Abstract:
:Gated radionuclide imaging with 99mTc-labeled red blood cells was employed to assess changes in right atrial (RA) volume in 17 subjects. Studies were repeated within two hours in five of 12 normal subjects and at two and ten days after infarction in five patients. Time-activity curves were generated for the RA and right ventricle (RV) from variable regions of interest defined by automatic edge detection. The RA time-activity curve exhibited four phases: filling, early emptying, equilibration, and late emptying. Repeated measurements of RA early emptying rates correlated closely in normals (r = 0.93). Early RA emptying and RV filling rates corresponded closely (r = 0.89). In four patients with infarction, the RA emptying rate was slowed on the first study but had normalized by 10 days. In a patient with inferior infarction and suspected RV infarction, the RA emptying rate was depressed and remained so for 10 days. Thus, relative changes in right atrial volume can be assessed reproducibly by a radionuclide technique, which is relatively independent of geometric assumptions. This technique offers great promise as a method to assess atrial function in health and disease.
journal_name
Radiologyjournal_title
Radiologyauthors
Marmor A,Biello DR,Sampathkumaran KS,Geltman EM,Siegel BA,Roberts Rdoi
10.1148/radiology.139.3.7232740subject
Has Abstractpub_date
1981-06-01 00:00:00pages
719-23issue
3eissn
0033-8419issn
1527-1315journal_volume
139pub_type
杂志文章相关文献
RADIOLOGY文献大全abstract::In some patients with right-lower-lobe collapse a triangular shadow was seen in the right upper lung field, continuous with the mediastinum and with its apex pointing toward the right hilus. This represents a shift of the upper anterior mediastinum to the right and may be mistaken for right-upper-lobe collapse or an i...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/116.2.305
更新日期:1975-08-01 00:00:00
abstract:PURPOSE:To measure mean cerebral blood flow (CBF) in ischemic and nonischemic territories and in low-attenuation regions in patients with acute stroke by using deconvolution-derived hemodynamic imaging. MATERIALS AND METHODS:Twelve patients with acute middle cerebral artery stroke and 12 control patients were examined...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2221010471
更新日期:2002-01-01 00:00:00
abstract::Purpose To report the results of dual-time-point gallium 68 (68Ga) prostate-specific membrane antigen (PSMA)-11 positron emission tomography (PET)/magnetic resonance (MR) imaging prior to prostatectomy in patients with intermediate- or high-risk cancer. Materials and Methods Thirty-three men who underwent conventional...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2018172232
更新日期:2018-08-01 00:00:00
abstract:PURPOSE:To investigate the utility of a free-breathing ultrashort echo time (UTE) sequence for the evaluation of small pulmonary nodules in oncology patients by using a hybrid positron emission tomography (PET)/magnetic resonance (MR) imaging system and to compare the nodule detection rate between UTE and a conventiona...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2015150489
更新日期:2016-01-01 00:00:00
abstract:PURPOSE:To study tissue platinum concentrations and the correlation between tissue and plasma platinum concentrations after negative-balance isolated pelvic perfusion (NIPP) in a porcine model. MATERIALS AND METHODS:All animal experiments were conducted according to the University Guidelines for Animal Care and Experi...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.11102453
更新日期:2012-02-01 00:00:00
abstract:PURPOSE:To evaluate possible radiation dose reduction in the extremities with use of digital radiography and a needle-structured image plate (NIP) by comparing this technique with digital radiography performed with a powder-structured image plate (PIP) and a flat-panel detector (FPD). MATERIALS AND METHODS:This study ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2493080640
更新日期:2009-01-01 00:00:00
abstract::Twelve primary fourth ventricle tumors and 22 medulloblastomas occupying mainly the fourth ventricle were analyzed, with emphasis on the differential diagnosis, vascularity, and some unusual findings. Though both types of tumor often have identical manifestations, the correct diagnosis can be made in most cases by car...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/128.2.393
更新日期:1978-08-01 00:00:00
abstract::One hundred and forty-seven patients with clinical stage I nonseminomatous germ cell tumors of the testis were entered into a follow-up program after orchidectomy. Follow-up consisted of regular clinical examinations, estimations of the serum markers beta human chorionic gonadotropin and alpha-fetoprotein, chest radio...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.164.3.2441430
更新日期:1987-09-01 00:00:00
abstract::During the past century, imaging of the pregnant patient has been performed with radiography, scintigraphy, computed tomography, magnetic resonance imaging, and ultrasonography (US). US imaging has emerged as the primary imaging modality, because it provides real-time images at relatively low cost without the use of i...
