Computed tomography scans of documented pulmonary mold infections were reviewed for the presence of the reversed halo sign, a focus of ground-glass attenuation surrounded by a solid ring. The reversed halo sign was an early sign, seen in approximately 4% of patients with pulmonary mold infections, usually with zygomycosis.
Richter syndrome (RS) is associated with poor outcome. The prognosis of patients with histologically aggressive chronic lymphocytic leukemia (CLL), or HAC, has not been studied. We aimed to correlate 2-deoxy-2-[(18)F]fluoroglucose/positron emission tomography (FDG/PET) data, histological diagnosis, clinical characteristics, and survival in patients with… (More)
We read with interest the article 'The atoll sign' by Walsh and Roberton 1 in the November issue of Thorax. The authors report a case of cryptogenic organising pneumonia with the atoll sign, also called the reversed halo sign. As mentioned by the authors, this CT sign was first described in cryptogenic organising pneumonia and was initially considered to be… (More)
Expertise with encoding material has been shown to aid long-term memory for that material. It is not clear how relevant this expertise is for image memorability (e.g., radiologists' memory for radiographs), and how robust over time. In two studies, we tested scene memory using a standard long-term memory paradigm. One compared the performance of… (More)
Key Points • Histologically aggressive CLL differs from histologically indolent CLL. Patients with different CLL phases but similar SUV max have similar outcomes. • FDG/PET is a useful diagnostic tool for patients with CLL and suspected transformation. Richter syndrome (RS) is associated with poor outcome. The prognosis of patients with histologically… (More)
RATIONALE AND OBJECTIVES To investigate the effect of being forewarned that they would be asked to identify repeated images on radiologists' recognition of previously interpreted versus new chest radiographs. MATERIALS AND METHODS Thirteen radiologists viewed 60 posterior-anterior chest radiographs, 31 with and 29 without nodules, in two sets of 40 images… (More)
OBJECTIVE Laboratory observer performance measurements, receiver operating characteristic (ROC) and free-response ROC (FROC) differ from actual clinical interpretations in several respects, which could compromise their clinical relevance. The objective of this study was to develop a method for quantifying the clinical relevance of a laboratory paradigm and… (More)