發(fā)疼痛。面肌痙攣患者納入標(biāo)準(zhǔn)需符合下述臨床表現(xiàn):①單側(cè)顏面部肌肉非自主、陣發(fā)性、反復(fù)發(fā)作的抽搐;②面部抽搐早期為眼輪匝肌痙攣,而后可累及面頰、口角肌群及頸闊肌;③精神緊張、焦慮等因素可誘發(fā)或加重面部痙攣發(fā)作""[3]"。排除標(biāo)準(zhǔn):①神經(jīng)系統(tǒng)器質(zhì)性損害(如橋小腦角區(qū)及腦干占位性病變、感染性病變、脫髓鞘病變等)引起的繼發(fā)性頭面部疼痛及面部肌肉抽搐;②嚴(yán)重軀體性或精神性疾病,藥物、酒精依賴者和月經(jīng)期婦女;③患者曾接受微血管減壓、神經(jīng)根阻滯或射頻熱凝、γ刀定向放療、肉毒桿菌毒素等侵入性治療。本研究經(jīng)過(guò)醫(yī)院倫理委員會(huì)論證并審核批準(zhǔn),所有患者均簽署知情同意書。

        1.2"數(shù)據(jù)采集

        使用GE Signa HDxt 3.0T 和GE Discovery MR750w超導(dǎo)型MRI掃描系統(tǒng)進(jìn)行數(shù)據(jù)采集,8通道正交頭線圈。先行常規(guī)全腦MRI篩查,包括軸位T1-Flair、軸位和冠狀位T2WI,掃描參數(shù)為T1-Flair:TR 2780 ms,TE 24 ms,矩陣 320×224,F(xiàn)OV 240 mm,層厚5 mm,間隔1 mm;T2WI:TR 8500 ms,TE 165 ms,矩陣 288×224,F(xiàn)OV 240 mm,層厚5 mm,間隔1 mm,對(duì)于橋小腦角區(qū)或腦干存在器質(zhì)性病變患者將終止進(jìn)一步檢查。對(duì)入組的三叉神經(jīng)痛和面肌痙攣患者行3D-FIESTA及3D TOF-MRA掃描,以判斷橋小腦角池段三叉神經(jīng)和面神經(jīng)周圍是否存在責(zé)任血管及顱神經(jīng)受壓細(xì)節(jié)。三叉神經(jīng)痛以腦橋中部、面肌痙攣以橋延溝為中心進(jìn)行定位,掃描范圍自延髓下部至鞍上池,具體參數(shù)如下:3D-FIESTA序列 TE 2.3 ms,F(xiàn)A 60°,矩陣448×320,F(xiàn)OV 180 mm,層厚0.8 mm,間距0 mm,NEX 2(圖1A、2A);3D TOF-MRA序列 TR 19 ms,TE 2.8 ms,F(xiàn)A 15°,矩陣256×256,F(xiàn)OV 180 mm,層厚0.8 mm,間距"0 mm",NEX 1(圖1B、2B)。掃描過(guò)程中發(fā)現(xiàn)6例三叉神經(jīng)痛患者和2例面肌痙攣患者存在橋小腦角區(qū)占位性病變(4例表皮樣囊腫、3例腦膜瘤、1例聽(tīng)神經(jīng)瘤)而被剔除出組,最終91例三叉神經(jīng)痛患者和72例面肌痙攣患者納入進(jìn)一步分析。

        1.3"MRI數(shù)據(jù)后處理

        (1) 顱神經(jīng)二維重建:3D-FIESTA及3D TOF-MRA序列采集的橋小腦角池段顱神經(jīng)及鄰近血管的影像數(shù)據(jù)導(dǎo)入ADW 4.6工作站進(jìn)行后處理,原始數(shù)據(jù)分別進(jìn)行1 mm層厚的軸位及沿顱神經(jīng)走行方向的斜矢狀位和斜冠狀位重建,可從二維水平觀察變異血管與顱神經(jīng)的解剖關(guān)系。

