Abstract：
RATIONALE AND OBJECTIVES:Introduction of combination of the segmentation tool SegoMeTex and the virtual endoscopy system VIVENDI to perform virtual endoscopic inspections of the human lung. This virtual bronchoscopy system enables visualization of the tracheobronchial tree down to seventh generation. Furthermore, the modified virtual system visualizes hidden structures such as segmented vascular system or tumors. MATERIALS AND METHODS:The segmentation is based on image data acquired by a multislice computed tomography scanner. SegoMeTex is used to segment the tracheobronchial tree by a hybrid system with minimal user action. Similarly, the complementary pulmonary arterial can be segmented, whereas additional structures such as tumors are marked manually. On this dataset, subsequently, data structures of the inner surface for virtual endoscopy are generated. Finally, the dataset can be explored by a virtual bronchoscopy procedure using the VIVENDI system. RESULTS:The segmentation method was successfully tested on 22 patients. The hybrid segmentation system identified bronchi up to the sixth generation with a sensitivity of more than 58%, and a positive predictive value of more than 90%. After the segmentation, the datasets are explored interactively (>30 fps on a standard personal computer platform in real-time rendering) using the virtual endoscopy software. The exploration exposed a high-quality reconstruction, even of small structures throughout the dataset. CONCLUSION:Virtual bronchoscopy in combining with a highly sensitive segmentation is a valuable tool for the localization and measurement of stenosis for resection planning.
journal_name
Acad Radioljournal_title
Academic radiologyauthors
Mayer D,Bartz D,Fischer J,Ley S,del Río A,Thust S,Kauczor HU,Heussel CPdoi
10.1016/j.acra.2004.01.012keywords:
subject
Has Abstractpub_date
2004-05-01 00:00:00pages
551-65issue
5eissn
1076-6332issn
1878-4046pii
S1076633204000583journal_volume
11pub_type
杂志文章abstract：RATIONALE AND OBJECTIVES:An atlas-based automated liver segmentation method from three-dimensional computed tomographic (3D CT) images has been developed. The method uses two types of atlases, a probabilistic atlas (PA) and a statistical shape model (SSM). MATERIALS AND METHODS:Voxel-based segmentation with a PA is fi...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2008.07.008
更新日期：2008-11-01 00:00:00
abstract：:Breast density has been shown to be a strong, independent risk factor for breast cancer. Unfortunately, mammography is less accurate on dense breast tissue compared to fattier breast tissue. Multiple studies suggest a solution to this by demonstrating the ability of supplemental screening ultrasound to detect addition...
journal_title：Academic radiology
pub_type： 杂志文章,评审
doi：10.1016/j.acra.2016.05.017
更新日期：2016-12-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:To investigate the capability of delta-radiomics to predict pathological complete response (pCR) after neoadjuvant chemoradiotherapy (nCRT) in patients with locally advanced rectal cancer (LARC). MATERIALS AND METHODS:This retrospective study enrolled 165 consecutive patients with LARC (traini...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2020.10.026
更新日期：2020-11-11 00:00:00
abstract：:At our institution, we have developed a remediation team of strong, focused experts who help us with struggling learners in making the diagnosis and then coaching on their milestone deficits. It is key for all program directors to recognize struggling residents because early recognition and intervention gives the resi...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2016.12.022
更新日期：2017-06-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:This study aimed to determine whether uterine leiomyoma can be distinguished from uterine leiomyosarcoma on ultrasound (US), computed tomography (CT), and/or magnetic resonance imaging (MRI) without diffusion-weighted imaging. MATERIALS AND METHODS:Institutional review board approval was obtai...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2016.06.004
更新日期：2016-10-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:To determine the impact of COVID-19 workflow changes on patient throughput at the outpatient imaging facilities of a large healthcare system in New York City. MATERIALS AND METHODS:COVID-19 workflow changes to permit social distancing and patient and staff safety included screening at the time...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2020.12.016
更新日期：2021-01-04 00:00:00
