J Digit Imaging - Detection of the optic nerve head in fundus images of the retina with Gabor filters and phase portrait analysis.

Tópicos

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

Resumo

We propose a method using Gabor filters and phase portraits to automatically locate the optic nerve head (ONH) in fundus images of the retina. Because the center of the ONH is at or near the focal point of convergence of the retinal vessels, the method includes detection of the vessels using Gabor filters, detection of peaks in the node map obtained via phase portrait analysis, and an intensity-based condition. The method was tested on 40 images from the Digital Retinal Images for Vessel Extraction (DRIVE) database and 81 images from the Structured Analysis of the Retina (STARE) database. An ophthalmologist independently marked the center of the ONH for evaluation of the results. The evaluation of the results includes free-response receiver operating characteristics (FROC) and a measure of distance between the manually marked and detected centers. With the DRIVE database, the centers of the ONH were detected with an average distance of 0.36 mm (18 pixels) to the corresponding centers marked by the ophthalmologist. FROC analysis indicated a sensitivity of 100% at 2.7 false positives per image. With the STARE database, FROC analysis indicated a sensitivity of 88.9% at 4.6 false positives per image.

Resumo Limpo

propos method use gabor filter phase portrait automat locat optic nerv head onh fundus imag retina center onh near focal point converg retin vessel method includ detect vessel use gabor filter detect peak node map obtain via phase portrait analysi intensitybas condit method test imag digit retin imag vessel extract drive databas imag structur analysi retina stare databas ophthalmologist independ mark center onh evalu result evalu result includ freerespons receiv oper characterist froc measur distanc manual mark detect center drive databas center onh detect averag distanc mm pixel correspond center mark ophthalmologist froc analysi indic sensit fals posit per imag stare databas froc analysi indic sensit fals posit per imag

