Abstract:
PURPOSE:To test a neural network in differentiation of benign from malignant solitary pulmonary nodules. MATERIALS AND METHODS:Neural networks were trained and tested on the characteristics of 318 nodules. Predictive accuracy of the network was judged for calibration and discrimination. Network results were compared with those with a simpler Bayesian method. RESULTS:The Brier score was 0.142 (calibration, 0.003; discrimination, 0.139) for the neural network and 0.133 for the Bayesian analysis (calibration, 0.012; discrimination, 0.121). Analysis of the calibration curve revealed no significant difference (P < .05) between the slope (b = 1.09) and the line of identity (b = 1) for the neural network or the Bayesian analysis. The area under the receiver operating characteristic curve was 0.871 for the neural network and 0.894 for the Bayesian analysis (P < .05). There were 23 and 21 false-positive predictions and 18 and six false-negative predictions for the neural network and Bayesian analysis, respectively. CONCLUSION:The Bayesian method was better than the neural network in prediction of probability of malignancy in solitary pulmonary nodules.
journal_name
Radiologyjournal_title
Radiologyauthors
Gurney JW,Swensen SJdoi
10.1148/radiology.196.3.7644650subject
Has Abstractpub_date
1995-09-01 00:00:00pages
823-9issue
3eissn
0033-8419issn
1527-1315journal_volume
196pub_type
杂志文章相关文献
RADIOLOGY文献大全abstract::Dilatation of the aortic root, outlined by a periaortic fat layer, was observed in 19 of 25 successive cases of aneurysm of the ascending aorta. In one of these cases the aneurysm was entirely confined to the aortic root. In two other cases the aneurysms could not be detected on standard chest radiographs judged in th...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.138.3.7465830
更新日期:1981-03-01 00:00:00
abstract::One hundred twenty-six patients with the diagnosis of lymphoma underwent staging with both lymphangiography and computed tomography (CT) of the abdomen and pelvis. These patients were retrospectively studied to determine the optimal imaging modality for follow-up. Six hundred seventy-four CT scans were correlated with...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.164.3.3615860
更新日期:1987-09-01 00:00:00
abstract::A 7-year-old girl with histologically proved fibromuscular dysplasia underwent renal autotransplantation with prompt return of the blood pressure to normal. Two months later, immediately after tonsillectomy, severe hypertension recurred with marked narrowing of the previously patent anastomosis. After 4 weeks on antih...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/120.1.149
更新日期:1976-07-01 00:00:00
abstract::The technique and observations in 28 patients who underwent imaging of the percutaneous cholecystostomy (PC) tract are described. Imaging of the tracts was performed by injecting contrast material through an end-hole dilator during catheter removal (n = 13) or through an end-hole dilator with a side adapter over a thi...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.181.3.1947080
更新日期:1991-12-01 00:00:00
abstract::The feasibility of using focused ultrasound for studying structures as small as biliary ducts and correlative radiological and ultrasonic studies of the common and larger hepatic ducts are presented. Patients whose bile ducts were visualized on intravenous or T-tube cholangiography or oral cholecystography underwent r...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/118.1.155
更新日期:1976-01-01 00:00:00
abstract::Four patients with proved osteopetrosis (three with the infantile malignant form and one with the benign form) were examined with magnetic resonance imaging at 1.5 T. All patients were studied in the coronal and sagittal planes using both short and long repetition time/echo time sequences. The infantile malignant form...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.161.1.3763870
更新日期:1986-10-01 00:00:00
abstract:PURPOSE:To determine if percutaneously applied radio frequency (RF) combined with percutaneous ethanol instillation (PEI) can increase the extent of ablation in rat breast tumors. MATERIALS AND METHODS:R3230 mammary adenocarcinoma was implanted bilaterally in the mammary fat pads of 18 female rats. The tumor nodules m...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.217.3.r00dc27827
更新日期:2000-12-01 00:00:00
abstract::Fluoroscopically guided percutaneous needle aspiration of focal pulmonary lesions was performed in 108 presumed infectious episodes in 82 immunocompromised patients in whom prior diagnostic studies, including transtracheal aspiration, were negative to inconclusive. Two-thirds of the lesions were 4 cm or smaller. Singl...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/132.3.563
更新日期:1979-09-01 00:00:00
abstract:PURPOSE:To determine the diagnostic performance of magnetic resonance (MR) elastography in comparison to spleen length and dynamic contrast material-enhanced (DCE) MR imaging in association with esophageal varices in patients with liver cirrhosis by using endoscopy as the reference standard. MATERIALS AND METHODS:This...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.14130916
更新日期:2014-07-01 00:00:00
abstract:PURPOSE:To determine if patients with multiple fluid collections need every collection aspirated and if cross-contamination is a risk if separate sterile procedures are not followed for each aspiration. MATERIALS AND METHODS:Records from 1,076 imaging-guided percutaneous aspirations and drainages over 39 months were r...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.212.3.r99se25669
更新日期:1999-09-01 00:00:00
abstract::Magnetic resonance (MR) imaging was performed in 17 patients, 11-84 years of age, referred for evaluation of possible osteomyelitis involving the appendicular skeleton. MR imaging permitted successful identification of osteomyelitis in ten patients (four acute, two subacute with Brodie abscess, two chronic, and two ac...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.166.1.3336680
更新日期:1988-01-01 00:00:00
abstract::The authors reviewed 55 failed total condylar knee replacements, correlating the radiographic and surgical findings at removal or revision. Failure was due to infection in 20 cases, mechanical loosening in 18, instability without loosening in 10, malalignment without loosening in 4, a supracondylar fracture in 2, and ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.152.2.6739790
更新日期:1984-08-01 00:00:00
