Abstract:
PURPOSE:To identify predictors of clinically important abnormal findings in computed tomography (CT) images of the head among emergency department (ED) patients without a history of trauma. MATERIALS AND METHODS:Approval was obtained from the institutional research ethics board, and informed consent from patients was not required. This study was a retrospective review of consecutive unenhanced head CT examinations in patients aged 18 years or older who did not have trauma or known intracranial pathologic processes in ED from January 2004 through June 2006. Multivariable logistic regression was used to identify predictors of clinically important abnormal CT findings in the derivation cohort (CT examinations from January 1, 2004, through August 15, 2005), and the reproducibility of findings in a validation cohort (all subsequent CT scans through to June 30, 2006) was assessed. The strength of association of each variable was expressed with clinically important abnormal CT findings as adjusted odds ratio (OR) and 95% confidence interval (CI). RESULTS:Of 29 469 consecutive head CT images performed at a single institution between January 1, 2004, and June 30, 2006, 3967 were eligible for this study. Of the CT images in these patients, 548 (13.8%) revealed clinically important abnormalities. Six independent clinical predictors of important abnormal findings on head CT were identified: age (adjusted OR per 10-year increase: 1.17; 95% CI: 1.08, 1.28), focal neurologic deficit (adjusted OR: 5.39; 95% CI: 3.90, 7.47), altered mental status (adjusted OR: 2.32; 95% CI: 1.66, 3.25), history of malignancy (adjusted OR: 4.11; 95% CI: 2.28, 7.42), nausea and/or vomiting (adjusted OR: 2.22; 95% CI: 1.14, 4.33), and derangements in coagulation profile (adjusted OR: 1.91; 95% CI: 1.07, 3.41). CONCLUSION:This study identified several potential clinical predictors of abnormal head CT findings in ED patients who did not sustain trauma. Prospective validation of a clinical prediction rule in this population is warranted.
journal_name
Radiologyjournal_title
Radiologyauthors
Wang X,You JJdoi
10.1148/radiol.12120732subject
Has Abstractpub_date
2013-03-01 00:00:00pages
783-90issue
3eissn
0033-8419issn
1527-1315pii
radiol.12120732journal_volume
266pub_type
杂志文章相关文献
RADIOLOGY文献大全abstract::A linear-array, silicon pixel detector, capable of counting single photons, was applied to mammography by using a synchrotron radiation beam. Images were obtained of both a mammographic phantom and a breast-tissue sample. The phantom image was acquired with a mean glandular dose of 0.32 mGy. This detector combined wit...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.208.3.9722850
更新日期:1998-09-01 00:00:00
abstract:PURPOSE:To evaluate the effect of the introduction of digital mammography on the recall rate, detection rate, false-positive rate, and rates of invasive procedures in a cohort of women from four population-based breast cancer screening programs in Spain. MATERIALS AND METHODS:The study was approved by the ethics commi...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.10100874
更新日期:2011-02-01 00:00:00
abstract::Previous reports of angiomyolipoma have emphasized the ultrasonic finding of a very echogenic intrarenal mass. Ten cases of angiomyolipoma for which ultrasound examinations were available were retrospectively reviewed and correlated with their pathologic findings, and, when available, with computed tomographic finding...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.139.2.7220890
更新日期:1981-05-01 00:00:00
abstract:PURPOSE:To prospectively identify brain regions in which task-related changes in activation during a memory encoding task, measured with functional magnetic resonance (MR) imaging, correlate with degree of memory impairment across Alzheimer disease (AD), mild cognitive impairment (MCI), and elderly control subjects. M...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2451061847
更新日期:2007-10-01 00:00:00
abstract::Radiographs of 18 children thought to have carbonic anhydrase II deficiency were reviewed to assess intracranial calcification. These children have an autosomal recessive syndrome consisting of osteopetrosis, renal tubular acidosis, intracranial calcification, and developmental retardation. This calcification is in th...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.157.2.2413500
更新日期:1985-11-01 00:00:00
abstract::Fifty patients with chronic urinary tract schistosomiasis were studied with 99mTc-DTPA. All had a flow study, sequential analog imaging, and digital imaging for 25-35 minutes (20-sec. frames). Time-activity curves (DTPA renograms) were extracted; 12 patients had 131I-Hippuran probe renograms as well. Renal changes inc...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.140.2.7019960
更新日期:1981-08-01 00:00:00