Resumos Similares

Comput. Biol. Med. - Real-time electrocardiogram P-QRS-T detection-delineation algorithm based on quality-supported analysis of characteristic templates. ( 0,76959286668902 )
Methods Inf Med - Central sleep apnea detection from ECG-derived respiratory signals. Application of multivariate recurrence plot analysis. ( 0,735034895246131 )
Comput. Biol. Med. - Automatic identification of fetal breathing movements in fetal RR interval time series. ( 0,727169568443812 )
Comput. Biol. Med. - A correlation analysis-based detection and delineation of ECG characteristic events using template waveforms extracted by ensemble averaging of clustered heart cycles. ( 0,718691631094191 )
Int J Neural Syst - Kernel collaborative representation-based automatic seizure detection in intracranial EEG. ( 0,717761222741069 )
Med Biol Eng Comput - ECG signal analysis for the assessment of sleep-disordered breathing and sleep pattern. ( 0,698285818888221 )
J Med Syst - Field programmable gate array based fuzzy neural signal processing system for differential diagnosis of QRS complex tachycardia and tachyarrhythmia in noisy ECG signals. ( 0,684428303921925 )
J Clin Monit Comput - Pulse oximetry saturation patterns detect repetitive reductions in airflow. ( 0,683345917510044 )
Comput Methods Programs Biomed - Dual transmission model and related spectral content of the fetal heart sounds. ( 0,676458618943493 )
Comput. Biol. Med. - Synergistic combination of clinical and imaging features predicts abnormal imaging patterns of pulmonary infections. ( 0,674637743003206 )
Int J Comput Assist Radiol Surg - Automated MR morphometry to predict Alzheimer's disease in mild cognitive impairment. ( 0,671812941866951 )
Comput. Biol. Med. - Reducing sojourn points from recurrence plots to improve transition detection: Application to fetal heart rate transitions. ( 0,665113156805383 )
Comput Methods Programs Biomed - Influence of QRS complex detection errors on entropy algorithms. Application to heart rate variability discrimination. ( 0,664720669086785 )
Int J Neural Syst - Automated seizure detection using EKG. ( 0,659479637467575 )
Med Biol Eng Comput - Quasi real-time gait event detection using shank-attached gyroscopes. ( 0,651090381683762 )
Int J Comput Assist Radiol Surg - Hybrid method for the detection of pulmonary nodules using positron emission tomography/computed tomography: a preliminary study. ( 0,650206683174284 )
IEEE J Biomed Health Inform - Automatic identification and classification of muscle spasms in long-term EMG recordings. ( 0,648163481270667 )
Med Biol Eng Comput - Analysis of retinal fundus images for grading of diabetic retinopathy severity. ( 0,63887778833778 )
Comput Math Methods Med - Reducing false alarms of intensive care online-monitoring systems: an evaluation of two signal extraction algorithms. ( 0,638609931812526 )
Med Biol Eng Comput - Towards optimum chest compression performance during constant peak displacement cardiopulmonary resuscitation. ( 0,631378604924644 )
Comput Methods Programs Biomed - Detection of c, d, and e waves in the acceleration photoplethysmogram. ( 0,617242491046265 )
Int J Comput Assist Radiol Surg - Detection and quantification of intracerebral and intraventricular hemorrhage from computed tomography images with adaptive thresholding and case-based reasoning. ( 0,614323586935323 )
Comput Methods Programs Biomed - Detection of heartbeat and respiration from optical interferometric signal by using wavelet transform. ( 0,610718542745867 )
IEEE J Biomed Health Inform - Automatic annotation of seismocardiogram with high-frequency precordial accelerations. ( 0,605961667503531 )
Comput. Biol. Med. - Automated detection of the osseous acetabular rim using three-dimensional models of the pelvis. ( 0,603662927035794 )
Methods Inf Med - Monitoring nocturnal heart rate with bed sensor. ( 0,601799056446441 )
J Clin Monit Comput - Monitoring of breathing phases using a bioacoustic method in healthy awake subjects. ( 0,600849757377062 )
Int J Comput Assist Radiol Surg - Diffusion tensor tractography of normal facial and vestibulocochlear nerves. ( 0,60068615574306 )
Int J Neural Syst - Multi-instance dictionary learning for detecting abnormal events in surveillance videos. ( 0,600367757576386 )
Med Biol Eng Comput - Online apnea-bradycardia detection based on hidden semi-Markov models. ( 0,599591255542813 )
Comput. Biol. Med. - Non-uniform multivariate embedding to assess the information transfer in cardiovascular and cardiorespiratory variability series. ( 0,597669035580524 )
Med Biol Eng Comput - Detection of occult paroxysmal atrial fibrillation. ( 0,597611482423649 )
