The purpose of this study was to investigate the effects of energy of virtual monochromatic images (VMIs) and the strength of iterative reconstruction on computed tomography (CT) number, image noise, and visual evaluation. Low keV VMIs improve the CT number of the contrast agent but also increases image noise, making them difficult to use. However, the adoption of iterative reconstruction has made low keV VMIs possible to use. We scanned a phantom containing dilute contrast agent with single energy (SE) and dual energy (DE) scanned images, comparing CT number, image noise (SD), and the contrast-to-noise ratio (CNR). The CT number and SD of 40 keV VMIs were 2.8 and 2.4 times higher, respectively, than those of 120-kV CT images. VMIs showed an inferior CNR compared with SE images due to increased image noise. The higher the strength of iterative reconstruction, the higher the visual evaluation score. Visual evaluation scores were highest at 50 keV. Low-keV VMIs are greatly affected by increased image noise. But by taking into the effects of parameters such as tube voltage and strength of iterative reconstruction, low keV VMIs can improve the visualization of blood vessels and reduce the use of contrast agent.

Purpose: This study aimed to analyze the terminal care attitudes of healthcare members engaged in palliative care and the factors associated with these attitudes. Methods: We conducted a survey for healthcare members engaging in palliative care including oncologists and palliative care doctors using the Japanese version of the Frommelt Attitudes Toward Care of the Dying (FATCOD B-J), a scale that measures the attitude of medical stuff toward the care of dying patients. Results: A total of 223 (response rate=42.2%) responses were obtained and analyzed. Multiple regression analysis using the FATCOD B-J total score as the objective variable showed that 30s had lower partial regression coefficients than 40s (−3.8). Higher “satisfaction from work” and “interest in palliative care” were associated with greater partial regression coefficients (+5.7, +6.2). Conclusion: A sense of satisfaction and interest in palliative care may be important to cultivate terminal care attitudes among health care providers involved in palliative care.