当前位置： SCI文献检索 > ACADEMIC RADIOLOGY期刊下所有文献 > Validation of a new reference standard for the diagnosis of vasospasm.

Validation of a new reference standard for the diagnosis of vasospasm.

Abstract：

RATIONALE AND OBJECTIVES:The purpose of our study is to perform an internal validation of a new reference standard for vasospasm diagnosis in aneurysmal subarachnoid hemorrhage (A-SAH) patients. MATERIALS AND METHODS:A retrospective study was performed on A-SAH patients between January 2002 and May 2009. All patients were applied to this new reference standard using a multistage hierarchical approach incorporating clinical and imaging criteria. An internal validation method was performed in two phases to compare the new reference standard with digital subtraction angiography (DSA) and to assess accuracy. In Phase I, the diagnostic outcomes from DSA at the primary level were compared with the secondary/tertiary levels in the reference standard. In Phase II, the new reference standard was compared with chart diagnosis. Accuracy test characteristics, agreement rates, kappa values, and bias indices were calculated. RESULTS:In Phase I (n = 85), there was 87% agreement rate, 0.674 kappa, and 0.12 bias index. However, there was 100% agreement in patients diagnosed with vasospasm by DSA. Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were 100%, 61%, 83%, and 100% respectively. In Phase II (n = 137), there was 91% agreement rate, 0.824 kappa, and 0.04 bias index. Sensitivity, specificity, PPV, and NPV were 88%, 95%, 96%, and 87%, respectively. CONCLUSION:Performing validation methods for a new reference standard is an evolving and ongoing process because limitations and bias in the reference standard are identified. Based on the results of this internal validation, a modification in the new reference standard is made at the primary level, resulting in improvement in its accuracy and classification of A-SAH patients.

journal_name

Acad Radiol

journal_title

Academic radiology

authors

Reichman M,Gold R,Greenberg E,Ivanidze J,Elias E,Comunale J,Tsiouris AJ,Johnson C,Sanelli PC

doi

10.1016/j.acra.2010.04.025

subject

Has Abstract

pub_date

2010-09-01 00:00:00

pages

1083-9

issue

9

eissn

1076-6332

issn

1878-4046

pii

S1076-6332(10)00252-7

journal_volume

17

pub_type

杂志文章

相关文献

ACADEMIC RADIOLOGY文献大全
  • Diagnosis of inguinal lymph node metastases using contrast enhanced high resolution MR lymphangiography.

    abstract：RATIONALE AND OBJECTIVES:Inguinal lymph nodes can be the first or the only clinical signs of tumor metastases. The aim of the study was to evaluate the role of contrast-enhanced high-resolution magnetic resonance (MR) lymphangiography in diagnosis of inguinal lymph node metastases. MATERIALS AND METHODS:The study enro...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/j.acra.2012.09.014

    authors： Liu N,Yan Z,Lu Q,Wang C

    更新日期：2013-02-01 00:00:00

  • Computer-assisted detection of subcutaneous melanomas: feasibility assessment.

    abstract：RATIONALE AND OBJECTIVES:Subcutaneous melanomas may be missed on computed tomography because of their peripheral location or perceived unimportance, yet they can have clinical significance. The use of a novel computer-assisted detection scheme to locate subcutaneous melanoma lesions in body CT images was investigated. ...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/j.acra.2004.01.005

    authors： Solomon J,Mavinkurve S,Cox D,Summers RM

    更新日期：2004-06-01 00:00:00

  • A Review of Supplemental Screening Ultrasound for Breast Cancer: Certain Populations of Women with Dense Breast Tissue May Benefit.