        (2) 顱神經(jīng)三維重建:將3D-FIESTA原始數(shù)據(jù)導(dǎo)入

        GE ADW 4.6工作站,選擇Curved預(yù)案進(jìn)行顱神經(jīng)曲面重建,將曲面起點(diǎn)置于眶尖(三叉神經(jīng))和面神經(jīng)水平段起點(diǎn)(面神經(jīng))附近,沿顱神經(jīng)走行路徑逐層畫點(diǎn),做一側(cè)神經(jīng)曲面重建,然后沿對(duì)側(cè)神經(jīng)至終點(diǎn),將雙側(cè)三叉神經(jīng)或面神經(jīng)處理到同一曲面上,通過(guò)旋轉(zhuǎn)圖像可從不同角度觀察雙側(cè)顱神經(jīng)的走行以及與鄰近血管的關(guān)系。然后選擇Navigation預(yù)案行仿真內(nèi)窺鏡重建,選擇坐標(biāo)和視角,調(diào)節(jié)閾值(Smooth一般選擇5 000~8 000)。此處應(yīng)將觀察點(diǎn)置于略高于或低于顱神經(jīng)的腦脊液內(nèi),變換角度以便清晰顯示顱神經(jīng)與血管的解剖關(guān)系。可用“Shift”+“鼠標(biāo)左鍵”在顱神經(jīng)和血管三維圖像上滑動(dòng),在原始圖像上驗(yàn)證重建是否正確。

        所有圖像由2名具有10年以上工作經(jīng)驗(yàn)的影像科醫(yī)師獨(dú)立閱片,分別觀察顱神經(jīng)二維圖像和三維重建圖像,觀察重點(diǎn)為癥狀側(cè)三叉神經(jīng)或面神經(jīng)周圍有無(wú)關(guān)系密切血管及血管來(lái)源(動(dòng)脈性、靜脈性、動(dòng)靜脈混合性),以及血管與顱神經(jīng)的解剖關(guān)系(血管-神經(jīng)無(wú)接觸,血管-神經(jīng)接觸但無(wú)推移,血管壓迫神經(jīng)移位/萎縮)""[10]"。

        1.4"三叉神經(jīng)痛和面肌痙攣患者的病情評(píng)估

        由同一名高年資神經(jīng)外科醫(yī)師對(duì)所有三叉神經(jīng)痛和面肌痙攣患者的痛覺(jué)強(qiáng)度和面肌抽搐程度進(jìn)行測(cè)定。三叉神經(jīng)痛采用臨床上常用的視覺(jué)模擬評(píng)分法(visual analog scale, VAS),測(cè)定值為0~10,0為無(wú)痛,10為最強(qiáng)烈疼痛,患者根據(jù)疼痛發(fā)作時(shí)的主觀感受進(jìn)行評(píng)分""[11]"。面肌痙攣按照Cohen痙攣分級(jí)標(biāo)準(zhǔn)(4級(jí))""[12]",0級(jí):無(wú)痙攣;1級(jí):外部刺激引起瞬目增加;2級(jí):眼瞼、面部輕微顫動(dòng),無(wú)功能障礙;3級(jí):痙攣明顯,有輕微功能障礙;4級(jí):嚴(yán)重痙攣,伴有明顯功能障礙。嚴(yán)重痙攣患者可因眼輪匝肌快速抽動(dòng)導(dǎo)致睜眼困難,口角抽動(dòng)引起說(shuō)話和進(jìn)食困難。微血管減壓術(shù)亦由上述神經(jīng)外科醫(yī)師完成,術(shù)中反復(fù)確認(rèn)責(zé)任血管的來(lái)源及顱神經(jīng)受壓程度。記錄三叉神經(jīng)痛和面肌痙攣患者的癥狀側(cè)別、病程、發(fā)作頻率和持續(xù)"時(shí)間。

        1.5"統(tǒng)計(jì)學(xué)處理

        采用SPSS 26.0軟件進(jìn)行統(tǒng)計(jì)學(xué)分析。首先應(yīng)用配對(duì)卡方檢驗(yàn)比較二維圖像和三維重建圖像對(duì)兩組患者識(shí)別責(zé)任血管數(shù)量和來(lái)源的正確率,然后比較二維圖像和三維重建圖像對(duì)血管-神經(jīng)壓迫程度(無(wú)接觸、接觸但神經(jīng)無(wú)移位、神經(jīng)受壓移位/萎縮)的診斷準(zhǔn)確率。應(yīng)用ICC檢驗(yàn)分析兩名影像科醫(yī)師對(duì)識(shí)別責(zé)任血管和血管-神經(jīng)壓迫的觀測(cè)者間一致性。"Plt;0.05為"差異具有統(tǒng)計(jì)學(xué)意義。