journal_title:Radiology
pub_type: 历史文章,杂志文章,评审
doi:10.1148/radiol.14140238
更新日期:2014-11-01 00:00:00
abstract::The lateral C1-2 puncture approach for myelography is a modification of the technique for percutaneous radiofrequency cervical cordotomy. Positioning of the needle in the posterior, rather than anterior, one third of the canal avoids injury to anomalous vertebral artery branches which lie in the anterior half of the n...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/132.3.760
更新日期:1979-09-01 00:00:00
abstract:PURPOSE:To quantify white matter (WM) and gray matter (GM) damage in patients who presented with clinically isolated syndrome (CIS), which is suggestive of multiple sclerosis (MS), by combining volume-based morphometry (VBM) and tract-based spatial statistics (TBSS). MATERIALS AND METHODS:This prospective HIPAA-compli...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2541090817
更新日期:2010-01-01 00:00:00
abstract::The authors conducted a multivariate analysis of the prognostic factors in 96 patients with early glottic cancer treated by radiation therapy. Of these, 73 had T1 and 23 had T2 tumor. The primary tumor was controlled in 82% of T1 and 74% of T2 lesions. Actuarial five-year survival rates were 87% for T1 and 74% for T2....
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.149.1.6611940
更新日期:1983-10-01 00:00:00
abstract::In 3,600 patients evaluated with technetium-99m sulfur colloid for metastatic liver disease, 40 had equivocal scans due to a solitary defect in the interior margin of the right lobe. In these patients, the authors differentiated the gallbladder fossa from a metastatic focus using one of two new hepatobiliary agents: t...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.136.2.7403530
更新日期:1980-08-01 00:00:00
abstract::Medical therapy is standard for intrahepatic amebic abscess and generally is effective. However, we have encountered a group of patients in whom percutaneous aspiration and drainage was indicated due to uncertainty of diagnosis or clinical deterioration of the patient. Twenty such patients underwent percutaneous drain...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.156.3.4023220
更新日期:1985-09-01 00:00:00
abstract:PURPOSE:To evaluate the positive predictive values (PPVs) of Breast Imaging and Reporting Data Systems (BI-RADS) assessment categories for breast magnetic resonance (MR) imaging and to identify the BI-RADS MR imaging lesion features most predictive of cancer. MATERIALS AND METHODS:This institutional review board-appro...
journal_title:Radiology
pub_type: 杂志文章,多中心研究
doi:10.1148/radiol.12110619
更新日期:2012-07-01 00:00:00
abstract::Blunt trauma to the abdomen is the main cause of pancreatic injury in childhood. One of the most common causes of injury is child abuse. Pancreatitis, pancreatic pseudocyst, and loculated peripancreatic effusion are sequellae of this trauma. The diagnosis of these lesions is aided by ultrasound. Pancreatic injury in c...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.135.1.6153810
更新日期:1980-04-01 00:00:00
abstract::Background Traumatic brachial plexus injuries affect 1% of patients involved in major trauma. MRI is the best test for traumatic brachial plexus injuries, although its ability to differentiate root avulsions (which require urgent reconstructive surgery) from other types of nerve injury remains unknown. Purpose To eval...
