低场强术中磁共振成像在经鼻蝶窦垂体大腺瘤显微手术中的应用

目的 探讨低场强术中磁共振成像(iMRI)在经鼻蝶窦垂体大腺瘤显微手术中的应用.方法 在82例垂体大腺瘤的经鼻蝶窦显微手术中,采用0.15T iMRI系统进行术中实时引导.以术后早期高场强MRI为标准对照,定量分析iMRI的成像准确性,并就低场强iMRI对肿瘤切除程度和治疗结果 的影响进行分析.结果 在iMRI的辅助下,82例垂体大腺瘤的全切率从61.0%提高到81.7%.低场强iMRI的成像准确率达86.6%,但对于侵犯鞍旁结构的肿瘤的成像准确率明显低于其他类型垂体大腺瘤的成像准确率(53.3%vs 94.0%,P<0.001).结论 iMRI导航技术的应用,'为经蝶窦垂体大腺瘤手术进程的动态引导及手术结果 的实时判断提供了客观的依据,提高了肿瘤的全切率及手术的精确性与安全性.     

术中磁共振实时影像导航下穿刺活检术的临床初步应用

目的 探讨术中磁共振(iMRI)影像导航应用于穿刺活检术的临床初步经验、优势与不足.方法 在0.15T PoleStar N-20 iMRI实时影像引导下,对6例颅内占位性质不明患者进行穿刺活检术.结果 6例均获得组织病理学诊断,活检阳性率为100%;1例颅内多发占位患者术后并发左基底节活检区域局限性血肿.结论 iMRI影像导航能及时纠正术中脑移位,即只有当iMRI确定穿刺针已位于病灶内才进行活检,从而有利于提高活检阳性率,减少术后并发症.     

Intraoperative MRI for transphenoidal procedures: short-term outcome for 100 consecutive cases

Background

The majority of pituitary lesions are benign and can be cured with complete surgical resection. However, the transsphenoidal technique (the most common approach for pathology in this region) is limited by poor visualization and anatomical constraints. This can lead to incomplete tumor resection and thus increased recurrence rates. The use of iMRI during these procedures offers the advantage of radiographic confirmation during the procedure and may improve extent of resection. We reviewed our experience with this technology in 100 consecutive cases and compared the outcomes to published results.

Methods

100 patients were treated via transnasal transsphenoidal approach using the GE Signa SP 0.5 Tesla (double doughnut design) iMRI system between July 2002 and August 2009 and followed prospectively. Intraoperative findings, imaging results, postoperative MRI and clinical outcome were evaluated to determine the extent of tumor resection, monitor for recurrence and determine outcome.

Results

There were 100 patients studied, 81 macroadenomas, 9 microadenomas, and 10 other pathological diagnosis. The average extent of resection was 96% with gross total resection based on iMRI in 76 patients (76%). Four patients (4%) all with macroadenomas greater than 4 cm experienced major perioperative complications (hydrocephalus 2, thalamic infarct 1, major arterial bleeding 1), six patients (6%) developed post-operative CSF leaks, one patient (1%) had post-operative worsening of visual fields, and five patients (5%) had abdominal fat graft infections. Nine patients (9%) including five with known residual tumor required post-operative adjuvant treatment during the follow-up period secondary to either disease progression or failure to achieve endocrinological cure.

Conclusions

iMRI-guided transsphenoidal pituitary surgery provides the surgeon with immediate radiographic feedback during the procedure and aides in overcoming the limitations in direct visualization during such procedures. As a result of this it may enable surgeons to perform such procedures with fewer complications and increased rate of gross total resection. However, the impact of this technology on long-term tumor control still needs to be determined with further follow-up.     

术中磁共振影像神经导航手术的临床初步应用

目的:探讨术中核磁共振影像神经导航(intraoperative MR image-based neuronavigation)技术在神经外科手术的意义。方法:应用PoleStarN-20术中磁共振成像(iMRI)神经导航系统施行神经外科手术22例。对其临床资料、iMRI情况,及其对手术进程和手术结果的影响进行分析。结果:22例手术中,经鼻-蝶垂体瘤切除术10例,幕上开颅肿瘤切除术10例,幕下开颅肿瘤切除术2例。iMRI扫描次数从2～5次不等,平均2.6次。共有9例术中扫描发现有肿瘤残留,其中8例(36.4%),需做进一步的切除,最终肿瘤的全切率从60%提高到86.4%。无与iMRI相关的并发症。结论:iMRI神经导航技术的应用,为神经外科手术入路的选择、皮肤切口的设计、手术进程的指导及手术结果的实时判断提供了客观的依据,从而在提高手术的精确性和安全性的同时,提高了颅脑肿瘤的全切率。     