abstract：OBJECTIVE:This study was to investigate the CT quantification of COVID-19 pneumonia and its impacts on the assessment of disease severity and the prediction of clinical outcomes in the management of COVID-19 patients. MATERIALS METHODS:Ninety-nine COVID-19 patients who were confirmed by positive nucleic acid test (NAT...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2020.09.004
更新日期：2020-12-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:We introduce a new approach to the prediction of final infarct growth in human acute ischemic stroke based on image analysis of the apparent diffusion coefficient (ADC) maps obtained from magnetic resonance imaging. Evidence from multiple previous studies indicate that ADC maps are likely to re...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2007.07.007
更新日期：2008-01-01 00:00:00
abstract：BACKGROUND:To evaluate the utilization and efficacy of various treatments for management of adult patients with splenic trauma, highlighting the evolving role of splenic artery embolization. MATERIALS AND METHODS:The National Trauma Data Bank (NTDB) was queried for patients who sustained splenic trauma between 2007 an...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2020.11.010
更新日期：2020-12-04 00:00:00
abstract：RATIONALE AND OBJECTIVES:In assessing diagnostic accuracy it is often essential to determine the reader's ability both to detect and to correctly locate multiple abnormalities per patient. The authors developed a new approach for the detection and localization of multiple abnormalities and compared it with other approa...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/s1076-6332(00)80324-4
更新日期：2000-07-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:Severe calcifications of the coronary arteries are still a major challenge in coronary computed tomography (CT) angiography (CCTA). Subtraction CCTA using a 320-detector row CT scanner has recently been introduced for patients with severe calcifications. However, the conventional subtraction CC...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2016.04.012
更新日期：2016-09-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:To investigate the correlation between prevalence and degree of coronary artery calcification (CAC) and extracoronary calcifications (ECCs), scored quantitatively according to Agatston and semiquantitatively by visual analysis, in chest computed tomography (CT) studies obtained for lung cancer ...
journal_title：Academic radiology
pub_type： 杂志文章,评审
doi：10.1016/j.acra.2015.03.005
更新日期：2015-07-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:To compare the performance of two shortened breast magnetic resonance imaging (MRI) protocols to a standard MRI protocol for breast cancer screening. MATERIALS AND METHODS:In this Health Insurance Portability and Accountability Act compliant, institutional review board-approved pilot study, th...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2015.06.004
更新日期：2015-09-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:The aim of this study was to investigate the effect of perfusion computed tomography (PCT) with acetazolamide (ACZ) challenge and compare it to 10% carbon dioxide (CO(2)) challenge in rat C6 glioma. MATERIALS AND METHODS:PCT was performed on 32 rats, including 20 with orthotopically implanted ...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2011.09.017
更新日期：2012-02-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:Pulmonary vascular alteration is one of the characteristic features of chronic obstructive pulmonary disease (COPD). Recent studies suggest that vascular alteration is closely related to endothelial dysfunction and may be further influenced by emphysema. However, the relationship between morpho...
journal_title：Academic radiology
pub_type： 临床试验,杂志文章
doi：10.1016/j.acra.2009.07.022
更新日期：2010-01-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:To investigate residents' knowledge of adverse effects of ionizing radiation, frequency of their education on radiation safety, and their use of radioprotective equipment. MATERIALS AND METHODS:Residents from 15/16 residency programs at Emory University were asked to complete a resident radiat...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2014.01.016
更新日期：2014-07-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:To evaluate the ability of dynamic contrast-enhanced magnetic resonance imaging (MRI) to differentiate several tumor entities of the parotid gland in a prospective clinical trial. MATERIALS AND METHODS:A total of 112 patients with parotid tumors were examined with dynamic contrast-enhanced 1.5...
