An augmented reality navigation system for pediatric oncologic surgery based on preoperative CT and MRI images

Purpose

In pediatric endoscopic surgery, a limited view and lack of tactile sensation restrict the surgeon's abilities. Moreover, in pediatric oncology, it is sometimes difficult to detect and resect tumors due to the adhesion and degeneration of tumors treated with multimodality therapies. We developed an augmented reality (AR) navigation system based on preoperative CT and MRI imaging for use in endoscopic surgery for pediatric tumors.

Methods

The patients preoperatively underwent either CT or MRI with body surface markers. We used an optical tracking system to register the reconstructed 3D images obtained from the CT and MRI data and body surface markers during surgery. AR visualization was superimposed with the 3D images projected onto captured live images. Six patients underwent surgery using this system.

Results

The median age of the patients was 3.5 years. Two of the six patients underwent laparoscopic surgery, two patients underwent thoracoscopic surgery, and two patients underwent laparotomy using this system. The indications for surgery were local recurrence of a Wilms tumor in one case, metastasis of rhabdomyosarcoma in one case, undifferentiated sarcoma in one case, bronchogenic cysts in two cases, and hepatoblastoma in one case. The average tumor size was 22.0 ± 14.2 mm. Four patients were treated with chemotherapy, three patients were treated with radiotherapy before surgery, and four patients underwent reoperation. All six tumors were detected using the AR navigation system and successfully resected without any complications.

Conclusions

The AR navigation system is very useful for detecting the tumor location during pediatric surgery, especially for endoscopic surgery.     

Extended,virtual and augmented reality in thoracic surgery: a systematic review

 Open in a separate windowOBJECTIVESExtended reality (XR), encompassing both virtual reality (VR) and augmented reality, allows the user to interact with a computer-generated environment based on reality. In essence, the immersive nature of VR and augmented reality technology has been warmly welcomed in all aspects of medicine, gradually becoming increasingly feasible to incorporate into everyday practice. In recent years, XR has become increasingly adopted in thoracic surgery, although the extent of its applications is unclear. Here, we aim to review the current applications of XR in thoracic surgery.METHODSA systematic database search was conducted of original articles that explored the use of VR and/or augmented reality in thoracic surgery in EMBASE, MEDLINE, Cochrane database and Google Scholar, from inception to December 2020.RESULTSOur search yielded 1494 citations, of which 21 studies published from 2007 to 2019 were included in this review. Three main areas were identified: (i) the application of XR in thoracic surgery training; (ii) preoperative planning of thoracic procedures; and (iii) intraoperative assistance. Overall, XR could produce progression along the learning curve, enabling trainees to reach acceptable standards before performing in the operating theatre. Preoperatively, through the generation of 3D-renderings of the thoracic cavity and lung anatomy, VR increases procedural accuracy and surgical confidence through familiarization of the patient’s anatomy. XR-assisted surgery may have therapeutic use particularly for complex cases, where conventional methods would yield inadequate outcomes due to inferior accuracy.CONCLUSIONXR represents a salient step towards improving thoracic surgical training, as well as enhancing preoperative planning and intraoperative guidance.     

早期乳腺癌保留乳房手术62例疗效评价

目的探讨早期乳腺癌保留乳房手术治疗疗效。方法回顾性分析1996～2004年经治的62例早期乳腺癌实施保乳手术治疗疗效。结果全部病人手术过程顺利,近期乳房外形保持良好。术后随访1～8年(平均2年),无局部复发、远处转移和死亡病例。无放疗后合并症。结论保乳手术治疗早期乳癌的近、远期疗效满意。术前严格掌握手术适应证,术后规范的综合治疗,是保乳手术获得良好疗效的保证。     

Conservative treatment of breast cancer: Milan experience

Summary Background The conservative treatment of operable breast cancer has gradually become well-established during the last 20 years as it offers adequate loco-regional control of the disease and saves the brest. Moreover, larger, demolishing operations have not shown to decrease the risk of distant metastases. Methods Four prospective, randomized trials (Milan Trials I to IV) have been conducted at the Department of Surgical Oncology of the Istituto Nazionale Tumori Milan since 1973 comparing the radical Halsted approach in operable breast cancer to conservative treatments combining extensive breast resection and various radiotherapies. Results Data analysis lends force to the conservative treatment concept, showing that an extensive breast resection, defined as quadrantectomy, together with radiotherapy are a safe procedure that results in a long term survival comparable to that after Halsted's mastectomy. Furthermore, the studies reveal that too limited a resection (lumpectomy) and withdrawal of radiotherapy increase the risk of local recurrence. In women older than 55 years, however, quadrantectomy without radiotherapy yields good results. Young age and the presence of an extensive intraductal component are further, signficant and important risk factors of local recurrence. Conclusions If attention is paid to the defined risk factors and adjuvant therapeutic regimes the conservative surgical treatment of breast cancer yields excellent long term results.      

