Background: Respiratory motion causes thoracic movement and reduces targeting accuracy in radiotherapy. Objective: This study proposes an approach to generate a model to track lung tumor motion by controlling dynamic multi-leaf collimators. Material and Methods: All slices which contained tumor were contoured in the 4D-CT images for...

BACKGROUND The issue of how differences in timbre are represented in the neural response still has not been well addressed, particularly with regard to the relevant brain mechanisms. Here we employ phasing and clipping of tones to produce auditory stimuli differing to describe the multidimensional nature of timbre. We investigated the auditory response and sensory gating as well, using by magne...

Gated multi-detector CT (MDCT) is now recognised as an excellent and robust application for non-invasive assessment of coronary arteries, and in many centres is routinely used. Some studies have shown that MDCT scanners with 64-detector row have a 99% negative predictive value for the detection of coronary artery stenosis. MDCT images obtained with ECG gating are superior to the standard (non-E...

Breathing motion leads to a significant displacement and deformation of organs in the abdominal region. This makes the detection of the breathing phase for numerous applications necessary. We propose a new, purely image-based respiratory gating method for ultrasound. Further, we use this technique to provide a solution for breathing affected 4D ultrasound acquisitions with a wobbler probe. We a...

The voltage-dependent anion channel (VDAC) is the major pathway for ATP, ADP, and other respiratory substrates through the mitochondrial outer membrane, constituting a crucial point of mitochondrial metabolism regulation. VDAC is characterized by its ability to "gate" between an open and several "closed" states under applied voltage. In the early stages of tumorigenesis or during ischemia, part...

Respiratory motion leads to blur and artifacts in single-photon emission computed tomography (SPECT) images. This may be an issue some treatments such as liver radioembolization. The purpose of this work was reconstruct 4-D respiration-gated SPECT images using a data-driven approach. A respiratory signal extracted from list-mode data Laplacian eigenmaps used for retrospective phase gating. meth...

OBJECTIVE Cardiac and respiratory motion artifacts degrade the image quality of lung CT in free-breathing children. The aim of this study was to evaluate the effect of combined electrocardiography (ECG) and respiratory triggering on respiratory misregistration artifacts on lung CT in free-breathing children. MATERIALS AND METHODS In total, 15 children (median age 19 months, range 6 months-8 y...

Background K(2P) channels are tightly regulated by different stimuli including variations of external and internal pH. pH sensitivity relies on proton-sensing residues that influence channel gating and activity. Gene inactivation in the mouse is a revealing implication of K(2P) channels in many physiological functions ranging from hormone secretion to central respiratory adaptation. Surprisingl...

With the use of current multislice techniques for MR cholangiopancreatography various upper abdominal pathologies including pancreatic carcinoma, Klatskin tumor and metastatic spread can be non invasively depicted. Respiratory gating allows free breathing of the patient, which increases patient comfort, while excellent image quality can be achieved. In this concise pictorial report, state of th...