    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

    authors： Burkett BJ,Hanemann CW

    更新日期：2016-12-01 00:00:00

  • Corona Virus International Public Health Emergencies: Implications for Radiology Management.

    abstract：:The outbreak of 2019 novel coronavirus (2019-nCoV) pneumonia was reported in Wuhan, Hubei Province, China in December 2019 and has spread internationally. This article discusses how radiology departments can most effectively respond to this public health emergency. ...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/j.acra.2020.02.003

    authors： Zhang HW,Yu J,Xu HJ,Lei Y,Pu ZH,Dai WC,Lin F,Wang YL,Wu XL,Liu LH,Li M,Mo YQ,Zhang H,Luo SP,Chen H,Lyu GW,Zhou ZG,Liu WM,Liu XL,Song HY,Chen FZ,Zeng L,Zhong H,Guo TT,Hu YQ,Yang XX,Liu PN,Li DF

    更新日期：2020-04-01 00:00:00

  • Iron oxide nanoparticles as magnetic resonance contrast agent for tumor imaging via folate receptor-targeted delivery.

    abstract：RATIONALE AND OBJECTIVE:Targeted delivery is a highly desirable strategy for diagnostic imaging because of enhanced efficacy and reduced dosage/toxicity. Receptor-targeting was used to deliver contrast-producing superparamagnetic iron oxide (IO) nanoparticle to receptor-expressing tumors for in vivo magnetic resonance ...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/j.acra.2004.04.018

    authors： Choi H,Choi SR,Zhou R,Kung HF,Chen IW

    更新日期：2004-09-01 00:00:00

  • Diffraction enhanced imaging of a rat model of gastric acid aspiration pneumonitis.

    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

    authors： Connor DM,Zhong Z,Foda HD,Wiebe S,Parham CA,Dilmanian FA,Cole EB,Pisano ED

    更新日期：2011-12-01 00:00:00

  • Social Media Utilization at an Academic Radiology Practice.

    abstract：RATIONALE AND OBJECTIVES:We report social media (SoMe) utilization trends at an academic radiology department, highlighting differences between trainees and faculty and between Baby Boomers versus Generation X and Millennials. MATERIALS AND METHODS:An anonymous online survey regarding SoMe utilization and SoMe-based e...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/j.acra.2017.08.012

    authors： Koontz NA,Kamer AP,Dodson SC,Capps AE,Tomblinson CM,Brown BP,Frank MS,Heitkamp DE

    更新日期：2018-01-01 00:00:00

  • High-resolution computed tomography of airway changes after induced bronchoconstriction and bronchodilation in asthmatic volunteers.

    abstract：RATIONALE AND OBJECTIVES:We examined whether high-resolution computed tomography (HRCT) would detect and quantify induced airway changes in asthmatic volunteers. METHODS:We performed pulmonary function tests and HRCT on eight asthmatic adults and two nonasthmatic control adults under three conditions: baseline, after ...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/s1076-6332(05)80671-3

    authors： Kee ST,Fahy JV,Chen DR,Gamsu G

    更新日期：1996-05-01 00:00:00

  • Monitoring breast cancer response to neoadjuvant systemic chemotherapy using parametric contrast-enhanced MRI: a pilot study.

    abstract：RATIONALE AND OBJECTIVES:Neoadjuvant systemic therapy (NST) is the standard treatment for locally advanced breast cancer and a common option for primary operable disease. It is important to develop standardized imaging techniques that can monitor and quantify response to NST enabling treatment tailored to each individu...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/j.acra.2007.02.005

    authors： Chou CP,Wu MT,Chang HT,Lo YS,Pan HB,Degani H,Furman-Haran E

    更新日期：2007-05-01 00:00:00

  • Prognostic vascular imaging biomarkers in high-grade gliomas: tumor permeability as an adjunct to blood volume estimates.

    abstract：RATIONALE AND OBJECTIVES:Despite recent advances in the treatment of high-grade gliomas, overall survival (OS) remains poor, which underlines the importance of searching for and determining prognostic imaging biomarkers. The purpose of our retrospective study was to correlate patient survival with relative cerebral blo...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/j.acra.2012.11.011

    authors： Jain R,Narang J,Griffith B,Bagher-Ebadian H,Scarpace L,Mikkelsen T,Littenberg B,Schultz LR

