16 slice ct scanner

This study included subjects aged ≥16 years without orbital pathology who underwent CT evaluation of LGs at Dr. Ziauddin University Hospital from June 2018 to November 2019. The study protocol was approved by the hospital institutional review board, and each subject provided written informed consent.
All subjects underwent CT scanning of both the right and left LGs using a 16-slice CT scanner (Toshiba, Japan). Both coronal and axial views were taken of each LG. Axial and coronal lengths and widths of each LG were measured as described [10 (link)]. All images were evaluated by a consultant radiologist.
Axial length (AL) was measured from the extreme anterior to the extreme posterior tip and axial width (AW) was measured from the extreme medial to the extreme lateral edge. Coronal length (CL) was measured from the extreme superior to the extreme inferior tip and coronal width (CW) was measured from the extreme medial to the extreme lateral edge.
Data were analyzed using IBM SPSS Statistics for Windows, Version 24.0 (Armonk, NY: IBM Corp.). The normality of the data was evaluated using the Shapiro-Wilk test, with LG dimensions compared by independent sample t-tests. The association between LG dimensions and age was evaluated using Pearson correlation tests.

CT images were acquired using six different CT scanners from four institutions. All patients received a preoperative abdominal contrast-enhanced CT scan. Contrast-enhanced CT examinations in Institution I were conducted using three CT scanners, including a 64-slice and a 256-slice CT scanner (Philips Healthcare), as well as a 16-slice CT scanner (Toshiba Medical System). In Institution II, the CT scans were performed using two CT scanners, including a 64-slice CT scanner (Siemens Healthineers) and a 16-slice CT scanner (Philips Healthcare). The CT scans in Institution III were undertaken using a 64-slice CT scanner (GE Healthcare). The CT scans in Institution IV were conducted using a 256-slice CT scanner (Philips Healthcare). Mean acquisition parameters in the four institutions were: tube voltage of 120 kev (100–130 kev), tube current of 213 mAs (125–300 mAs), pitch of 0.6 to 1.25 mm, slice thickness of 3 to 5 mm, and reconstruction interval of 3 to 5 mm. The contrast agents (Bayer Schering Pharma) were bolus-injected (1.5 mL/kg) at the rate of 2.5–3.5 ml/s with a high-pressure syringe. CT scans of the arterial phase and portal venous phase were carried out at 25 to 35 seconds and 55 to 75 seconds after injection, respectively.

All the patients had chest CTs utilizing a 16 slice CT scanner (Toshiba Medical Systems, Nasu, Japan) without contrast. Window settings that allowed observation of the lung parenchyma were used (window level −600 to −700 HU; window width, 1200–1600 HU). A high resolution-method, using thin slice thickness <1.5 mm was used. All CT findings were evaluated for the following: 1—pattern of lesion (ground glass opacity (GGO), consolidation, crazy paving, combined GGO and consolidation). 2—Distribution (peripheral subpleural, central, or both). 3—Location (unilateral, bilateral). 4—CO-RADS category.