Abstract:
:An innovative magnetic resonance imaging technique was applied to the measurement of blood flow in the abdominal aorta. The technique combines selective excitation and visualization from an orthogonal view. The distance that fluid has moved is directly visualized. The blood flow velocity at every 50 msec throughout the cardiac cycle was measured in a short time (about 4 minutes) using electrocardiographic gating and repeated excitations in each cycle. Measurements were compared with those obtained by Doppler ultrasound (US) as a reference. The pulsatile change of flow velocity in the cycle correlated well with the Doppler US recording. Two flow velocity indexes, peak flow velocity and the velocity integral, also showed good correlation (r = .98 for both). This method is applicable for clinical use and is useful for measurement of high flow rates, as found in arteries.
journal_name
Radiologyjournal_title
Radiologyauthors
Matsuda T,Shimizu K,Sakurai T,Fujita A,Ohara H,Okamura S,Hashimoto S,Tamaki S,Kawai Cdoi
10.1148/radiology.162.3.3544040subject
Has Abstractpub_date
1987-03-01 00:00:00pages
857-61issue
3eissn
0033-8419issn
1527-1315journal_volume
162pub_type
杂志文章相关文献
RADIOLOGY文献大全abstract:PURPOSE:To assess the feasibility of automatic needle-guide tracking by using a real-time phase-only cross correlation ( POCC phase-only cross correlation ) algorithm-based sequence for transrectal 3-T in-bore magnetic resonance (MR)-guided prostate biopsies. MATERIALS AND METHODS:This study was approved by the ethics...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.14132067
更新日期:2014-12-01 00:00:00
abstract::Cortical fissuring, a well-recognized radiographic sign of osteomyelitis, represents spread of infection through the haversian system with osteoclastic bone resorption. In the proper clinical setting this finding may be recognized before there is other evidence of bone destruction or periosteal reaction. Three cases a...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.141.1.7027310
更新日期:1981-10-01 00:00:00
abstract::A lateral view of the knee in 90 degree flexion can reveal popliteal cysts which do not show on routine arthrography. Flexion causes transfer of intra-articular fluid to the posterior portion of the joint space, lowering pressure within the cyst and allowing it to fill with contrast media. ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/115.2.480
更新日期:1975-05-01 00:00:00
abstract:PURPOSE:To assess the value of resistive index (RI) and systolic acceleration time (SAT) for diagnosis of stenoses and thromboses of the hepatic artery in liver transplant recipients. MATERIALS AND METHODS:Doppler sonograms and angiograms in 125 liver transplant recipients were correlated and analyzed for any statisti...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.192.3.8058930
更新日期:1994-09-01 00:00:00
abstract::The authors report two cases of coexistent pneumomediastinum and diabetic ketoacidosis. One patient had pneumothorax as well. Hyperpnea or vomiting, or a combination of the two, may be the etiologic agent in such cases. The prognosis is excellent and there is prompt regression of the pneumomediastinum following correc...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/116.3.543
更新日期:1975-09-01 00:00:00
abstract::Primary and secondary lung malignancies are often treated with surgery. Many patients are poor surgical candidates owing to advanced age or medical comorbidities. Alternatives to surgery for localized disease include radiation therapy and the newer treatments known as image-guided thermal ablation. Image-guided therma...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.11091126
更新日期:2011-09-01 00:00:00
abstract::Idiopathic interstitial pneumonias comprise usual interstitial pneumonia (UIP), nonspecific interstitial pneumonia (NSIP), desquamative interstitial pneumonia (DIP), respiratory bronchiolitis-associated interstitial lung disease (RB-ILD), cryptogenic organizing pneumonia (COP), acute interstitial pneumonia (AIP), and ...
journal_title:Radiology
pub_type: 杂志文章,评审
doi:10.1148/radiol.2361031674
更新日期:2005-07-01 00:00:00
abstract::Background Cardiac MRI late gadolinium enhancement (LGE) scar volume is an important marker for outcome prediction in patients with hypertrophic cardiomyopathy (HCM); however, its clinical application is hindered by a lack of measurement standardization. Purpose To develop and evaluate a three-dimensional (3D) convolu...
