Abstract:
PURPOSE:To assess the optimal timing for coronary magnetic resonance (MR) angiography in children with congenital heart disease by using dual cardiac phase whole-heart MR imaging. MATERIALS AND METHODS:The local institutional review board approved this study, and informed consent was obtained from parents or guardians. Thirty children (13 girls; overall mean age, 5.01 years) were examined with a 1.5-T MR system. A free-breathing three-dimensional steady-state free precession dual cardiac phase sequence was used to obtain MR angiographic data during end-systolic and middiastolic rest periods. Vessel length, diameter, and sharpness, as well as image quality of the coronary artery segments, were analyzed and compared by using Bland-Altman plots, linear regression analysis, the t test, and Wilcoxon signed rank tests. RESULTS:Optimal coronary artery imaging timing was patient dependent and different for each coronary artery segment (36 segments favored end systole, 28 favored middiastole). In 15 patients (50%), different segments favored different cardiac phases within the same patient. Image quality and vessel sharpness degraded with higher heart rates, with a similar correlation for end systole (right coronary artery [RCA], 0.39; left main [LM] coronary artery, 0.46; left anterior descending [LAD] artery, 0.51; and left circumflex [LCX] artery, 0.50) and middiastole (RCA, 0.34; LM, 0.45; LAD, 0.48; and LCx, 0.55). Mean image quality difference or mean vessel sharpness difference showed no indication to prefer a specific cardiac phase. CONCLUSION:The optimal cardiac rest period for coronary MR angiography in children with congenital heart disease is specific for each coronary artery segment. Dual cardiac phase whole-heart coronary MR angiography enables optimal coronary artery visualization by retrospectively choosing the optimal imaging rest period.
journal_name
Radiologyjournal_title
Radiologyauthors
Uribe S,Hussain T,Valverde I,Tejos C,Irarrazaval P,Fava M,Beerbaum P,Botnar RM,Razavi R,Schaeffter T,Greil GFdoi
10.1148/radiol.11101659subject
Has Abstractpub_date
2011-07-01 00:00:00pages
232-40issue
1eissn
0033-8419issn
1527-1315pii
radiol.11101659journal_volume
260pub_type
杂志文章相关文献
RADIOLOGY文献大全abstract:PURPOSE:To retrospectively review imaging characteristics of indeterminate computed tomographic (CT) pulmonary angiograms for pulmonary embolism (PE) and patient outcome. MATERIALS AND METHODS:Investigational review board approval was obtained, informed consent was waived, and the study was HIPAA compliant. Retrospect...
journal_title:Radiology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1148/radiol.2371041520
更新日期:2005-10-01 00:00:00
abstract::Twenty angiographic procedures involving the superior mesenteric artery (SMA) were performed with balloon occlusion catheters in dogs with chronic liver cirrhosis and portal hypertension. The following complications were found: (a) rapid balloon inflation during angiography due to a leak between the two catheter lumen...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.140.3.7280230
更新日期:1981-09-01 00:00:00
abstract:PURPOSE:To retrospectively correlate radiographic findings of osteoarthritis of the tibiofemoral joint with arthroscopic findings of articular cartilage degeneration within the tibiofemoral joint in patients with chronic knee pain. MATERIALS AND METHODS:The study was performed in compliance with HIPAA regulations. App...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2393050584
更新日期:2006-06-01 00:00:00
abstract::A case of achalasia complicated by Mycobacterium fortuitum pulmonary infection and empyema is reported. This association has been documented in the medical literature. Possible mechanisms explaining this association are discussed. ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.160.1.3715050
更新日期:1986-07-01 00:00:00
abstract::Respiratory and other regular motions during two-dimensional Fourier transform magnetic resonance imaging produce image artifacts consisting of local blurring and more or less regularly spaced "ghost" images propagating along the direction of the phase-encoding magnetic field gradient. The patterns of these ghost arti...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.160.3.3737920
更新日期:1986-09-01 00:00:00
