Abstract:
PURPOSE:To retrospectively determine the sensitivity of kinetic features measured with computer-aided evaluation at breast magnetic resonance (MR) imaging in discriminating benign from malignant lesions, with histopathologic findings used as the reference standard. MATERIALS AND METHODS:Institutional review board approval was obtained for this HIPAA-compliant study. Informed consent was waived. Suspicious breast lesions visible only at MR imaging and in which biopsy had been performed with MR imaging guidance were retrospectively evaluated with a computer-aided evaluation program. Computer-generated kinetic features for each lesion were recorded, and those of benign and malignant lesions were compared. Features analyzed included the presence or absence of computer-aided evaluation "threshold enhancement" at 50% and 100% minimum thresholds; degree of initial peak enhancement; and enhancement profiles composed of lesion percentages of washout, plateau, and persistent enhancement. The Fisher exact test and Student t test were used to assess differences in these analyses. RESULTS:One hundred fifty-four consecutive lesions (41 malignant, 113 benign) in 125 women (age range, 27-86 years; mean age, 52 years) were evaluated. The presence of threshold enhancement at computer-aided evaluation was sensitive for malignancy, with 38 of 41 (93%) malignant lesions demonstrating enhancement at both the 50% and 100% thresholds. Absence of threshold enhancement at computer-aided evaluation helped improve the discrimination between benign and malignant lesions when compared with that at initial interpretation by the radiologists. False-positive rates were reduced by 8.8% at the 50% enhancement threshold (not significant) and by 23.0% at the 100% enhancement threshold (P=.02) when compared with that at initial interpretation. Analyses of initial peak enhancement values and enhancement profiles did not demonstrate further improvements in lesion discrimination. CONCLUSION:The use of computer-aided evaluation for breast MR imaging significantly helped improve the discrimination of benign from malignant lesions when compared with that at initial interpretations by radiologists.
journal_name
Radiologyjournal_title
Radiologyauthors
Williams TC,DeMartini WB,Partridge SC,Peacock S,Lehman CDdoi
10.1148/radiol.2441060634subject
Has Abstractpub_date
2007-07-01 00:00:00pages
94-103issue
1eissn
0033-8419issn
1527-1315pii
2441060634journal_volume
244pub_type
杂志文章相关文献
RADIOLOGY文献大全abstract:PURPOSE:To describe the placement of a nasolacrimal polyurethane stent with a new introducer set and hook. MATERIALS AND METHODS:The authors designed a soft polyurethane stent, an introducer that does not require balloon dilation, and a hook that can remove a ball-tipped guide wire from the inferior nasal meatus under...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.194.1.7997560
更新日期:1995-01-01 00:00:00
abstract::Background Screening breast MRI is recommended for women with BRCA mutation or a history of chest radiation, but guidelines are equivocal for MRI screening of women with a personal history of breast cancer or high-risk lesion. Purpose To evaluate screening breast MRI performance across women with different elevated br...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2019181136
更新日期:2019-07-01 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 determine the feasibility of creating a clinically relevant hepatic ablation (ie, an ablation zone capable of treating a 2-cm liver tumor) by using robotically assisted sonic therapy (RAST), a noninvasive and nonthermal focused ultrasound therapy based on histotripsy. Materials and Methods This study was ap...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2018171544
更新日期:2018-05-01 00:00:00
abstract:PURPOSE:To evaluate characteristics of delayed ischemic stroke after stent-assisted coil placement in cerebral aneurysms and to determine the optimal duration of dual antiplatelet therapy for its prevention. MATERIALS AND METHODS:This retrospective study was approved by the institutional review board, and the requirem...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.14140070
更新日期:2014-10-01 00:00:00
abstract::Alterations in gastric physiology caused by selective embolization and vasopressin infusion of the left gastric artery were evaluated in 29 dogs. Gastric acidity was not significantly altered following Gelfoam embolization but decreased sharply with vasopressin infusion. These results suggest that the segmental occlus...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/120.3.533
更新日期:1976-09-01 00:00:00
abstract::Twenty-nine patients with known or suspected malignancy were studied with identical T1-weighted (spin echo [SE] and inversion recovery [IR]) and T2-weighted SE magnetic resonance (MR) imaging at 0.5 and 1.5 T to evaluate the relative sensitivities of these sequences for detecting focal hepatic lesions. At 0.5 T, 98 le...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.174.1.2152980
