Abstract:
RATIONALE AND OBJECTIVES:The aim of this study was to evaluate whether texture analysis (TA) can detect subtle changes in cerebral tissue caused by mild traumatic brain injury (MTBI) and to determine whether these changes correlate with neuropsychological and diffusion tensor imaging (DTI) findings. MATERIALS AND METHODS:Forty-two patients with MTBIs were imaged using 1.5T magnetic resonance imaging within 3 weeks after head injury. TA was performed for the regions corresponding to the mesencephalon, centrum semiovale, and corpus callosum. Using DTI, the fractional anisotropic and apparent diffusion coefficient values for the same regions were evaluated. The same analyses were performed on a group of 10 healthy volunteers. Patients also underwent a battery of neurocognitive tests within 6 weeks after injury. RESULTS:TA revealed textural differences between the right and left hemispheres in patients with MTBIs, whereas differences were minimal in healthy controls. A significant correlation was found between scores on memory tests and texture parameters (sum of squares, sum entropy, inverse difference moment, and sum average) in patients in the area of the mesencephalon and the genu of the corpus callosum. Significant correlations were also found between texture parameters for the left mesencephalon and both fractional anisotropic and apparent diffusion coefficient values. CONCLUSIONS:The data suggest that heterogeneous texture and abnormal DTI patterns in the area of the mesencephalon may be linked with verbal memory deficits among patients with MTBIs. Therefore, TA combined with DTI in patients with MTBIs may increase the ability to detect early and subtle neuropathologic changes.
journal_name
Acad Radioljournal_title
Academic radiologyauthors
Holli KK,Wäljas M,Harrison L,Liimatainen S,Luukkaala T,Ryymin P,Eskola H,Soimakallio S,Ohman J,Dastidar Pdoi
10.1016/j.acra.2010.04.009subject
Has Abstractpub_date
2010-09-01 00:00:00pages
1096-102issue
9eissn
1076-6332issn
1878-4046pii
S1076-6332(10)00230-8journal_volume
17pub_type
杂志文章abstract:RATIONALE AND OBJECTIVES:We sought to identify factors associated with high levels of external research funding in order to provide departments with information that may help them increase their external research funding. MATERIALS AND METHODS:National Institutes of Health (NIH) data on grants were analyzed to identif...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2006.09.052
更新日期:2006-12-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The long-term prospects for patients with peripheral-arterial-occlusive disease (PAOD) must be considered in the context of coexistent generalized atherosclerosis. We sought to determine the added clinical information of noninvasive magnetic resonance imaging (MRI) for detecting asymptomatic at...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2009.08.008
更新日期:2010-02-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Chest radiographs are recommended for prevention and detection of pneumoconiosis. In 2011, the International Labour Office (ILO) released a revision of the International Classification of Radiographs of Pneumoconioses that included a digitized standard images set. The present study compared res...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2013.11.019
更新日期:2014-03-01 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 evaluate the correlations of tracheal volume and collapsibility on inspiratory and end-expiratory computed tomography (CT) with lung volume and with lung function in smokers. MATERIALS AND METHODS:The institutional review board approved this study at each institution. 85 smokers (mean age 6...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2010.11.005
更新日期:2011-03-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:To retrospectively analyze the significance of 3.0-T contrast-enhanced (CE) magnetic resonance angiography (MRA) with calf compression in the lower limbs of diabetic patients with peripheral vascular disease. MATERIALS AND METHODS:Sixty-one type 2 diabetes patients underwent both MRA and digit...
journal_title:Academic radiology
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.acra.2011.01.013
更新日期:2011-06-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The purpose of this multicenter, multireader study was to evaluate the performance of computed tomography (CT) lung nodule computer-aided detection (CAD) software as a second reader. METHODS AND MATERIALS:The study involved 109 patients from four sites. The data were collected from a variety o...
journal_title:Academic radiology
pub_type: 杂志文章,多中心研究
doi:10.1016/j.acra.2007.09.027
更新日期:2008-03-01 00:00:00
abstract::Imaging screening examinations are growing in their indications and volume to identify conditions at an early, treatable stage. The Radiology Research Alliance's 'Role of Imaging in Health Screening' Task Force provides a review of imaging-based screening rationale, economics, and describes established guidelines by v...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2020.03.038
更新日期:2020-05-11 00:00:00
abstract:RATIONALE AND OBJECTIVES:To evaluate the reproducibility of Modified Response Evaluation Criteria in Solid Tumors (mRECIST) for hepatocellular carcinoma (HCC) after transarterial chemoembolization (TACE) using multiphasic computed tomography. MATERIALS AND METHODS:The institutional review board approved this retrospec...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2018.02.013
更新日期:2018-11-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The aim of this study was to develop a computer-aided diagnosis (CAD) system in assessing the sonographic morphologic and texture features of soft-tissue tumors. MATERIALS AND METHODS:The retrospective study involved 114 pathology proven cases including 73 benign and 41 malignant soft-tissue t...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2009.07.024
更新日期:2009-12-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:To evaluate conspicuity of screen-detected cancers on two-dimensional synthetic mammography (SM) reconstructed from digital breast tomosynthesis (DBT) compared to two-dimensional full field digital mammography (FFDM). MATERIALS AND METHODS:IRB-approved retrospective review of consecutive scree...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2019.06.008
更新日期:2020-06-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The aim of this study was to assess similarities and differences between methods of performance comparisons under binary (yes or no) and receiver-operating characteristic (ROC)-type pseudocontinuous (0-100) rating data ascertained during an observer performance study of interpretation of full-f...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2009.12.012
更新日期:2010-05-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The authors performed this study to compare magnetic resonance (MR) venography and conventional venography in the diagnosis of deep venous thrombosis (DVT) in the calf after sonography. MATERIALS AND METHODS:Sonography was performed in 595 patients who were suspected of having lower-extremity ...