    更新日期：2013-04-01 00:00:00

  • Differentiating diaphragmatic paralysis and eventration.

    abstract：RATIONALE AND OBJECTIVES:Although elevation of the diaphragm can be appreciated on conventional PA and lateral chest radiography, the modality is commonly viewed as inadequate to differentiate diaphragmatic paralysis from eventration. Our objective was to qualitatively and quantitatively measure the utility of chest ra...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/j.acra.2007.01.027

    authors： Verhey PT,Gosselin MV,Primack SL,Kraemer AC

    更新日期：2007-04-01 00:00:00

  • Minimized Radiation and Contrast Agent Exposure for Coronary Computed Tomography Angiography: First Clinical Experience on a Latest Generation 256-slice Scanner.

    abstract：RATIONALE AND OBJECTIVES:The aim of the study was to evaluate the impact of the latest coronary computed tomography angiography (CCTA) techniques allowing a radiation- and contrast-sparing protocol on image quality in unselected patients referred for exclusion of suspected coronary artery disease (CAD). MATERIALS AND ...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/j.acra.2016.03.015

    authors： Benz DC,Gräni C,Hirt Moch B,Mikulicic F,Vontobel J,Fuchs TA,Stehli J,Clerc OF,Possner M,Pazhenkottil AP,Gaemperli O,Buechel RR,Kaufmann PA

    更新日期：2016-08-01 00:00:00

  • Information content and clarity of radiologists' reports for chest radiography.

    abstract：RATIONALE AND OBJECTIVES:We systematically characterized the information provided by chest radiography reports on a nationally representative sample of 822 elderly patients hospitalized in 297 acute-care hospitals in five states who had an admission diagnosis of congestive heart failure, acute myocardial infarction, or...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/s1076-6332(96)80407-7

    authors： Sobel JL,Pearson ML,Gross K,Desmond KA,Harrison ER,Rubenstein LV,Rogers WH,Kahn KL

    更新日期：1996-09-01 00:00:00

  • Detection of ductal carcinoma in situ with mammography, breast specific gamma imaging, and magnetic resonance imaging: a comparative study.

    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

    authors： Brem RF,Fishman M,Rapelyea JA

    更新日期：2007-08-01 00:00:00

  • Ultrasound monitoring of experimental ethanol injection into pig liver.

    abstract：RATIONALE AND OBJECTIVES:In percutaneous ethanol injection therapy, uncontrolled spread of ethanol sometimes causes complications. This study tested the accuracy of ultrasonography in showing the spread of ethanol during injection in normal postmortem pig livers. METHODS:Methylene blue-stained 96% (vol) ethanol (0.5-2...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/s1076-6332(05)80778-0

    authors： Tapani E,Vehmas T,Taavitsainen M

    更新日期：1994-09-01 00:00:00

  • Methodologic aspects of computed microtomography to monitor the development of osteoporosis in gastrectomized rats.

    abstract：RATIONALE AND OBJECTIVES:We investigated the methodologic development of computed microtomography (CMT) for monitoring the development of osteoporosis in male Sprague-Dawley rats. METHODS:Eight rats were gastrectomized and eight rats were sham operated. Femurs, tibias, and tails were prepared, and CMT scans with spati...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/s1076-6332(05)80487-8

    authors： Stenström M,Olander B,Carlsson CA,Carlsson GA,Håkanson R

    更新日期：1995-09-01 00:00:00

  • Extent of myocardial collateralization: determination with three-dimensional elastic-subtraction spiral CT.

    abstract：RATIONALE AND OBJECTIVES:This study was undertaken to develop a standard that can be used to assess new high-resolution collateral zone imaging methods. MATERIALS AND METHODS:The authors performed ex vivo helical CT in seven pig hearts after microsphere studies of blood flow and coronary angiography. They compared the...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/s1076-6332(97)80139-0

    authors： Pearlman JD,Laham RJ,Simons M,Gladstone S,Raptopoulos V

    更新日期：1997-10-01 00:00:00

  • Cause of satisfaction of search effects in contrast studies of the abdomen.

