Purpose: Perinatally HIV-infected youths have abnormal cerebral metabolite concentrations, but this has not been well studied. By incorporating a varying TE, 2D J-resolved spectroscopy reduces spectral crowding by pushing multiplet splittings into a second spectral dimension. Multivoxel MR Spectroscopic Imaging (MRSI) can be used to obtain spectra throughout the brain, providing better coverage...

Localization of 99mTc- hexakis-2-methoxyisobutylisonitrile (99mTc-MIBI) by parathyroid adenomas is well known, and this warrants MIBI scan to evaluate suspected parathyroid adenoma in primary hyperparathyroidism. Typically, the radionuclide concentrates in both the thyroid gland and parathyroid adenoma in early images, and later on delayed images washes out slowly from the...

Objectives: Lung scintigraphy is non-diagnostic in most patients suspected of pulmonary embolism when performed in planar mode. Tomographic mode could improve lung scan performance but has not been rigorously assessed. In this study we assessed the usefulness of tomographic mode in patients with a non-diagnostic lung scan scintigraphy. Methods: pulmonary embolism was diagnosed or ruled out in c...

Introduction Proton spectroscopic imaging of the prostate has become a valuable clinical tool due to its effectiveness in detecting the presence and aggressiveness of prostate tumors [1]. However, the long acquisition times (typically 15-20 minutes) for the 3D phase encoding traditionally employed can be prohibitively long. A flyback echo-planar readout sequence has been developed and recently ...

Incidental extra-osseous uptake of 99mTc-MDP on bone scintigraphy has been frequently reported in the literature; however, calcification of the psoas muscle is a rare condition, which has been reported on magnetic resonance (MR) and computed tomography (CT) imagings. Here we report a 67-year-old woman with acute paraplegia and low back pain who was referred for a 99mTc-MDP...

introduction: the gastrin releasing peptide (grp) receptor is over expressed in a variety of common human tumors. radiolabeled bombesin analogues have exhibited high binding affinity for these receptors. the aim of this study was to assess the value of a new 99mtc-bombesin analog in the differentiation of malignant from benign breast tumors. methods: 99mtc-bombesin scans were performed in 21 pa...

Fluorescence correlation spectroscopy (FCS) is a single molecule technique used mainly for determination of mobility and local concentration of molecules. This review describes the specific problems of FCS in planar systems and reviews the state of the art experimental approaches such as 2-focus, Z-scan or scanning FCS, which overcome most of the artefacts and limitations of standard FCS. We fo...

In industrial applications like rapid prototying and robot vision, where speed or automatic operation is more important than high accuracy, an industrial robot and a laser profile scanner can be used as a 3D measurement system. This paper is concerned with the problem of segmenting the data from such a system into regions that can be fitted with planar surfaces. We have developed a new algorith...