A common task in coal exploration is evaluating reserves by estimating some form of isopach map. Available machine-contouring packages, because of their gridding/contouring sequence, are generally unsatisfactory for this purpose. A different approach considers an isopach map as the difference between two complete digital models of the upper and lower surfaces involved. In addition, whereas a to...

A new method of surface-quality assessment is presented. The model of highlight lines is introduced, and its properties and applications in surface-quality evaluation are demonstrated. The differential equation of the highlight-line model is derived, and the difficulty involved in seeking its analytical solutions is discussed. Alternatively, the creation of highlight lines is formulated as a su...

BACKGROUND The mons region is often affected by massive weight loss (MWL), with descent of the pubic area and residual adiposity. Thinning and resuspension are often performed concomitantly with abdominal contouring procedures. OBJECTIVES Assess patient satisfaction, as well as functional and aesthetic results, after monsplasty in the MWL population. METHODS The authors identified 54 consec...

PURPOSE This in vitro study aimed to analyze and compare the reproducibility of zirconia and lithium disilicate crowns manufactured by digital workflow. MATERIALS AND METHODS A typodont model with a prepped upper first molar was set in a phantom head, and a digital impression was obtained with a video intraoral scanner (CEREC Omnicam; Sirona GmbH), from which a single crown was designed and m...

We present a new arrangement for contouring by electronic speckle pattern interferometry with four illumination beams, thereby making it unnecessary to move anything during the.

To obtain a higher level of contouring motion control performance for linear-motor-driven multi-axes mechanical systems subject to significant nonlinear cogging forces, both coordinated control of multi-axes motions and effective compensation of cogging forces are necessary. In addition, the effect of unavoidable velocity measurement noises needs to be carefully examined and sufficiently attenu...

BACKGROUND To evaluate the accuracy of the combined maximum and minimum intensity projection-based internal target volume (ITV) delineation in 4-dimensional (4D) CT scans for liver malignancies. METHODS 4D CT with synchronized IV contrast data were acquired from 15 liver cancer patients (4 hepatocellular carcinomas; 11 hepatic metastases). We used five approaches to determine ITVs: (1). ITVAl...

BACKGROUND Three-dimensional ultrasound (3DUS) at simulation compared to 3DUS at treatment is an image guidance option for partial breast irradiation (PBI). This study assessed if user dependence in acquiring and contouring 3DUS (operator variability) contributed to variation in seroma shifts calculated for breast IGRT. METHODS Eligible patients met breast criteria for current randomized PBI ...