Abstract:
:Continuous wave (CW) and pulsed Doppler ultrasound studies with spectral analysis were used to detect the left coronary arterial blood flow in patients who were undergoing routine echocardiography. The pulmonary artery is a stable ultrasonic landmark from which detection of the blood flow can be effected. The left coronary artery can be distinguished by its blood flow toward the cardiac apex and by specific, functional flow features. Flow patterns vary among the left main, circumflex, and anterior descending arteries; patterns also vary with respiration cycles. In the present study, coronary arterial blood flow was detected in 58 of 70 patients (83%). Findings were validated by selectively injecting an agitated saline contrast medium into the left coronary artery and, in another study, by comparing human Doppler phasic flow waveforms with electromagnetic flowmeter recordings obtained in dogs.
journal_name
Radiologyjournal_title
Radiologyauthors
Gramiak R,Holen J,Moss AJ,Gutierrez OH,Picone AL,Roe SAdoi
10.1148/radiology.159.3.3517950subject
Has Abstractpub_date
1986-06-01 00:00:00pages
657-62issue
3eissn
0033-8419issn
1527-1315journal_volume
159pub_type
杂志文章相关文献
RADIOLOGY文献大全abstract:PURPOSE:To retrospectively determine if three-dimensional (3D) viewing improves radiologists' accuracy in classifying true-positive (TP) and false-positive (FP) polyp candidates identified with computer-aided detection (CAD) and to determine candidate polyp features that are associated with classification accuracy, wit...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2393050418
更新日期:2006-06-01 00:00:00
abstract::Forty-two patients underwent intraarterial digital subtraction angiography (DSA) of the carotid or renal arteries, utilizing a new 4-F aortic flush catheter; 37 procedures were percutaneous transbrachial, five were percutaneous transfemoral. Image quality was consistently good or excellent. The safety of nonselective ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.153.3.6387800
更新日期:1984-12-01 00:00:00
abstract::Fluoroscopically guided percutaneous needle aspiration of focal pulmonary lesions was performed in 108 presumed infectious episodes in 82 immunocompromised patients in whom prior diagnostic studies, including transtracheal aspiration, were negative to inconclusive. Two-thirds of the lesions were 4 cm or smaller. Singl...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/132.3.563
更新日期:1979-09-01 00:00:00
abstract:PURPOSE:To describe the timeliness of follow-up care in community-based settings among women who receive a recommendation for immediate follow-up during the screening mammography process and how follow-up timeliness varies according to facility and facility-level characteristics. MATERIALS AND METHODS:This was an inst...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.11102472
更新日期:2011-11-01 00:00:00
abstract::The purpose of this study was to demonstrate the feasibility of computing three-dimensional relaxation maps of spin-lattice relaxation time in the rotating frame (T1rho) from in vivo magnetic resonance (MR) images of the human patellofemoral joint. T1rho was measured by applying a three-dimensional gradient-echo pulse...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2291021041
更新日期:2003-10-01 00:00:00
abstract:PURPOSE:To evaluate the usefulness of Doppler ultrasonography (US) in the diagnosis of hyperfiltration in patients with insulin-dependent diabetes mellitus (IDDM). MATERIALS AND METHODS:Eighty-one consecutive patients with IDDM were studied. All patients were normotensive and had normal creatinine and blood urea nitro...
journal_title:Radiology
pub_type: 临床试验,杂志文章
doi:10.1148/radiology.209.3.9844680
更新日期:1998-12-01 00:00:00
abstract::Major socioeconomic changes in the practice of medicine in the past 2 decades have had a great impact on diagnostic radiology and have encouraged other physicians and entrepreneurs to enter many areas of this specialty. Major alterations in the practice of diagnostic radiology will be required if the specialty is to s...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/172.3.889
更新日期:1989-09-01 00:00:00
abstract::The concept of diffusion magnetic resonance (MR) imaging emerged in the mid-1980s, together with the first images of water diffusion in the human brain, as a way to probe tissue structure at a microscopic scale, although the images were acquired at a millimetric scale. Since then, diffusion MR imaging has become a pil...
