Revolution evo

Aortic calcification index (ACI) was examined as a clinical indicator of abdominal aortic calcification. ACI was quantitatively measured using abdominal CT images (Revolution EVO; GE Healthcare Japan, Tokyo, Japan) by evaluating 10 slices of the aorta scanned at 10-mm intervals above the bifurcation of the common iliac arteries as previously described [18 (link)]. Each slice was divided into 12 sectors, and the numbers of sectors with calcification were counted. For example, if 8 out of 12 sectors were calcified in slice 1, this was scored as 8/12=66.7% (Fig. 2). The ACI (%) was calculated by averaging the percentage of calcification-positive sectors in slices 1–10. ACI was measured by a single investigator in a blinded manner. All abdominal CT examinations were performed as an annual routine screening for renal cell carcinoma within 6 months before or after evaluating the SHIM score.

Chest CT studies were performed using a variety of vendors and systems: SOMATOM Definition AS (Siemens Healthineers, Erlangen, Germany [n = 50]); SOMATOM Edge Plus (Siemens Healthineers, Erlangen, Germany [n = 35]); SOMATOM Perspective (Siemens Healthineers, Erlangen, Germany [n = 2]); LightSpeed VCT (GE Healthcare, Chicago, United States [n = 33]); Revolution HD (GE Healthcare, Chicago, United States [n = 13]); Revolution EVO (GE Healthcare, Chicago, United States [n = 6]); and Aquilion Prime (Canon Medical Systems, Otawara, Japan [n = 13]). A non-contrast chest CT was performed on patients with COVID-19 symptoms to evaluate for potential pneumonia lesions (n = 46), and a chest CT angiogram with iodine contrast [100–200 mL of Iopamidol (Isovue, Bracco Diagnostics), depending on patient's weight, administered by bolus injection] was performed in patients in whom pulmonary embolic disease was suspected (n = 106). CT acquisition parameters are listed in Supplementary Table 1.

The imaging techniques used in the study included chest CT scans obtained without contrast in the supine position, in deep inspiration, using 16-detector (Toshiba aquilion), 64-detector (Philips, Brilliance, Netherlands), or 128-detector CT (GE Revolution EVO, USA). All images were processed with standard mediastinal and lung window settings, and axial, coronal, sagittal reformat images were structured with the 3D Slicer program. 3D volumetric images and minimum intensity projection (MinIP) images showing trachea, main bronchi, lobar and segmental bronchial branches were obtained from these images. The scanning parameters were; rotation time: 0.5-0.6 s., 120 kV, 50-500 mA, section thickness: 1.25 mm, section interval: 1.25 mm, pitch: 1.375-1.388.
CT images of the patient and control groups were evaluated again to note the TBV at three different times and were recorded by a radiologist with eight years of experience in thoracic radiology. CXRs of pneumoconiosis cases were classified according to the International Labour Organization (ILO) International Classification of Radiographs of Pneumoconioses12 by an occupational diseases specialist who is a certified reader of pneumoconiosis.