journal_title:Radiology
pub_type: 杂志文章,meta分析
doi:10.1148/radiol.2019190218
更新日期:2019-10-01 00:00:00
abstract::Purpose To investigate whether whole-liver enhancing tumor burden [ETB] can serve as an imaging biomarker and help predict survival better than World Health Organization (WHO), Response Evaluation Criteria in Solid Tumors (RECIST), modified RECIST (mRECIST), and European Association for the Study of the Liver (EASL) m...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2016160838
更新日期:2017-06-01 00:00:00
abstract:PURPOSE:To use directed biopsy sampling to determine whether microvascular assessment within gliomas, by means of ultrahigh-field-strength high-spatial-resolution gradient-echo (GRE) magnetic resonance (MR) imaging at 8 T, correlates with histopathologic assessment of microvascularity. MATERIALS AND METHODS:The study ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.12110799
更新日期:2012-07-01 00:00:00
abstract:PURPOSE:To review the ultrasonographic (US), computed tomographic (CT), and magnetic resonance (MR) imaging findings in 13 patients with telangiectatic focal nodular hyperplasia (FNH) and to compare imaging features with histopathologic results from resected specimens. MATERIALS AND METHODS:US, helical multiphasic CT,...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2282020040
更新日期:2003-08-01 00:00:00
abstract::The authors suggest that ultrasound be used in the evaluation of juxtadiaphragmatic lesions before resorting to other radiographic methods. This technique gives accurate diagnoses, serves as a guide for further studies, and might obviate more extensive procedures. ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/125.3.785
更新日期:1977-12-01 00:00:00
abstract::The use of computed tomography (CT) in 28 patients with surgically proved prolactinomas is described. The authors' experience suggests that in evaluating patients with galactorrhea-amenorrhea syndrome, CT in combination with pluridirectional tomography usually provides sufficient information to make further invasive s...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/131.1.117
更新日期:1979-04-01 00:00:00
abstract::Radiographic findings in 11 proved cases of cytomegalovirus (CMV) colitis were reviewed and correlated with colonoscopic and pathologic findings. Patients were chronically ill homosexual men with multiple systemic opportunistic infections. Endoscopies showed focal or diffuse inflammation, hemorrhagic plaques, and supe...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.155.3.2988010
更新日期:1985-06-01 00:00:00
abstract::Gallbladder disease, and the patients with symptoms suggestive of gallbladder disease, remains a widespread clinical problem that requires investigation by imaging techniques. Sonography, and to a lesser extent cholescintigraphy, has facilitated the evaluation of these patients and allows the diagnosis of cholelithias...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.163.3.3554340
更新日期:1987-06-01 00:00:00
abstract:PURPOSE:To evaluate the prognostic value of volumetric computed tomography (CT) for therapy control in patients treated with repeated transarterial chemoembolization (TACE) for hepatocellular carcinoma (HCC). MATERIALS AND METHODS:Eighty-five patients with histologically proved HCC underwent 182 TACE procedures with 5...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.214.2.r00fe06349
更新日期:2000-02-01 00:00:00
abstract:PURPOSE:To assess the clinical and radiographic findings of pulmonary infections diagnosed by using invasive means. MATERIALS AND METHODS:Fifty-nine episodes of pulmonary infection were diagnosed in 52 (7.2%) of a consecutive series of 725 adult bone marrow transplant recipients. Causative organisms, time of diagnoses...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.210.3.r99mr39699
更新日期:1999-03-01 00:00:00
abstract:PURPOSE:Fast-neutron irradiation and boron-neutron capture therapy (BNCT) have been independently investigated as treatments for malignant disease. This study tested the feasibility of enhancing fast-neutron irradiation with concomitant BNCT. MATERIALS AND METHODS:Seventeen male Fisher rats, each weighing 180-200 g an...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.191.3.8184080
更新日期:1994-06-01 00:00:00
abstract::Pedal lymphography was performed without the use of vital dyes in 510 patients. Lymphatic vessels were still readily identifiable by this method, due to their transparency, clarity, elasticity, distensibility, and characteristic branching pattern. Procedure time was shortened by 10-15 minutes without compromising the ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/133.3.795
更新日期:1979-12-01 00:00:00
abstract:PURPOSE:To determine if a central axonal injury underlies neuropsychiatric symptoms after mild traumatic brain injury (mTBI) by using tract-based spatial statistics analysis of diffusion-tensor images. MATERIALS AND METHODS:The institutional review board approved this study, with waiver of informed consent. Diffusion-...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2015142974
更新日期:2015-12-01 00:00:00
abstract::Purpose To evaluate the normal biodistribution and kinetics of (S)-4-(3-[18F]fluoropropyl)-l-glutamic acid ((18)F FSPG) in healthy volunteers and to compare (18)F FSPG mean and maximum standardized uptake values (SUVmean and SUVmax, respectively) with those of (18)F fluorodeoxyglucose (FDG) across a variety of organs....
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2015142000
更新日期:2016-06-01 00:00:00