journal_title:Radiology
pub_type: 杂志文章,评审
doi:10.1148/radiol.2015150244
更新日期:2016-01-01 00:00:00
abstract::Twenty-one children with acute leukemia received irradiation to the renal area for the following reasons: hypertension (2 patients); oliguria (5 patients); mass-related symptoms (5 patients); and as an adjuvant to supportive medical management in preventing renal failure (9 patients). All but 2 patients exhibited bone...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/117.3.687
更新日期:1975-12-01 00:00:00
abstract::To assess the potential of in vivo magnetic resonance (MR) spectroscopy for breast cancer, hydrogen-1 and phosphorus-31 MR spectra of five malignant human breast tumors were compared with those of unaffected breast tissue. The water-to-fat ratio was high in the tumors (average, 2.2) but low in the unaffected tissue (a...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.169.3.2847230
更新日期:1988-12-01 00:00:00
abstract:PURPOSE:To evaluate initial radiologic findings of symptomatic intracranial vertebrobasilar dissections (VBDs) as well as the results at follow-up imaging of dissections that are conservatively managed. MATERIALS AND METHODS:The respective institutional review boards approved this retrospective study and waived the ne...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.12112331
更新日期:2012-07-01 00:00:00
abstract:PURPOSE:To evaluate magnetic resonance (MR) hydrometry, a method of quantifying fluid amounts by using MR imaging, for assessing the exocrine function of the pancreas after stimulation with secretin. MATERIALS AND METHODS:Images were obtained with a single-shot turbo spin-echo sequence by using a 1.0-T magnet with a q...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.218.1.r01ja2061
更新日期:2001-01-01 00:00:00
abstract::Schmieder and colleagues introduced a new molecular magnetic resonance (MR) probe with a promising lipophilic gadolinium chelate complex that provides high relaxivity. Results of in vivo experiments clearly demonstrate the excellence of the probe for longitudinally monitoring α(v)β(3) integrin expression in tumors. In...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.13131094
更新日期:2013-08-01 00:00:00
abstract:PURPOSE:To compare percutaneous self-expanding metal stents with conventional endoscopic polyethylene endoprostheses for treatment of malignant biliary obstruction by means of a prospective randomized clinical trial. MATERIALS AND METHODS:Patients with biliary obstruction due to inoperable primary carcinoma of the pan...
journal_title:Radiology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1148/radiol.2243011517
更新日期:2002-10-01 00:00:00
abstract:PURPOSE:To test the technical feasibility and results of placement of metal stents into ureters obstructed by extensive tumor. MATERIALS AND METHODS:Six consecutive patients (two men and four women, aged 35-66 years and with incurable malignancies) underwent insertion of metallic endoprostheses in nine obstructed uret...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.191.3.8184060
更新日期:1994-06-01 00:00:00
abstract::In a retrospective study, thin-walled cystic lesions were identified in four patients with proved bronchioalveolar carcinoma (BAC). The radiographic appearances are described, and possible mechanisms of formation of the lesions are discussed. Although such appearances due to BAC have rarely been described in the liter...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.185.2.1329140
更新日期:1992-11-01 00:00:00
abstract:PURPOSE:To compare the use of dynamic oxygen-enhanced magnetic resonance (MR) imaging with the use of quantitatively assessed computed tomography (CT) for assessment of clinical stage and evaluation of pulmonary functional change due to treatment in patients with asthma. MATERIALS AND METHODS:The institutional review ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.14132660
更新日期:2014-12-01 00:00:00
abstract:PURPOSE:To report population-based utilization rates and their variability across and within populations, geographic areas, and different payment systems for diagnostic radiology and radiation oncology procedures. MATERIALS AND METHODS:Aggregated claims data were obtained from four sources for up to nine radiologic mo...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.200.1.8657910
更新日期:1996-07-01 00:00:00
abstract:PURPOSE:To evaluate the accuracy of technetium-99m sestamibi as a single agent in the detection and localization of hyperfunctioning parathyroid tissue in patients who underwent prior neck exploration or who otherwise are high surgical risks. MATERIALS AND METHODS:Thirty-nine patients with hyperparathyroidism underwen...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.197.3.7480730
