This volume (5116) of Springer's Lecture Notes in Computer Science contains the th proceedings of the 9 International Workshop on Digital Mammography (IWDM) which was held July 20 - 23, 2008 in Tucson, AZ in the USA. The IWDM meetings traditionally bring together a diverse set of researchers (physicists, mathematicians, computer scientists, engineers), clinicians (radiologists, surgeons) and representatives of industry, who are jointly committed to developing technologies to support clinicians in the early detection and subsequent patient management of breast cancer. The IWDM conference series was initiated at a 1993 meeting of the SPIE Medical Imaging Symposium in San Jose, CA, with subsequent meetings hosted every two years at sites around the world. Previous meetings were held in York, England; Chicago, IL USA; Nijmegen, Netherlands; Toronto, Canada; Bremen, Germany; Durham, NC USA and Manchester, UK. th The 9 IWDM meeting was attended by a very international group of participants, and during the two and one-half days of scientific sessions there were 70 oral presentations, 34 posters and 3 keynote addresses. The three keynote speakers discussed some of the "hot" topics in breast imaging today. Karen Lindfors spoke on "Dedicated Breast CT: Initial Clinical Experiences. " Elizabeth Rafferty asked the question is "Breast Tomosynthesis: Ready for Prime Time?" Finally, Martin Tornai discussed "3D Multi-Modality Molecular Breast Imaging.

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Breast Density, Texture and Risk I.- Improvements to Single Energy Absorptiometry Method for Digital Mammography to Quantify Breast Tissue Density.- Breast Density Segmentation: A Comparison of Clustering and Region Based Techniques.- Mammographic Segmentation Based on Texture Modelling of Tabár Mammographic Building Blocks.- Analyzing Tree-Like Structures in Biomedical Images Based on Texture and Branching: An Application to Breast Imaging.- Volumetric Assessment of Breast Tissue Composition from FFDM Images.- Effect of Image Quality on Film Reading.- A Comparison between Film-Screen Mammography and Full-Field Digital Mammography Utilizing Phase Contrast Technology in Breast Cancer Screening Programs.- Impact of Digital Mammography in Breast Cancer Screening: Initial Experience in a National Breast Screening Program.- Clinical Performance of Breast Tomosynthesis as a Function of Radiologist Experience Level.- BIRADS Classification in Breast Tomosynthesis Compared to Mammography and Ultrasonography.- Stereoscopic Digital Mammography: Improved Accuracy of Lesion Detection in Breast Cancer Screening.- Potential Role of FDG-PET Imaging in Defining Biology of Primary Breast Lesions.- Clinical Usefulness of Super High-Resolution Liquid Crystal Displays Using Independent Sub-pixel Driving Technology.- The Effect of Tomosynthesis X-Ray Pulse Width on Measured Beam Quality.- Tomographic Dual Modality Breast Scanner.- Dual-Energy X-Ray Absorptiometry Method Using a Full Field Digital Mammography System.- Optimization of a Dual-Energy Contrast-Enhanced Technique for a Photon Counting Digital Breast Tomosynthesis System.- Simulation and Phantom Studies of Contrast-Enhanced Dual Energy Mammography (CEDEM).- Preliminary Evaluation of a Phase Contrast Imaging with Digital Mammography.- Poster Session I.- Prompting in Mammography: Reproducibility.- Synthesising Abnormal Structures in Mammograms Using Pyramid Decomposition.- Computer-Aided Microcalcification Detection on Digital Breast Tomosynthesis Data: A Preliminary Evaluation.- Temporal Analysis of Mammograms Based on Graph Matching.- Temporal Subtraction Versus Dual-Energy Contrast-Enhanced Digital Breast Tomosynthesis: A Pilot Study.- Texture-Based Simultaneous Registration and Segmentation of Breast DCE-MRI.- A CDMAM Image Phantom Software Improvement for Human Observer Assessment.- Computerized Classification of Mammary Gland Patterns in Whole Breast Ultrasound Images.