Background Ventricular volumetrics play a fundamental role in cardiac magnetic resonance imaging analysis. Accuracy is of course paramount, and thus crucial that the image data set is precise.This poster defines the correct positioning of the short axis (SA) cinematographic images, and the rationale behind it. Since most volume studies concentrate on the left ventricle (LV) slice positioning fo...

Figure 3. (A) Detail of axial slice of volumetric image for pt 2 showing putamen defined by FIRST. (B) Comparable slice in MD map of same subject. (C) Mask of putamen registered onto MD map. Colour scale: red: 5% partial volume; yellow: 100% Figure 2. Mean diffusivity values [×10 mm.s]. Control subjects: mean ( ) ± SD. Range: red bar. Patients: CJD green symbols. Spastic dystoniablack symbols. ...

Introduction: Atrophy of spinal muscles is associated with degenerative disc disease, alignment disorders and eventually back pain. Diffusion-weighted (DW) MRI of skeletal muscle has been proposed as a sensitive marker of denervation-induced muscle atrophy [1]. However, DW-MRI of spinal muscles remains challenging due to the muscle short T2 and the sensitivity of single-shot EPI to off-resonanc...

Recently, micro-rotation confocal microscopy has enabled the acquisition of a sequence of slices for a non-adherent living cells where the slices' positions are roughly controlled by a dielectric-field biological cage. The high resolution volume reconstruction requires then the integration of precise alignment of slice positions. We propose in the Bayesian context, a new method combining both s...

Introduction: Computed tomography (CT) has numerous applications in clinical procedures but its main problem is its high radiation dose to the patients compared to other imaging modalities using x-ray. CT delivers approximately high doses to the nearby tissues due to the scattering effect, fan beam (beam divergence) and limited collimator efficiency. The radiation dose from multi-slice scanners...

BACKGROUND Tumor volume may serve as a predictor of response to radiochemotherapy (RCT) in head and neck squamous cell carcinoma (HNSCC). Computer assisted tumor volumetry requires time-consuming slice-by-slice manual or semi-automated segmentation. We questioned how accurately primary tumor and suspect cervical lymph node (LN) volumes can be approximated by the maximum tumor diameters in three...

PURPOSE The purpose of this study was to develop a methodology to quantitatively measure the thorax-to-abdomen breathing ratio from a 4DCT dataset for breathing motion modeling and breathing motion studies. METHODS The thorax-to-abdomen breathing ratio was quantified by measuring the rate of cross-sectional volume increase throughout the thorax and abdomen as a function of tidal volume. Twent...