Abstract:
:Recent methods of magnetic resonance imaging involve the placement of a grid of planes of saturation over the imaging plane; distortion of the grid corresponds to tissue displacement in two dimensions. An extension to this method that allows measurement of motion in the third dimension involves a second acquisition that tilts the grid, allowing analysis of motion normal to the imaging plane. A rotating phantom was used to verify the accuracy of the motion measurements, and the technique was applied to the heart wall and skeletal muscle. Phantom results show that the measure of z motion can be as accurate as that of x and y motion. Three-dimensional displacements of heart-wall and skeletal muscle are shown. With an accurate measure of three-dimensional motion, more complete analysis of heart-wall motion and contraction is possible.
journal_name
Radiologyjournal_title
Radiologyauthors
Pipe JG,Boes JL,Chenevert TLdoi
10.1148/radiology.181.2.1924810subject
Has Abstractpub_date
1991-11-01 00:00:00pages
591-5issue
2eissn
0033-8419issn
1527-1315journal_volume
181pub_type
杂志文章相关文献
RADIOLOGY文献大全abstract::Seventy "low-suspicion," nonpalpable solid breast nodules were evaluated with stereotaxic fine-needle aspiration with cytologic analysis as an alternative to follow-up mammography. Sonography was performed in all cases to determine the solid nature of the nodules. Eight cysts were incorrectly classified with sonograph...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.183.3.1584910
更新日期:1992-06-01 00:00:00
abstract::Single and multiple dose-time fractionation schemes were investigated in patients with mycosis fungoides and lymphoma cutis. The single dose response shows that the disease-free interval is dose dependent. Remission rates are similar when the same total dose is given in either single treatments or multiple daily fract...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/119.2.439
更新日期:1976-05-01 00:00:00
abstract::The National Electrical Manufacturers Association (NEMA) has established a new standard for x-ray tube focal-spot measurements using a focal-spot camera with a slit instead of a pinhole. Measurements from the slit focal-spot camera are compared and star resolution pattern techniques for 50 focal spots. In addition, me...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.165.1.3628780
更新日期:1987-10-01 00:00:00
abstract::Diffusion magnetic resonance (MR) imaging is evolving into a potent tool in the examination of the central nervous system. Although it is often used for the detection of acute ischemia, evaluation of directionality in a diffusion measurement can be useful in white matter, which demonstrates strong diffusion anisotropy...
journal_title:Radiology
pub_type: 杂志文章,评审
doi:10.1148/radiol.2452060445
更新日期:2007-11-01 00:00:00
abstract:PURPOSE:To determine the prevalence of clinically serious findings unrelated to stroke on cranial magnetic resonance (MR) images in a population of community-dwelling elderly people. MATERIALS AND METHODS:Neuroradiologists reviewed MR images of 3,672 people aged 65 years and older who were enrolled in a longitudinal, ...
journal_title:Radiology
pub_type: 杂志文章,多中心研究
doi:10.1148/radiology.202.1.8988190
更新日期:1997-01-01 00:00:00
abstract::To determine the impact of radiographic findings on the interpretation of bone and gallium scans of patients with active osteomyelitis, the authors reviewed the medical records and radiologic examinations of 104 patients. The only diagnostic finding of active disease on radiographs was the presence of a sequestrum (th...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.165.3.3685360
更新日期:1987-12-01 00:00:00
abstract:PURPOSE:To determine the impact of prospective electrocardiographic (ECG) triggering on image quality and diagnostic outcome of thin-section computed tomography (CT) of the lung. MATERIALS AND METHODS:Forty-five consecutive patients referred for thin-section CT of the lung were examined with prospectively ECG-triggere...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2292021114
更新日期:2003-11-01 00:00:00
abstract::Background During the peak of the coronavirus disease 2019 (COVID-19) pandemic, the authors noted an increase in positive lower-extremity CT angiography examinations in patients who presented with leg ischemia. The goal of this study was to determine whether lower-extremity arterial thrombosis was associated with COVI...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2020202348
更新日期:2020-11-01 00:00:00
abstract:PURPOSE:To retrospectively compare fusion fluorine 18 fluorodeoxyglucose (FDG) positron emission tomographic (PET)/computed tomographic (CT) imaging with CT imaging alone in the evaluation of yttrium 90 ((90)Y)-ibritumomab tiuxetan radioimmunotherapy treatment of B-cell non-Hodgkin lymphoma. MATERIALS AND METHODS:This...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2463060588
更新日期:2008-03-01 00:00:00
abstract:PURPOSE:To evaluate the relative benefits and cost-effectiveness of treating iliac arterial occlusive disease with various interventions. MATERIALS AND METHODS:Cost-effectiveness was analyzed in a hypothetical cohort of patients with intermittent claudication caused by an iliac arterial stenosis. Primary stent placeme...