        2"結(jié)""果

        2.1"研究對(duì)象人口學(xué)信息和一般臨床資料

        三叉神經(jīng)痛患者男性和女性比例分別為48.4%及51.6%,平均年齡為58.34歲。面肌痙攣患者男性和女性比例分別為44.4%及55.6%,平均年齡為53.88歲。兩組患者的臨床資料,包括病程、癥狀側(cè)別、癥狀嚴(yán)重程度、發(fā)作頻率和持續(xù)時(shí)間如表1所示。

        2.2"三叉神經(jīng)痛和面肌痙攣患者的責(zé)任血管數(shù)量和來(lái)源分析

        91例三叉神經(jīng)痛和72例面肌痙攣患者均為單側(cè)發(fā)病。三叉神經(jīng)痛患者二維圖像上共發(fā)現(xiàn)責(zé)任血管83根,其中76例(83.50%)患者的責(zé)任血管為動(dòng)脈性,3例(3.30%)為靜脈性,2例(2.20%)為動(dòng)脈-靜脈混合性,10例(11.00%)未發(fā)現(xiàn)明顯責(zé)任血管;三維重建圖像上共發(fā)現(xiàn)責(zé)任血管89根,其中70例("76.92%")患者的責(zé)任血管為動(dòng)脈性,6例(6.59%)為靜脈性,5例(5.49%)為動(dòng)脈-靜脈混合性,10例("11.00%")未發(fā)現(xiàn)明顯責(zé)任血管。進(jìn)一步分析發(fā)現(xiàn),動(dòng)脈引起的三叉神經(jīng)受壓在二維圖像和三維重建檢測(cè)時(shí)組間無(wú)統(tǒng)計(jì)學(xué)差異(χ"2=1.25,P=0.26)。面肌痙攣患者二維圖像上共發(fā)現(xiàn)責(zé)任血管65根,其中"62例"(86.11%)患者的責(zé)任血管為動(dòng)脈性,1例("1.39%")為靜脈性,1例(1.39%)為動(dòng)脈-靜脈混合性,8例("11.11%")未發(fā)現(xiàn)明顯責(zé)任血管;三維重建圖像上共發(fā)現(xiàn)責(zé)任血管67根,其中60例(83.33%)患者的責(zé)任血管為動(dòng)脈性,2例(2.78%)為靜脈性,2例(2.78%)為動(dòng)脈-靜脈混合性,8例(11.11%)未發(fā)現(xiàn)明顯責(zé)任血管。進(jìn)一步分析發(fā)現(xiàn),動(dòng)脈引起的面神經(jīng)受壓在二維圖像和三維重建檢測(cè)時(shí)組間無(wú)統(tǒng)計(jì)學(xué)差異(χ"2=0.22,P=0.63)。此外,兩名診斷醫(yī)師應(yīng)用二維圖像觀察三叉神經(jīng)痛和面肌痙攣責(zé)任血管的ICC值分別為0.90和0.85,應(yīng)用三維重建圖像觀察相應(yīng)病變責(zé)任血管的ICC值為0.88和0.86,提示觀察者間一致性較高。

        2.3"三叉神經(jīng)痛和面肌痙攣患者的血管-神經(jīng)壓迫程度分析

        在二維圖像上共發(fā)現(xiàn)血管-神經(jīng)單純性接觸的三叉神經(jīng)痛患者74例,7例患者的三叉神經(jīng)受責(zé)任血管壓迫出現(xiàn)明顯移位及萎縮征象,另有10例患者未發(fā)現(xiàn)明顯的責(zé)任血管;三維重建圖像上顯示血管-神經(jīng)接觸患者73例,8例患者的三叉神經(jīng)受壓后出現(xiàn)移位及萎縮,另有10例患者未發(fā)現(xiàn)明顯的責(zé)任血管。在二維圖像上共發(fā)現(xiàn)血管-神經(jīng)單純性接觸的面肌痙攣患者58例,6例患者的面神經(jīng)受責(zé)任血管壓迫出現(xiàn)明顯移位及萎縮征象,另有8例患者未發(fā)現(xiàn)明顯的責(zé)任血管;三維重建圖像上顯示血管-神經(jīng)接觸患者57例,7例患者的面神經(jīng)受壓出現(xiàn)移位及萎縮,另有8例患者未發(fā)現(xiàn)明顯的責(zé)任血管。以上所有患者均接受微血管減壓術(shù),圖1和圖2分別顯示1例三叉神經(jīng)痛和1例面肌痙攣患者的MRI二維圖像、三維重建圖像和術(shù)中所見(jiàn),提示三維重建識(shí)別責(zé)任血管的數(shù)量和來(lái)源以及判斷顱神經(jīng)受壓程度方面具有一定優(yōu)勢(shì)。三叉神經(jīng)痛和面肌痙攣患者二維和三維重建圖像與術(shù)中所見(jiàn)的符合率如表2~表5所示。