journal_title:Radiology
pub_type: 杂志文章,多中心研究
doi:10.1148/radiol.2019190737
更新日期:2020-01-01 00:00:00
abstract::Hippurate function scintiscans were obtained in prone and standing positions in a group of 76 patients with concurrent hypertension and nephroptosis. TWelve of these patients had massive, bilateral disturbance of intrarenal hippurate transport in the standing position; hippurate transport was normal in the prone posit...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.140.1.7244230
更新日期:1981-07-01 00:00:00
abstract:PURPOSE:To develop a noninvasive method for demonstrating the main salivary gland duct systems. MATERIALS AND METHODS:The authors developed a magnetic resonance (MR) imaging protocol that uses a heavily T2-weighted (echo time, 750 msec), fat-suppressed pulse sequence and rapid acquisition with relaxation enhancement. ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.200.1.8657900
更新日期:1996-07-01 00:00:00
abstract::The use of specialized coils to improve signal-to-noise ratios in magnetic resonance (MR) imaging is an important innovation. The role of surface coils has not yet been well defined, but it seems likely that they will be routinely used for clinical imaging of the orbit, neck, and spine. Surface coils have important li...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.157.2.4048470
更新日期:1985-11-01 00:00:00
abstract::Magnetic resonance imaging techniques were applied to in vivo spectroscopic analysis of spatially resolved phosphorus spectra in the cat brain to determine whether changes associated with stroke could be detected. Two-dimensional images of separate phosphorus-containing compounds, as well as spectra arising from spati...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.153.3.6494470
更新日期:1984-12-01 00:00:00
abstract:PURPOSE:To evaluate the indications for and complications, accuracy, and techniques of percutaneous adrenal biopsy performed from 1982 through 1991 at the authors' institution. MATERIALS AND METHODS:Two hundred seventy-seven percutaneous adrenal biopsies were performed in 270 patients (175 male and 102 female patients...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.193.2.7972740
更新日期:1994-11-01 00:00:00
abstract::Forty computed tomography (CT)-assisted aspirations performed with only hand guidance were prospectively compared with 40 performed with a CT body-stereotaxic system. Although there was no statistically significant difference in lesion size and path length between the two groups, use of stereotaxis compared with hand ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.166.2.3275980
更新日期:1988-02-01 00:00:00
abstract:PURPOSE:To compare the accuracy of a fluid-attenuated inversion-recovery (FLAIR) sequence with that of a conventional double spin-echo (SE) sequence in the identification of increased signal intensity of the hippocampus in mesial temporal sclerosis (MTS). MATERIALS AND METHODS:Three blinded reviewers independently gra...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.199.2.8668780
更新日期:1996-05-01 00:00:00
abstract:PURPOSE:To determine the appropriate radiologic criteria of metastatic retropharyngeal lymph nodes (RLNs) in patients with nasopharyngeal carcinoma (NPC). MATERIALS AND METHODS:After institutional review board approval and informed consent, 303 consecutive NPC patients treated with definitive radiation therapy were ex...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.10090289
更新日期:2010-05-01 00:00:00
abstract::Purpose To investigate whether sinovenous outflow restriction (SOR) is more strongly associated with hemorrhage than cortical venous reflux (CVR) in patients with lateral sinus dural arteriovenous fistulas (DAVFs). Materials and Methods An institutional review board approved this retrospective study and waiver of info...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2017162594
更新日期:2017-11-01 00:00:00
abstract::A method of image analysis was developed for correlation of hemangiomas detected at computed tomography (CT) and/or magnetic resonance (MR) imaging with increased blood pool activity evident at single photon emission CT (SPECT) performed after labeling of red blood cells with technetium-99m. Image analysis was perform...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.181.2.1924790
更新日期:1991-11-01 00:00:00
abstract::Fifty-six cases of spondylolysis were encountered in 1500 lumbar spine reports reviewed. The frequency of detecting isthmus defects on anteroposterior (AP), lateral, 45-degree right and left oblique, 30-degree up-angled AP, and collimated lateral views was determined. The collimated lateral view showed the largest num...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.153.3.6494460