journal_title:Radiology
pub_type: 杂志文章,meta分析
doi:10.1148/radiology.208.3.9722840
更新日期:1998-09-01 00:00:00
abstract:PURPOSE:To determine the natural history of intracranial calcifications in infants with treated congenital toxoplasmosis. MATERIALS AND METHODS:Between January 1982 and March 1994, cranial computed tomography was performed in 56 infants with treated congenital toxoplasmosis when they were newborns and approximately 1 ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.199.2.8668790
更新日期:1996-05-01 00:00:00
abstract:PURPOSE:To determine the feasibility and accuracy of a protocol for calculating whole-organ renal perfusion (renal blood flow [RBF]) and regional perfusion on the basis of biphasic computed tomography (CT), with concurrent dynamic contrast material-enhanced (DCE) CT perfusion serving as the reference standard. MATERIA...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2015142757
更新日期:2016-04-01 00:00:00
abstract::Persistent pain and decreased range of motion are disabling complications of wrist trauma. Between 1978 and 1986, in ten patients with persistent pain following trauma, arthrography depicted changes characteristic of adhesive capsulitis. Adhesive capsulitis has been described in the shoulder, hip, and ankle, but littl...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.167.1.3347720
更新日期:1988-04-01 00:00:00
abstract::Perfusion computed tomography (CT) is a relatively new technique that allows rapid qualitative and quantitative evaluation of cerebral perfusion by generating maps of cerebral blood flow (CBF), cerebral blood volume (CBV), and mean transit time (MTT). The technique is based on the central volume principle (CBF = CBV/M...
journal_title:Radiology
pub_type: 杂志文章,评审
doi:10.1148/radiol.2313021488
更新日期:2004-06-01 00:00:00
abstract:PURPOSE:To determine the most accurate imaging modality for detection of silicone implant ruptures. MATERIALS AND METHODS:Forty single-lumen silicone implants were surgically placed in 20 rabbits. Each rabbit received one intact and one ruptured implant and was examined with mammography, magnetic resonance (MR) imagin...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.190.1.8259410
更新日期:1994-01-01 00:00:00
abstract::Ten patients suspected of having cervical carcinoma underwent magnetic resonance (MR) imaging before and after opacification of the vagina with a mixture of barium, water, and maltodextrin/calcium lactate. Use of vaginal contrast medium resulted in improved visualization of the vaginal wall, lumen, and fornices in all...
journal_title:Radiology
pub_type: 临床试验,杂志文章
doi:10.1148/radiology.213.2.r99oc23608
更新日期:1999-11-01 00:00:00
abstract:PURPOSE:To establish an imaging approach to visualize the 100-microm-thick hippocampal neuron-generating dentate granule cell layer (DGCL) consistently within a clinically feasible magnetic resonance (MR) imaging duration and to assess its sensitivity by quantifying the likelihood that it will be detected in healthy yo...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.09090897
更新日期:2010-03-01 00:00:00
abstract::A variation in ossification of the acromial process of the scapula is described. Postmortem radiographs, obtained in 78 infants who died of sudden infant death syndrome, showed an ossific opacity adjacent to the acromial process in 10 infants (13%). This finding was noted bilaterally in six patients and unilaterally i...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.180.1.2052690
更新日期:1991-07-01 00:00:00
abstract:PURPOSE:To establish whether early use of magnetic resonance (MR) imaging or computed tomography (CT) influences treatment and outcome of patients with low back pain (LBP) and whether it is cost-effective. MATERIALS AND METHODS:In a multicenter randomized study, two imaging policies for LBP were compared in 782 partic...
