PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 9169108

Computer integrated radiology system: analogue goes digital.

H Sandmayr·D Wallentin
View original source ↗Export metadata ↓

Abstract

At the end of 1995, a pilot project of a year and a half was successfully completed. The project had two main objectives. On the one hand, the aim was to have a performant analogue X-ray system replaced by a digital system. On the other, modalities of various manufacturers had to be integrated and evaluation had to be done on-screen. Within the scope of QA, this paper deals with a comparative study on the hard- and soft copy evaluation of 90 selected intensive thorax radiographs. A further element in our study was the adjusted work-flow of radiological technical assistants as well as a comparison of dose measurements in conventional and digital systems.

Explore related subjects

ArtifactsAustriaComputersCritical CareHumansQuality Assurance, Health CareRadiation DosageRadiographic Image EnhancementRadiographic Image Interpretation, Computer-AssistedRadiology Information SystemsJournal Article

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

H Sandmayr, D Wallentin. 1997. Computer integrated radiology system: analogue goes digital.. https://pubmed.ncbi.nlm.nih.gov/9169108/

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

KEEP EXPLORING

Related citations

PubMed2026

Striping artifact removal in VisiumHD data through nuclear counts modeling.

MOTIVATION: 10x Genomics VisiumHD enables spatial transcriptomics at 2 µm × 2 µm resolution but exhibits slide-specific, non-periodic striping artifacts due to lane-width variability. These multiplicative row/column effects distort bin total counts and can bias downstream analyses. The state-of-the-art destriping approach is the normalization procedure used as a preprocessing step in bin2cell; it applies sequential high-quantile row- then column-wise normalization, which is asymmetric and can introduce edge effects/macro-stripes and distortions of large-scale total-count structure. RESULTS: We propose a statistical destriping approach that leverages nuclei segmentation from the co-registered H&E image. Assuming transcript abundance is constant within each nucleus, we model bin counts with a negative binomial distribution whose mean is a product of a nucleus-specific concentration and row- and column-specific stripe-factors reflecting lane-width variation. We fit all parameters in a generalized linear modeling framework with cross-validated regularization on stripe-factors and iterative dispersion estimation, and use the fitted parameters to correct the observed counts into a destriped image. On synthetic data with known ground truth, our method improves stripe-factor estimation accuracy and reduces error in corrected counts relative to bin2cell and bin2cell-derived baselines. Across four public VisiumHD slides, it consistently lowers striping intensity while substantially better preserving biological signal present in the large-scale global count structure and avoiding the artifacts introduced by other methods. AVAILABILITY AND IMPLEMENTATION: All source code and links to publicly available data used for this study are available at https://github.com/paolamalsot/destriping-GLM.

Artifacts↗
PubMed2008

Impairment of echocardiographic acoustic window caused by breast implants.

Cosmetic breast implants are increasing in popularity. The presence of a breast implant overlying the anterior mediastinal space as a cause of impairment of the echocardiographic acoustic window has not been described previously. Here, we report three cases with significant impairment of echocardiographic acoustic window caused by breast implants. Clinicians should be aware of this interference and women should be informed of this dilemma before considering this cosmetic surgery.

Artifacts↗