Abstract:
PURPOSE:To test the reproducibility of markings on mammography films set by a commercial computer aided detection (CAD) system. PATIENTS AND METHODS:One hundred unilateral mammography examinations (each in CC and MLO) of 100 patients with mammographically detected suspicious foci, which were histopathologically proven to be malignant, were scanned three times with the CAD system, retrospectively. Every fifth patient of the institutional tumor case sampler was enrolled in the study. Only cases with one visible lesion were included in the study. Reproducibility and sensitivity (in both the strict and the broader sense) were determined. Strict sensitivity means the correct set of markers in both images, whereas broader sensitivity means the correct set in at least one of the images. Sixteen of 100 malignancies were indicated by focal suspicious microcalcification clusters, 53 tumors by masses and 31 cases by both signs of breast cancer. The CAD evaluation was divided into only two different markers: one for microcalcifications and one for masses. Thus, 47 (16+31) tumor-induced microcalcifications and 84 (53+31) malignancy-related masses were checked using the CAD system. RESULTS:Eighteen of 100 unilateral mammography examinations revealed identical patterns in all three scans (18% reproducibility). Eleven of 47 suspicious focal microcalcification clusters and 43/84 masses were correctly marked on both mammographic views in all three CAD scans (strict and broader sensitivity, 23.4 and 51.1%, respectively). Six of 47 microcalcification clusters and 8/84 masses were totally missed in all images by the system (false negative rate, 12.8 and 9.6%, respectively). CONCLUSION:Reproducibility is essential for CAD systems. Currently, reproducibility of the used CAD system appears to be insufficient for clinical routine. Improvement of the system characteristics would make such systems valuable as a 'second reader' in clinical examination.
journal_name
Eur J Radioljournal_title
European journal of radiologyauthors
Malich A,Azhari T,Böhm T,Fleck M,Kaiser WAdoi
10.1016/s0720-048x(00)00189-3keywords:
subject
Has Abstractpub_date
2000-12-01 00:00:00pages
170-4issue
3eissn
0720-048Xissn
1872-7727pii
S0720048X00001893journal_volume
36pub_type
杂志文章abstract:PURPOSE:Our study was aimed to assess the diagnostic value of MR cholangiopancreatography (MRCP) and MR imaging at 3 T device when evaluating biliary adverse events after liver transplantation. MATERIALS AND METHODS:A series of 384 MR examinations in 232 liver transplant subjects with suspected biliary complications (...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2018.07.009
更新日期:2018-09-01 00:00:00
abstract:BACKGROUND:Colorectal cancer will present itself as a bowel obstruction in 16-23% of all cases. However, not all obstructing tumors are malignant and the differentiation between a benign and a malignant tumor can be difficult. The purpose of our study was to determine whether fast dynamic gadolinium-enhanced MR imaging...
journal_title:European journal of radiology
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更新日期:2010-06-01 00:00:00
abstract:BACKGROUND:Parenchymal enhancement and fibroglandular tissue on breast MRI in women with high genetic risk: are changes before and after risk-reducing salpingo-oophorectomy associated with breast cancer risk? OBJECTIVE:To evaluate changes in the level of background parenchymal enhancement (BPE) and amount of fibroglan...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2018.10.030
更新日期:2018-12-01 00:00:00
abstract:OBJECTIVES:To prospectively evaluate the clinical value of real-time ultrasonography (US)-computed tomography (CT)/magnetic resonance imaging (MRI) fusion imaging for percutaneous needle biopsy of focal liver lesions (FLLs), and to compare its biopsy success rate with that of conventional US-guided biopsy in a propensi...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2018.04.002
更新日期:2018-06-01 00:00:00
abstract:OBJECTIVE:To assess the usefulness of the spectral curve slope of dual-energy CT (DECT) for differentiating between hepatocellular carcinoma (HCC), hepatic metastasis, hemangioma (HH) and cysts. METHODS:In total, 121 patients were imaged in the portal venous phase using dual-energy mode. Of these patients, 23 patients...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2014.07.009
更新日期:2014-10-01 00:00:00
abstract::The image quality in mammography was evaluated for all the 56 equipment-image receptor combinations used in Finland with two phantoms containing test objects of three types and different sizes. We obtained 2-8 fold variations for the smallest sizes of the three objects (specks, fibres and masses) visible in the X-ray ...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:
更新日期:1987-08-01 00:00:00
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journal_title:European journal of radiology
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更新日期:2011-12-01 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章
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更新日期:2013-04-01 00:00:00
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更新日期:2011-01-01 00:00:00
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journal_title:European journal of radiology
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journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2010.12.007
更新日期:2012-01-01 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2010.09.039
更新日期:2011-12-01 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2015.10.012
更新日期:2016-01-01 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/0720-048x(93)90077-z
更新日期:1993-04-01 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章,随机对照试验
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更新日期:2007-02-01 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章
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更新日期:2020-10-01 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/s0720-048x(01)00447-8
更新日期:2002-07-01 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章
doi:
更新日期:1985-05-01 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章
doi:
更新日期:1986-02-01 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.ejrad.2006.05.022
更新日期:2006-10-01 00:00:00
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journal_title:European journal of radiology
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更新日期:2010-11-01 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章
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更新日期:2004-10-01 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章
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更新日期:2004-07-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/j.ejrad.2021.109530
更新日期:2021-01-09 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章,评审
doi:10.1016/j.ejrad.2004.03.022
更新日期:2004-06-01 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章,评审
doi:
更新日期:1989-02-01 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2014.12.019
更新日期:2015-04-01 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章
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更新日期:2011-06-01 00:00:00
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journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2009.03.030
更新日期:2010-06-01 00:00:00