[en] This article presents and describes a general review of the foundations of the principal methods of NMR flow imaging. The limits and advantages of the different methods are discussed

[en] Osseous scintigraphy in three steps is a non invasive examination, easy to practice, and whom interest is recognized by doctors face to diagnosis and treatment problems in the case of algodystrophy. Our study establishes that the diagnosis can be made with a quasi certainty if the investigation is early after a setting off factor. With a low level irradiation this examination can be repeated to follow the evolution of the illness and last point it is a mean to study some aspects of algodystrophy not completely understood. 12 refs., 2 tabs

[en] The liver-gallbladder scintiscanning, non invasive and easy implementation checking,is very useful in the orthotopical auxiliary liver grafts. To improve the scintiscanning performances we might wish to dispose liver-gallbladder dysfunctioning more specifical critters, particularly to be able to distinguish between spoil and cholestasis. 24 refs., 3 tabs., 2 figs

[en] We explain in this paper the development of a low cost small Nuclear Magnetic Resonance (NMR) imaging system, using a 940 G electro-magnet and a 4 MHz fixed frequency NMR minispectrometer. The field gradients and acquisition system commands, as also the images processing are carried out by two microcomputers. The maximum diameter of the samples to analyse depends on the probes used (6.9 or 22 mm). The image sequences (Inversion Recovery, Partial Saturation, Spin Echo, etc.) are defined by programming the minispectrometer. The slice thickness is at present determined by the longitudinal dimension of the radiofrequency coil, which is respectively 16 and 10 mm for the two probes. The images, which are obtained by filtered backprojection or two DFT, have respectively 150 and 500 μm ''in slice'' spatial resolution, following the used probe. For one signal average, the total time necessary to obtain a two DFT spin-echo 64x64 image is about 2 min

[en] Short communication

No abstract available

[en] This paper developes the principal NMR methods concerning the determination of the parameters of stationary fluids flowing in rigid tubes. We have limited our study to the techniques which are still used or which can be soon applied for hemodynamics measurements in vivo. The non invasive NMR approach of vascular dynamical flow parameters and the possible link with NMR imaging techniques are discussed

[en] This work shows that hepato-biliary scintigraphy is of great interest to keep track of patients just liver transplanted. This investigation is easy to realize without any constraint for the patient and provide data to detect principal complications of transplantation. 8 refs., 4 tabs

[en] In 26 patients with orthotopic liver graft, hepatobiliary scintigraphy (^99mTc-mebrofenin; 180-330 MBq) was performed in early post-operative period (9.1 ± 4.3 days). The examination included an angio-scintigraphic phase and a functional phase. In all patients the bile duct reconstruction was achieved by a choledoco-choledocostomy 'with' (n = 13) or 'without' (n 13) T-tube stenting. The region of interest method allowed to generate time-activity curves A(t) for the liver graft for the angio-scintigraphic phase in order to evaluate the relative contribution of arterial and portal component and for the functional phase in order to identify captation and/or excretion abnormalities. Quantitative analysis of these curves gave three groups of results: a normal perfusion did not necessarily imply a normal captation (8/9 cases ie, 89 %) nor a normal excretion (7/9 cases ie, 78 %); an abnormal perfusion was always associated with a abnormal captation external drainage (respectively 11/13 cases ie, 85 % and 7/13 ie, 54 % for excretion). This study showed that hepatobiliary scintigraphy was e vary useful examination to detect perfusion and function abnormalities of liver graft and to evaluate the influence of drainage on the functional status of the graft in the early post-operative period. (author)

[en] Fifteen quantitative bone scintigraphies were performed in an adolescent girl during the follow-up of a femoral osteogenic sarcoma treated by chemotherapy and massive allograft. Three hours after injection of the radiopharmaceutical (7.4 MBq/kg of 99mTc-MDP) bone activity was measured in the inferior limbs at several regions of interest centered on the hips, femurs (proximal, middle, distal) and proximal tibias. The variations of relative bone activities A/S (ratio of corresponding counting rates between two homologous regions in the affected A and in the healthy S limb) and of absolute bone activities (expressed in counts/pixel-second) are interpreted as a function of times during treatment. The quantitative results are discussed with regard to main phenomena influencing bone activity in this particular clinical case: bone growth, chemotherapy and neo-osteogenesis in allograft