PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 9232396

Digital mammography using storage phosphor plate technique--optimizing image processing parameters for the visibility of lesions and anatomy.

S Kheddache·H Kvist
View original source ↗Export metadata ↓

Abstract

Digital mammograms from a storage phosphor plate system for general radiography were compared to conventional mammograms by means of visual grading analysis (VGA). For the digital images, image processing parameters were optimized and evaluated through observer preference analysis (OPA). The results of the VGA showed significantly better gradings for the conventional mammograms for parenchyma, linear structures, and cysts, and significantly better gradings for the digital mammograms for the skin surface. For calcifications, no significant difference was seen. For the OPA, contrast enhanced mammograms graded significantly best. Using standard image processing, the digital mammograms were considered as adequate for diagnosis in 49% of the cases, as uncertain in 20%, and as inadequate in 31%. However, the observers differed considerably in their gradings both in the VGA and in the OPA.

Explore related subjects

CalcinosisDiagnostic ImagingEvaluation Studies as TopicFemaleFibrocystic Breast DiseaseHumansImage Processing, Computer-AssistedMammographyClinical TrialComparative StudyJournal ArticleResearch Support, Non-U.S. Gov't

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

S Kheddache, H Kvist. 1997. Digital mammography using storage phosphor plate technique--optimizing image processing parameters for the visibility of lesions and anatomy.. https://doi.org/10.1016/s0720-048x(97)01040-1

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed1999

[Intrahepatic calcification--a differential diagnostic problem].

HISTORY AND CLINICAL FINDINGS: A 57-year-old woman was admitted for investigation of intrahepatic calcifications. Intrahepatic cholangiolithiasis was suspected. In 1993 she underwent cholecystectomy because of lithiasis. The examination with endoscopic retrograde cholangiography (ERC) was planned. INVESTIGATIONS: The laboratory findings were normal except for a mild elevation of alkaline phosphatase and gammaglutamyl transpeptidase. The sonographic examination of the abdomen showed multiple hyperechoic calcifications along non-dilated bile ducts. In the spleen of normal size there were found a lot of intraparenchymatous calcifications. The abdominal roentgenography revealed calcifications also in the pancreas. In ERC, the intra- and extrahepatic bile ducts were normal with simultaneous proof of parenchymatous calcifications. TREATMENT AND COURSE: Because of the medical history of the patient and the radiologic findings the multiple parenchymatous calcifications could be referred to a miliary tuberculosis during childhood. In miliary tuberculosis, the liver almost always is involved by acute granulomatous inflammation. The therapy of hepatic tuberculosis follows the guidelines of systemic tuberculostatic therapy according to other presentations of this disease. Under sufficient therapy, tuberculotic granulomas normally heal without cicatrization. Sometimes tissue reactions in form of local fibrosis and calcification lead to a mild reduction in hepatic function as seen in this case. CONCLUSION: In the European population, intrahepatic cholangiolithiasis is a rare cause of focal hyperechoic liver lesions. In differential diagnosis, numerous diseases of possible systemic course have to be considered, which may induce calcifications of the liver or other organs. Among systemic diseases characterized by granulomatous inflammation and possible calcification tuberculosis and sarcoidosis have to be mentioned first.

Calcinosis↗