更新日期:1990-01-01 00:00:00
abstract::When fast, nondynamic scanning techniques are used in combination with adequate intravenous injection of contrast material, good-quality images of the pulmonary artery (PA) can be obtained with routine computed tomography (CT). The purpose of this study was to evaluate PA filling defects detected on these CT scans. Tw...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.188.3.8351360
更新日期:1993-09-01 00:00:00
abstract::The chest films in 30 proved cases of Pneumocystis carinii pneumonia were reviewed to determine the incidence of atypical radiographic findings. Seventeen of 30 patients or 56% presented at least one atypical radiographic finding during the course of the disease. Unilateral distribution, lobar involvement, abscess for...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/114.1.39
更新日期:1975-01-01 00:00:00
abstract::Twenty-nine subjects with occupational asbestos exposure and clinical asbestosis were examined with high-resolution computed tomography (HRCT) to determine its sensitivity, relative to that of conventional computed tomography (CT), for detection of benign asbestos-related disease. Thin-section HRCT scans were obtained...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.166.3.3340770
更新日期:1988-03-01 00:00:00
abstract::The American College of Radiology (ACR) convened a "think tank" of experts on aspects of molecular imaging. The purposes of the colloquium were to develop scenarios about how molecular imaging would develop in the future and to make recommendations to the ACR about how to prepare radiologists for this important set of...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2222011530
更新日期:2002-01-01 00:00:00
abstract:PURPOSE:To prospectively evaluate the accuracy of using physical examination to identify puncture-related groin pseudoaneurysms, as assessed by using duplex ultrasonography (US), after percutaneous transluminal procedures and to prospectively evaluate the association between preinterventional platelet count, antiplatel...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2402050907
更新日期:2006-08-01 00:00:00
abstract:PURPOSE:To prospectively evaluate the efficacy of additional radiofrequency (RF) ablation by comparing the results of one and two sessions. MATERIALS AND METHODS:All patients gave written informed consent to participate in this institutional review board-approved prospective study. From September 2007 to February 2008...
journal_title:Radiology
pub_type: 杂志文章,随机对照试验
doi:10.1148/radiol.12111300
更新日期:2012-06-01 00:00:00
abstract:PURPOSE:To evaluate the efficacy of susceptibility-weighted (SW) magnetic resonance (MR) imaging for the assessment of the posttreatment change in oxygen saturation in the draining vein in patients with spinal arteriovenous malformation (AVM). MATERIALS AND METHODS:The study protocol was approved by the institutional ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.09090286
更新日期:2010-03-01 00:00:00
abstract::Magnetic resonance (MR) imaging-related artifacts associated with five different aneurysm clips made of five different metals (commercially pure titanium, titanium alloy, Phynox, Elgiloy, and cobalt alloy) were evaluated. Aneurysm clips made of commercially pure titanium and titanium alloy produced the smallest artifa...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.209.2.9807590
更新日期:1998-11-01 00:00:00
abstract:PURPOSE:To determine the clinical feasibility of a contrast material--enhanced two-dimensional (2D) magnetic resonance (MR) angiographic sequence in lower extremity arteries. MATERIALS AND METHODS:Four healthy volunteers and 12 patients underwent dynamic contrast-enhanced MR angiography; all patients also underwent co...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.196.3.7644630
更新日期:1995-09-01 00:00:00
abstract:PURPOSE:To determine whether vascular, ischemic, and inflammatory causes of bowel wall thickening in children can be differentiated at gray-scale and color Doppler ultrasonography (US). MATERIALS AND METHODS:Thirty-seven children with acute bowel disease underwent graded compression US. Findings of bowel wall thicknes...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.203.3.9169680
更新日期:1997-06-01 00:00:00
abstract::The safety and long-term effectiveness of fluoroscopically guided balloon dilation for corrosive esophageal stricture was evaluated in 22 patients with a follow-up period of more than 1 year (range, 13-52 months). The average interval between corrosive agent ingestion and initial balloon dilation was 18 years (range, ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.184.2.1620830
更新日期:1992-08-01 00:00:00
