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Fluorescence guided surgery

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https://www.readbyqxmd.com/read/28437441/fluorescence-imaging-topography-scanning-system-for-intraoperative-multimodal-imaging
#1
Tri T Quang, Hye-Yeong Kim, Forrest Sheng Bao, Francis A Papay, W Barry Edwards, Yang Liu
Fluorescence imaging is a powerful technique with diverse applications in intraoperative settings. Visualization of three dimensional (3D) structures and depth assessment of lesions, however, are oftentimes limited in planar fluorescence imaging systems. In this study, a novel Fluorescence Imaging Topography Scanning (FITS) system has been developed, which offers color reflectance imaging, fluorescence imaging and surface topography scanning capabilities. The system is compact and portable, and thus suitable for deployment in the operating room without disturbing the surgical flow...
2017: PloS One
https://www.readbyqxmd.com/read/28428283/regulatory-aspects-of-optical-methods-and-exogenous-targets-for-cancer-detection
#2
Willemieke S Tummers, Jason M Warram, Kiranya E Tipirneni, John Fengler, Paula Jacobs, Lalitha Shankar, Lori Henderson, Betsy Ballard, Brian W Pogue, Jamey P Weichert, Michael Bouvet, Jonathan Sorger, Christopher H Contag, John V Frangioni, Michael F Tweedle, James P Basilion, Sanjiv S Gambhir, Eben L Rosenthal
Considerable advances in cancer-specific optical imaging have improved the precision of tumor resection. In comparison to traditional imaging modalities, this technology is unique in its ability to provide real-time feedback to the operating surgeon. Given the significant clinical implications of optical imaging, there is an urgent need to standardize surgical navigation tools and contrast agents to facilitate swift regulatory approval. Because fluorescence-enhanced surgery requires a combination of both device and drug, each may be developed in conjunction, or separately, which are important considerations in the approval process...
April 20, 2017: Cancer Research
https://www.readbyqxmd.com/read/28415938/indocyanine-green-detects-sentinel-lymph-nodes-in-early-breast-cancer
#3
Jun Liu, Linping Huang, Ning Wang, Ping Chen
Objective To explore the clinical value of indocyanine green (ICG) for the fluorescence-guided detection of sentinel lymph nodes (SLNs) during sentinel lymph node biopsy (SLNB) in patients with early breast cancer. Methods This retrospective study included female patients with breast cancer. Patients were administered methylene blue and ICG using standard techniques. All SLNs that were collected during surgery were submitted for pathological examination. SLNs were defined as those that were either fluorescent, blue, fluorescent and blue or palpably suspicious...
April 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28411379/ancillary-testing-strategies-in-salivary-gland-aspiration-cytology-a-practical-pattern-based-approach
#4
REVIEW
Christopher C Griffith, Momin T Siddiqui, Alessandra C Schmitt
Fine needle aspiration of salivary gland tumors is a common preoperative triage as it is useful in determining which patients should undergo surgical resection and in guiding the extent of surgery in those cases deemed appropriate for resection. While a specific diagnosis can be achieved on a cytologic specimen in many cases, there is also a considerable amount of morphologic diversity that prevents such confident preoperative classification and in these cases it can be a challenge to confidently determine if a tumor is benign or malignant...
April 14, 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/28404198/molecular-fluorescence-guided-surgery-of-peritoneal-carcinomatosis-of-colorectal-origin-a-single-centre-feasibility-study
#5
Niels J Harlaar, Marjory Koller, Steven J de Jongh, Barbara L van Leeuwen, Patrick H Hemmer, Schelto Kruijff, Robert J van Ginkel, Lukas B Been, Johannes S de Jong, Gursah Kats-Ugurlu, Matthijs D Linssen, Annelies Jorritsma-Smit, Marleen van Oosten, Wouter B Nagengast, Vasilis Ntziachristos, Gooitzen M van Dam
BACKGROUND: Optimum cytoreductive surgery combined with hyperthermic intraperitoneal chemotherapy (HIPEC) is essential for the curative treatment of peritoneal carcinomatosis of colorectal origin. At present, surgeons depend on visual inspection and palpation for tumour detection. Improved detection of tumour tissue using molecular fluorescence-guided surgery could not only help attain a complete cytoreduction of metastatic lesions, but might also prevent overtreatment by avoiding resection of benign lesions...
