Comput. Biol. Med. - Changes in aerodynamics during vocal cord dysfunction.

Tópicos

{ imag(2675) segment(2577) method(1081) }
{ method(984) reconstruct(947) comput(926) }
{ chang(1828) time(1643) increas(1301) }
{ blood(1257) pressur(1144) flow(957) }
{ state(1844) use(1261) util(961) }
{ data(1737) use(1416) pattern(1282) }
{ howev(809) still(633) remain(590) }
{ cost(1906) reduc(1198) effect(832) }
{ high(1669) rate(1365) level(1280) }
{ measur(2081) correl(1212) valu(896) }
{ patient(2315) diseas(1263) diabet(1191) }
{ surgeri(1148) surgic(1085) robot(1054) }
{ problem(2511) optim(1539) algorithm(950) }
{ algorithm(1844) comput(1787) effici(935) }
{ model(3480) simul(1196) paramet(876) }
{ process(1125) use(805) approach(778) }
{ system(1976) rule(880) can(841) }
{ take(945) account(800) differ(722) }
{ treatment(1704) effect(941) patient(846) }
{ error(1145) method(1030) estim(1020) }
{ control(1307) perform(991) simul(935) }
{ model(2220) cell(1177) simul(1124) }
{ studi(1410) differ(1259) use(1210) }
{ perform(999) metric(946) measur(919) }
{ perform(1367) use(1326) method(1137) }
{ monitor(1329) mobil(1314) devic(1160) }
{ group(2977) signific(1463) compar(1072) }
{ activ(1138) subject(705) human(624) }
{ can(981) present(881) function(850) }
{ use(1733) differ(960) four(931) }
{ implement(1333) system(1263) develop(1122) }
{ survey(1388) particip(1329) question(1065) }
{ decis(3086) make(1611) patient(1517) }
{ model(3404) distribut(989) bayesian(671) }
{ can(774) often(719) complex(702) }
{ imag(1947) propos(1133) code(1026) }
{ inform(2794) health(2639) internet(1427) }
{ imag(1057) registr(996) error(939) }
{ bind(1733) structur(1185) ligand(1036) }
{ sequenc(1873) structur(1644) protein(1328) }
{ method(1219) similar(1157) match(930) }
{ featur(3375) classif(2383) classifi(1994) }
{ imag(2830) propos(1344) filter(1198) }
{ network(2748) neural(1063) input(814) }
{ studi(2440) review(1878) systemat(933) }
{ motion(1329) object(1292) video(1091) }
{ assess(1506) score(1403) qualiti(1306) }
{ framework(1458) process(801) describ(734) }
{ learn(2355) train(1041) set(1003) }
{ concept(1167) ontolog(924) domain(897) }
{ clinic(1479) use(1117) guidelin(835) }
{ extract(1171) text(1153) clinic(932) }
{ method(1557) propos(1049) approach(1037) }
{ data(1714) softwar(1251) tool(1186) }
{ design(1359) user(1324) use(1319) }
{ care(1570) inform(1187) nurs(1089) }
{ general(901) number(790) one(736) }
{ search(2224) databas(1162) retriev(909) }
{ featur(1941) imag(1645) propos(1176) }
{ case(1353) use(1143) diagnosi(1136) }
{ data(3963) clinic(1234) research(1004) }
{ risk(3053) factor(974) diseas(938) }
{ research(1085) discuss(1038) issu(1018) }
{ system(1050) medic(1026) inform(1018) }
{ import(1318) role(1303) understand(862) }
{ model(2341) predict(2261) use(1141) }
{ visual(1396) interact(850) tool(830) }
{ compound(1573) activ(1297) structur(1058) }
{ studi(1119) effect(1106) posit(819) }
{ spatial(1525) area(1432) region(1030) }
{ record(1888) medic(1808) patient(1693) }
{ health(3367) inform(1360) care(1135) }
{ ehr(2073) health(1662) electron(1139) }
{ research(1218) medic(880) student(794) }
{ patient(2837) hospit(1953) medic(668) }
{ model(2656) set(1616) predict(1553) }
{ data(2317) use(1299) case(1017) }
{ age(1611) year(1155) adult(843) }
{ medic(1828) order(1363) alert(1069) }
{ signal(2180) analysi(812) frequenc(800) }
{ sampl(1606) size(1419) use(1276) }
{ gene(2352) biolog(1181) express(1162) }
{ data(3008) multipl(1320) sourc(1022) }
{ first(2504) two(1366) second(1323) }
{ intervent(3218) particip(2042) group(1664) }
{ time(1939) patient(1703) rate(768) }
{ patient(1821) servic(1111) care(1106) }
{ use(2086) technolog(871) perceiv(783) }
{ analysi(2126) use(1163) compon(1037) }
{ health(1844) social(1437) communiti(874) }
{ structur(1116) can(940) graph(676) }
{ cancer(2502) breast(956) screen(824) }
{ use(976) code(926) identifi(902) }
{ drug(1928) target(777) effect(648) }
{ result(1111) use(1088) new(759) }
{ estim(2440) model(1874) function(577) }
{ activ(1452) weight(1219) physic(1104) }
{ method(1969) cluster(1462) data(1082) }
{ method(2212) result(1239) propos(1039) }
{ detect(2391) sensit(1101) algorithm(908) }

