Abstract:
PURPOSE:To evaluate the performance of a low-b-value diffusion-weighted (DW) echo-planar (EP) imaging sequence for detection of regional and diffuse myocardial edema in patients with acute myocarditis. MATERIALS AND METHODS:This study was approved by the institutional review board, and informed consent was obtained from all subjects. Thirteen patients with acute myocarditis and a control group of seven healthy adults underwent low-b-value (50 sec/mm(2)) DW cardiac magnetic resonance imaging. DW EP images were acquired in the four-chamber long-axis section and analyzed qualitatively and quantitatively. Short inversion time inversion-recovery (STIR) T2-weighted and late gadolinium chelate enhancement images were acquired in the same plane and analyzed. Late gadolinium chelate enhancement was used as the reference standard. Statistical analyses were performed with a receiver operating characteristic analysis and a nonparametric Wilcoxon test. RESULTS:Qualitative analysis showed myocardial high-signal-intensity areas in 100% (13 of 13) of patients on DW EP, 38% (five of 13) on STIR T2-weighted, and 100% (13 of 13) on late gadolinium chelate enhancement images. In eight patients (61%), high-signal-intensity areas were exhibited on DW EP images that were not detected on STIR T2-weighted images, but were colocalized with lesions detected on late gadolinium chelate enhancement images. Similar results were obtained by using an automatic analysis with dedicated cardiac software. The global myocardial signal intensity ratio was significantly higher (P = .03) in patients than in controls for DW EP (2.2 ± 0.4 [standard deviation] vs 1.1 ± 0.4, respectively), and exhibited no significant difference (P = .14) for STIR T2-weighted (1.7 ± 0.6 vs 1.4 ± 0.1, respectively) images. Sensitivity and diagnostic accuracy were higher for DW EP images than for STIR T2-weighted images (92% vs 54%, and 95% vs 70%, respectively), and specificity was the same (100% vs 100%). CONCLUSION:A low-b-value DW EP imaging sequence is a feasible alternative to the standard STIR T2-weighted sequence for detection of regional and global myocardium edema in patients with acute myocarditis. SUPPLEMENTAL MATERIAL:http://radiology.rsna.org/lookup/suppl/doi:10.1148/radiol.13121811/-/DC1.
journal_name
Radiologyjournal_title
Radiologyauthors
Potet J,Rahmouni A,Mayer J,Vignaud A,Lim P,Luciani A,Dubois-Randé JL,Kobeiter H,Deux JFdoi
10.1148/radiol.13121811subject
Has Abstractpub_date
2013-11-01 00:00:00pages
362-9issue
2eissn
0033-8419issn
1527-1315pii
radiol.13121811journal_volume
269pub_type
杂志文章相关文献
RADIOLOGY文献大全abstract::A nuclear magnetic resonance (NMR) imager with a 6.5-cm aperture is described. Spatial resolution is 0.47 X 2.0 mm with a slice thickness of 8.4 mm. Contrast resolution is 3% for a 4-minute image. Because of the excellent spatial resolution and high contrast between soft tissues, the images provide a great deal of det...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.136.3.7403550
更新日期:1980-09-01 00:00:00
abstract:PURPOSE:To evaluate the diffusion-weighted (DW) imaging characteristics of nonmalignant lesion subtypes assessed as false-positive findings at conventional breast magnetic resonance (MR) imaging. MATERIALS AND METHODS:This HIPAA-compliant retrospective study had institutional review board approval, and the need for in...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.12112672
更新日期:2012-12-01 00:00:00
abstract::As computer networks become an integral part of the radiology practice, it is appropriate to raise concerns regarding their security. The purpose of this article is to present an overview of computer network security risks and preventive strategies as they pertain to the radiology enterprise. A number of technologies ...
