Problems associated with the large file sizes of digital mammograms have impeded the integration of digital mammography with picture archiving and communications systems. Digital mammograms irreversibly compressed by the novel wavelet Access Over Network (AON) compression algorithm were compared with lossless-compressed digital mammograms in a blinded reader study to evaluate the perceived sufficiency of irreversibly compressed images for comparison with next-year mammograms. Fifteen radiologists compared the same 100 digital mammograms in three different comparison modes: lossless-compressed vs 20:1 irreversibly compressed images (mode 1), lossless-compressed vs 40:1 irreversibly compressed images (mode 2), and 20:1 irreversibly compressed images vs 40:1 irreversibly compressed images (mode 3). Compression levels were randomly assigned between monitors. For each mode, the less compressed of the two images was correctly identified no more frequently than would occur by chance if all images were identical in compression. Perceived sufficiency for comparison with next-year mammograms was achieved by 97.37% of the lossless-compressed images and 97.37% of the 20:1 irreversibly compressed images in mode 1, 97.67% of the lossless-compressed images and 97.67% of the 40:1 irreversibly compressed images in mode 2, and 99.33% of the 20:1 irreversibly compressed images and 99.19% of the 40:1 irreversibly compressed images in mode 3. In a random-effect analysis, the irreversibly compressed images were found to be noninferior to the lossless-compressed images. Digital mammograms irreversibly compressed by the wavelet AON compression algorithm were as frequently judged sufficient for comparison with next-year mammograms as lossless-compressed digital mammograms.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3025124 | PMC |
| http://dx.doi.org/10.1007/s10278-010-9277-6 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Implications of compressive loading of the stomach wall: Interplay between mechanical deformation and microstructure.
Acta Biomater
January 2025
Institute of Biomechanics, Graz University of Technology, Austria; Department of Structural Engineering, NTNU, Norway. Electronic address:
During gastric surgery, the stomach wall is compressed with clamps and sutures or staple lines. These short- and long-term deformations can severely compromise the integrity of the tissue and make it difficult for the stomach wall to respond and remodel to the new loading conditions. Consequently, serious intra- and postoperative complications such as the formation of leaks during bariatric surgeries, can be associated with these immense tissue deformations.
View Article and Find Full Text PDFMechanical and suture-holding properties of a UV-cured atelocollagen membrane with varied crosslinked architecture.
Biomed Mater
October 2024
School of Dentistry, St. James's University Hospital, University of Leeds, Leeds LS9 7TF, United Kingdom.
The mechanical competence and suturing ability of collagen-based membranes are paramount in guided bone regeneration (GBR) therapy, to ensure damage-free implantation, fixation and space maintenance. However, contact with the biological medium can induce swelling of collagen molecules, yielding risks of membrane sinking into the bone defect, early loss of barrier function, and irreversibly compromised clinical outcomes. To address these challenges, this study investigates the effect of the crosslinked network architecture on both mechanical and suture-holding properties of a new atelocollagen (AC) membrane.
View Article and Find Full Text PDFContralateral discectomy as a novel approach for disc herniation compressing a conjoined nerve root: illustrative case.
J Neurosurg Case Lessons
August 2024
Department of Neurosurgery, St. Luke Hospital, Thessaloniki, Greece.
Background: A conjoined nerve root is a rare condition with numerous variants. The diagnosis can be challenging, especially when the condition coexists with other pathologies. In cases where a disc herniation affects these nerve roots, any miscalculation or inexperience of the surgeon can irreversibly injure them.
View Article and Find Full Text PDFForeign substance injection for esthetic purposes associated with delayed unilateral sciatic nerve impairment: A surgical case report.
Clin Neurol Neurosurg
June 2024
Division of Plastic Surgery, Hospital de Clínicas, University of Buenos Aires School of Medicine, Buenos Aires, Argentina.
Attempts at body contour modifications have led to the use of different alloplastic materials that can irreversibly damage health and risk patients' lives. These modeling substances can induce a general autoimmune inflammatory response, producing a very heterogeneous clinical spectrum ranging from mild and severe systemic to local symptoms that sometimes affect peripheral nerves. We report a unique case of a tumor-like sciatic nerve impairment produced months after the injection of a modeling substance into the buttocks for esthetic purposes.
View Article and Find Full Text PDFObliteration of portal venules contributes to portal hypertension in biliary cirrhosis.
J Pathol
June 2024
School of Biomedical Engineering and Technology, Tianjin Medical University, Tianjin, PR China.
The effects of the obliteration of portal venules (OPV) in cirrhotic portal hypertension are poorly understood. To investigate its contribution to portal hypertension in biliary cirrhosis and its underlying mechanism, we evaluated OPV using two-dimensional (2D) histopathology in liver explants from patients with biliary atresia (BA, n = 63), primary biliary cholangitis (PBC, n = 18), and hepatitis B-related cirrhosis (Hep-B-cirrhosis, n = 35). Then, three-dimensional (3D) OPV was measured by X-ray phase-contrast CT in two parallel models in rats following bile duct ligation (BDL) or carbon tetrachloride (CCl) administration, representing biliary cirrhosis and post-necrotic cirrhosis, respectively.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!