Resumo

CKGROUND: Changes in laryngeal airflow dynamics during episodes of vocal cord dysfunction (VCD) have not been well described. Very little is known about how inspiratory airflow is impacted when the vocal cords transition from normal inhalation state to a paradoxical adducted state; and how much change in laryngeal airflow and resistance occur before symptoms of stridor and air hunger emerge. This study provides new insight on the effects of VCD on respiratory airflow using computational fluid dynamics (CFD) techniques.METHODS: Computed tomography images of a subject with normal vocal cords opening at the time of scanning were digitally modified to mimic an episode of VCD. To quantify and compare changes in inspiratory flow during VCD attack and normal inhalation, steady-state, laminar simulations were performed for three different breathing rates.RESULTS: Pressure-flow analysis during VCD revealed that increasing inspiratory effort is not as efficient as in normal inhalation. Airflow resistance at the epiglottis was higher in the normal state (0.04Pa.s/mL versus 0.02Pa.s/mL) than in VCD; while resistance at the glottis and trachea remained roughly the same (0.04Pa.s/mL) during normal inhalation, it escalated during VCD (0.11Pa.s/mL and 0.13Pa.s/mL at the glottis and trachea, respectively). Peak airflow velocity and vorticity occurred around the glottis during VCD, and at the epiglottis during normal inhalation.CONCLUSIONS: This pilot study demonstrates that attempting to force more inspired air will yield greater glottal resistance during VCD. Furthermore, there were evidence of abrupt laryngeal pressure gradient, chaotic airflow and high concentration of shear stresses in the glottal region.

Resumo Limpo

ckground chang laryng airflow dynam episod vocal cord dysfunct vcd well describ littl known inspiratori airflow impact vocal cord transit normal inhal state paradox adduct state much chang laryng airflow resist occur symptom stridor air hunger emerg studi provid new insight effect vcd respiratori airflow use comput fluid dynam cfd techniquesmethod comput tomographi imag subject normal vocal cord open time scan digit modifi mimic episod vcd quantifi compar chang inspiratori flow vcd attack normal inhal steadyst laminar simul perform three differ breath ratesresult pressureflow analysi vcd reveal increas inspiratori effort effici normal inhal airflow resist epiglotti higher normal state pasml versus pasml vcd resist glotti trachea remain rough pasml normal inhal escal vcd pasml pasml glotti trachea respect peak airflow veloc vortic occur around glotti vcd epiglotti normal inhalationconclus pilot studi demonstr attempt forc inspir air will yield greater glottal resist vcd furthermor evid abrupt laryng pressur gradient chaotic airflow high concentr shear stress glottal region

Resumos Similares

BMC Med Inform Decis Mak - Dynamical density delay maps: simple, new method for visualising the behaviour of complex systems. ( 0,691044850591387 )
IEEE J Biomed Health Inform - Segmentation of the blood vessels and optic disk in retinal images. ( 0,656567178871012 )
Comput Methods Programs Biomed - A fast seed detection using local geometrical feature for automatic tracking of coronary arteries in CTA. ( 0,654130622164381 )
Comput. Biol. Med. - A study of the sink effect by blood vessels in radiofrequency ablation. ( 0,651537022217474 )
Int J Comput Assist Radiol Surg - Mandible reconstruction with patient-specific pre-bent reconstruction plates: comparison of a transfer key method to the standard method--results of an in vitro study. ( 0,639969314509854 )
Med Biol Eng Comput - High-quality conforming hexahedral meshes of patient-specific abdominal aortic aneurysms including their intraluminal thrombi. ( 0,628167545673241 )
Int J Comput Assist Radiol Surg - Automated segmentation of blood-flow regions in large thoracic arteries using 3D-cine PC-MRI measurements. ( 0,623437072009946 )
Int J Comput Assist Radiol Surg - 3D ultrasound centerline tracking of abdominal vessels for?endovascular navigation. ( 0,621941448281434 )
IEEE Trans Image Process - Adjoint active surfaces for localization and imaging. ( 0,620155644379549 )