journal_title:Radiology
pub_type: 杂志文章,评审
doi:10.1148/radiology.220.2.r01au32303
更新日期:2001-08-01 00:00:00
abstract:PURPOSE:To analyze the clinical outcomes of chemoembolization for solitary caudate lobe hepatocellular carcinoma (HCC) found at initial presentation. MATERIALS AND METHODS:This retrospective study was approved by the institutional review board; the requirement for informed patient consent was waived. From July 1998 to...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.10100105
更新日期:2010-10-01 00:00:00
abstract::The authors evaluated the effect on mammographic examinations of the use of synchrotron radiation to detect phase-perturbation effects, which are higher than absorption effects for soft tissue in the energy range of 15-25 keV. Detection of phase-perturbation effects was possible because of the high degree of coherence...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.215.1.r00ap10286
更新日期:2000-04-01 00:00:00
abstract:PURPOSE:To determine whether increased silver halide deposition accounts for some curvilinear areas of hyperlucency (halo signs) that surround breast masses on screen-film mammograms. MATERIALS AND METHODS:Breast images obtained in 43 women (aged 30-67 years; mean, 48.6 years) that showed a halo sign were selected fro...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.199.1.8633130
更新日期:1996-04-01 00:00:00
abstract::The T1 and T2 relaxation times of primary tumors of the musculoskeletal system were calculated in 54 patients. No correlation was found between the relaxation values and the histopathologic type of the tumors. Lipoma had the same relaxation characteristics as normal fat. Otherwise tumors could be differentiated from n...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.167.3.3363140
更新日期:1988-06-01 00:00:00
abstract::Digital radiographs obtained with a CT scanner were evaluated as an alternative to conventional pelvimetry. Dosimetry studies demonstrated an absorbed radiation dose of 22 mrad for each digital radiograph, approximately 3% of the dose for comparable standard radiographs. Distance measurements were accurately made on d...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.143.3.7079500
更新日期:1982-06-01 00:00:00
abstract:PURPOSE:To investigate the relationship of spinal osteophytes to vertebral bone mineral density (BMD) and to spinal fracture. MATERIALS AND METHODS:This relationship was investigated in 203 men. Integral BMD was measured with dual x-ray absorptiometry, and both cortical and trabecular BMD were measured with quantitati...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.189.2.8210380
更新日期:1993-11-01 00:00:00
abstract::Invasive coronary angiography (ICA) with measurement of fractional flow reserve (FFR) by means of a pressure wire technique is the established reference standard for the functional assessment of coronary artery disease (CAD) ( 1 , 2 ). Coronary computed tomographic (CT) angiography has emerged as a noninvasive method ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2017162641
更新日期:2017-10-01 00:00:00
abstract::Percutaneous angioplasty and placement of balloon-expandable intraluminal stents were performed in 12 iliac occlusions in 12 patients. Indications were limb salvage in seven and claudication in five. After successful stenting, ankle-brachial indexes improved by 0.15 or more in 11 of 12 patients (mean increase, 0.40), ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/172.3.953
更新日期:1989-09-01 00:00:00
abstract::Preliminary results indicate that film dosimetry is a simple and precise method of determining volume dose distributions. Calculated dose distributions using computers or estimations of surface dose using TLD dosimeters are within 5% of the measured dose. Initial attempts to find suitable alternate techniques tailored...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/120.3.725
更新日期:1976-09-01 00:00:00
abstract:PURPOSE:To describe and evaluate a method of tomosynthesis breast imaging with a full-field digital mammographic system. MATERIALS AND METHODS:In this tomosynthesis method, low-radiation-dose images were acquired as the x-ray source was moved in an arc above the stationary breast and digital detector. A step-and-expos...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.205.2.9356620
更新日期:1997-11-01 00:00:00
abstract:PURPOSE:To evaluate the frequency of the supraacetabular fossa (SAF) (pseudodefect of acetabular cartilage) at magnetic resonance (MR) arthrography of the hip and to compare the MR findings with those from arthroscopy. MATERIALS AND METHODS:All patients gave written permission for anonymized use of their medical data ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.12111397
更新日期:2012-05-01 00:00:00
abstract::Thirty-nine magnetic resonance (MR) studies were performed on 31 women with surgically proved endometriosis. A total of 88 endometriotic lesions ranging in size from 0.2 to 7.5 cm were detected on 24 of 30 MR images of women. The signal intensities ranged from hyperintense on all pulse sequences (41 of 88) to hypointe...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.171.3.2717740
更新日期:1989-06-01 00:00:00
abstract::Using a dose fractionation scheme patterned after the current regimen for treatment of disseminated non-Hodgkin lymphoma, the authors studied the effects of irradiation on progenitor and effector cells for hematopoiesis in five-month-old BC3F1 mice. Fractions of 20 or 50 rad (0.2 or 0.5 Gy) total body irradiation were...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.134.2.7352240
更新日期:1980-02-01 00:00:00