低场强术中磁共振环境下的神经电生理监测

目的 探讨低场强iMRI环境下神经电生理监测(IOM)的操作特点与临床初步体会.方法 分析9例功能区脑肿瘤10M及iMRI的联合应用情况.采集IOM基线,与iMRI环境下的波形比较;记录iMRI影像畸变及电刺激相关不良事件.术后早期复查MRI评估肿瘤切除隋况.结果 9例行IOM均获得稳定波形.1例前置放大器冈磁电效应损坏,未观察到热损伤或电极移动损伤.iMRI 7例局部信号缺失;3例发现肿瘤残余.术后随访MRI 7例全切,2例次全切除,与iMRI判断一致.结论 低场强iMRI环境下,IOM可获得稳定波形.二者联合应用,有助于病变安全切除.     

Prospective study on the efficacy of low-field intraoperative magnetic resonance imaging in neurosurgical operations

Background and purposeThe application of intraoperative magnetic resonance imaging (iMRI) is related to a series of challenges of both a technical and an organizational nature. We present our experience in the application of low-field iMRI in everyday neurosurgical practice.Material and methodsA group of 58 patients operated on using low-field iMRI was subject to prospective controlled observation. The significance of differences in the range of preparation time, duration and direct operation results between the iMRI group and controls was analysed. The influence of epidemiological and demographic factors and technical aspects related to iMRI application on direct outcome of the surgery was assessed.ResultsTwenty-eight tumour resections using craniotomy, 17 transsphenoidal resections of pituitary adenomas and 13 stereotactic procedures were conducted in the group of 24 men and 34 women operated on using iMRI. The control group was not significantly different in terms of epidemiological and demographic factors. The preparation and operation times were significantly longer in the iMRI group (p < 0.001 and p = 0.002, respectively). Longer duration of the surgery was not related to an increased frequency of complications. A higher percentage of postoperative improvement in neurological status (31% vs. 14%, p = 0.045), lower complication percentage (10% vs. 28%, p = 0.03) and a similar time of hospitalization (13 ± 7 vs. 12 ± 4 days, p = 0.33) were noted in the iMRI group.ConclusionsThe application of low-field iMRI prolongs the duration of neurosurgical procedures but does not negatively influence their safety. It is associated with above-average functional results and a lower percentage of total complications.     

PoleStar N20术中磁共振神经导航系统的导航准确性研究

目的 研究PoleStar N20术中磁共振影像（iMRI）神经导航系统导航的准确性及影响因素，为临床应用提供指导。方法 应用塑料-有机玻璃立柱插板体模，分别测定不同空间靶点、手术体位、扫描序列、噪音水平、磁体移动等对导航准确性的影响。结果 导航准确性与扫描序列、噪音水平、扫描层厚呈显著性相关，与靶点空间位置、体位、手术床和磁体移动等不相关。结论 PoleStar N20 iMRI神经导航系统导航准确性可靠，受外界影响小，可满足临床应用所需。     

Low field intraoperative MRI-guided surgery of gliomas: A single center experience

Introduction

The aim of this article is to report on our experience in using a low field intraoperative MRI (iMRI) system in glioma surgery and to summarize the hitherto use and benefits of iMRI in glioma surgery.

Patients and methods

Between July 2004 and May 2009, a total of 103 patients harboring gliomas underwent tumor resection with the use of a mobile low field iMRI in our institution. Surgeries were performed as standard micro-neurosurgical procedures using regular instrumentarium. All patients underwent early postoperative high field MRI to determine the extent of resection. Adjuvant treatment was conducted according to histopathological grading and standard of care.

Results

All tumors could be reliably visualized on intraoperative imaging. Intraoperative imaging revealed residual tumor tissue in 51 patients (49.5%), leading to further tumor resection in 31 patients (30.1%). Extended resection did not translate into a higher rate of neurological deficits. When analyzing survival of patients with glioblastoma, patients undergoing complete tumor resection did significantly better than patients with residual tumor (50% survival rate at 57.8 weeks vs. 33.8 weeks, log rank test p = 0.003), while younger age did not influence survival (p = 0.12).

