Search results for "image"

Biological target volume segmentation for radiotherapy treatment planning

2016

Läßt sich das sonomorphologische Lymphknotenstaging bei Kopf-Hals-Karzinomen automatisieren?

2000

OBJECTIVES B-scan ultrasound imaging is an obligatory examination of great clinical relevance in patients with head and neck cancer. The procedure, however, is dependent on an experienced examiner and thus requires higher personal resources than other examination techniques. In addition, its subjective character leads to possible deficits in reliability and objectivity. Established sonomorphologic criteria (echo-contour, echo-density, echo-structure, boundary) should therefore be matched to the findings of computer aided sonomorphometry. METHOD 200 sonographic images of the cervical region of patients with oral carcinoma were analysed semi- and fully automatically as well as interactively b…

Smartphone single-snapshot mapping of skin chromophores

2016

Suitability of smartphone for single-snapshot mapping of skin melanin, oxy-hemoglobin and deoxy-hemoglobin under 3-wavelengths illumination was demonstrated. Simultaneous 448-532-659 nm illumination was provided by a portable laser-based prototype.

American College of Cardiology/ European Society of Cardiology international study of angiographic data compression phase III. Measurement of image q…

2000

Objectives We sought to investigate up to which level of Joint Photographic Experts Group (JPEG) data compression the perceived image quality and the detection of diagnostic features remain equivalent to the quality and detectability found in uncompressed coronary angiograms. Background Digital coronary angiograms represent an enormous amount of data and therefore require costly computerized communication and archiving systems. Earlier studies on the viability of medical image compression were not fully conclusive. Methods Twenty-one raters evaluated sets of 91 cine runs. Uncompressed and compressed versions of the images were presented side by side on one monitor, and image quality differe…

Letter: Image-Guided Navigation and Robotics in Spine Surgery.

2020

Prostate Cancer Segmentation from Multiparametric MRI Based on Fuzzy Bayesian Model

2014

International audience

Mechanical thrombectomy for rescue treatment of severe thrombosis of the superior sagittal sinus with the use of Penumbra and AngioJet catheters

2018

Tissue classification by texture and spectral analysis of intracoronary ultrasound radio-frequency data

2002

Imaging of vascular structures by intracoronary ultrasound allows in principal the recognition of different lesion types due to the echomorphology in the B-mode image. The subjective visual diagnosis is often difficult, especially the differentiation between thrombi and non-calcified plaque. The aim of this study was the extraction of features from the ultrasound radio-frequency signal for an objective characterization of coronary tissue. Methods of texture analysis and frequency analysis were used to differentiate red and white thrombi in vitro. Eight texture parameters of first and second order significantly differentiated red and white thrombi. The backscatter transfer function of red th…

Photoaging evaluation by RGB images using a smartphone for photodynamic therapy assessment

2017

In this study was evaluated the photoaging of patients' skins by the processing of RGB images acquired with an optical system based on a smartphone. Two groups were approached: a younger and an older.

Balloon aortic valvuloplasty, Impella insertion and complex coronary intervention: is this all feasible fully percutaneously via upper limb access?

2021

Complex high-risk indicated patients (CHIP) with a limited vascular access constitute a real challenge for percutaneous coronary interventions (PCI), particularly if they require mechanical circulatory support devices. A 73-year-old man with recent non-ST segment elevation myocardial infraction, depressed left ventricular function (ejection fraction, 40%), aortic stenosis (max/mean gradient, 50/32 mm Hg; aortic valve area and its index, 1.0 cm2 and 0.5 cm2/m2) and numerous comorbidities (including recently diagnosed lung cancer in the initial phase) was scheduled by the heart team for balloon aortic valvuloplasty (BAV) and Impella-supported complex PCI of the left main (LM) and the left ant…