        3"討""論

        血管-神經(jīng)接觸/壓迫是CNCS最重要的解剖學(xué)特征,三叉神經(jīng)痛在該臨床綜合征中最為常見(jiàn),其次是面肌痙攣。顱神經(jīng)FIESTA成像和橋小腦角區(qū)血管成像能夠顯示責(zé)任血管與顱神經(jīng)的空間關(guān)系,協(xié)助神經(jīng)外科制定術(shù)前計(jì)劃,提高手術(shù)療效,降低術(shù)后并發(fā)癥的發(fā)生率""[13]"。盡管顱神經(jīng)MRI序列已得到廣泛認(rèn)可,但在二維水平觀察復(fù)雜的血管-神經(jīng)壓迫容易造成誤判,從而影響后續(xù)微血管減壓術(shù)的順利實(shí)施""[14]"。本研究采用的顱神經(jīng)曲面重建和仿真內(nèi)窺鏡均屬于三維重建技術(shù),其中曲面重建可以在同一平面顯示雙側(cè)顱神經(jīng)的完整走行,有利于觀察者全方位對(duì)比患側(cè)與健側(cè)神經(jīng)的形態(tài)學(xué)差異,提高責(zé)任血管-神經(jīng)接觸/壓迫及神經(jīng)受壓移位/萎縮判定的敏感性和準(zhǔn)確性""[15]"。仿真內(nèi)窺鏡技術(shù)能夠在一定空間范圍內(nèi)展示顱神經(jīng)和相鄰血管的形態(tài)和毗鄰關(guān)系,在三維水平多角度旋轉(zhuǎn)感興趣區(qū),可將連續(xù)的影像學(xué)圖像制作成小視頻,類似于手術(shù)時(shí)術(shù)者直視下觀察到的內(nèi)容,反映解剖結(jié)構(gòu)更加形象、逼真""[16]"。以下將對(duì)二維和三維重建技術(shù)評(píng)價(jià)責(zé)任血管數(shù)量和來(lái)源以及顱神經(jīng)受壓程度等研究結(jié)果進(jìn)行分析。

        首先,本研究發(fā)現(xiàn)三維重建技術(shù)在對(duì)顱神經(jīng)責(zé)任血管識(shí)別的準(zhǔn)確性方面優(yōu)于二維圖像。無(wú)論顱神經(jīng)FIESTA成像還是MRI血管成像,主要在二維水平觀察橋小腦角池段三叉神經(jīng)和面神經(jīng)與鄰近血管的解剖關(guān)系。這對(duì)于判斷單支責(zé)任血管對(duì)顱神經(jīng)單點(diǎn)接觸/壓迫征象的敏感性和特異性均較高,一般不易出現(xiàn)誤診和漏診,但對(duì)于多支責(zé)任血管,尤其是動(dòng)靜脈形成血管袢,混合性壓迫顱神經(jīng)多個(gè)部位時(shí)容易引起錯(cuò)誤診斷""[17]"。曲面重建和仿真內(nèi)窺鏡這類三維重建技術(shù)的最大優(yōu)勢(shì)在于全方位、多角度觀察責(zé)任血管與顱神經(jīng)的空間關(guān)系,只要診斷醫(yī)師認(rèn)真細(xì)心,很難出現(xiàn)觀察死角,因此能夠發(fā)現(xiàn)更多細(xì)小的責(zé)任血管。本研究中一個(gè)經(jīng)典案例即為復(fù)雜壓迫性三叉神經(jīng)痛,責(zé)任血管分別為小腦上動(dòng)脈和巖上靜脈,神經(jīng)外科術(shù)中發(fā)現(xiàn)小腦上動(dòng)脈形成多個(gè)血管袢,如同藤蔓纏繞在三叉神經(jīng)之上。兩名診斷醫(yī)師應(yīng)用二維圖像均未發(fā)現(xiàn)這一征象,其中一名醫(yī)師由于層面選擇不佳還遺漏了巖上靜脈對(duì)顱神經(jīng)的壓迫。當(dāng)完成顱神經(jīng)的三維數(shù)據(jù)重建,診斷醫(yī)師再次觀察這名患者的圖像時(shí),均發(fā)現(xiàn)小腦上動(dòng)脈的袢狀結(jié)構(gòu)和巖上靜脈與三叉神經(jīng)的接觸征象,說(shuō)明三維重建技術(shù)對(duì)于診斷復(fù)雜性血管-神經(jīng)壓迫價(jià)值較高,值得在臨床上開(kāi)展。