Int J Med Robot - Automatic scanning of large tissue areas in neurosurgery using optical coherence tomography. ( 0,616895386985196 )
Int J Comput Assist Radiol Surg - 3D lumbar spine intervertebral disc segmentation and compression simulation from MRI using shape-aware models. ( 0,611918834643086 )
Comput Math Methods Med - An object-oriented simulator for 3D digital breast tomosynthesis imaging system. ( 0,605852164941575 )
IEEE J Biomed Health Inform - Morphological analysis of the left ventricular endocardial surface using a bag-of-features descriptor. ( 0,605350070345774 )
Int J Neural Syst - Self-supervised MRI tissue segmentation by discriminative clustering. ( 0,604628735052469 )
Int J Comput Assist Radiol Surg - Intraoperative visualization of cerebral oxygenation using hyperspectral image data: a two-dimensional mapping method. ( 0,603645412218888 )
IEEE Trans Image Process - Spatio-temporal video segmentation with shape growth or shrinkage constraint. ( 0,602111339548359 )
IEEE Trans Image Process - Iterative narrowband-based graph cuts optimization for geodesic active contours with region forces (GACWRF). ( 0,60130435943167 )
Med Biol Eng Comput - Haemodynamic forces on in vitro thrombi: a numerical analysis. ( 0,599025059834368 )
Comput. Biol. Med. - Pseudo three-dimensional vision-based nail-fold morphological and hemodynamic analysis. ( 0,596400007952 )
Comput Methods Programs Biomed - An improved method of automatic colon segmentation for virtual colon unfolding. ( 0,593505126728042 )
IEEE Trans Image Process - A novel rotationally invariant region-based hidden Markov model for efficient 3-D image segmentation. ( 0,592702525121433 )
Int J Med Robot - In vitro three-dimensional aortic vasculature modeling based on sensor fusion between intravascular ultrasound and magnetic tracker. ( 0,592478821575015 )
Comput Math Methods Med - Automatic segmentation of anatomical structures from CT scans of thorax for RTP. ( 0,591853313149095 )
Int J Comput Assist Radiol Surg - Co-registration of intra-operative brain surface photographs and pre-operative MR images. ( 0,587551561295936 )
Comput Methods Programs Biomed - Virtual volume resection using multi-resolution triangular representation of B-spline surfaces. ( 0,586908212126329 )
J Med Syst - A medical software system for volumetric analysis of cerebral pathologies in magnetic resonance imaging (MRI) data. ( 0,58636812900487 )
Comput. Biol. Med. - Vibrational resonance in the FitzHugh-Nagumo system with time-varying delay feedback. ( 0,586160670070551 )
J Clin Monit Comput - USCOM-window to the circulation: utility of supra-sternal Doppler in an elderly anaesthetized patient for a robotic cystectomy. ( 0,584812050584703 )
Int J Comput Assist Radiol Surg - Comparison of 3D ultrasound and magnetic resonance imaging for microwave ablation in the canine splenomegaly model. ( 0,582311660572629 )
IEEE Trans Image Process - Atlas generation for subcortical and ventricular structures with its applications in shape analysis. ( 0,581684530604738 )
IEEE J Biomed Health Inform - A hybrid approach to segmentation of diseased lung lobes. ( 0,579109751697906 )
Int J Med Robot - Coracoclavicular ligaments anatomical reconstruction: a feasibility study. ( 0,577513986836243 )
Comput. Aided Surg. - Virtual reconstruction of pelvic tumor defects based on a gender-specific statistical shape model. ( 0,575761284806866 )
IEEE Trans Image Process - A level set method for image segmentation in the presence of intensity inhomogeneities with application to MRI. ( 0,573507331284708 )
Int J Comput Assist Radiol Surg - Fetal brain volumetry through MRI volumetric reconstruction and segmentation. ( 0,57237686821471 )
Int J Comput Assist Radiol Surg - Intramyocardial strain estimation from cardiac cine MRI. ( 0,571124356003785 )
Comput Methods Programs Biomed - Automatic selection of arterial input function on dynamic contrast-enhanced MR images. ( 0,570710911449874 )
Methods Inf Med - A statistical cerebroarterial atlas derived from 700 MRA datasets. ( 0,570631168314372 )
Med Biol Eng Comput - Airflow analysis in the alveolar region using the lattice-Boltzmann method. ( 0,568974077667061 )