abstract::Sixteen patients with biliary atresia and 11 patients with neonatal hepatitis were studied preoperatively with either Tc-99m-diethyl-IDA or TC-99m-diisopropyl-IDA. Two parameters were evaluated: hepatocyte clearance and time to appearance of radioactivity in the intestine. Two observers, using a visual grading system ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.146.2.6681570
更新日期:1983-02-01 00:00:00
abstract::Percutaneous transperitoneal fine-needle lymph-node biopsy was performed in 52 patients to establish a diagnosis of metastatic disease in nodal defects detected during lymphography. The procedure was found to be highly accurate, with few false-negatives and no false-positives. ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/131.3.647
更新日期:1979-06-01 00:00:00
abstract:PURPOSE:To study the frequency, timing, and associations of thoracic metastases in advanced (stage III and IV) high-grade serous ovarian cancer (HGSC) to help optimize the use of cross-sectional chest imaging. MATERIALS AND METHODS:This institutional review board-approved retrospective study with waived informed conse...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2015142467
更新日期:2015-12-01 00:00:00
abstract::This retrospective study of 144 patients was made to (a) assess the potential of magnetic resonance (MR) for demonstrating lymph nodes using spin-echo technique, (b) compare the MR results with those of CT, and (c) determine the optimal pulse-sequence interval (TR) and echo-delay time (TE) for imaging lymph nodes. The...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.153.3.6093190
更新日期:1984-12-01 00:00:00
abstract::Purpose To investigate whether nonhemodynamic resonant saturation effects can be detected in patients with focal epilepsy by using a phase-cycled stimulus-induced rotary saturation (PC-SIRS) approach with spin-lock (SL) preparation and whether they colocalize with the seizure onset zone and surface interictal epilepti...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2016150368
更新日期:2016-07-01 00:00:00
abstract:PURPOSE:To test three-dimensional (3D), navigator-echo magnetic resonance (MR) coronary angiography in detecting stenoses of the coronary arteries. MATERIALS AND METHODS:Forty-two patients (age range, 50-79 years) underwent MR coronary angiography (1.5 T). A navigator-echo sequence was used. Two or three 15% overlappe...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.214.3.r00mr01808
更新日期:2000-03-01 00:00:00
abstract::To investigate spatial resolution requirements for digitized portal images in radiation therapy, observer performance tests were performed. One hundred twenty portal images were digitized with sampling frequencies of 0.700, 0.350, and 0.175 mm for observation. Receiver operating characteristic analysis was used to det...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.183.2.1561370
更新日期:1992-05-01 00:00:00
abstract:PURPOSE:To characterize intracranial plaque inflammation in vivo by using three-dimensional (3D) high-spatial-resolution contrast material-enhanced black-blood (BB) magnetic resonance (MR) imaging and to investigate the relationship between intracranial plaque inflammation and cerebrovascular ischemic events. MATERIAL...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.13122812
更新日期:2014-05-01 00:00:00
abstract::Purpose To evaluate a CT structural analysis protocol (SAP) for estimating the strength of human female cadaveric spines with lytic lesions. Materials and Methods Osteolytic foci was created in the middle vertebra of 44 thoracic and lumbar three-level segments from 11 female cadavers (age range, 50-70 years). The segm...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2018171139
更新日期:2018-08-01 00:00:00
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::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:PURPOSE:To evaluate the usefulness of T2-weighted fast spin-echo magnetic resonance (MR) imaging with a 512 x 256 matrix for assessment of the preoperative stage of endometrial carcinoma. MATERIALS AND METHODS:Twenty-eight women with histopathologically proved endometrial carcinoma underwent preoperative T2-weighted f...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.206.2.9457210
更新日期:1998-02-01 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::Breast cancer screening detected 139 biopsy-proved malignancies in 16,000 slef-selected women (8.7/1,000). In these, xeroradiography detected 78% (109), clinical examination 55% (76), and thermography 39% (54). In all 16,000 women, the thermogram was interpreted as positive in 17.9% (2,864). The greatest effectiveness...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/122.1.123