abstract::Computed tomography (CT) is the modality of choice for evaluation of pancreatic disease. In this prospective study, images obtained with spiral CT, which enables examination of a region of the body in a single breath-hold, were compared with those obtained by means of dynamic CT with automatic table incrementation in ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.183.3.1584940
更新日期:1992-06-01 00:00:00
abstract::High-resolution, real-time ultrasonography (US) with graded compression was used to evaluate 90 patients with clinically suspected acute appendicitis. US visualization of a noncompressible appendix was the primary criterion for a diagnosis of acute appendicitis. The overall sensitivity was 89%, the specificity was 95%...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.163.1.3547490
更新日期:1987-04-01 00:00:00
abstract::A distinctive type of artifactual extravascular assignment of color was identified in 49 color Doppler ultrasound (US) examinations in 43 patients. This artifact appeared as a random localized mixture of red and blue assigned to perivascular soft tissues; the artifact varied with the cardiac cycle, being most prominen...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.171.3.2655000
更新日期:1989-06-01 00:00:00
abstract:PURPOSE:To determine whether a 10-minute magnetic resonance (MR) imaging examination of the upper abdomen provides sufficiently comprehensive information to replace a longer MR protocol. MATERIALS AND METHODS:Images obtained with selected breathing-independent and breath hold MR sequences, with 2 minutes of total acqu...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.211.1.r99ap32189
更新日期:1999-04-01 00:00:00
abstract::In the early years of nuclear medicine, physicians explored applied nuclear physics, and physicists pursued uncharted areas in medicine. Reflections from Jim Adelstein, MD, PhD, John McAfee, MD, Henry Wagner, MD, Fred Bonte, MD, Dave Kuhl, MD, and Alex Gottschalk, MD, add to the appreciation of the diversity in those ...
journal_title:Radiology
pub_type: 历史文章,杂志文章
doi:10.1148/radiology.214.3.r00mr33623
更新日期:2000-03-01 00:00:00
abstract::The "comet tail" is a well-known ultrasound artifact that appears as a series of parallel bands radiating from a source. This artifact was observed in the gallbladder lumen in eight of 10 patients after extracorporeal shock wave lithotripsy of radiolucent calculi. To investigate the cause of the comet tail artifact, c...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.177.1.2204960
更新日期:1990-10-01 00:00:00
abstract::A new type of intravenous digital subtraction angiography using an extra large field size is reported. Excellent image quality of large field size enables better evaluation of widespread vascular disease and eliminates the need for repeated injections of contrast material in almost all patients. ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.156.3.2862660
更新日期:1985-09-01 00:00:00
abstract::The authors reviewed the accuracy of stereotaxic fine-needle aspiration cytology in prediction of the presence of cancer. Seventy-four nonpalpable breast cancers and 144 benign lesions were studied. The rate of obtaining an inadequate sample was 8.1% for cancers and 20.8% for benign lesions. None of the cytology repor...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.173.1.2675190
更新日期:1989-10-01 00:00:00
abstract:PURPOSE:To clarify the magnetic resonance (MR) imaging characteristics of focal cortical dysplasia (FCD). MATERIALS AND METHODS:The authors reviewed the MR images of 14 patients with FCD, which was confirmed with histologic examination. RESULTS:MR images exhibited FCD in 13 of the 14 patients. All lesions were locali...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.203.2.9114120
更新日期:1997-05-01 00:00:00
abstract:PURPOSE:To quantify tumor perfusion after transcatheter arterial embolization (TAE) with functional computed tomography (CT) and to validate the reproducibility of quantification measurements. MATERIALS AND METHODS:This study was conducted in accordance with an institutional animal care and use committee-approved prot...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2371040526
更新日期:2005-10-01 00:00:00
abstract:PURPOSE:To test whether susceptibility-weighted magnetic resonance imaging at baseline may help predict cognitive decline. MATERIALS AND METHODS:This prospective study was approved by the institutional review board, and written informed consent was obtained from all participants. Thirty-five healthy control subjects a...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.10100612
更新日期:2010-12-01 00:00:00
abstract::A prospective study had demonstrated the clinical usefulness of water-delay ultrasound as a means of routinely imaging the intracranial contents in infants younger than one year of age. Correlation between ultrasound and CT images was excellent, showing both normal and pathological anatomy. This technique is most help...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.134.1.7350600
更新日期:1980-01-01 00:00:00
