Search for dissertations about: "t2"

Showing result 1 - 5 of 155 swedish dissertations containing the word t2.

  2. 1. Evaluation of MRI as a diagnostic method in biliary tract conditions

    Author : Katarina Håkansson; Avdelningen för klinisk kemi och farmakologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Klinisk fysiologi; radiologi; tomografi; medicinsk instrumentering; medical instrumentation; tomography; radiology; Clinical physics; T2; T1; Relaxation rate; Gallbladder bile; Acute cholangitis; Biliary duct injury; Biliary duct disease; Cholecystectomy; Bile duct; Acute cholecystitis; ERCP; Ultrasound; MRI; MRCP;

    Abstract : The diagnostic value of modern fast pulse sequences and breath-hold technique was evaluated in a prospective study of patients with suspected biliary diseases. The cost-effectiveness of MRI compared to ultrasound was calculated. READ MORE

  4. 2. Mass Transport Properties in Supramolecular Systems Studied by Diffusion and Relaxation NMR

    Author : Patrik Jarvoll Dae; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NMR; T2; diffusion; hydrogel; exchange dynamics; T1; magnetic susceptibility; organosilica nanoparticles; microstructure; relaxation; supramolecular systems;

    Abstract : This thesis shows how diffusion and relaxation NMR can be applied in various aspects to study mass transport in supramolecular systems. Information about these systems can be obtained, either by direct measurement of the molecules that are incorporated in a supramolecular structure, or via probe molecules, which indirectly gives information about the system. READ MORE

  5. 3. MRI evaluation and image processing in gel dosimetry. A study of selected MRI properties and image processing in 3D gel dosimetry

    Author : Peter Magnusson; Malmö Medicinsk strålningsfysik; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Klinisk fysiologi; medical instrumentation; tomography; radiology; Clinical physics; image registering; multi-slice; slice profile; ferrous sulphate; polyacrylamide; 3D volume acquisition; RF field; B1 field; relaxation time; T1; T2; spin-echo; multi-spin-echo; stochastic noise; nonuniformity; SNR; radiologi; tomografi; medicinsk instrumentering; Radiopharmaceutical technology; Radiofarmaceutisk teknik; Physics; Fysik;

    Abstract : Gel dosimetry is a new dosimetry method applied in radiation therapy. Gel dosimeters consist of a radiation sensitive gel, which can integrate absorbed doses from several radiation sources or beams. The dose to the gel can be evaluated by magnetic resonance imaging (MRI), a procedure that is the focus of the present thesis. READ MORE

  6. 4. Experimental studies of confinement in the EXTRAP T2 and T2R reversed field pinches

    Author : Marco Cecconello; KTH; []
    Keywords : extap t2; extrap t2r; reversed field pinch; NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : The confinement properties of fusion plasmas are affected bymagnetic and electrostatic fluctuations. The determination ofthe plasma confinement properties requires the measurement ofseveral global and local quantities such as the ion andelectron temperatures, the electron and neutral densityprofiles, the radiation emissivity profiles, the ohmic inputpower and the particle and heat diffusivities. READ MORE

  7. 5. Contributions to Signal Processing for MRI

    Author : Marcus Björk; Peter Stoica; Andreas Jakobsson; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Parameter estimation; efficient estimation algorithms; non-convex optimization; multicomponent T2 relaxometry; artifact reduction; T2 mapping; denoising; phase estimation; RF design; MR thermometry; in-vivo brain; Elektroteknik med inriktning mot signalbehandling; Electrical Engineering with specialization in Signal Processing;

    Abstract : Magnetic Resonance Imaging (MRI) is an important diagnostic tool for imaging soft tissue without the use of ionizing radiation. Moreover, through advanced signal processing, MRI can provide more than just anatomical information, such as estimates of tissue-specific physical properties. READ MORE