更新日期:1995-12-01 00:00:00
abstract::Three cases of a basilar/middle meningeal artery anastomosis are demonstrated angiographically. No reference to previous angiographic demonstration of this vascular anomaly has been found in the literature, and only one similar case with an anatomical description has been located. An embryological explanation of this ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/118.2.367
更新日期:1976-02-01 00:00:00
abstract::Twenty-three patients with malignant hepatic tumors underwent magnetic resonance (MR) imaging before and after intravenous administration of gadolinium-diethylene-triaminepentaacetic acid (DTPA). Two different doses were used, 0.1 mmol/kg and 0.2 mmol/kg. The larger dose proved to be more effective than the smaller do...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.164.2.3037590
更新日期:1987-08-01 00:00:00
abstract::A phase-contrast cine magnetic resonance (MR) imaging technique was used to study normal dynamics of cerebrospinal fluid (CSF) in 10 healthy volunteers and four patients with normal MR images. This pulse sequence yielded 16 quantitative flow-encoded images per cardiac cycle (peripheral gating). Flow encoding depicted ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.178.2.1987610
更新日期:1991-02-01 00:00:00
abstract::The author reviews the regulatory process through which new cardiovascular interventional devices reach the hands of the interventional radiologist and the cardiologist. The marketing mechanisms are outlined, as are the data requirements. The reader is taken step-by-step from device investigation conducted under an ap...
journal_title:Radiology
pub_type: 临床试验,杂志文章
doi:10.1148/radiology.174.3.174-3-923
更新日期:1990-03-01 00:00:00
abstract:PURPOSE:To determine the value of magnetic resonance (MR) imaging in predicting resectability of head and neck neoplasms around the carotid arteries. MATERIALS AND METHODS:Forty-nine patients (28 male patients and 21 female patients aged 17-79 years; mean, 57.3 years) with head and neck masses and clinical evidence of...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.195.3.7754000
更新日期:1995-06-01 00:00:00
abstract:PURPOSE:To assess whether radiologic technologists could be successfully trained to identify abnormalities on mammograms. MATERIALS AND METHODS:Eight radiologic technologists from two different institutions took a pretest, underwent an 8-hour training course followed by a period of preceptorship, and then took a postt...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.194.1.7997550
更新日期:1995-01-01 00:00:00
abstract::The effects of 30-minute intravenous and superior mesenteric artery (SMA) infusions of vasopressin in dosages of 2.75 mU and 14 mU per min per kg were compared in five dogs that had cirrhosis and portal hypertension induced by fractionated intraportal polyvinyl alcohol injections. A reduction in portal pressure of app...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.142.3.6977790
更新日期:1982-03-01 00:00:00
abstract::A new catheter system was designed for percutaneous fragmentation of large pulmonary emboli. The device consists of an impeller rotating at high speed at the center of a self-expandable basket at the tip of a 7-F catheter. The highly flexible catheter was able to reach all tested embolus sites in a glass model of the ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.180.1.2052680
更新日期:1991-07-01 00:00:00
abstract:PURPOSE:To investigate the effect of a meal on splanchnic circulation in patients with cirrhosis of the liver. MATERIALS AND METHODS:Ten adult patients with cirrhosis and 10 adult control subjects (mean age, 54 years) underwent duplex ultrasonography. Flow volumes of the portal vein, superior mesenteric artery, spleni...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.201.3.8939220
更新日期:1996-12-01 00:00:00
abstract:PURPOSE:To evaluate the effectiveness of noninvasive magnetic resonance (MR) imaging-guided focused ultrasonographic (US) ablation of breast carcinomas. MATERIALS AND METHODS:Before undergoing tumor resection, 12 patients with invasive breast carcinomas were treated with MR imaging-guided focused US ablation consistin...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2281012163
更新日期:2003-06-01 00:00:00
abstract:PURPOSE:To evaluate the data acquired over 2 1/2 years regarding the use of mechanical thrombolysis as the routine, preferred treatment for thrombosed access grafts in a large patient population undergoing hemodialysis. MATERIALS AND METHODS:Mechanical thrombolysis was performed in 1,176 cases. Data were collected on ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.200.3.8756920
更新日期:1996-09-01 00:00:00