abstract::Purpose To evaluate the impact of accountable care organizations (ACOs) on use of screening mammography in the Medicare Shared Savings Program (MSSP), the largest value-based reimbursement program in U.S. HISTORY:Materials and Methods Institutional review board approval was waived, as the study used publicly availabl...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2016160554
更新日期:2017-02-01 00:00:00
abstract::The authors describe mammographic and pathologic evidence of the growth of a fibroadenoma in an 82-year-old obese woman, 44 years after menopause, who had never been treated with hormone therapy. The patient's obesity is hypothesized as the causal factor for increased estrogen levels leading to growth of the fibroaden...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.184.2.1620840
更新日期:1992-08-01 00:00:00
abstract::History A 47-year-old Sudanese man without a known remarkable medical history presented to the emergency department for a syncopal episode. The patient denied chest pain, dyspnea, focal weakness, or prior similar episodes. He was originally from north Sudan and eventually moved to Saudi Arabia, where he worked as a fa...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2019171769
更新日期:2019-10-01 00:00:00
abstract::Between the portal vein and the inferior vena cava lies a small space that may be occupied by multiple anatomic structures including the caudate and papillary processes of the caudate lobe of the liver, portacaval lymph nodes, replaced or accessory right hepatic arteries, posterosuperior pancreaticoduodenal vessels, t...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.156.2.4011910
更新日期:1985-08-01 00:00:00
abstract::Twenty-two patients with synthetic ossicular replacements were studied with computed tomography (CT). Twelve patients had total ossicular replacement prostheses (TORPs), and ten patients had partial ossicular replacement prostheses (PORPs). Good results were achieved in 12 patients (eight with TORPs and four with PORP...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.163.3.3575730
更新日期:1987-06-01 00:00:00
abstract::The radiopharmaceutical iodine 131 metaiodobenzylguanidine (I-131 MIBG) has been shown to locate pheochromocytomas scintigraphically with a false-negative rate of approximately 13%. To improve image quality and reduce the false-negative rate, I-123 was examined as a radioactive label for MIBG, as it has many advantage...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.155.3.4001380
更新日期:1985-06-01 00:00:00
abstract:PURPOSE:To compare the subjective Likert score to the Prostate Imaging Reporting and Data System (PIRADS) and morphology-location-signal intensity (MLS) scores for categorization of prostate lesions as benign or malignant at multiparametric magnetic resonance (MR) imaging. MATERIALS AND METHODS:Two hundred fifteen pat...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.14131584
更新日期:2014-08-01 00:00:00
abstract:PURPOSE:To evaluate the effect of preprocedural prediction of the best tube angle obliquity for visualization of the uterine artery origin by using three-dimensional (3D)-reconstructed contrast material-enhanced magnetic resonance (MR) angiography on the radiation dose, fluoroscopy time, and contrast medium volume duri...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2513081751
更新日期:2009-06-01 00:00:00
abstract::Multi-detector row computed tomography was performed for the preharvest evaluation of 14 potential living liver donors. Both a biliary contrast agent and a conventional iodinated contrast agent were administered intravenously. This protocol included acquisition of three subsequent scans and allowed accurate assessment...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2242011340
更新日期:2002-08-01 00:00:00
abstract::Cystic hepatoblastomas share ultrasonographic characteristics with simple hepatic cysts; however, a distinction can be made by the demonstration of internal septations. The differentiation is important because cystic hepatoblastoma may have malignant potential. The ultrasonographic and scintigraphic findings in five c...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.138.1.6256810
更新日期:1981-01-01 00:00:00
abstract::On computed tomographic scans of the upper abdomen the interface sign can help distinguish pleural and intra-abdominal fluid readily and accurately. A hazy interface between the fluid and liver or spleen is characteristic of pleural fluid. A sharp interface is characteristic of ascites. The interface sign has proved t...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.144.2.7089290
更新日期:1982-07-01 00:00:00
abstract::This case is reported because of the unusual blood findings, no duplicate of which I have ever seen described. Whether the blood picture represents merely a freakish poikilocytosis or is dependent on some peculiar physical or chemical condition of the blood, or is characteristic of some particular disease, I cannot at...
journal_title:Radiology
pub_type: 杂志文章,评审
doi:10.1148/radiology.206.2.9457180
更新日期:1998-02-01 00:00:00