December 2016: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28400397/fluorescence-in-a-cryptococcoma-following-administration-of-5-aminolevulinic-acid-hydrochloride-gliolan
#6
Waldo Gerard Solis, Mitchell Hansen
A 54-year-old man presented with two episodes of dysarthria and left facial droop. Both episodes resolved by the time of examination. MRI of the brain revealed a right frontotemporal, heterogeneously enhancing mass with surrounding vasogenic oedema, suggestive of a high-grade primary brain neoplasm. The patient was administered preoperative 5-aminolevulinic acid hydrochloride (Gliolan), and fluorescence-guided resection of the lesion was undertaken. Cryptococcus gattii infection was diagnosed from the specimen and the patient was given appropriate antifungal treatment...
April 11, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28387632/near-infrared-fluorescent-image-guided-surgery-for-intracranial-meningioma
#7
John Y K Lee, John T Pierce, Jayesh P Thawani, Ryan Zeh, Shuming Nie, Maria Martinez-Lage, Sunil Singhal
OBJECTIVE Meningiomas are the most common primary tumor of the central nervous system. Complete resection can be curative, but intraoperative identification of dural tails and tumor remnants poses a clinical challenge. Given data from preclinical studies and previous clinical trials, the authors propose a novel method of localizing tumor tissue and identifying residual disease at the margins via preoperative systemic injection of a near-infrared (NIR) fluorescent contrast dye. This technique, what the authors call "second-window indocyanine green" (ICG), relies on the visualization of ICG approximately 24 hours after intravenous injection...
April 7, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28368056/ph-responsive-fluorescent-graphene-quantum-dots-for-fluorescence-guided-cancer-surgery-and-diagnosis
#8
Zetan Fan, Shixin Zhou, Cesar Garcia, Louzhen Fan, Jiangbing Zhou
Cancer remains a major cause of morbidity and mortality around the world. Improved cancer treatment requires enhancement of cancer diagnosis and detection. To achieve this goal, here we report a novel imaging probe, pH-responsive fluorescent graphene quantum dots (pRF-GQDs). pRF-GQDs were prepared by electrolysis of graphite rods in sodium p-toluenesulfonate acetonitrile solution. The resulting pRF-GQDs, which have minimal toxicity, display a sharp fluorescence transition between green and blue at pH 6.8, a pH matching the acidic extracellular microenvironment in solid tumors...
April 13, 2017: Nanoscale
https://www.readbyqxmd.com/read/28362393/two-techniques-to-create-hypoparathyroid-mice-parathyroidectomy-using-gfp-glands-and-diphtheria-toxin-mediated-parathyroid-ablation
#9
Ruiye Bi, Yi Fan, En Luo, Quan Yuan, Michael Mannstadt
Hypoparathyroidism (HP) is a disorder characterized by low levels of PTH which lead to hypocalcemia, hyperphosphatemia, and low bone turnover. The most common cause of the disease is accidental removal of the parathyroid glands during thyroid surgery. Novel therapies for HP are needed, but testing them requires reliable animal models of acquired HP. Here, we demonstrate the generation of two mouse models of acquired HP. In the GFP-PTX model, mice with green fluorescent protein (GFP) expressed specifically in the parathyroids (PTHcre-mTmG) were created by crossing PTHcre(+) mice with Rosa-mTmG(fl/fl) mice...
