Search results for "Color"
showing 10 items of 2721 documents
Tree Species Identification Using 3D Spectral Data and 3D Convolutional Neural Network
2018
In this study we apply 3D convolutional neural network (CNN) for tree species identification. Study includes the three most common Finnish tree species. Study uses a relatively large high-resolution spectral data set, which contains also a digital surface model for the trees. Data has been gathered using an unmanned aerial vehicle, a framing hyperspectral imager and a regular RGB camera. Achieved classification results are promising by with overall accuracy of 96.2 % for the classification of the validation data set. nonPeerReviewed
Sentinel Lymph Node Analysis in Colorectal Cancer Patients Using One-Step Nucleic Acid Amplification in Combination With Fluorescence and Indocyanine…
2018
Purpose: Analysis of the sentinel lymph node (SLN) in colorectal cancer (CRC) patients was proposed for more accurate staging and tailored lymphadenectomy. The aim of this study was to assess the ability to predict lymph node (LN) involvement through analysis of the SLN with a one-step nucleic acid (OSNA) technique in combination with peritumoral injection of indocyanine green (ICG) and near-infrared (NIR) lymphangiography in CRC patients. Methods: A total of 34 patients were enrolled. Overall, 51 LNs were analyzed with OSNA. LNs of 17 patients (50%) were examined simultaneously with hematoxylin and eosin (H&E) and OSNA. Results: SLN analysis of 17 patients examined with H&E and OSN…
Indocyanine Green-Enhanced Colorectal Surgery—between Being Superfluous and Being a Game-Changer
2020
Nowadays, surgical innovations incorporate new technological conquests and must be validated by evidence-based medicine. The use of augmented reality-assisted indocyanine green (ICG) fluorescence has generated a myriad of intraoperative applications such as demonstration of key anatomical landmarks, sentinel lymph nodes, and real-time assessment of local blood flow. This paper presents a systematic review of the clinical evidence regarding the applications of ICG near-infrared (NIR) fluorescence in colorectal surgery. After we removed duplicate publications and screened for eligibility, a total of 36 articles were evaluated: 23 on perfusion assessment, 10 on lymph node mapping, and 3 on int…
RGB mapping of hemoglobin distribution in skin
2011
An experimental RGB imaging system based on commercial color camera was constructed, and its potential for mapping of hemoglobin distribution in skin was studied. Two types of LEDs (RGB and white “warm” LEDs) were compared as illuminators for acquiring images of vascular and pigmented skin malformations. A novel approach for studies of skin capillary refill by RGB analysis has been proposed and discussed.
Surveillance colonoscopy in ulcerative colitis: magnifying chromoendoscopy in the spotlight
2004
Chromoendoscopy in ulcerative colitis may offer the possibility of detecting dysplastic or neoplastic changes at a curable stage, and thus expand the indication for chromoendoscopy from screening to surveillance colonoscopy Colonoscopy is the gold standard for colorectal cancer screening.1–3 Detection and complete removal of adenomas disrupt the adenoma-carcinoma sequence and thus prevent the development of colorectal cancer. However, endoscopists still fear that they may have overlooked relevant lesions despite the availability of modern videoendoscopes. This problem is underlined by a relatively high rate of adenomas missed by conventional endoscopy (up to 27%), as determined by back to b…
Bericht zum 1. Workshop zur lokalen Exzision von Rektumkarzinomen
2007
To determine the significance of local excision (LE) of rectal cancer and discuss oncologic results, a 1st Workshop on LE of rectal cancer was held at the Department of General und Abdominal Surgery, Johannes Gutenberg-University Mainz, Germany. The option of broadening the indication for local excision after neoadjuvant radiochemotherapy (nRCT) of rectal cancer was to be assessed. Local excision of "low risk" T 1 carcinomas was rated as oncologically adequate therapy with good functional results and low complication rates. Transanal endoscopic microsurgical (TEM) resection was the preferrred technique. Pre-requisite for the achievement of low recurrence rates (5 %) is an R0 resection with …
Resección extendida y exenteración pélvica en el cáncer de recto del tercio inferior
2014
Approximately 10% of all low rectal cancer needs surgical resection extended to other pelvic structures. Indication for extended resection should be given according to a precise systemic and local preoperative staging. Magnetic Resonance Imaging is the most important instrument utilized by the Multidisciplinary Team to decide therapeutic strategy according to the surgical risk. The status of the pathological circumferential resection margin is the most important prognostic factor determining local recurrence risk and oncological outcome and for this reason it should be considered pivotal in the decision of the strategy of treatment. When extended resection is performed, the presence of an e…
Stellenwert der Rektoskopie und Koloskopie f�r den Internisten
2003
The endoscopic examination of the large intestine can be considered today a routine examination in internal medicine. Since the introduction of flexible videoendoscopy, evaluating diseases in the distal colon using rectoscopy has become less important. Anoproctoscopy is an obligatory component for a complete colon diagnostic after a flexible ileo-colonoscopy has been performed. Colonoscopy has improved significantly the diagnosis and therapy of diseases in the large intestine since it has been introduced more than 30 years ago. By introducing modern videocolonoscopy in addition to other instruments, there is today a broad spectrum of diagnostic and therapeutic indications available. Specifi…
Colonoscopy, Tumors, and Inflammatory Bowel Disease - New Diagnostic Methods
2006
Accurate detection of premalignant lesions and early cancers in the colon is essential for curative endoscopic or surgical therapy, since the prognosis for the affected patients is closely related to the size and stage of the neoplastic lesion. Total colonoscopy is the accepted gold standard for screening and surveillance of colorectal cancer. This review summarizes recently published diagnostic developments and key findings in the areas of colonoscopy, colonic tumors, and inflammatory bowel diseases. Relevant findings have been reported for chromo-endoscopy in the diagnosis of colitis-associated neoplasia, as well as flat and depressed adenomas. Real-time Doppler capabilities have now been…
Endoscopic Management for Patients with Serrated Polyposis Syndrome is Feasible and Effective:
2014
Background and Study Aims: Serrated polyposis syndrome is a rare condition in which multiple serrated lesions develop all over the colon, which is thought to be associated with an increased risk for the development of cancer. The aim of this study was to investigate the feasibility of endoscopic treatment and standardised surveillance in patients with this increasingly recognised syndrome. Methods: From September 2010 to November 2013, consecutive patients were included in a prospective study. All patients underwent chromoendoscopy at first presentation and during surveillance. Follow-up examinations were carried out at 3 month intervals until complete clearance was achieved. Afterwards, pa…