Conclusion

Low field iMRI is a helpful tool in modern neurosurgery and facilitates brain tumor resection to a maximum safe extent. Its use translates into a better prognosis for these patients with devastating tumors. Future studies covering the use of iMRI will need to be conducted in a prospective, randomized fashion to prove the true benefit of iMRI in glioma surgery.     

Neurosurgical tools to extend tumor resection in pediatric hemispheric low-grade gliomas: iMRI

Introduction

The treatment of low-grade gliomas (LGGs) in pediatric age is still controversial. However, most authors report longer life expectancy in case of completely removed cerebral gliomas. Intraoperative magnetic resonance imaging (iMRI) is increasingly utilized in the surgical management of intra-axial tumor in adults following the demonstration of its effectiveness. In this article, we analyze the management of LGG using iMRI focusing on its impact on resection rate and its limits in the pediatric population.

Methods

We performed review of the literature regarding the treatment of LGG using iMRI focusing on its impact on resection rate and its limits in the pediatric population. Some exemplary cases are also described.

Results

Intraoperative MRI allowed extension of tumor resection after the depiction of residual tumor at the intraoperative imaging control from 21 to 52 % of the cases in the published series. Moreover, the early reoperation rate was significantly lower when compared with the population treated without this tool (0 % vs 7–14 %). Some technical difficulties have been described in literature regarding the use of iMRI in the pediatric population especially for positioning due to the structure of the headrest coil designed for adult patients.

Conclusion

The analysis of the literature and our own experience with iMRI in children indicates significant advantages in the resection of LGG offered by the technique. All these advantages are obtained without elongation of the surgical times or increased risk for complications, namely infection. The main limit for a wider diffusion of iMRI for the pediatric neurosurgical center is the cost required, for acquisition of the system, especially for high-field magnet, and the environmental and organizational changes necessary for its use.

     

Awake language mapping and 3-Tesla intraoperative MRI-guided volumetric resection for gliomas in language areas

The use of both awake surgery and intraoperative MRI (iMRI) has been reported to optimize the maximal safe resection of gliomas. However, there has been little research into combining these two demanding procedures. We report our unique experience with, and methodology of, awake surgery in a movable iMRI system, and we quantitatively evaluate the contribution of the combination on the extent of resection (EOR) and functional outcome of patients with gliomas involving language areas. From March 2011 to November 2011, 30 consecutive patients who underwent awake surgery with iMRI guidance were prospectively investigated. The EOR was assessed by volumetric analysis. Language assessment was conducted before surgery and 1 week, 1 month, 3 months and 6 months after surgery using the Aphasia Battery of Chinese. Awake language mapping integrated with 3.0 Tesla iMRI was safely performed for all patients. An additional resection was conducted in 11 of 30 patients (36.7%) after iMRI. The median EOR significantly increased from 92.5% (range, 75.1–97.0%) to 100% (range, 92.6–100%) as a result of iMRI (p < 0.01). Gross total resection was achieved in 18 patients (60.0%), and in seven of those patients (23.3%), the gross total resection could be attributed to iMRI. A total of 12 patients (40.0%) suffered from transient language deficits; however, only one (3.3%) patient developed a permanent deficit. This study demonstrates the potential utility of combining awake craniotomy with iMRI; it is safe and reliable to perform awake surgery using a movable iMRI.     

低磁场术中磁共振导航的融合弥散张量成像功能研究

目的:探讨低磁场术中磁共振成像(iMRI)导航手术利用弥散张量成像(DTI)的可能性和应用价值。方法:19例涉及锥体束的脑肿瘤患者,应用多影像融合技术将术前DTI与iMRI影像融合指导手术,术中利用非刚体配准计算法和手动点配准融合技术把修正的DTI逐层与更新的iMRI影像融合,并导航手术。术后随访肢体运动功能。结果:成功获得DTI变形预测结果,肿瘤全切除率63.2%,次全切除率15.8%,肢体运动较术前好转或维持术前症状者84.2%。结论:iMRI与DTI融合导航手术可实时提供病灶与邻近锥体束间三维可视化解剖信息,提高肿瘤切除率,降低术后致残率。     