abstract::Three patients presented with meningitis associated with congenital defects of the inner ear, consisting of a cyst-like cochlea and a short, wide horizontal semicircular canal. The findings were easily identified on routine skull radiographs, alleviating the need for further studies and leading to treatment of the def...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.135.2.7367630
更新日期:1980-05-01 00:00:00
abstract::In ten rabbit ears the central auricular artery was percutaneously catheterized and subjected to doses of laser energy transmitted through a flexible optical fiber within the artery. Arterial occlusion was not produced in the initial three ears using energy levels less than 600 mW. Higher levels of laser energy, in th...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.142.3.7199750
更新日期:1982-03-01 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::Lung scintigrams and pulmonary angiograms of 111 patients with suspected pulmonary embolism who had matching perfusion defects and radiographic abnormalities (infiltrate, atelectasis, or effusion) were reviewed. In 14 patients perfusion defects were substantially smaller than the corresponding radiographic opacity; on...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/133.1.189
更新日期:1979-10-01 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 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 fr...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.13121811
更新日期:2013-11-01 00:00:00
abstract::Prospective data were collected on complications associated with intraarterial digital subtraction angiography in 2,475 consecutive patients at a 650-bed Melbourne teaching hospital. Carotid or cerebral studies were performed in 939 patients, and the prevalence of stroke (ie, permanent neurologic deficit) was 0.3%. Th...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.182.1.1727290
更新日期:1992-01-01 00:00:00
abstract::Olfactory neuroblastoma is often misdiagnosed pathologically. The authors reviewed eight such cases in which the pathological findings met strict criteria. These neoplasms are locally invasive in the nose and paranasal sinuses, with frequent intraorbital and intracranial extension as well as distant metastases. A rare...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.137.2.7433670
更新日期:1980-11-01 00:00:00
abstract::To analyze the effectiveness and accuracy of the diagnostic process from screening mammography to final diagnosis at pathologic examination, the authors conducted a prospective study of 277 consecutive patients who underwent 291 mammographically directed biopsies of nonpalpable lesions. Of the 170 lesions that demonst...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.179.1.2006260
更新日期:1991-04-01 00:00:00
abstract::Background Management of abdominal branches associated with Stanford type B aortic dissection is controversial without definite criteria for therapy after thoracic endovascular aortic repair (TEVAR). This is in part due to lack of data on natural history related to branch vessels and their relationship with the dissec...
journal_title:Radiology
pub_type: 杂志文章,多中心研究
doi:10.1148/radiol.2019190598
更新日期:2020-02-01 00:00:00
abstract:PURPOSE:To investigate whether smoking has an effect on recurrent lumen narrowing after percutaneous transluminal angioplasty (PTA) or stent placement in lower-limb arteries. MATERIALS AND METHODS:A total of 650 patients (median age, 70 years; 389 men) with peripheral artery disease who underwent iliac artery PTA (n =...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2313031088
更新日期:2004-06-01 00:00:00
abstract::The preangiographic diagnosis of cerebral dural arteriovenous fistula (DAVF) can be difficult. The magnetic resonance (MR) images of 12 patients with angiographically proved DAVF were evaluated to characterize the appearance of these lesions and to identify those patients at increased risk for complications. Patients ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.175.1.2315480
更新日期:1990-04-01 00:00:00
abstract::A new type of endovascular prosthesis was inserted in 28 animals and evaluated for several factors, including thrombogenicity, tendency to migrate, critical implant zones, and incorporation into the vascular wall. The new prosthesis is a woven, multifilament structure of stainless steel alloy; its inherent elastic, se...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.164.3.3303120
更新日期:1987-09-01 00:00:00
abstract:PURPOSE:To evaluate multi- and single-detector row computed tomographic (CT) depiction of anatomic landmarks of temporal bone. MATERIALS AND METHODS:Institutional review board approval and written informed consent were obtained. In 50 temporal bones, transverse and coronal single-detector row CT images were compared w...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2351020895
更新日期:2005-04-01 00:00:00
abstract::Many physico-anatomic variables and instrument parameters influence the relative magnetic resonance signal intensity of vascular channels. The interaction of these mechanisms is complex, but their composite effects can be accounted for by two main categories of flow phenomena: time-of-flight effects and spin-phase cha...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.161.3.3786730
更新日期:1986-12-01 00:00:00
abstract:PURPOSE:To test the hypothesis that whole-body metabolic tumor burden (MTBWB) on postsurgical fluorodeoxyglucose (FDG) positron emission tomographic (PET)/computed tomographic (CT) images in patients with non-small cell lung cancer (NSCLC) is associated with their overall survival (OS). MATERIALS AND METHODS:The insti...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.14141398
更新日期:2015-06-01 00:00:00
abstract:PURPOSE:To compare the usefulness of computed tomography (CT) and gadolinium-enhanced magnetic resonance (MR) imaging in the detection of neoplastic invasion of laryngeal cartilage. MATERIALS AND METHODS:In a prospective study, 53 patients with carcinoma of the larynx or piriform sinus underwent CT and MR imaging befo...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.194.3.7862960
更新日期:1995-03-01 00:00:00
abstract::Diatrizoate (76%) contrast agent heated to 100 degrees C was injected into the veins of dogs and one human volunteer for the nonsurgical occlusion of the vessels. Follow-up venograms and histologic examinations, at intervals varying from one day to four weeks later, revealed thrombosis of the injected veins in all ani...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.145.2.7134430
更新日期:1982-11-01 00:00:00