journal_title:Radiology
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1148/radiol.2312030886
更新日期:2004-05-01 00:00:00
abstract::Forty-nine patients with deep venous thrombosis (DVT) of the lower limb were studied with repeated duplex ultrasound (US) for at least 1 year or until the vein became normal at US. Standard anticoagulant therapy was given for 3 months. In 36 patients, the veins became normal within 1 year. The likelihood of normalizat...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.179.1.2006290
更新日期:1991-04-01 00:00:00
abstract:PURPOSE:To test previously defined ultrasound (US) criteria for identification of partial-thickness tears of the rotator cuff. MATERIALS AND METHODS:Before shoulder arthroscopy, 52 patients with shoulder pain for more than 3 months were examined with a 7.5-MHz commercially available linear-array transducer and a stand...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.197.2.7480690
更新日期:1995-11-01 00:00:00
abstract:PURPOSE:To quantify cephalocaudal gradient of lung inflation in acute lung injury in a dog model in prone versus supine position. MATERIALS AND METHODS:Experiments were performed in accordance with Guide for the Care and Use of Laboratory Animals, as approved by National Research Council (National Institutes of Health...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2341030992
更新日期:2005-01-01 00:00:00
abstract::366 patients with squamous-cell carcinoma of the oropharynx treated by external irradiation were studied to see whether residual disease at the end of treatment influences control. The frequency of recurrence was found to be significantly greater when residual disease was present. When the total dose was determined by...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/124.2.493
更新日期:1977-08-01 00:00:00
abstract::Endoleaks were detected with helical computed tomographic (CT) angiography in five patients after placement of an aortobiliac stent-graft. The leaks were subsequently evaluated with duplex ultrasonography (US) and, in four patients, with conventional aortography as well. CT angiography revealed a total of seven endole...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2253011806
更新日期:2002-12-01 00:00:00
abstract:PURPOSE:To compare observer performance by using soft-copy images produced by an amorphous silicon flat-panel-detector system and a storage-phosphor system for the detection of simulated chest lesions. MATERIALS AND METHODS:To test the diagnostic performance of these two systems, four types of simulated lesions (nodul...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2241011441
更新日期:2002-07-01 00:00:00
abstract:PURPOSE:To quantify inter- and intrascanner conformity in computed tomographic (CT) densitometry of the lungs. MATERIALS AND METHODS:With six scanners from four manufacturers, a lung densitometry protocol with several variations was applied for performance comparison. Phantoms included water, air, and a humanoid thora...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.197.3.7480750
更新日期:1995-12-01 00:00:00
abstract:PURPOSE:To test an optimized functional magnetic resonance (MR) imaging procedure to depict the motor hand representation area (HRA) in patients with epilepsy lesions near the central sulcus. MATERIALS AND METHODS:Fast low-angle shot MR imaging was performed with an oblique single-section imaging technique in eight co...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.210.2.r99ja31529
更新日期:1999-02-01 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 radiation dose to radiologists who perform computed tomographic (CT) fluoroscopic interventional procedures by using a quick-check method and a low-milliampere technique. MATERIALS AND METHODS:Two hundred twenty CT fluoroscopy--guided interventional procedures were performed in 189 patients. P...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.220.1.r01jl29161
更新日期:2001-07-01 00:00:00
abstract:PURPOSE:To evaluate the effectiveness of magnetic resonance (MR) imaging for assessment of the present and extent of tumor recurrence as determined with pathologic and surgical findings. MATERIALS AND METHODS:MR findings were retrospectively examined in 37 patients with a history of cervical carcinoma. Inter- and intr...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.194.1.7997540
更新日期:1995-01-01 00:00:00