    abstract：RATIONALE AND OBJECTIVES:Extraintestinal abnormalities visible without contrast material on abdominal radiographs are reported less frequently when contrast examinations are performed. Gaze dwell time was used to determine whether this difference is due to failure by observers to scan plain-film regions of contrast stu...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/s1076-6332(96)80271-6

    authors： Berbaum KS,Franken EA Jr,Dorfman DD,Miller EM,Krupinski EA,Kreinbring K,Caldwell RT,Lu CH

    更新日期：1996-10-01 00:00:00

  • Recognition of Neonatal Lymphatic Flow Disorder: Fetal MR Findings and Postnatal MR Lymphangiogram Correlation.

    abstract：RATIONALE AND OBJECTIVES:This study aimed to describe prenatal and postnatal imaging features and outcomes of neonates with neonatal lymphatic disorders (NLDs). MATERIALS AND METHODS:An institutional review board-approved search of the radiology database for patients with NLD identified five patients. Inclusion criter...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/j.acra.2018.02.020

    authors： Biko DM,Johnstone JA,Dori Y,Victoria T,Oliver ER,Itkin M

    更新日期：2018-11-01 00:00:00

  • Clinical evaluation of wavelet-compressed digitized screen-film mammography.

    abstract：RATIONALE AND OBJECTIVES:The authors compared diagnostic accuracy and callback rates with conventional screen-film mammograms and wavelet-compressed digitized images. MATERIALS AND METHODS:Sixty sets of mammograms (four views per case) were digitized at a spatial resolution of 100 microm. The images were wavelet compr...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/s1076-6332(00)80004-5

    authors： Powell KA,Mallasch PG,Obuchowski NA,Kerczewski RJ,Ganobcik SN,Cardenosa G,Chilcote W

    更新日期：2000-05-01 00:00:00

  • Detectability of simulated brain activation using dual radioisotope SPECT based on size and intensity of the focal hyperactivity.

    abstract：RATIONALE AND OBJECTIVES:Simultaneous single-photon emission computed tomography (SPECT) neuroimaging with both technetium-99m (99mTc) hexamethylpropyleneamine oxime (HMPAO) and iodine-123 (123I) N-isopropyl-iodoamphetamine is a recently introduced method with potential for assessing activation phenomena in the brain. ...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/s1076-6332(05)80242-9

    authors： Bushnell DL,Madsen M,Cremer S,Kahn D,Kirchner PT

    更新日期：1995-01-01 00:00:00

  • CT-Radiomic Approach to Predict G1/2 Nonfunctional Pancreatic Neuroendocrine Tumor.

    abstract：RATIONALE AND OBJECTIVES:Tumor grading of nonfunctional pancreatic neuroendocrine tumors (NF-pNETs) determines the choice of clinical treatment and management. The pathological grade of pancreatic neuroendocrine tumors is usually assessed on postoperative specimens. The goal of our study is to establish a tumor grade (...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/j.acra.2020.01.002

    authors： Zhao Z,Bian Y,Jiang H,Fang X,Li J,Cao K,Ma C,Wang L,Zheng J,Yue X,Zhang H,Wang X,Madabhushi A,Xu J,Jin G,Lu J

    更新日期：2020-12-01 00:00:00

  • Multiphase contrast medium injection for optimization of computed tomographic coronary angiography.

    abstract：RATIONALE AND OBJECTIVES:Electron beam angiography is a minimally invasive imaging technique. Adequate vascular opacification throughout the study remains a critical issue for image quality. We hypothesized that vascular image opacification and uniformity of vascular enhancement between slices can be improved using mul...

    journal_title：Academic radiology

    pub_type： 杂志文章,随机对照试验

    doi：10.1016/j.acra.2005.09.087

    authors： Budoff MJ,Shinbane JS,Child J,Carson S,Chau A,Liu SH,Mao S

    更新日期：2006-02-01 00:00:00

  • Abbreviated screening protocol for breast MRI: a feasibility study.