- Comparison between Physical Image Quality as Measured by a Newly Developed Phantom Dedicated for Digital Mammography QC and That by European Guidelines Methods.- Assuring Authenticity of Digital Mammograms by Image Watermarking.- Different Search Patterns and Similar Decision Outcomes: How Can Experts Agree in the Decisions They Make When Reading Digital Mammograms?.- Optimization of Tomosynthesis Acquisition Parameters: Angular Range and Number of Projections.- Subtle Abnormalities in Highly Dense Breasts Detected by Use of a Digital Phase Contrast Mammography System: A Report of Three Invasive Cancer Cases in the Early Stage.- Image Quality Assessment and Equipment Optimisation with Automated Phantom Evaluation in Full Field Digital Mammography (FFDM).- Breast Mass Detection under Increased Ambient Lighting.- Reducing Noise of Medical Grade Liquid Crystal Displays (LCD) and Its Relation to the Detection of Micro-calcifications.- An Ontology to Support Adaptive Training for Breast Radiologists.- Image Analysis and CAD I.- A Web Database for Computer-Aided Detection and Diagnosis of Medical Images.- An Interactive Computer Aided Decision Support System for Detection of Masses in Mammograms.- Detection of Masses in Digital Breast Tomosynthesis Mammography: Effects of the Number of Projection Views and Dose.- Effect of Similarity Metrics and ROI Sizes in Featureless Computer Aided Detection of Breast Masses in Tomosynthesis.- Knowledge Transfer across Breast Cancer Screening Modalities: A Pilot Study Using an Information-Theoretic CADe System for Mass Detection.- Gradient Vector Flow Fields and Spiculated Mass Detection in Digital Mammography Images.- The Evaluation of Effects on Breast Cancer Diagnoses When Using Mammographic Semantic Information.- Computerized Scheme for Focal Asymmetric Densities on Mammograms by Use of Geometric and Texture Analyses.- Identifying Corresponding Lesions from CC and MLO Views Via Correlative Feature Analysis.- Image Analysis and CAD II.- Case-Specific Reliability Assessment for Improved False Positive Reduction with an Information-Theoretic CAD System.- Computerized Detection and Classification of Malignant and Benign Microcalcifications on Full Field Digital Mammograms.- The Effect of Training Sample Size on Performance of Mass Detection.- Multiple-Instance Learning Improves CAD Detection of Masses in Digital Mammography.- Optimizing the CAD Process for Detecting Mammographic Lesions by a New Generation Algorithm Using Linear Classifiers and a Gradient Based Approach.- Reliability Assessment of Ensemble Classifiers: Application in Mammography.- Breast Mass Classification on Full-Field Digital Mammography and Screen-Film Mammography.- Detection of Microcalcifications Using a Nonuniform Noise Model.- The Breast Biomechanics Reference State for Multi-modal Image Analysis.- An Ideal Observer for a Model of X-Ray Imaging in Breast Parenchymal Tissue.- Statistical Appearance Models of Mammographic Masses.- Validation of a Digital Mammography Image Simulation Chain with Automated Scoring of CDMAM Images.- Comparison of Two Methods to Develop Breast Models for Simulation of Breast Tomosynthesis and CT.- Statistical Deformation Models of Breast Compressions from Biomechanical Simulations.- Image Analysis and CAD III.- Classification of Benign and Malignant Masses in Ultrasound Breast Image Based on Geometric and Echo Features.- Validation of Cone-Beam CT Measurements of Tumour Burden Using Three-Dimensional Histopathology: Initial Results For a Lumpectomy.- A Tool for Temporal Comparison of Mammograms: Image Toggling and Dense-Tissue-Preserving Registration.- Development of Whole Breast Ultrasound Viewer and Automated Mass Detection System.- Automated Registration of Volumes of Interest for a Combined X-Ray Tomosynthesis and Ultrasound Breast Imaging System.- Poster Session II.- Estimating Individual Cancer Risks in the UK National Breast Screening Programme: A Feasibility Study.- Clinical Performance of Digital Breast Tomosynthesis Versus Full-Field Digital Mam…