March 14, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28345887/from-detection-to-resection-photoacoustic-tomography-and-surgery-guidance-with-indocyanine-green-loaded-gold-nanorod-liposome-core-shell-nanoparticles-in-liver-cancer
#10
Tianpei Guan, Wenting Shang, Hui Li, Xin Yang, Chihua Fang, Jie Tian, Kun Wang
Conventional imaging methods encounter challenges in diagnosing liver cancer that is less than 10 mm or without typical hypervascular features. With deep penetration and high spatial resolution imaging capability, the emerging photoacoustic tomography may offer better diagnostic efficacy for noninvasive liver cancer detection. Moreover, near-infrared fluorescence imaging-guided hepatectomy was proven to be able to identify nodules at the millimeter level. Thus, suitable photoacoustic and fluorescence dual-modality imaging probe may benefit patients in early diagnosis and complete resection...
April 11, 2017: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/28339120/accessing-structurally-diverse-near-infrared-cyanine-dyes-for-folate-receptor-targeted-cancer-cell-staining
#11
Sandra G König, Roland Krämer
Folate receptor (FR) targeting is one of the most promising strategies for the development of small-molecule based cancer imaging agents since the FR is highly overexpressed on the surface of many cancer cell types. FR-targeted conjugates of NIR emissive cyanine dyes are in advanced clinical trials for fluorescence-guided surgery and are valuable research tools for optical molecular imaging in animal models. Only a small number of promising conjugates has been evaluated so far. Analysis of structure-performance relations to identify critical factors modulating the performance of targeted conjugates is essential for successful further optimization...
March 24, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28320558/can-intra-operative-fluorescence-play-a-significant-role-in-hepatobiliary-surgery
#12
REVIEW
A D Jones, J C Wilton
Liver resection remains the cornerstone of curative treatment for hepatocellular carcinoma and colorectal cancer liver metastases. Its success is dependent upon the extent of resection achieved. To this end, intra-operative imaging techniques have been experimented with to aid the surgeon. Fluorescence guided surgery (FGS) utilises the properties of near infrared light emitting molecules to identify malignant tissue, enabling the surgeon to maximise resection of diseased tissue and minimise collateral damage...
March 6, 2017: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28317584/dealing-with-microscopic-peritoneal-metastases-of-epithelial-ovarian-cancer-a-surgical-challenge
#13
REVIEW
Henri Azaïs, Juan Pablo Estevez, Périne Foucher, Yohan Kerbage, Serge Mordon, Pierre Collinet
Understanding biology and progression mechanisms of peritoneal metastases of epithelial ovarian cancer (EOC) is a cornerstone in the knowledge and the comprehensive management of the disease. Despite clinical remission after the association of complete cytoreductive surgery and platinum-based chemotherapy, peritoneal recurrence still occurs in 60% of patients. Eligible studies, published from 1980 to June 2016, were retrieved through ClinicalTrials.gov, MEDLINE, Cochrane databases and bibliography searches...
March 2017: Surgical Oncology
https://www.readbyqxmd.com/read/28284863/next-generation-nir-fluorophores-for-tumor-imaging-and-fluorescence-guided-surgery-a-review
#14
REVIEW
Ashanul Haque, Md Serajul Haque Faizi, Jahangir Ahmad Rather, Muhammad S Khan
Cancer is a group of diseases responsible for the major causes of mortality and morbidity among people of all ages. Even though medical sciences have made enormous growth, complete treatment of this deadly disease is still a challenging task. Last few decades witnessed an impressive growth in the design and development of near infrared (NIR) fluorophores with and without recognition moieties for molecular recognitions, imaging and image guided surgeries. The present article reviews recently reported NIR emitting organic/inorganic fluorophores that targets and accumulates in organelle/organs specifically for molecular imaging of cancerous cells...
February 28, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28277591/the-role-of-fluorescent-angiography-in-anastomotic-leaks
#15
Sarath Sujatha-Bhaskar, Mehraneh D Jafari, Michael J Stamos
Anastomotic leaks following colorectal anastomosis has substantial implications including increased morbidity, longer hospitalization, and reduced overall survival. The etiology of leaks includes patient factors, technical factors, and anastomotic perfusion. An intact anastomotic blood supply is especially crucial in the physiology of anastomotic healing. To date, no established intraoperative methods have been developed that reliably and reproducibly identify and prevent leak occurrence. Recently, fluorescent angiography (FA) with indocyanine green (ICG) has emerged as an innovative modality for intraoperative perfusion assessment...