    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

    authors： Grimm LJ,Soo MS,Yoon S,Kim C,Ghate SV,Johnson KS

    更新日期：2015-09-01 00:00:00

  • Myocardial Flow Reserve in Coronary Artery Disease with Low Attenuation Plaque: Coronary CTA and 13N-ammonia PET Assessments.

    abstract：RATIONALE AND OBJECTIVES:Physiological measurements from coronary angiography show that coronary stenosis with necrotic core plaque reduces coronary flow reserve (CFR). Myocardial flow reserve (MFR) estimated by 13N-ammonia PET (NH3-PET) is a different index from CFR. Low attenuation plaque (LAP) on coronary CTA (CCTA)...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/j.acra.2020.11.012

    authors： Yamamoto A,Nagao M,Ando K,Nakao R,Sakai A,Watanabe E,Momose M,Sato K,Fukushima K,Sakai S,Hagiwara N

    更新日期：2020-12-03 00:00:00

  • In vivo evaluation of a fluorine-acryl-stylene-urethane-silicone antithrombogenic coating material copolymer for intravascular stents.

    abstract：RATIONALE AND OBJECTIVES:We evaluated the effectiveness of a fluorine-acryl-styrene-urethane-silicone (FASUS) copolymer as an antithrombogenic coating material for intravascular stents in dogs. METHODS:FASUS copolymer-coated stents were placed in the right iliac veins, and uncoated 304 stainless steel stents were plac...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/s1076-6332(96)80223-6

    authors： Matsuhashi T,Miyachi H,Ishibashi T,Sakamoto K,Yamadera A

    更新日期：1996-07-01 00:00:00

  • Iohexol: effects on uptake of radioactive iodine in the thyroid and on thyroid function.

    abstract：RATIONALE AND OBJECTIVES:The authors attempted to determine whether the use of nonionic contrast media causes uptake of iodine by the thyroid to be blocked and whether use of these agents could cause iodine-induced hyperthyroidism. MATERIALS AND METHODS:Twenty-eight persons, including 22 with thyroid disease, were inc...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/s1076-6332(98)80026-3

    authors： Nygaard B,Nygaard T,Jensen LI,Court-Payen M,Søe-Jensen P,Nielsen KG,Fugl M,Hansen JM

    更新日期：1998-06-01 00:00:00

  • Bayesian regression methodology for estimating a receiver operating characteristic curve with two radiologic applications: prostate biopsy and spiral CT of ureteral stones.

    abstract：RATIONALE AND OBJECTIVES:The authors evaluated two Bayesian regression models for receiver operating characteristic (ROC) curve analysis of continuous diagnostic outcome data with covariates. MATERIALS AND METHODS:Full and partial Bayesian regression models were applied to data from two studies (n = 180 and 100, respe...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/s1076-6332(03)80578-0

    authors： Omalley AJ,Zou KH,Fielding JR,Tempany CM

    更新日期：2001-08-01 00:00:00

  • Automated segmentation of the liver from 3D CT images using probabilistic atlas and multilevel statistical shape model.

    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

    authors： Okada T,Shimada R,Hori M,Nakamoto M,Chen YW,Nakamura H,Sato Y

    更新日期：2008-11-01 00:00:00

  • Attenuation of contrast material-induced renal artery vasoconstriction by nitric oxide donors.

    abstract：RATIONALE AND OBJECTIVES:The authors studied the role of the endothelium and associated endothelial pathways in contrast material-induced renal vasoconstriction. MATERIALS AND METHODS:Isometric contractions in human and rabbit renal artery rings with intact and denuded endothelium were stimulated with phenylephrine an...

    journal_title：Academic radiology

    pub_type： 杂志文章

    doi：10.1016/s1076-6332(97)80254-1

    authors： Drescher P,Madsen PO

    更新日期：1997-12-01 00:00:00