Comparison of three-dimensional negative-contrast CT cholangiopancreatography with three-dimensional MR cholangiopancreatography for the diagnosis of obstructive biliary diseases

Differentiation of noncalculous periampullary obstruction: comparison of CT with negative-contrast CT cholangiopancreatography versus MRI with MR cholangiopancreatography

“…This is because of the requirement for manual segmentation of the liver and pancreas from the low density surrounding them (gas, fat, etc.) [23]. However, in our study, reducing the segmented width for projection could shorten the post-processing time for nCTCP accordingly.…”

“…However, post-processing of nCTCP with total volume projection is still time consuming [13]. In this study, a corresponding thick-slab or 3D MRCP image could be obtained when nCTCP used the subvolume MinIP technique, and, furthermore, the postprocessing time could be shortened further compared with previous report [23]. Thus, nCTCP with subvolume MinIP may be a more practical technique.…”

“…With this method, MinIP images without additional radiation and specific contrast agent can be applied, and varieties of thin-section reconstruction images can be obtained [12]. More recent studies have suggested that 3D nCTCP had a similar effect to 3D MRCP for the diagnosis of obstructive biliary diseases [23]. Because of its quick imaging speed, CT can still serve as an alternative in patients not eligible for MR examinations (e.g., cardiac pacemaker, metal clips, severely ill, etc.).…”

Off-site evaluation of three-dimensional ultrasound for the diagnosis of thyroid nodules: comparison with two-dimensional ultrasound

“…In the 2-dimensional axial (a) and longitudinal (b) US images, two radiologists categorized the nodule in the left lobe of thyroid gland as indeterminate, and one radiologist categorized it as suspicious malignant. However, in the evaluation of the 3-dimensional axial (c), longitudinal (d) and coronal (e) images, three radiologists categorized the nodule as suspicious malignant because they consistently interpreted its margin as spiculated, which was one of the suspicious malignant features, especially due to the features on the coronal images reported in the malignancy of various other organs [10,12,[21][22][23]. Because extrathyroidal extension is a well-known prognostic factor and risk factor of recurrence, preoperative assessment for the presence of extrathyroidal extension is important for the planning of the surgical extent [2,[24][25][26].…”

Comparison of acute cholangitis with or without common bile duct dilatation

“…Abdominal US and CT are able to identify bile duct obstruction, dilatation of the common bile duct (CBD) and gallstones (10). For patients with contraindications to MRCP, the 3D structure of the CBD may be visualized with CT (11). However, these diagnostic imaging techniques primarily evaluate CBD dilatation, thus it is difficult to use imaging techniques to diagnose acute cholangitis in patients without CBD dilatation.…”