journal_title：Academic radiology
pub_type： 临床试验,杂志文章
doi：10.1016/j.acra.2007.03.004
更新日期：2007-06-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:To validate the hypothesis that a multisegmented approach during subtraction computed tomography (CT) angiography of the lower extremities can improve bone removal efficiency by suppressing regional motion. MATERIALS AND METHODS:The institutional review board of our hospital approved this retr...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2011.01.024
更新日期：2011-07-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:We sought to evaluate the diagnostic performance of high-resolution magnetic resonance imaging (MRI) and conventional MRI of the knee on a standard-field-strength MRI system compared to arthroscopic findings in patients with suspected meniscal tears. MATERIALS AND METHODS:Forty-two patients (2...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2008.02.007
更新日期：2008-07-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:The authors evaluated changes of lung attenuation in pigs, with special attention to the mosaic pattern of low attenuation, at thin-section computed tomography (CT) after obstruction of the proximal pulmonary artery with a detachable balloon. MATERIALS AND METHODS:In seven pigs, nine sites of ...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/s1076-6332(98)80241-9
更新日期：1998-12-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:The aim of the study was to investigate the optimal protocols of dual-source computed tomography (CT) angiography in aortic stent grafting in terms of image noise and radiation dose, based on an in vitro phantom study. MATERIALS AND METHODS:A series of helical CT cans were performed on a human...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2010.03.004
更新日期：2010-07-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:Diffraction-enhanced imaging (DEI) is a type of phase contrast x-ray imaging that has improved image contrast at a lower dose than conventional radiography for many imaging applications, but no studies have been done to determine if DEI might be useful for diagnosing lung injury. The goals of t...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2011.08.005
更新日期：2011-12-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:Total kidney volume is an important biomarker for the evaluation of autosomal dominant polycystic kidney disease progression. In this study, we present a novel approach for automated segmentation of polycystic kidneys from non-contrast-enhanced computed tomography (CT) images. MATERIALS AND ME...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2017.11.015
更新日期：2018-07-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:The goal of this article is to analyze and compare the performance of a developed mass computer-aided detection (CAD) system that takes breast density information into account when using manual or automatic breast density annotations in the training step. The advantages of considering this brea...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2010.04.013
更新日期：2010-07-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:To assess computed tomographic (CT) signs that have been described in published studies for the diagnosis of appendicitis to identify independent findings that predict appendicitis. METHODS AND MATERIALS:A retrospective database search identified 67 patients with a CT scan of the abdomen/pelvi...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2008.02.009
更新日期：2008-08-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:Hepatic ischemia/reperfusion injury (IRI) occurs during certain hepatobiliary surgeries, hemorrhagic shock, and veno-occlusive disease. Biochemical changes caused by hepatic IRI lead to hepatocellular remodeling, including cellular regeneration or irreversible apoptosis. This study aims to char...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2010.09.019
更新日期：2011-02-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:Since the initial description of an intralobar attenuation gradient by Webb et al, it has been suggested that departure from the intralobar attenuation gradient could indicate early lung diseases. However, its significance has not been determined in detail. We aimed to quantify the anteroposter...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2005.10.025
更新日期：2006-05-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:Dimeric nonionic iodinated contrast has a lower osmolality than monomeric nonionic iodinated contrast but is available at lower iodine concentrations. Less dilution of intravascular fluid by influx from the extravascular space is proposed to occur with decreasing osmolality. The purpose of this...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2005.01.015
更新日期：2005-05-01 00:00:00
abstract：RATIONALE AND OBJECTIVES:The purpose of this study was to investigate the potential effects of patient size and radiation dose on the accuracy of iodine quantification using dual-source dual-energy computed tomography (CT). MATERIALS AND METHODS:Three phantoms representing different patient sizes were constructed, con...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2019.12.027
更新日期：2021-01-01 00:00:00
abstract：:Cryoablation is one of several minimally invasive treatments that may be suitable for a targeted treatment of prostate cancer. Because efficacy is improved when a sufficiently cold end temperature is reached, the purpose of this work was to demonstrate an image-based thermometry method that could provide temperature m...
journal_title：Academic radiology
pub_type： 杂志文章
doi：10.1016/j.acra.2005.06.006
更新日期：2005-09-01 00:00:00