高场强术中磁共振对脑胶质瘤切除程度及手术策略的影响

目的 评价高场强术中磁共振(iMRI)对脑胶质瘤手术切除程度及手术策略的影响.方法 解放军总医院神经外科自2009年10月至2010年6月将高场强iMRI系统应用于胶质瘤切除术患者106例,术前了解术者的切除意图(全切、次全切、大部切除),术前1 d患者常规行MRI扫描,应用影像数据和软件计算术前肿瘤体积,术中常规使用神经导航手术,依据术者的需求采集影像.必要时行iMRI扫描计算术中残余肿瘤体积和肿瘤体积切除百分比,分析使用iMRI对肿瘤切除程度、手术策略的影响.结果 术前计划全切48例,次全切41例,大部切除17例.术中第一次扫描示42例(39.6%)完全切除,64例(60.4%)仍有残留,其中25例由于肿瘤与重要功能区或重要传导束紧邻而未作进一步切除,其余39例(36.8%)改进手术策略,标记出残留肿瘤后进一步手术,25例(23.6%)胶质瘤最终全切除,肿瘤体积切除百分比由(76.5±20.5)%提高到(94.2±8.7)%,差异有统计学意义(U=2.000,P=0.000);最终实际全切67例,次全切25例,大部切除14例,全切率有所提高.106例患者平均肿瘤体积切除百分比由第一次扫描时的(86.3±20.2)%提高到最终扫描时的(93.6±12.4)%,差异有统计学意义(U=4.000,p=0.000).结论 高场强iMRI的应用可显著提高脑胶质瘤的切除程度,改进手术策略.

Abstract：

Objective To evaluate the impact of high-field intraoperative magnetic resonance imaging (iMRI) on extension of resection and surgical strategy modification for glioma surgery. Methods One hundred and six patients, admitted to our hospital from October 2009 to June 2010, were performed glioma resections with the help of high-field iMRI. Questionnaires were filled and collected prospectively to record the surgeons' intention on the extent of resection (EoR) and the intra-operative estimation of EoR before every iMRI scan. The scan imagings were collected based on the request of the surgeon, and the percentage of tumor removal was calculated according to the iMRI data. The impact of iMRI on the tumor EoR and modification of surgical strategy was then evaluated. Results Preoperatively, 48 patients were intended to achieve total tumor removal, 41 sub-total tumor removal, and 17 partial removal. The first intraoperative MRI scan revealed that 42 (39.6%) patients achieved complete resection, while residual tumors were depicted in 64 (60.4%).Further tumor resections were performed in 39 patients (36.8%), but the other 25 patients could not perform further resection for their tumors were closely neighbored to the important functional region or important tracts. Finally, in the whole cohort, the percentage of tumor resection volume was increased from (76.5±20.5)% to (94.2±8.7)%, with significant differences (U=2.000, P=0.000); 67 patients got complete removal, 25 sub-total removal and 14 partial removal; The total removal rate was significantly increased from 45.3% (48/106) to 63.2% (67/106): the average percentage of tumor resection volume in the second time of scan ([93.6±12.41%) was obviously increased as compared with that in the first scan ([86.3±20.21%, U=4.000, P=0.000). Conclusion High-field iMRI may increase the extent of glioma resection, and has significant impact on the intraoperative modification of the surgical strategy.     

功能神经导航和术中磁共振引导下精确切除毗邻大脑运动功能区的致(癎)病变

目的 评估功能神经导航和术中MRI引导对毗邻运动功能区致(癎)病变切除术的效果.方法 回顾性分析接受神经导航引导手术的14例癫(癎)病人,其中10例采用术中MRI.术前MRI扫描,融合影像,设计病变切除范围及入路,三维计划输入导航系统并投射至手术显微镜辅助手术.术中复查MRI,对残余病变重新定位,实施手术切除.术后定期进行随访.结果 病人均成功实施了功能神经导航,致(癎)病变、运动区皮质和锥体束投射在手术显微镜下,精确切除病变,同时运动区皮质和锥体束获得有效保护;术中MRI末次扫描提示致(癎)灶病变的切除范围达到术前计划.术后随访6～24个月,癫(癎)发作控制达Engel Ⅰ级12例,Engel Ⅱ级2例.未出现肢体肌力下降.结论 对于毗邻运动功能区的致(癎)病变,通过功能神经导航和术中MRI精准定位病灶和功能区,可以达到精准切除病变并保护正常脑功能的目的.     