        其次,關(guān)于責(zé)任血管對(duì)顱神經(jīng)接觸/壓迫程度的判定,三維重建技術(shù)較二維圖像也具有一定優(yōu)勢(shì)""[18]"。從研究結(jié)果可以看出,對(duì)于顱神經(jīng)周圍無(wú)明顯血管接觸現(xiàn)象,以及軸位圖像上顱神經(jīng)明顯受到責(zé)任血管的壓迫推移乃至出現(xiàn)萎縮征象,觀察二維圖像一般不會(huì)出現(xiàn)誤判。但對(duì)于責(zé)任血管在斜矢狀位或斜冠狀位方向接觸/壓迫顱神經(jīng)時(shí),在三維水平多角度觀察血管-神經(jīng)壓迫征象更有意義""[19]",如果僅從二維水平觀察血管-神經(jīng)解剖關(guān)系,有時(shí)會(huì)低估顱神經(jīng)的受壓程度。此外,我們還發(fā)現(xiàn)三維重建對(duì)識(shí)別面肌痙攣的責(zé)任血管和顱神經(jīng)受壓程度的價(jià)值似乎高于三叉神經(jīng)痛。從表2與表3、表4與表5對(duì)比結(jié)果來(lái)看,與三叉神經(jīng)痛相比,三維重建在面肌痙攣患者中正確識(shí)別責(zé)任血管和顱神經(jīng)受壓程度的比例更高。據(jù)此推測(cè),面肌痙攣患者受累神經(jīng)為面神經(jīng),管徑較細(xì),加之后方緊鄰位聽(tīng)神經(jīng),有時(shí)兩者相距很近不易觀察解剖細(xì)節(jié)。同時(shí)面神經(jīng)周圍走行迂曲的血管常多于三叉神經(jīng),形成多個(gè)血管袢時(shí)更難正確判斷血管-神經(jīng)接觸/壓迫的空間關(guān)系。因此,我們認(rèn)為曲面重建和仿真內(nèi)窺鏡技術(shù)對(duì)于面肌痙攣患者的術(shù)前檢查更為必要。

        綜上所述,對(duì)于CNCS,MRI三維重建可以提高識(shí)別責(zé)任血管數(shù)量和來(lái)源的正確率,同時(shí)能夠準(zhǔn)確評(píng)估顱神經(jīng)的受壓程度,特別適用于多支責(zé)任血管對(duì)顱神經(jīng)的復(fù)雜性壓迫,對(duì)于面肌痙攣患者的術(shù)前檢查應(yīng)該首選此項(xiàng)技術(shù),從而為微血管減壓術(shù)前計(jì)劃的制定提供更為客觀的影像學(xué)依據(jù),使更多患者獲益。

        參考文獻(xiàn):

        [1] SHI X,""ZHANG X, XU L, et al. Neurovascular compression syndrome: trigeminal neuralgia, hemifacial spasm, vestibular paroxysmia, glossopharyngeal neuralgia, four case reports and review of literature[J]. Clin Neurol Neurosurg, 2022, 221: 107401.

        [2] BENDTSEN L, ZAKRZEWSKA J M, HEINSKOU T B, et al. Advances in diagnosis, classification, pathophysiology, and management of trigeminal neuralgia[J]. Lancet Neurol, 2020, 19(9): 784-796.

        [3] TRAYLOR K S, SEKULA R F, EUBANKS K, et al. Prevalence and severity of neurovascular compression in hemifacial spasm patients[J]. Brain, 2021, 144(5): 1482-1487.

        [4] BUSSE S, TAYLOR J, FIELD M. Correlation of preoperative high-resolution neurovascular imaging and surgical success in neurovascular compression syndromes[J]. World Neurosurg, 2023, 172: e593-e598.