journal_title:Academic radiology
pub_type: 临床试验,杂志文章
doi:10.1016/s1076-6332(03)80764-x
更新日期:2001-09-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:To quantify the relationship between dose of contrast administered and contrast kinetics of malignant breast lesions. MATERIALS AND METHODS:A total of 108 patients with 120 malignant lesions were selected for an institutional review board-approved review. Dynamic magnetic resonance protocol: o...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2009.06.015
更新日期:2010-01-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Morphologic changes of the human brain during healthy aging provide useful reference knowledge for age-related brain disorders. The aim of this study was to explore age-related global and regional morphological changes of healthy adult brains. MATERIALS AND METHODS:T1-weighted magnetic resonan...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2012.03.006
更新日期:2012-07-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Positron emission tomography (PET) is used to evaluate response to therapy with increasing interest in having PET provide endpoints for clinical trials. Here we demonstrate impacts of PET measurement error and choice of quantification method on clinical trial design. MATERIALS AND METHODS:Samp...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2011.10.008
更新日期:2012-02-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Urinary calculi are now commonly detected with helical computed tomography (CT), and it has been proposed that stone composition can be determined from CT attenuation values. However, typical scans are made with a beam collimation of 5 mm or more, resulting in volume averaging and reduction in ...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/S1076-6332(03)80619-0
更新日期:2001-06-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The segmentation of airways from CT images is a critical first step for numerous virtual bronchoscopic (VB) applications. Automatic or semiautomatic methods are necessary, since manual segmentation is prohibitively time consuming. The methods must be robust and operate within a reasonable time ...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/s1076-6332(03)80517-2
更新日期:2002-10-01 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:Diffusion tensor tractography offers a unique perspective of white matter anatomy, but proper delineation of white matter tracts of interest generally requires the active involvement of an expert neuroanatomist. The investigators describe the implementation of an automated tractographic method ...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2012.01.002
更新日期:2012-05-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Quantitative measurement provides essential information about disease progression and treatment response in patients with glioblastoma multiforme (GBM). The goal of this article is to present and validate a software pipeline for semi-automatic GBM segmentation, called AFINITI (Assisted Follow-u...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2012.03.026
更新日期:2012-08-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:To assess the diagnostic performance of magnetic resonance imaging (MRI) for targeting prostate cancer in patients with previous negative biopsies and elevated prostate-specific antigen (PSA) levels. MATERIALS AND METHODS:Pubmed, Scopus, and Cochrane Library databases were searched to identify...
journal_title:Academic radiology
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.acra.2014.01.004
更新日期:2014-05-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:We developed a technique for estimating the volumes of distribution and intratumoral ethanol concentrations using computed tomography (CT) scanning in patients undergoing percutaneous ethanol injection (PEI) treatment of malignant hepatic tumors. METHODS:A phantom containing anhydrous ethanol ...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/S1076-6332(96)80333-3
更新日期:1996-01-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:An automated method for identification and segmentation of acute/subacute ischemic stroke, using the inherent bi-fold symmetry in brain images, is presented. An accurate and automated method for localization of acute ischemic stroke could provide physicians with a mechanism for early detection ...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2008.03.013
更新日期:2008-09-01 00:00:00
abstract::This case study chronicles the impact of Hurricane Katrina on the Department of Radiology at the Louisiana State University School of Medicine in New Orleans and the department's subsequent efforts to recover and re-dedicate itself to providing quality patient care and resident education. Hurricane Katrina damaged the...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2009.01.016
更新日期:2009-05-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Sample-size estimation is an important consideration when planning a receiver operating characteristic (ROC) study. The aim of this work was to assess the prediction accuracy of a sample-size estimation method using the Monte Carlo simulation method. MATERIALS AND METHODS:Two ROC ratings simul...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2010.01.007
更新日期:2010-05-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Emphysema is a hallmark of chronic obstructive pulmonary disease. The primary aim of this study was to investigate inter- and intraobserver agreement of visual assessment of mild emphysema in low-dose multidetector computed tomography of subjects in the pilot SCAPIS in order to certify consiste...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2019.06.019
更新日期:2020-05-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:To evaluate the sensitivity of high-resolution breast-specific gamma imaging (BSGI) for the detection of ductal carcinoma in situ (DCIS) based on histopathology and to compare the sensitivity of BSGI with mammography and magnetic resonance imaging (MRI) for the detection of DCIS. MATERIALS AND...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2007.04.004
更新日期:2007-08-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The purpose of this study was to evaluate the American College of Radiology (ACR) accreditation phantom for assessing image quality in digital mammography. MATERIALS AND METHODS:Digital images were obtained of an ACR accreditation phantom at varying mAs (constant kVp) and varying kVp (constant...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/s1076-6332(03)80345-8
更新日期:2002-07-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Test sets for assessing and improving radiologic image interpretation have been used for decades and typically evaluate performance relative to gold standard interpretations by experts. To assess test sets for screening mammography, a gold standard for whether a woman should be recalled for add...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2013.01.012
更新日期:2013-06-01 00:00:00