Comput Methods Programs Biomed - Minimising retinal vessel artefacts in optical coherence tomography images. ( 0,568672054381143 )
Int J Comput Assist Radiol Surg - Automatic recognition of major fissures in human lungs. ( 0,568616496479751 )
Comput Methods Programs Biomed - Segmentation of ultrasound images of the carotid using RANSAC and cubic splines. ( 0,568307917992963 )
Comput Math Methods Med - Fitting C? continuous parametric surfaces to frontiers delimiting physiologic structures. ( 0,567383301350114 )
Comput Methods Programs Biomed - A novel method for pulmonary embolism detection in CTA images. ( 0,566433009891842 )
Comput Methods Programs Biomed - Image registration and atlas-based segmentation of cardiac outflow velocity profiles. ( 0,566432008253648 )
IEEE Trans Image Process - Incorporating anatomical side information into PET reconstruction using nonlocal regularization. ( 0,565784362746564 )
Comput Math Methods Med - Modeling and representation of human hearts for volumetric measurement. ( 0,565057841645437 )
Int J Comput Assist Radiol Surg - Fast and flexible distance measures for treatment planning. ( 0,564500994383746 )
Comput. Biol. Med. - Segmentation of interest region in medical volume images using geometric deformable model. ( 0,564475155292412 )
Comput. Biol. Med. - 3D geometric split-merge segmentation of brain MRI datasets. ( 0,56264300037429 )
Med Biol Eng Comput - Three-dimensional reconstruction of cranial defect using active contour model and image registration. ( 0,562502049068321 )
IEEE Trans Vis Comput Graph - Cone Tracing for Furry Object Rendering. ( 0,562231139951182 )
IEEE Trans Image Process - Automatic segmentation of the left atrium from MR images via variational region growing with a moments-based shape prior. ( 0,560948005019549 )
Int J Comput Assist Radiol Surg - Computer-assisted analysis of human upper arm flexion by 4D-visualization based on MRI. ( 0,560921866551506 )
AMIA Annu Symp Proc - Data analysis: evaluation of nanoscale contrast agent enhanced CT scan to differentiate between benign and malignant lung cancer in mouse model. ( 0,560673212024291 )
Comput Math Methods Med - Hybrid mesh for nasal airflow studies. ( 0,560217496243208 )
Int J Comput Assist Radiol Surg - Automatic patient-customised 3D reconstruction of human costal cartilage from lung MDCT dataset. ( 0,558831243582521 )
Comput Math Methods Med - A nonparametric shape prior constrained active contour model for segmentation of coronaries in CTA images. ( 0,557604295587323 )
Med Biol Eng Comput - Multiplane spectroscopic whole-body photoacoustic imaging of small animals in vivo. ( 0,557421823747285 )
Comput Methods Programs Biomed - A geometrical approach for evaluating left ventricular remodeling in myocardial infarct patients. ( 0,556093825066093 )
Int J Comput Assist Radiol Surg - Automatic generation of anatomic characteristics from cerebral aneurysm surface models. ( 0,5546115854306 )
Med Biol Eng Comput - Parameterisation of multi-scale continuum perfusion models from discrete vascular networks. ( 0,554134871355344 )
Comput. Biol. Med. - Reconstruction of patient-specific femurs using X-ray and sparse CT images. ( 0,55407813887513 )
J Integr Bioinform - Detection of cardiac geometry via difference intensity of echocardiogram images. ( 0,552191080380256 )
Comput Methods Programs Biomed - A novel tool for segmenting 3D medical images based on generalized cylinders and active surfaces. ( 0,550944129518132 )
IEEE Trans Vis Comput Graph - Energy Conservation for the Simulation of Deformable Bodies. ( 0,550773065806269 )
Comput Methods Programs Biomed - Simulation studies on depth of interaction effect correction using a Monte Carlo computed system matrix for brain positron emission tomography. ( 0,550598992522665 )
Int J Comput Assist Radiol Surg - Articular surface remodeling of the hip after periacetabular osteotomy. ( 0,550538092713137 )
Comput Math Methods Med - Discriminative random field segmentation of lung nodules in CT studies. ( 0,548848076651748 )
IEEE Trans Image Process - Collinear segment detection using HT neighborhoods. ( 0,548574281581779 )
Methods Inf Med - A generic framework for modeling brain deformation as a constrained parametric optimization problem to aid non-diffeomorphic image registration in brain tumor imaging. ( 0,548401364825503 )