更新日期:1984-12-01 00:00:00
abstract::Institutional review board approval and informed consent were obtained. This study was conducted to evaluate a newly developed technique for discriminative color coding of tagged stool during three-dimensional (3D) endoluminal fly-through computed tomographic (CT) colonography and to determine its effect on reading ef...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2483071645
更新日期:2008-09-01 00:00:00
abstract:PURPOSE:To compare findings with color Doppler sonography and magnetic resonance (MR) angiography in the diagnosis of Budd-Chiari syndrome. MATERIALS AND METHODS:Doppler sonographic scans and MR angiograms in 11 patients (five men and six women; age range, 30-63 years; mean age, 45 years) with proved Budd-Chiari syndr...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.195.1.7892450
更新日期:1995-04-01 00:00:00
abstract:PURPOSE:To use coronary computed tomographic (CT) angiography to compare the prevalence, extent, and composition of coronary atherosclerotic lesions in African American and white patients with acute chest pain. MATERIALS AND METHODS:The institutional review board waived the requirement for informed consent for this re...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.11110158
更新日期:2011-08-01 00:00:00
abstract:PURPOSE:To assess the repeatability in human volunteers of software-quantified small bowel motility captured with magnetic resonance (MR) imaging and to test the ability to detect changes in motility induced by pharmacologic agents. MATERIALS AND METHODS:The study was approved by the Royal Free Research Ethics Committ...
journal_title:Radiology
pub_type: 杂志文章,随机对照试验
doi:10.1148/radiol.13130151
更新日期:2013-11-01 00:00:00
abstract::Fifty-eight patients with focal mass lesions involving the gastrointestinal tract were studied retrospectively. The diagnostic value of CT scans was seen by assessing the barium studies alone, then by combined review of radiographs and CT scans. Patient management decision making was similarly evaluated. CT scanning a...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.158.3.3753800
更新日期:1986-03-01 00:00:00
abstract::Tissue culture techniques were used to study the effect of hyperthermia on several cell types, including normal liver and hepatoma cells, as well as cell lines that have been established in culture for many years. Short exposures (less than 30 min.) at 45 degrees C readily kill a large proportion of cells. The respons...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/117.2.447
更新日期:1975-11-01 00:00:00
abstract::Since two müllerian defects, the septate and bicornuate uteri, are no longer repaired by means of the same operative approach, an accurate preoperative diagnosis of these anomalies is now critical. A septum can be removed by means of hysteroscopic metroplasty. However, repair of a bicornuate uterus still requires abdo...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.172.3.2528160
更新日期:1989-09-01 00:00:00
abstract::Magnetic resonance (MR) images of the neck were obtained in 24 patients using a specially designed radio-frequency coil, standard and high-resolution imaging techniques, and a variety of spin echo and inversion recovery pulse sequences. Cervical vascular structures were more easily identified with MR than with CT beca...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.150.2.6691100
更新日期:1984-02-01 00:00:00
abstract::Many physico-anatomic variables and instrument parameters influence the relative magnetic resonance signal intensity of vascular channels. The interaction of these mechanisms is complex, but their composite effects can be accounted for by two main categories of flow phenomena: time-of-flight effects and spin-phase cha...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.161.3.3786730
更新日期:1986-12-01 00:00:00
abstract::An angiographic system capable of simultaneous biplane stereoscopic magnification cerebral angiography was evaluated. Stereoscopic imaging improved the morphologic depiction of aneurysms and of arteriovenous malformations. In a series of 357 patients, procedure time was reduced because the initial biplane stereoscopic...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.165.2.3659390
更新日期:1987-11-01 00:00:00
abstract::The value of magnetic resonance (MR) imaging was assessed for 17 pregnant patients with sonograms suggestive of a pelvic mass. The MR imaging signal features improved lesion characterization in 47% (eight of 17) of cases, including two of four mature cystic teratomas of the ovary, three uterine fibroids, one solid ova...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.176.3.2389030
更新日期:1990-09-01 00:00:00