Real world usability analysis of two augmented reality headsets in visceral surgery

Recent developments in the field of augmented reality (AR) have enabled new use cases in surgery. Initial set‐up of an appropriate infrastructure for maintaining an AR surgical workflow requires investment in appropriate hardware. We compared the usability of the Microsoft HoloLens and Meta 2 head mounted displays (HMDs). Fifteen medicine students tested each device and were questioned with a variant of the System Usability Scale (SUS). Two surgeons independently tested the devices in an intraoperative setting. In our adapted SUS, ergonomics, ease of use, and visual clarity of the display did not differ significantly between HMD groups. The field of view (FOV) was smaller in the Microsoft HoloLens than the Meta 2 and significantly more study subjects (80% vs. 13.3%; P < 0.001) felt limited through the FOV. Intraoperatively, decreased mobility due to the necessity of an AC adapter and additional computing device for the Meta 2 proved to be limiting. Object stability was rated superior in the Microsoft HoloLens than the Meta 2 by our surgeons and lead to increased use. In summary, after examination of the Meta 2 and the Microsoft HoloLens, we found key advantages in the Microsoft HoloLens which provided palpable benefits in a surgical setting.     

早期乳腺癌36例行保乳手术治疗体会

目的 总结早期乳腺癌施行保留乳房的根治术的治疗效果。方法 分析2002年1月～2005年12月我科选择开展的保乳手术的36例乳腺癌Ⅰ、Ⅱa患者的近期治疗效果。结果 本组患者均行保留乳房的乳腺癌根治术，术后联合化疗、放疗、内分泌治疗均获得较满意的效果。结论 早期乳腺癌行保乳手术联合放、化疗可达到与传统根治手术相同的近期效果，并具有患者心理打击小、美容效果好的优点。     

乳房整形技术在乳腺癌保乳手术中的应用效果分析

目的：探究分析在乳腺癌保乳手术当中,乳房整形手术的应用临床效果。方法：选自我院2010年～2012年收治的在保乳手术当中应用乳房整形手术的患者共50例,对其,I盘床资料进行回顾性分析,对患者术后美容效果进行调查。结果：全部患者均成功完成手术,术后对患者进行随访,随访时间为（6～12）个月,无患者出现局部或者区域淋巴结肿瘤复发迹象;患者手术后乳房美容效果优良率为92％（46／5O）。结论：乳腺癌患者可以通过乳房整形技术进行保乳治疗,该手术方法有着安全高效的优点,手术之后患者乳房外形以及整体美容整体满意程度较高,值得临床推广。     

Periareolar Approach in Oncoplastic Breast Conservative Surgery

Breast cancer represents the most frequent cancer in female population. Nowadays breast conservative surgery (BCS) is an accepted option for breast malignancies, and its indications has been extended thanks to the advent of oncoplastic surgery, reducing both mastectomy and re‐excision rate, avoiding at the same time breast deformities. From January 2008 to November 2011, 84 women underwent BCS with periareolar approach for oncoplastic volume replacement. We divided patients into four groups analyzing breast size and resection volume (Group 1: small‐moderate sized breast with resection <20%; Group 2: small‐moderate sized breast with resection >20%; Group 3: big sized breast with resection <20%; Group 4: big sized breast with resection >20%). We evaluated patients’ satisfaction regarding final esthetic outcome using the specific module “Satisfaction with outcome” of the Breast‐Q questionnaire 1 year after surgery. The mean age was 52.1 years, and the mean follow‐up was 11.2 months. During the follow‐up, 12 patients have been lost. We obtained high satisfaction mean value with Breast‐Q questionnaire in each group: 75.8 in group 1, 63.4 in group 2, 81.1 in group 3, 69.7 in group 4. Periareolar approach as oncoplastic volume replacement technique is useful in correction of breast deformity after BCS: it is a versatile technique that can be easily adapted for any breast tumor location and for wide glandular resection.     