IEEE Trans Image Process - Geometric flow approach for region-based image segmentation. ( 0,546036805998488 )
Med Biol Eng Comput - A fully automated human knee 3D MRI bone segmentation using the ray casting technique. ( 0,545601373191566 )
Comput. Biol. Med. - Computer-aided diagnosis of diabetic retinopathy: a review. ( 0,544860188506189 )
IEEE J Biomed Health Inform - Part-based multiderivative edge cross-sectional profiles for polyp detection in colonoscopy. ( 0,544205170031946 )
Int J Comput Assist Radiol Surg - 3D quantification of mandibular asymmetry using the SPHARM-PDM tool box. ( 0,54380074476737 )
Med Biol Eng Comput - Ictal and peri-ictal changes in cervical vagus nerve activity associated with cardiac effects. ( 0,542042073695403 )
Comput. Biol. Med. - Optic disc segmentation using the sliding band filter. ( 0,54163397524048 )
J Clin Monit Comput - Ability of the Masimo pulse CO-Oximeter to detect changes in hemoglobin. ( 0,541031885356696 )
IEEE Trans Image Process - Automated polar ice thickness estimation from radar imagery. ( 0,540292620978644 )
Neural Comput - Neural decoding with hierarchical generative models. ( 0,540120605489602 )
Med Biol Eng Comput - A CAD/CAM-prototyped anatomical condylar prosthesis connected to a custom-made bone plate to support a fibula free flap. ( 0,537997848012912 )
J Chem Inf Model - Economical and accurate protocol for calculating hydrogen-bond-acceptor strengths. ( 0,537986222384632 )
Comput Methods Programs Biomed - Liver segmentation in MRI: A fully automatic method based on stochastic partitions. ( 0,537534750924191 )
Comput. Biol. Med. - A level-set based approach for anterior teeth segmentation in cone beam computed tomography images. ( 0,537500190140726 )
Med Biol Eng Comput - Patient-specific computational fluid dynamics: structured mesh generation from coronary angiography. ( 0,537008951607637 )
Comput Math Methods Med - Automated image analysis of lung branching morphogenesis from microscopic images of fetal rat explants. ( 0,536958256847885 )
Comput Methods Programs Biomed - Numerical analysis of coronary artery bypass grafts: an over view. ( 0,536419265376936 )
Comput. Aided Surg. - Computer simulation of thromboexclusion of the complete aorta in the treatment of chronic type B aneurysm. ( 0,535458228524936 )
Int J Comput Assist Radiol Surg - Automatic segmentation of pulmonary blood vessels and nodules based on local intensity structure analysis and surface propagation in 3D chest CT images. ( 0,535169376196185 )
Comput. Aided Surg. - Three-dimensional reconstruction of extremity tumor regions by CT and MRI image data fusion for subject-specific preoperative assessment and planning. ( 0,534843227692416 )
Int J Comput Assist Radiol Surg - Fusion of coronary angiography and stress echocardiography for myocardial viability evaluation. ( 0,534388540035391 )
Int J Comput Assist Radiol Surg - Automatic subarachnoid space segmentation and hemorrhage detection in clinical head CT scans. ( 0,534158712069827 )
Comput Math Methods Med - Bayes clustering and structural support vector machines for segmentation of carotid artery plaques in multicontrast MRI. ( 0,534140216504212 )
Comput Math Methods Med - Embryonic heart morphogenesis from confocal microscopy imaging and automatic segmentation. ( 0,533981212719325 )
Comput Math Methods Med - A CT reconstruction algorithm based on non-aliasing Contourlet transform and compressive sensing. ( 0,533798732919692 )
Comput. Biol. Med. - Estimating contrast agent motion from ultrasound images using an anisotropic diffusion-based optical flow technique. ( 0,532628546429105 )
IEEE J Biomed Health Inform - A spatiotemporal-based scheme for efficient registration-based segmentation of thoracic 4-D MRI. ( 0,532549097774646 )
Med Biol Eng Comput - Computer methods for follow-up study of hemodynamic and disease progression in the stented coronary artery by fusing IVUS and X-ray angiography. ( 0,53235071174603 )
Int J Comput Assist Radiol Surg - GPU accelerated segmentation and centerline extraction of tubular structures from medical images. ( 0,5323058173683 )