Int J Comput Assist Radiol Surg - Ventilatory impairment detection based on distribution of respiratory-induced changes in pixel values in dynamic chest radiography: a feasibility study. ( 0,596552114439128 )
Methods Inf Med - Robust detection of sleep apnea from Holter ECGs. Joint assessment of modulations in QRS amplitude and respiratory myogram interference. ( 0,596078431372549 )
IEEE Trans Pattern Anal Mach Intell - Automatic and Accurate Shadow Detection using Near-Infrared Information. ( 0,595628814930074 )
Comput. Biol. Med. - Retinal vessel extraction by matched filter with first-order derivative of Gaussian. ( 0,594873415284172 )
Comput. Biol. Med. - An image feature approach for computer-aided detection of ischemic stroke. ( 0,591842805513564 )
Comput Methods Programs Biomed - Accurate detection of blood vessels improves the detection of exudates in color fundus images. ( 0,589957954642928 )
Comput. Biol. Med. - An evaluation of the effects of wavelet coefficient quantisation in transform based EEG compression. ( 0,589023872907997 )
Med Biol Eng Comput - Abnormal localization of immature precursors (ALIP) detection for early prediction of acute myelocytic leukemia (AML) relapse. ( 0,586301354487882 )
Comput. Biol. Med. - Detection of artifacts from high energy bursts in neonatal EEG. ( 0,585974303871506 )
Med Biol Eng Comput - Automatic breath-to-breath analysis of nocturnal polysomnographic recordings. ( 0,584227781759559 )
Med Biol Eng Comput - An endotracheal intubation confirmation system based on carina image detection: a proof of concept. ( 0,582641379521276 )
J Clin Monit Comput - Detection of respiratory compromise by acoustic monitoring, capnography, and brain function monitoring during monitored anesthesia care. ( 0,582440742127045 )
J Clin Monit Comput - Capability of a neck worn device to measure sleep/wake, airway position, and differentiate benign snoring from obstructive sleep apnea. ( 0,57949698031186 )
Comput. Biol. Med. - A statistical approach for determination of time plane features from digitized ECG. ( 0,575309356519824 )
J Clin Monit Comput - Detection of endobronchial intubation by monitoring the CO2 level above the endotracheal cuff. ( 0,5747198286004 )
Int J Comput Assist Radiol Surg - Computer-aided focal liver lesion detection. ( 0,574652355973009 )
IEEE Trans Image Process - Interlayer bit allocation for scalable video coding. ( 0,570761235127077 )
IEEE Trans Image Process - An algorithm for power line detection and warning based on a millimeter-wave radar video. ( 0,569997639595821 )
Comput Methods Programs Biomed - Unsupervised skin lesions border detection via two-dimensional image analysis. ( 0,56959124061563 )
Artif Intell Med - Classification of healthy and abnormal swallows based on accelerometry and nasal airflow signals. ( 0,568603240894466 )
Med Biol Eng Comput - Fingertip photoplethysmographic waveform variability and systemic vascular resistance in intensive care unit patients. ( 0,568358080155605 )
J Med Syst - Estimating the mutual information between bilateral breast in thermograms using nonparametric windows. ( 0,564532014660386 )
J Med Syst - A pilot study on image analysis techniques for extracting early uterine cervix cancer cell features. ( 0,564449971220142 )
J Am Med Inform Assoc - Phenotyping for patient safety: algorithm development for electronic health record based automated adverse event and medical error detection in neonatal intensive care. ( 0,564350706951665 )
Med Biol Eng Comput - Detection of movement-related cortical potentials based on subject-independent training. ( 0,563103471534203 )
Comput Math Methods Med - Novel application of a multiscale entropy index as a sensitive tool for detecting subtle vascular abnormalities in the aged and diabetic. ( 0,562867151236952 )
IEEE J Biomed Health Inform - Detection of respiratory arousals using photoplethysmography (PPG) signal in sleep apnea patients. ( 0,562445754375688 )
Comput. Biol. Med. - A user-operated test of suprathreshold acuity in noise for adult hearing screening: The SUN (Speech Understanding in Noise) test. ( 0,559892439729955 )
Neural Comput - A multiscale correlation of wavelet coefficients approach to spike detection. ( 0,555700824563037 )
Comput Methods Programs Biomed - Automatic multi-modal intelligent seizure acquisition (MISA) system for detection of motor seizures from electromyographic data and motion data. ( 0,551398510768263 )
J Am Med Inform Assoc - Adjusting outbreak detection algorithms for surveillance during epidemic and non-epidemic periods. ( 0,551023920038686 )
J Am Med Inform Assoc - Syndromic surveillance for health information system failures: a feasibility study. ( 0,54543075314787 )