New augmented reality and robotic based methods for head-surgery

Within the framework of the collaborative research centre "Information Technology in Medicine--Computer and Sensor-Aided Surgery" (SFB414) new methods for intraoperative computer assistance of surgical procedures are being developed. The developed tools will be controlled by an intraoperative host which provides interfaces to the electronic health record (EHR) and intraoperative computer assisted instruments.The interaction is based on standardised communication protocols. Plug & work functions will allow easy integration and configuration of new components. Intraoperative systems currently under development are intraoperative augmented reality (AR) using a projector and via a microscope, a planning system for definition of complex trajectories and a surgical robot system. The developed systems are under clinical evaluation and showing promising results in their application.     

肿瘤整形技术对早期乳腺癌保乳手术患者美容效果及预后的影响

探讨对早期乳腺癌患者应用乳腺肿瘤整形保乳术治疗对其术后乳房美观度及预后的影响。方法 选取我院2019年3月-2021年6月收治的60例早期乳腺癌患者为研究对象,随机分为对照组和观察组,每组30例。对照组采用常规保乳术治疗,观察组采用乳腺肿瘤整形保乳术治疗,比较两组术后乳房美观度和预后状况。结果 观察组术后乳房美观优良率为96.67%,高于对照组的73.33%（P＜0.05）;两组治疗1年后均无复发和远处转移,生存率均为100.00%;两组治疗2年后生存率、复发率及远处转移率比较,差异无统计学意义（P ＞0.05）。结论 乳腺肿瘤整形保乳术在早期乳腺癌患者中的应用效果确切,可提升患者的术后乳房美观度,且预后状况较好,不会增加复发率及远处转移率。     

早期乳腺癌保乳手术术中放疗59例

目的 研究早期乳腺癌保乳手术术中放疗的可行性,评价术后并发症、乳房美容效果及肿瘤复发事件.方法 2007年6月至2010年12月,115例患者做保乳手术,59例(研究组)做术中放疗,同期有56例(对照组)术后做全乳放疗,在术后1个月评估切口愈合状况及并发症;术后1年比较两组乳房美容效果;术后随访肿瘤复发及死亡事件.结果 研究组切口愈合天数为13 ～22d,对照组为9 ～14d.研究组2例出现切口脂肪液化,16例有切口水肿,对照组未见切口脂肪液化、水肿;两组均未出现术后切口感染或血肿.术后1年乳房美容评价:研究组41例中优秀或好的有36例、一般或差的5例;对照组37例中优秀或好的有25例、一般或差的有12例(P=0.031).随访3～42个月(中位24个月),研究组局部复发2例(3.39％),其中1例(1.7％)死亡;对照组局部复发1例(1.8％),无死亡.结论 早期乳腺癌保乳手术术中放疗安全可靠、美容效果好、局部控制满意.     

Over surgery in breast cancer

Breast surgery remains the original and most effective ‘targeted’ therapy: excision of early cancer is curative and for more advanced disease surgery improves local disease control. However in well intentioned pursuit of cure and local disease control, some cancers are over-treated resulting in major physical and emotional morbidity.Less breast surgery is safe, as evidenced by steady reductions in mortality and local recurrence; earlier diagnosis and widespread use of systemic therapies and radiotherapy have allowed more conservative surgery. As tumour biology dictates cancer outcomes not surgery extent, surgery can safely be ‘minimum required’ rather than ‘more is better’ with the focus on removal of disease rather than healthy tissue.Surgeons can reduce the burden of surgery further but it is important that less surgery is not over-compensated by more radical or unnecessary systemic therapies and/or radiotherapy with their own toxicities and morbidity. We all need to be alert to the potential drivers of over treatment and over surgery such as failure to work within a multidisciplinary team, failure to design a multimodality treatment plan at diagnosis or overuse of novel assessment technologies of uncertain clinical utility. Pursuit of wide margins and the removal of the contra-lateral healthy breast for marginal risk-reduction gains are also to be discouraged as is routine local/regional surgery in stage 4 disease.The surgeon has a pivotal role in minimizing breast surgery to what is required to achieve the best oncological, functional and aesthetic outcomes.     

Oncoplastic Techniques in the Conservative Surgical Treatment of Breast Cancer: An Overview

Abstract:   Conservative surgery has become a well-established alternative to mastectomy in the treatment of breast cancer. However, in case of larger lesions or small-size breasts, the removal of adequate volumes of breast tissue to achieve tumor-free margins and reduce the risk of local relapse may compromise the cosmetic outcome, causing unpleasant results. In order to address this issue, new surgical techniques, so-called oncoplastic techniques, have been introduced in recent years to optimize the efficacy of conservative surgery both in terms of local control and cosmetic results. This article discusses the indications, advantages, and limitations of these techniques and their results in terms of local recurrence and overall survival.