更新日期:1977-01-01 00:00:00
abstract::Because of recent challenges in the literature regarding the validity of the older crown-rump length (CRL) data developed with conventional static-image ultrasound scanners, the authors evaluated the relationship between CRL and menstrual age of fetuses in a population of 416 patients with good menstrual dates. By usi...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.182.2.1732970
更新日期:1992-02-01 00:00:00
abstract:PURPOSE:To determine the transvaginal hysterosonographic appearances of benign and malignant endometrial disease. MATERIALS AND METHODS:From April 11, 1994, through August 1, 1996, a total of 88 women (age range, 25-81 years) underwent transvaginal hysterosonography and histopathologic evaluation of the endometrium af...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.210.2.r99fe37393
更新日期:1999-02-01 00:00:00
abstract::When a 30-minute infusion is chosen for intravenous cholangiography, the optimal dose in subjects with normal and decreased hepatic function seems to be 0.6 ml/kg iodipamide. Delayed visualization of the ducts and gallbladder occurs in hepatic dysfunction, therefore, radiographs should be taken up to eight hours after...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/114.3.519
更新日期:1975-03-01 00:00:00
abstract:PURPOSE:To assess white matter (WM) tract damage in patients with atypical Alzheimer disease (AD), including early-onset AD (EOAD), logopenic variant of primary progressive aphasia (lvPPA), and posterior cortical atrophy (PCA), by using diffusion-tensor magnetic resonance (MR) imaging and to identify similarities and d...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2015142766
更新日期:2015-10-01 00:00:00
abstract:PURPOSE:To assess the usefulness of intraarterial computed tomographic (CT) angiography in conjunction with digital subtraction angiography (DSA) by using a combined CT and angiographic unit in the preoperative evaluation of intracranial aneurysms. MATERIALS AND METHODS:Prospectively, 22 patients with or without subar...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.220.2.r01au20499
更新日期:2001-08-01 00:00:00
abstract:PURPOSE:To determine the feasibility of measuring choline and glycogen concentrations in normal human liver in vivo with proton (hydrogen 1 [1H]) magnetic resonance (MR) spectroscopy. MATERIALS AND METHODS:Signed consent to participate in an institutional review board-approved and HIPAA-compliant study was obtained fr...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.12112344
更新日期:2012-11-01 00:00:00
abstract:PURPOSE:To prospectively evaluate whether the characteristics of hepatic blood flow change during the early stages of fibrosis in patients with nonalcoholic fatty liver disease (NAFLD). MATERIALS AND METHODS:All participants provided written informed consent, and the study protocols were approved by the institutional ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.14132952
更新日期:2015-02-01 00:00:00
abstract::The authors retrospectively evaluated 12 patients with congenital (neonatal) neuroblastoma to assess the utility of newer imaging modalities. Findings at prenatal ultrasound (US), performed in four patients, were nonspecific (hydramnios and hydrops fetalis) in two and consistent with a suprarenal mass (one solid, one ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.175.2.2183280
更新日期:1990-05-01 00:00:00
abstract::Bowel perforation by ventriculo-peritoneal shunts occurred in two children with no abdominal symptoms. The diagnosis in each instance was confirmed by opacification of the colon in one child and the small bowel in the other via contrast medium injection of the distal shunt tubing. "Shuntograms" are recommended for all...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/121.3.701
更新日期:1976-12-01 00:00:00
abstract:PURPOSE:To prospectively compare brain magnetic resonance (MR) imaging and hydrogen 1 (1H) MR spectroscopy findings and to use functional MR imaging to explore the patterns of brain activation in men and women with Fabry disease (FD). MATERIALS AND METHODS:Eight men and eight women with FD (mean age, 38.8 years +/- 13...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2412051122
更新日期:2006-11-01 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