March 9, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/28269438/a-novel-wireless-wearable-fluorescence-image-guided-surgery-system
#16
Kunshan He, Yamin Mao, Jinzuo Ye, Yu An, Shixin Jiang, Chongwei Chi, Jie Tian
Segmentectomy using indocyanine green (ICG) has become a primary treatment option to achieve a complete resection and preserve lung function in early-stage lung cancer. However, owing to a lack of appropriate intraoperative imaging systems, it is a huge challenge for surgeons to identify the intersegmental plane during the operation, leading to poor prognosis. Thus, we developed a novel wireless wearable fluorescence image-guided surgery system (LIGHTEN) for fast and accurate identification of intersegmental planes in human patients...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28255352/direct-administration-of-nerve-specific-contrast-to-improve-nerve-sparing-radical-prostatectomy
#17
Connor W Barth, Summer L Gibbs
Nerve damage remains a major morbidity following nerve sparing radical prostatectomy, significantly affecting quality of life post-surgery. Nerve-specific fluorescence guided surgery offers a potential solution by enhancing nerve visualization intraoperatively. However, the prostate is highly innervated and only the cavernous nerve structures require preservation to maintain continence and potency. Systemic administration of a nerve-specific fluorophore would lower nerve signal to background ratio (SBR) in vital nerve structures, making them difficult to distinguish from all nervous tissue in the pelvic region...
2017: Theranostics
https://www.readbyqxmd.com/read/28245129/effect-of-dye-and-conjugation-chemistry-on-the-biodistribution-profile-of-near-infrared-labeled-nanobodies-as-tracers-for-image-guided-surgery
#18
Pieterjan Debie, Jannah Van Quathem, Inge Hansen, Gezim Bala, Sam Massa, Nick Devoogdt, Catarina Xavier, Sophie Hernot
Advances in optical imaging technologies have stimulated the development of near-infrared (NIR) fluorescently labeled targeted probes for use in image-guided surgery. As nanobodies have already proven to be excellent candidates for molecular imaging, we aimed in this project to design NIR-conjugated nanobodies targeting the tumor biomarker HER2 for future applications in this field and to evaluate the effect of dye and dye conjugation chemistry on their pharmacokinetics during development. IRDye800CW or IRdye680RD were conjugated either randomly (via lysines) or site-specifically (via C-terminal cysteine) to the anti-HER2 nanobody 2Rs15d...
April 3, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28242559/fluorescence-guided-surgery-of-brain-abscesses
#19
Julius Höhne, Alexander Brawanski, Karl-Michael Schebesch
OBJECTIVES: Fluorescein Sodium (FL) enhances areas in the brain with a disrupted blood brain barrier (BBB). Solitary brain abscesses (BA) are characterized by the pathognomonic finding of BBB disruption. Consequently, FL may have the potential to improve the intra-operative visualization of BA. Here, we report a series of patients with BA that where treated surgically after application of FL in combination with a dedicated light filter integrated in the surgical microscope. METHODS: 7 patients (4 female, 3 male; mean age 53...
April 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28227684/a-novel-wireless-wearable-fluorescence-image-guided-surgery-system
#20
Kunshan He, Yamin Mao, Jinzuo Ye, Yu An, Shixin Jiang, Chongwei Chi, Jie Tian, Kunshan He, Yamin Mao, Jinzuo Ye, Yu An, Shixin Jiang, Chongwei Chi, Jie Tian, Shixin Jiang, Jinzuo Ye, Kunshan He, Chongwei Chi, Jie Tian, Yamin Mao, Yu An
Segmentectomy using indocyanine green (ICG) has become a primary treatment option to achieve a complete resection and preserve lung function in early-stage lung cancer. However, owing to a lack of appropriate intraoperative imaging systems, it is a huge challenge for surgeons to identify the intersegmental plane during the operation, leading to poor prognosis. Thus, we developed a novel wireless wearable fluorescence image-guided surgery system (LIGHTEN) for fast and accurate identification of intersegmental planes in human patients...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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