abstract:PURPOSE:To assess combined static-dynamic magnetic resonance (MR) urography in the evaluation of congenital urinary tract dilatation in infants and children. MATERIALS AND METHODS:Sixty-two patients with urinary tract dilatation underwent prospective examination with combined static-dynamic MR urography. A combination...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2243011207
更新日期:2002-09-01 00:00:00
abstract:PURPOSE:A prospective study was performed to compare results of computed tomography (CT) and fiberoptic bronchoscopy in diagnosis of cancer in patients with hemoptysis. MATERIALS AND METHODS:Ninety-one patients (64 men, 27 women) with hemoptysis underwent thin-section CT and fiberoptic bronchoscopy. RESULTS:CT scans ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.189.3.8234690
更新日期:1993-12-01 00:00:00
abstract::A transhepatic computed-tomographic-guided biopsy of a right adrenal mass is described. This method is simpler to perform than the usual posterior biopsy carried out with the patient prone and is less likely to cause a complicating pneumothorax. In seven of eight patients with right adrenal masses, adrenal tissue was ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.148.2.6867360
更新日期:1983-08-01 00:00:00
abstract:PURPOSE:To evaluate the feasibility of magnetic resonance (MR) perfusion imaging in the human lung to help detect perfusion defects distal to suspected pulmonary embolism. MATERIALS AND METHODS:Seven patients suspected of having pulmonary embolism first underwent ventilation-perfusion lung scintigraphy followed by MR ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.203.1.9122390
更新日期:1997-04-01 00:00:00
abstract::Monooctanoin, a cholesterol solvent, was infused into the biliary system of 11 patients. Twenty-eight (74%) of 38 total stones responded to monooctanoin: 16 (42%) decreased in size, and 12 (32%) dissolved completely. Ten stones (26%) did not change in size. We attribute this to inadequate drug-stone contact, which was...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.153.2.6484170
更新日期:1984-11-01 00:00:00
abstract:PURPOSE:To evaluate the magnetic resonance (MR) imaging features of the developing femur in fetal pig specimens. MATERIALS AND METHODS:MR images of 15 fetal pig femurs, which were categorized into three groups of specimens representing each third of the gestational period, were used to compare increasing femoral lengt...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2332030131
更新日期:2004-11-01 00:00:00
abstract:PURPOSE:To investigate the effect of a meal on splanchnic circulation in patients with cirrhosis of the liver. MATERIALS AND METHODS:Ten adult patients with cirrhosis and 10 adult control subjects (mean age, 54 years) underwent duplex ultrasonography. Flow volumes of the portal vein, superior mesenteric artery, spleni...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.201.3.8939220
更新日期:1996-12-01 00:00:00
abstract:PURPOSE:To retrospectively compare the diagnostic yield and complications associated with the use of short versus long needle paths for computed tomography (CT)-guided biopsy of small subpleural lung lesions. MATERIALS AND METHODS:The study was approved by the institutional review board, and the requirement for inform...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2342031423
更新日期:2005-02-01 00:00:00
abstract:PURPOSE:To analyze the effect of a decrease in computed tomographic (CT) colonographic voltage, from 100 and 120 kVp to 80 kVp and reconstructed with filtered back projection ( FBP filtered back projection ), on radiation dose, image noise, and diagnostic performance in anthropomorphic phantoms and to assess the effect...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.14140192
更新日期:2014-12-01 00:00:00
abstract::Squamous cell carcinoma is aggressive, destroying surrounding bony margins. The radiographic finding of an expansile mass is rarely if ever caused solely by squamous cell carcinoma, and it should prompt the radiologist to question either the pathological diagnosis or the coexistence of a mucocele. Surgery prior to rad...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.136.1.7384530
更新日期:1980-07-01 00:00:00
abstract:PURPOSE:To compare imaging findings between laproscopic and open partial nephrectomy at 6 months after surgery and to follow the evolution of the findings over time. MATERIALS AND METHODS:This HIPAA-compliant retrospective study had institutional review board approval and consent was waived. A surgical database was cr...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.10091256
更新日期:2010-05-01 00:00:00
abstract::Various whole-body, multiple-field, electron-beam therapy techniques are analyzed. Accelerator characteristics, various dosimetric techniques, and experimental setup are described. A flattening filter was constructed which produced an uncollimated electron-beam profile (4 MeV) with a uniformity of +/- 8% across a 200-...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/122.1.219
更新日期:1977-01-01 00:00:00