Med Biol Eng Comput - GPU-based real-time detection and analysis of biological targets using solid-state nanopores. ( 0,544377727568534 )
IEEE Trans Pattern Anal Mach Intell - Video Event Detection: From Subvolume Localization To Spatio-Temporal Path Search. ( 0,542336605984022 )
Comput Methods Programs Biomed - Creating a virtual slide map from sputum smear images for region-of-interest localisation in automated microscopy. ( 0,542088514325907 )
J. Comput. Biol. - Feature detection with controlled error rates in LC/MS images. ( 0,540946824095399 )
Comput. Biol. Med. - Differential operator in seizure detection. ( 0,539035965679485 )
Int J Comput Assist Radiol Surg - Arterial contour detectability in head CT angiography. ( 0,536038585227298 )
J Clin Monit Comput - Analysis of plethysmographic waveform changes induced by beach chair positioning under general anesthesia. ( 0,535780718426344 )
J Digit Imaging - Accuracy of an automatic patient-positioning system based on the correlation of two edge images in radiotherapy. ( 0,535536664328855 )
IEEE J Biomed Health Inform - The effects of lossy compression on diagnostically relevant seizure information in EEG signals. ( 0,533819775902505 )
AMIA Annu Symp Proc - Computer surveillance of patients at high risk for and with venous thromboembolism. ( 0,53322432948198 )
IEEE J Biomed Health Inform - Robust and sensitive video motion detection for sleep analysis. ( 0,532065310754886 )
IEEE J Biomed Health Inform - Automated detection of sleep apnea and hypopnea events based on robust airflow envelope tracking in the presence of breathing artifacts. ( 0,53143182638628 )
J Biomed Inform - Recovery at the edge of error: debunking the myth of the infallible expert. ( 0,530769352210089 )
BMC Med Inform Decis Mak - Outbreak detection algorithms for seasonal disease data: a case study using Ross River virus disease. ( 0,530698772891426 )
IEEE Trans Image Process - Lightweight detection of additive watermarking in the DWT-domain. ( 0,530261047869496 )
Comput. Biol. Med. - Early detection of epileptic seizures based on parameter identification of neural mass model. ( 0,529366374234268 )
Comput Methods Programs Biomed - Fall detection for multiple pedestrians using depth image processing technique. ( 0,528603285335598 )
Neural Comput - Detection of hidden structures in nonstationary spike trains. ( 0,527047285896959 )
IEEE Trans Pattern Anal Mach Intell - Robust Text Detection in Natural Scene Images. ( 0,525738249543761 )
Comput Math Methods Med - Smart spotting of pulmonary TB cavities using CT images. ( 0,525367781104885 )
Med Biol Eng Comput - Optimal features for online seizure detection. ( 0,525286180188533 )
IEEE Trans Image Process - Archive film defect detection and removal: an automatic restoration framework. ( 0,52402345460211 )
Methods Inf Med - Detection algorithm for single motor unit firing in surface EMG of the trapezius muscle. ( 0,523595242816675 )
IEEE J Biomed Health Inform - Surface EMG decomposition based on K-means clustering and convolution kernel compensation. ( 0,521147281595703 )
IEEE Trans Image Process - Fast video shot boundary detection based on SVD and pattern matching. ( 0,521023067326209 )
Int J Comput Assist Radiol Surg - Combination of computer-aided detection algorithms for automatic lung nodule identification. ( 0,520886093145384 )
Methods Inf Med - Time-varying methods for characterizing nonstationary dynamics of physiological systems. ( 0,519985602433344 )
Comput Math Methods Med - Extraction of prostatic lumina and automated recognition for prostatic calculus image using PCA-SVM. ( 0,518360453509025 )
Med Biol Eng Comput - Automated detection of perinatal hypoxia using time-frequency-based heart rate variability features. ( 0,517283124719476 )
J Telemed Telecare - Recognition of root canal orifices at a distance - a preliminary study of teledentistry. ( 0,515786838399617 )
Comput Math Methods Med - Automated detection of healthy and diseased aortae from images obtained by contrast-enhanced CT scan. ( 0,515265972089392 )
BMC Med Inform Decis Mak - Manual and automated methods for identifying potentially preventable readmissions: a comparison in a large healthcare system. ( 0,514964117614118 )
Comput Math Methods Med - An improved computer vision method for white blood cells detection. ( 0,514495755427526 )
Comput Math Methods Med - New estimators and guidelines for better use of fetal heart rate estimators with Doppler ultrasound devices. ( 0,513806812399397 )
Comput Methods Programs Biomed - QRS detection based on wavelet coefficients. ( 0,513640438728386 )
IEEE Trans Image Process - Noise-resistant local binary pattern with an embedded error-correction mechanism. ( 0,513603632753177 )