Helium-3 Diffusion MR Imaging of the Human Lung Over Multiple Time Scales
نویسندگان
چکیده
منابع مشابه
Assessment of lung development using hyperpolarized helium-3 diffusion MR imaging.
PURPOSE To determine whether hyperpolarized helium-3 (HHe) diffusion MR can detect the expected enlargement of alveoli that occurs with lung growth during childhood. MATERIALS AND METHODS A total of 29 normal subjects aged four to 30 years underwent HHe diffusion MR imaging with the b-value pair 0, 1.6 second/cm(2). A second acquisition during a separate breathhold was performed using the b-v...
متن کاملBronchiolitis Obliterans following Lung Transplantation: Evaluation with Hyperf’olarized Helium-3 Mr Imaging
BOS Stace ABSTRACT Chronic rejection evidenced as bronchiolitis obliterans syndrome (BOS) is the most common cause of allograft dysfunction alter lung transplantation (LTX). Currently, BOS is diagnosed indirectly based by pulmonary function tests. We investigated the potential of hyperpolarized helium-3 (H’He) MRI in assessing BOS in 13 LTX patients by correlating the percent H’He ventilation o...
متن کاملCongestion Control over Multiple Time Scales
In this paper congestion control over different time scales has been investigated to support data transport over a switched optical packet LAN. An innovative local access control protocol has been designed to shape different traffic sources to produce smoothed optical packet traffic which has a constant inter-arrival time. This protocol employs a centralized scheduling and resource allocation s...
متن کاملDiffusion MR imaging in multiple sclerosis: technical aspects and challenges.
SUMMARY Diffusion tensor (DT) MR imaging has frequently been applied in multiple sclerosis (MS) because of its ability to detect and quantify disease-related changes of the tissue microstructure within and outside T2-visible lesions. DT MR imaging data collection places high demands on scanner hardware and, though the acquisition and postprocessing can be relatively straightforward, numerous ch...
متن کاملDiffusion-weighted MR imaging offers no advantage over routine noncontrast MR imaging in the detection of vertebral metastases.
BACKGROUND AND PURPOSE Diffusion-weighted MR imaging of the spine has been used to differentiate benign from pathologic vertebral body compression fractures. We sought to determine the utility of diffusion-weighted MR imaging in the detection of vertebral metastases and to compare it with conventional noncontrast T1- and T2-weighted MR imaging. METHODS Fifteen patients with metastases to the ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Academic Radiology
سال: 2008
ISSN: 1076-6332
DOI: 10.1016/j.acra.2007.10.009