高场强术中磁共振成像对脑胶质瘤全切率的影响及其评估

目的 探讨高场强术中磁共振成像(iMRI)对脑胶质瘤手术全切率的影响及其意义.方法 自2009年2月至6月应用高场强iMRI施行脑胶质瘤切除术40例.运用术中影像数据对胶质瘤体积及全切率做回顾性分析.结果 术中第1次行iMRI扫描仅10例胶质瘤完全切除,30例肿瘤仍有残留,23例行进一步切除,其中21例胶质瘤最终全切除.最终肿瘤的伞切率从25%提高到78%,残存肿瘤的体积也明显下降.结论 高场强iMRI的应用显著提高脑胶质瘤手术的全切率.     

Resective surgery for focal cortical dysplasia in children: a comparative analysis of the utility of intraoperative magnetic resonance imaging (iMRI)

Purpose

Seizure freedom following resection of focal cortical dysplasia (FCD) correlates with complete resection of the dysplastic cortical tissue. However, difficulty with intraoperative identification of the lesion may limit the ability to achieve the surgical objective of complete extirpation of these lesions. Intraoperative magnetic resonance imaging (iMRI) may aid in FCD resections. The objective of this study is to compare rates of postoperative seizure freedom, completeness of resection, and need for reoperation in patients undergoing iMRI-assisted FCD resection versus conventional surgical techniques.

Methods

We retrospectively reviewed the medical records of pediatric subjects who underwent surgical resection of FCD at Children’s National Medical Center between March 2005 and April 2015.

Results

At the time of the last postoperative follow-up, 11 of the 12 patients (92 %) in the iMRI resection group were seizure free (Engel Class I), compared to 14 of the 42 patients (33 %) in the control resection group (p = 0.0005). All 12 of the iMRI patients (100 %) achieved complete resection, compared to 24 of 42 patients (57 %) in the control group (p = 0.01). One (8 %) patient from the iMRI-assisted resection group has required reoperation, compared to 17 (40 %) patients in the control resection group.

Conclusion

Our results suggest that the utilization of iMRI during surgery for resection of FCD results in improved postoperative seizure freedom, completeness of lesion resection, and reduction in the need for reoperation.

     

Resection of subependymal giant cell astrocytoma guided by intraoperative magnetic resonance imaging and neuronavigation

Purpose

Subependymal giant cell astrocytoma (SEGA) is a rare, benign tumor that occurs mainly in children; complete resection can achieve cure. Guidance of surgery by combined intraoperative magnetic resonance imaging (iMRI) and functional neuronavigation is reported to achieve more radical resection and reduced complications. However, reports about the resection of SEGA with such guidance are rare. We report here our preliminary experience of the resection of SEGA guided by iMRI and neuronavigation, focusing on the feasibility, benefits, and pitfalls of this combination of techniques.

Methods

We performed resection of SEGA guided by combined iMRI and functional neuronavigation in seven children. The first iMRI was performed when the surgeon believed that the tumor had been completely resected; the last iMRI was performed immediately after closure. Additional scans were performed as needed.

Results

Successful resection was achieved in all seven patients using this combination of techniques. The iMRI scans detected residual tumor in three patients and a large, remote epidural hematoma in one patient. Further resection or other surgery was performed in these four patients. Complete resection was eventually achieved in all patients. There were no cases of surgery-related neurological dysfunction, except transient memory loss in one patient. No recurrence of tumor or hydrocephalus was observed in any patients during the follow-up period.

Conclusions

Resection of SEGA in children guided by combined iMRI and neuronavigation is feasible and safe. This combination of techniques enables a higher complete resection rate and reduces brain injury and other unexpected events during surgery.     

经单鼻孔蝶窦入路神经内镜下切除垂体腺瘤

目的 介绍经单鼻孔蝶窦入路神经内镜下切除垂体腺瘤的经验及体会。方法 对16例垂体腺瘤病人采用经单鼻孔蝶窦入路行神经内镜下垂体腺瘤切除术，其中微腺瘤3例，大腺瘤12例，巨型腺瘤1例。功能性腺瘤14例，其中PRL腺瘤6例，GH腺瘤4例，混合性（PRL GH）腺瘤4例；无功能性腺瘤2例。结果 内镜下全切除肿瘤14例，近全切1例，大部切除1例；无死亡，无脑出血、视神经损伤、脑脊液鼻漏及其他鼻腔并发症发生；2例术后出现一过性多尿，经治疗术后1周恢复正常。随访3-6个月，原有症状均有所改善，异常增高的激素水平均降至正常，MRI检查显示下一例肿瘤复发。结论 内镜下经单鼻孔蝶窦入路垂体腺瘤切除术具有深部照明好，鼻腔结构损伤小，切除肿瘤彻底，术后并发症少，病人恢复快等优点。     

Intraoperative magnetic resonance imaging for cerebral cavernous malformations: When is it maybe worth it?

