Key Points Contrast-enhanced abdomen and pelvis computed tomography is often a more appropriate initial imaging strategy for oncology and immunocompromised patients with acute nonlocalized abdominal pain compared with radiographs, ultrasound, or magnetic resonance imaging. Immune checkpoint inhibitors, molecular targeted therapies,…
Key Points In pregnant patients presenting with signs of acute myocardial infarction with no known history of coronary artery disease, spontaneous coronary artery dissection should be suspected. Patients with preexisting vascular conditions, such as aortopathies and hereditary hemorrhagic telangiectasia, should…
Key Points Opportunistic central nervous system infections are most commonly seen in patients with human immunodeficiency virus and are usually associated with profound immunosuppression. Hematologic disorders are frequent in cancer patients and may lead to neurological complications caused by thrombocytopenia,…
Key Points Geriatric patients tend to have atypical presentation of diseases, and the signs and symptoms may be nonspecific, contributing to delayed diagnoses. The incidence of intracerebral hemorrhage increases with age. Advanced age has been identified as the strongest independent…
Introduction Emergency departments (EDs) comprise a major source of medical care for patients in the United States, accounting for approximately 47.7% of the total number of medical care contacts. In 2018, there were over 143 million ED visits, of which…
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The Importance of Postprocessing and Data Analysis for Breast Diffusion Weighted Imaging The role of magnetic resonance imaging (MRI) in breast cancer diagnosis and management is evolving as a supplemental screening tool for high-risk populations. Nowadays, a myriad of magnetic…
Data Acquisition Essential Elements of Calibration (B 0 And B 1 ) Most breast diffusion scans are performed with fat suppression and an echo-planar imaging (EPI) readout. Both these elements have optimal performance with uniform B 0 (magnet) and B…
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As discussed in detail in earlier chapters of this book, diffusion-weighted imaging (DWI) is a powerful tool in the multiparametric assessment of breast lesions with magnetic reconace imaging (MRI) and can provide decisive information for initial detection and classification of…