abstract:PURPOSE:To compare the new "warp" sequence (slice-encoding metal artifact correction [SEMAC], view-angle tilting [VAT], and increased bandwidth) for the reduction of both through-plane and in-plane magnetic resonance (MR) artifacts with current optimized MR sequences in patients with total hip arthroplasty (THA). MATE...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.12112408
更新日期:2012-10-01 00:00:00
abstract::History A 52-year-old man with a history of urinary tract infections and a previous clinical diagnosis of left inguinal hernia presented to the nephrologist with recent onset of dysuria and increasing swelling in the left inguinoscrotal region in the absence of fever or scrotal trauma. There was no relevant surgical o...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.16141805
更新日期:2016-06-01 00:00:00
abstract::Renal failure induced by intravenous iodinated contrast media is a frequent medical problem. While such cases are generally reported first by the clinician, the phenomenon can be seen even earlier by the radiologist. An abnormally persistent nephrogram is a sign of abnormal clearance, which in turn should alert the ph...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/131.2.553
更新日期:1979-05-01 00:00:00
abstract::Purpose To report the impact of changing from screen-film mammography to digital mammography (DM) in a large organized national screening program. Materials and Methods A retrospective analysis of prospectively collected annual screening data from 2009-2010 to 2015-2016 for the 80 facilities of the English National He...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2018181426
更新日期:2019-03-01 00:00:00
abstract::Cardiac arrest of 2-15 minutes was induced in 14 dogs. When circulatory arrest lasted longer than 5 minutes, abnormal cerebral angiographic findings were seen 3-4 hours after resuscitation, consisting of (a) marked prolongation of the arterial phase in both intracranial and extracranial arteries, and (b) faint (poor) ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/117.3.627
更新日期:1975-12-01 00:00:00
abstract::Gastric polyps were found in 38 patients in a series of 2,420 consecutive double-contrast studies of the upper gastrointestinal tract. The resulting incidence of 1.6% is four times the highest figure previously reported. Single polyps were usually located in the antrum, multiple polyps in the body of fundus. Two-third...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.134.1.7350630
更新日期:1980-01-01 00:00:00
abstract::A 6-year follow-up study of height and weight was conducted between 1975 and 1983 in a total of 149 sibling pairs of the same sex, one of whom had been exposed to diagnostic ultrasound in utero. The data were analyzed for the entire sample group, as well as for subgroups defined by sex, gestational age at delivery, bi...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.166.3.3277240
更新日期:1988-03-01 00:00:00
abstract::Thirty-seven patients with 18 primary advanced or persistent, 16 local recurrent, and three local metastatic tumors of the head and neck were treated with a combination of interstitial low-dose iridium-192 radiation therapy and interstitial 915-MHz microwave hyperthermia supplemented by external radiation therapy. Twe...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.176.1.2353100
更新日期:1990-07-01 00:00:00
abstract::Purpose To determine whether fructose 1,6-bisphosphatase 1 (FBP1) expression is associated with fluorine 18 (18F) fluorodeoxyglucose (FDG) accumulation in patients with hepatocellular carcinoma (HCC) and to investigate how FBP1 expression and 18F FDG uptake are related to tumor differentiation grade and metabolism and...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2017161607
更新日期:2017-09-01 00:00:00
abstract:PURPOSE:To use cardiovascular data from computerized tomographic (CT) pulmonary angiography for facilitating the identification of pulmonary hypertension (PH) in patients without acute pulmonary embolism. MATERIALS AND METHODS:The institutional human research committee approved this retrospective study; informed conse...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.15141269
更新日期:2015-10-01 00:00:00
abstract:PURPOSE:To present our experience with helical computed tomographic (CT) arteriography as the initial diagnostic examination in patients suspected to have focal arterial injuries of the proximal extremities. MATERIALS AND METHODS:During 19 months, 142 arterial segments in the proximal portions of the extremities of 13...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.218.1.r01ja13188
更新日期:2001-01-01 00:00:00
abstract::Differentiation of osteomyelitis from cellulitis or septic arthritis can be difficult. The radiological examination often does not have the characteristic features. Seventy of 71 children with osteomyelitis had focal areas of increased radioactivity at the site of the infection. The addition of "blood pool" images aid...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/117.2.331
更新日期:1975-11-01 00:00:00
abstract:PURPOSE:To prospectively investigate steady-state blood volume measurements for early quantitative monitoring of antiangiogenic treatment with ultrasmall superparamagnetic iron oxide (USPIO)-enhanced magnetic resonance (MR) imaging. MATERIALS AND METHODS:The institutional animal care committee approved all experiments...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2442060371
更新日期:2007-08-01 00:00:00
abstract::An overview of current air-contrast stomach examination techniques is offered: (a) Hampton's technique which does not use distension; (b) the Japanese method which utilizes the relaxant drug Buscopan, good distension, and much patient rotation; (c) a third method in which no drugs are used but more distension is obtai...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/117.3.743
更新日期:1975-12-01 00:00:00