ObjectiveIntraoperative magnetic resonance imaging (iMRI) can be useful for cerebral cavernous malformations (CCM) surgery. However, literature on this topic is scarce. We aim to investigate its clinical utility and propose criteria for the selection of patients who may benefit the most from iMRI.MethodsFrom 2017 to 2019, all patients with CCMs who required surgery assisted with iMRI were included in the study. Clinical and radiological features were analyzed. Outcome measures included the need for an immediate second-look resection and clinical course in early post-surgery -Timepoint 1- (Tp1) and at the 6-to-12-month follow-up -Timepoint2- (Tp2).ResultsOut of 19 patients with 20 CCMs, 89% had bleeding in the past, and in 75% the CCM affected an eloquent area. According to the iMRI results, an immediate second-look resection was needed in 16% of them. In one patient, a remnant was not seen on iMRI. The mRS worsened in the immediate post-surgical exam (median, 1; IQR, 1) with improvements on the 6-month visit (median, 1; IQR, 2), (p = 0.018). When comparing the outcome of patients with and without symptoms at baseline, the latter fared better at Tp2 (p = 0.005).ConclusionsiMRI is an intraoperative imaging tool that seems safe for CCM surgery and might reduce the risk of lesion remnants. In our series, it allowed additional revision for further resection in 16% of the patients. In our experience, iMRI may be especially useful for lesions in eloquent areas, those with a significant risk of brain shift and for large CCMs.     

经蝶入路显微手术切除鞍膈下颅咽管瘤

目的探讨鞍膈下颅咽管瘤经蝶入路显微手术治疗的效果。方法2003年1月至2013年3月显微手术治疗290例颅咽管瘤,其中29例为鞍膈下颅咽管瘤,行经蝶入路显微手术治疗。术后随访3~116月,采用MRI评估肿瘤切除程度和复发。结果肿瘤全切24例,全切率82.8%;次全切除5例。无手术死亡患者。术后6例出现脑脊液鼻漏,2例行手术修补,4例行腰穿置管,均治愈。术后6例患者出现一过性尿崩,2例出现电解质紊乱,3月后恢复正常。14例术前视力下降患者,12例术后得到不同程度改善。8例术前高泌乳素水平患者术后恢复正常,5例新出现垂体功能障碍,3月后复查恢复正常。1例复发再次经蝶入路显微手术切除肿瘤。结论鞍膈下颅咽管瘤经蝶入路手术可安全切除,创伤小,疗效好。     

术中磁共振成像在经鼻-蝶入路垂体瘤切除术中的应用研究

目的探讨术中磁共振成像结合神经影像导航系统在经鼻-蝶入路垂体肿瘤切除术中的应用价值。方法采用术中MRI扫描辅助神经导航系统指导经鼻-蝶入路垂体肿瘤切除范围,分析术中MRI对手术过程和患者预后的影响。结果术中MRI扫描系统平均扫描(2.11±0.41)次,所需时间15～20min/次;手术时间共延长47～60min,平均(51.20±0.66)min。38例患者术中MRI共发现11例存在肿瘤残余,其中8例于更新神经导航计划后进一步扩大手术范围全切除肿瘤,3例因肿瘤质地坚韧且与周围解剖结构粘连紧密,仅行部分切除;初次全切除率为71.05%(27/38),在术中MRI导航系统辅助下最终全切除率达92.10%(35/38),提高了21.05%(8/38;χ2=4.290,P=0.018)。术后无一例发生与磁共振检查相关性并发症。结论经鼻-蝶入路垂体肿瘤切除术中应用MRI结合神经导航技术,为指导手术进程及实时判断手术效果提供了客观依据,从而避免了因术中脑组织漂移造成的术前导航偏差,提高肿瘤全切除率。