Figure 4a. Coronal multidetector CT images of the right hip, obtained with various detector configurations on a four-channel scanner. In each case, a fixed tube current of 240 mA was used, and gantry rotation time and table speed were constant. Data were reconstructed with an overlap and with each section thickness available with the particular detector configuration used. The reconstructed section thickness and increment were 5.0 mm and 2.5 mm (a), 3.75 mm and 1.8 mm (b), 2.5 mm and 1.25 mm (c), and 1.25 mm and 0.625 mm (d). Note that reconstruction with the thinnest section available is required for adequate evaluation of the articular cortex and joint space of the hip. Config. = detector configuration, CTDIw = weighted CT dose index, Time = scanning time.