abstract：:Because of their paramagnetic properties, nitroxides are potentially useful as contrast agents in magnetic resonance imaging (MRI). They are reduced in vivo to their corresponding hydroxylamines which are nonparamagnetic and have no contrast enhancing property. Nitroxides with high resistance to reduction would be adv...

journal_title：Magnetic resonance imaging

authors： Couet WR,Brasch RC,Sosnovsky G,Tozer TN

更新日期：1985-01-01 00:00:00

abstract：:A phase encoding method for imaging of chemical shift or magnetic field distributions is described. The method utilizes the spin-echo principle and the time period between signal collection and excitation is constant but the time period between excitation and the 180 degrees pulse is varied by constant steps. The meth...

journal_title：Magnetic resonance imaging

authors： Sepponen RE

更新日期：1985-01-01 00:00:00

abstract：:Gadolinium DTPA was evaluated as an intravenous contrast agent for magnetic resonance imaging in 15 patients with primary or secondary intracranial neoplastic disease. T1 and T2 weighted images were obtained prior to contrast administration. T1 weighted spin echo 35/800 (TE/TR) images were utilized to detect enhanceme...

journal_title：Magnetic resonance imaging

authors： Runge VM,Schoerner W,Niendorf HP,Laniado M,Koehler D,Claussen C,Felix R,James AE Jr

更新日期：1985-01-01 00:00:00

abstract：:Twenty-seven patients with soft-tissue tumors were examined with a Picker 0.15-tesla resistive magnet and by computed tomography (CT). In all but one patient, MRI was better than or equal to CT in defining the anatomic extent of the tumor. We could determine whether major vascular structures were engulfed by the tumor...

journal_title：Magnetic resonance imaging

authors： Weekes RG,Berquist TH,McLeod RA,Zimmer WD

更新日期：1985-01-01 00:00:00

abstract：:Forty-two patients with clinically suspected osteomyelitis were examined using magnetic resonance imaging (MRI). Twenty-seven patients (64%) had previous surgery or fracture, and 15 (36%) were referred for differentiation of acute osteomyelitis from bone tumors or other pathologic conditions. MRI was compared with com...

journal_title：Magnetic resonance imaging

authors： Berquist TH,Brown ML,Fitzgerald RH Jr,May GR

更新日期：1985-01-01 00:00:00

abstract：:Several recent articles have assessed the relative efficiency of nuclear magnetic resonance (NMR) pulse sequences. One consideration that has received little attention is the effect on image contrast of displaying images without information on the sign of the reconstructed signals. The radiofrequency receivers current...

journal_title：Magnetic resonance imaging

authors： Hendrick RE,Nelson TR,Hendee WR

更新日期：1984-01-01 00:00:00

abstract：:More than a dozen Nuclear Magnetic Resonance (NMR) imaging methods have been described using different radio-frequency pulse sequences, magnetic field gradient variations, and data processing. In order to have a theoretical understanding in the most general case, we have conceived a computer program for the simulation...

journal_title：Magnetic resonance imaging

authors： Bittoun J,Taquin J,Sauzade M

更新日期：1984-01-01 00:00:00

abstract：:Magnetic resonance imaging (MRI) is a completely noninvasive modality that has shown significant promise for the evaluation of the cardiovascular system. Our imaging technique employed electrocardiographic (ECG) gating, which resulted in well-resolved images of the cardiac structures. Patients and animals with a varie...

journal_title：Magnetic resonance imaging

authors： McNamara MT,Higgins CB

更新日期：1984-01-01 00:00:00

abstract：:This paper describes a geometrically small NMR imaging system which has been developed and assembled within a university medical center environment. Consideration is given to the technical specifications and basic economics for the magnet system, NMR spectrometer, and computer configuration. Initial research objective...

journal_title：Magnetic resonance imaging

authors： Thomas SR,Ackerman JL,Goebel JR,Davis M,Kereiakes JG,Lin YY

更新日期：1982-01-01 00:00:00