PURPOSE This study aimed to investigate the deviation of landmarks from horizontal or midsagittal reference planes according to the methods of establishing reference planes. MATERIALS AND METHODS Computed tomography (CT) scans of 18 patients who received orthodontic and orthognathic surgical treatment were reviewed. Each CT scan was reconstructed by three methods for establishing three orthog...

Even a mild degree of postoperative deviation of the nasal dorsum and/or columella from the midsagittal plane could be enough to displease a patient. Postoperative judgment of the nasal dorsum and the columellar positioning on the midsagittal plane is somewhat of a subjective decision determined by the surgeons' naked eye. Most innovations tend to evolve from necessities. The risk and reality o...

It is difficult to estimate the midsagittal plane of human subjects with craniomaxillofacial (CMF) deformities. We have developed a LAndmark GEometric Routine (LAGER), which automatically estimates a midsagittal plane for such subjects. The LAGER algorithm was based on the assumption that the optimal midsagittal plane of a patient with a deformity is the premorbid midsagittal plane of the patie...

BACKGROUND Pseudoneglect is a normal left sided spatial bias observed with attempted bisections of horizontal lines and a normal upward bias observed with attempted bisections of vertical lines. Horizontal pseudoneglect has been attributed to right hemispheric dominance for the allocation of attention. The goal of this study was to test the hypothesis that the upward bias in vertical line bisec...

This study is interested in whether there exists a predictable relationship between the midsagittal tongue contour and its related 3D tongue surface shape during speech. The assumption is that for any single language, a limited set of phonemically based 3D tongue shapes are used. If these shapes can be delineated and mapped to specific midsagittal displacements and cross-sectional (coronal) sha...

Real-time Magnetic Resonance Imaging (MRI) at 9 images/s of the midsagittal plane is used as input to a threedimensional tongue model, previously generated based on sustained articulations imaged with static MRI. The aim is two-fold, firstly to use articulatory inversion to extrapolate the midsagittal tongue movements to three-dimensional movements, secondly to determine the accuracy of the ton...

This paper discusses methods for reconstructing the tongue from sparse data sets. Sixty ultrasound slices already have been used to reconstruct three-dimensional (3D) tongue surface shapes [Stone and Lundberg, J. Acoust. Soc. Am. 99, 3728-3737 (1996)]. To reconstruct 3D surfaces, particularly in motion, collecting 60 slices would be impractical, and possibly unnecessary. The goal of this study ...

Fig. 1. A 59-year-old female with parkinsonian multiple system atrophy (MSA-P) with no vertical supranuclear gaze-palsy. A T2weighted image suggests the lateral margin of the posterior tegmentum of the midbrain is ‰at or slightly concave. Note that both superior and inferior colliculi are present in the same plane. Fig. 2. A midsagittal T1-weighted image of the same patient. The horizontal line...

Methods and materials Seventy-seven patients were divided into two groups based on the syrinx/cord (S/C) ratio: one with distended syrinx (S/C ratio > 0.5) and the other with non-distended syrinx (S/C ratio < 0.5). Anteroposterior diameter of the spinal canal was measured at each cervical level on midsagittal T2-weighted MR images, and a linear trend line was ft by least-square regression to ca...