𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Studies of anomalous diffusion in the human brain using fractional order calculus

✍ Scribed by Xiaohong Joe Zhou; Qing Gao; Osama Abdullah; Richard L. Magin


Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
329 KB
Volume
63
Category
Article
ISSN
0740-3194

No coin nor oath required. For personal study only.

✦ Synopsis


It is well known that diffusion-induced MR signal loss deviates from monoexponential decay, particularly at high b-values (e.g., >1500 sec/mm 2 for human brain tissues). A number of models have been developed to describe this anomalous diffusion behavior and relate the diffusion measurements to tissue structures. Recently, a new diffusion model was proposed by solving the Bloch-Torrey equation using fractional order calculus with respect to time and space (Magin et al.,


📜 SIMILAR VOLUMES


Diffusion imaging of the human brain in
✍ Klaus-Dietmar Merboldt; Wolfgang Hänicke; Harald Bruhn; Michael L. Gyngell; Jens 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 935 KB

## Abstract This paper describes a new method for diffusion imaging of the human brain __in vivo__ that is based on a combination of diffusion‐encoding gradients with high‐speed STEAM MR imaging. The single‐shot sequence 90°‐TE/2‐90°‐TM‐(α‐TE/2‐STE)~__n__~ generates __n__ = 32–64 differently phase‐

MRI of “diffusion” in the human brain: N
✍ Klaus-Dietmar Merboldt; Harald Bruhn; Jens Frahm; Michael L. Gyngell; Wolfgang H 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 495 KB 👁 1 views

Diffusion-weighted' MRI in the normal human brain and in a patient with a cerebral metastasis is demonstrated. The method employed was a modified CE-FAST sequence with imaging times of only 6-10 s using a conventional 1 S-T whole-body MRI system (Siemens Magnetom). As with previous phantom and anima

On the use of NMR pulsed field-gradient
✍ Jörg Kärger; Günter Vojta 📂 Article 📅 1987 🏛 Elsevier Science 🌐 English ⚖ 237 KB

Theoretical questions of NMR spin echo attenuation due to diffusion in fractal systems are examined. The mean-square displacement of anomalous diffusion depends sublinearly on time. Therefore, this stochastic process is not invariant against time translation. The correct adjustment of the time scale

Use of anatomical parcellation to catalo
✍ Natalie Tzourio; Laurent Petit; Emmanuel Mellet; Christophe Orssaud; Fabrice Cri 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 186 KB 👁 2 views

We describe a functional neuroanatomy approach that combines structural (MRI) and functional (PET) data at the individual level. For each subject MRI dataset, sulci are first localized using hemisphere surface rendering and sections and stored. Using these landmarks, the subject brain volume is then

Synthesis of radiotracers for studying m
✍ Robert F. Dannals; Bengt Långström; Hayden T. Ravert; Alan A. Wilson; Henry N. W 📂 Article 📅 1988 🏛 Elsevier Science ⚖ 298 KB

Dexetimide (Fig. la), a potent muscarinic cholinergic receptor antagonist, and levetimide (Fig. lb), its pharmacologically inactive enantiomer, were labeled with "C for non-invasive in vivo studies of muscarinic cholinergic receptors in the human brain using positron emission tomography. The synthes