        [5] HU M, ZHOU W, SHEN W, et al. A combination of 3D TOF MRA and FIESTA predicts surgery-needed primary trigeminal neuralgia and specific offending vessels[J]. J Integr Neurosci, 2022, 21(6): 169.

        [6] ZHU W, SHEN J, TANG T, et al. Evaluation of pre-operative neuroimaging characteristics in patients with primary hemifacial spasm as a prognostic factor of microvascular decompression[J]. Clin Neurol Neurosurg, 2020, 195: 105874.

        [7] GAMALELDIN O A, DONIA M M, ELSEBAIE N A, et al. Role of fused three-dimensional time-of-flight magnetic resonance angiography and 3-dimensional t2-weighted imaging sequences in neurovascular compression[J]. World Neurosurg, 2020, 133: e180-e186.

        [8] PHAM H D, DANG T H, DUONG T K, et al. Predictability of fused 3D-T2-SPACE and 3D-TOF-MRA images in identifying conflict in trigeminal neuralgia[J]. J Pain Res, 2021, 14: 3421-3428.

        [9] CRUCCU G, DI S G, TRUINI A. Trigeminal neuralgia[J]. N Engl J Med, 2020, 383(8): 754-762.

        [10] HAO Y, ZHANG W, CHEN M, et al. Sensitivity of magnetic resonance tomographic angiography for detecting the degree of neurovascular compression in trigeminal neuralgia[J]. Neurol Sci, 2020, 41(10): 2947-2951.

        [11] ZHANG X, PENG L, LIU D. Radiofrequency therapies for trigeminal neuralgia: a systematic review and updated meta- analysis"[J]. Pain Physician, 2022, 25(9): E1327-E1337.

        [12] CHAI S, WU J, CAI Y, et al. Early lateral spread response loss during microvascular decompression for hemifacial spasm: its preoperative predictive factors and impact on surgical outcomes[J]. Neurosurg Rev, 2023, 46(1): 174.

        [13] DONAHUE J H, ORNAN D A, MUKHERJEE S. Imaging of vascular compression syndromes[J]. Radiol Clin North Am, 2017, 55(1): 123-138.

        [14] 胡瀟尹, 李蕾. 不同MRI序列對(duì)原發(fā)性三叉神經(jīng)痛及偏側(cè)面肌痙攣的診斷價(jià)值[J]. 徐州醫(yī)科大學(xué)學(xué)報(bào), 2020, 40(7): 502-504.

        HU X Y, LI L. Diagnostic value of different MRI sequences in primary trigeminal neuralgia and hemifacial spasm[J]. Acta Acad Med Xuzhou, 2020, 40(7): 502-504.

        [15] 陳利軍, 陳士新, 孫澤棟, 等. 雙激發(fā)平衡式穩(wěn)態(tài)自由進(jìn)動(dòng)序列曲面重建在血管壓迫性三叉神經(jīng)痛及面肌痙攣的應(yīng)用價(jià)值[J].磁共振成像, 2015, 6(10): 744-749.

        CHEN L J, CHEN S X, SUN Z D, et al. Application value of doubly excited balance-SSFP sequence curvature plane reconstruction in vascular compressive trigeminal neuralgia and hemifacial spasm[J]. Chin J Magn Reson Imaging, 2015, 6(10): 744-749.

        [16] 石海亮, 李洋, 郭文昌, 等. 神經(jīng)血管三維重建在術(shù)前診斷VBD合并HFS患者神經(jīng)血管關(guān)系和責(zé)任血管中的應(yīng)用[J]. 中華神經(jīng)醫(yī)學(xué)雜志, 2020(12): 1194-1199.

        SHI H L, LI Y, GUO W C, et al. Neurovascular three-dimensional reconstruction in preoperative diagnosis of neurovascular relations and offending arteries in patients with vertebrobasilar dolichoectasia complicated with hemifacial spasm[J]. Chin J Neuromedicine, 2020(12): 1194-1199.

        [17] ZAWY ALSOFY S, WELZEL SARAVIA H, NAKAMURA M, et al. Virtual reality-based evaluation of neurovascular conflict for the surgical planning of microvascular decompression in trigeminal neuralgia patients[J]. Neurosurg Rev, 2021, 44(6): 3309-3321.

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        [19] MIAO X, YU M, WANG Z. MRI study on the relationship between nerve and blood vessel in unilateral angiogenic trigeminal neuralgia[J]. Curr Med Imaging, 2023, 19(6): 605-611.

        (編輯"張"敏)

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