[Optimization of a teleradiology system between two geriatric hospitals and a radiology department of a CHU].

The routine use of a 64 kb/sec Numeris network requires that a compromise be reached between image quality and time required for image transfer. Our goal was to present our experience and describe our choices when reporting examinations for two geriatric hospitals located at a short distance from our radiology department. Different digitization parameters were tested (resolution, compression) for 10 plain films corresponding to the usual clinical situations: abdominal X ray, chest X ray, wrist, spine and pelvis X rays.

[From accreditation to certification. Quality management in a radiology department].

The leaders of a radiology department started a quality process based on ISO 9001 certification and the total quality management program. The purpose of this work is to match the conformity of this quality system to ANAES recommendations. If the concordance is obvious, the advantages of using quality insurance to get an accreditation are important.

[Comparison of accreditation procedures, ISO 9000 certification procedures and total quality management. Personal experiences and application of quality assurance in a department of radiology and medical imaging].

Management of quality assurance protocols in a radiology department can be done by using several tools or models. Some are specific like accreditation manuals issued by some organizations, others like the ISO 9000 certification and the Total Quality management are more general and already well known by manufacturers. In order to implement a process of quality improvement, we have reviewed three models of quality assurance: evaluation in total quality based on the European model "EFQM", accreditation based on booklets from French cancer centers and Canadian radiology centers and, finally, accreditation based on the ISO 9002 certification model.

[Radiologic analysis of known-interval cancers after 2 years of organized mass screening for breast cancer in Ille-et-Vilaine].

The first thirty-two known interval breast cancers (appearing within the first or second year after a negative screen) occurring during a two-year breast screening round were reviewed and the radiograms analyzed. Five classes were established: true interval cancers (13/32 cases), radiologically occult cancers (2/32), cancers with no specific sign (7/32), false negative cancers (5/32) and unclassifiable cancers (5/32). In more than 50% of the cases, there was no abnormality on the initial radiographic test, although the literature reports that the rate of false-negatives in interval cancers is less than 20%.

[Preliminary evaluation of the performance of 3D morphometer and spiral scanner in carotid stenoses].

Carotid stenosis evaluation is now possible with 3D Imaging. We prospectively compared the diagnostic value of Spiral CT and 3D Morphometer with conventional intraarterial DSA considered as the gold standard. We studied 19 bifurcations in 10 patients.

[Glossary of terms used by radiologists in image processing].

We give the definition of 166 words used in image processing. Adaptivity, aliazing, analog-digital converter, analysis, approximation, arc, artifact, artificial intelligence, attribute, autocorrelation, bandwidth, boundary, brightness, calibration, class, classification, classify, centre, cluster, coding, color, compression, contrast, connectivity, convolution, correlation, data base, decision, decomposition, deconvolution, deduction, descriptor, detection, digitization, dilation, discontinuity, discretization, discrimination, disparity, display, distance, distorsion, distribution dynamic, edge, energy, enhancement, entropy, erosion, estimation, event, extrapolation, feature, file, filter, filter floaters, fitting, Fourier transform, frequency, fusion, fuzzy, Gaussian, gradient, graph, gray level, group, growing, histogram, Hough transform, Houndsfield, image, impulse response, inertia, intensity, interpolation, interpretation, invariance, isotropy, iterative, JPEG, knowledge base, label, laplacian, learning, least squares, likelihood, matching, Markov field, mask, matching, mathematical morphology, merge (to), MIP, median, minimization, model, moiré, moment, MPEG, neural network, neuron, node, noise, norm, normal, operator, optical system, optimization, orthogonal, parametric, pattern recognition, periodicity, photometry, pixel, polygon, polynomial, prediction, pulsation, pyramidal, quantization, raster, reconstruction, recursive, region, rendering, representation space, resolution, restoration, robustness, ROC, thinning, transform, sampling, saturation, scene analysis, segmentation, separable function, sequential, smoothing, spline, split (to), shape, threshold, tree, signal, speckle, spectrum, spline, stationarity, statistical, stochastic, structuring element, support, syntaxic, synthesis, texture, truncation, variance, vision, voxel, windowing.

Short-term follow-up of inferior vena caval filters: comparison of imaging techniques.

Objective: The aim of this prospective study was to assess the advantages and limitations of various imaging techniques in identifying problems associated with percutaneous placement of filters in the inferior vena cava.

Subjects And Methods: One hundred four vena caval filters (65 Filcard, 39 Cardial) were placed in 100 patients (four patients received two filters). Venacavograms, duplex sonograms of the abdomen, abdominal radiographs, perfusion scans of the lung, and impedance plethysmograms were obtained in all patients within 1-2 days and 3 months after filter placement.

[The value of MRI in popliteal entrapment syndrome].

The popliteal artery entrapment syndrome (PAES) is a frequent disease of especially young patients, often following a muscular exertion. To avoid the complications, the diagnosis must rapidly be done. According to this report of a 12 year old child, we think that magnetic resonance imaging (MRI) is very accurate to diagnose the abnormalities of the popliteal artery course, the muscular hypertrophies and can relieve of more invasive procedures such as the arteriography associated with known morbidity in young patients.

Recurrent postoperative sciatica: evaluation with MR imaging and enhanced CT.

Magnetic resonance (MR) imaging and computed tomography enhanced with intravenous iodine injection (ECT) were prospectively compared in 80 patients in the diagnosis of recurrent postoperative sciatica. Diagnostic accuracy was determined with surgical verification. Isolated fibrosis was considered a contraindication to surgery.

Hepatic artery injection of I-131-labeled lipiodol. Part II. Preliminary results of therapeutic use in patients with hepatocellular carcinoma and liver metastases.

Internal radiation therapy with transarterial injection of iodine-131-labeled iodized oil (Lipiodol Ultra-Fluide [LUF]) was evaluated in 15 patients with hepatocellular carcinoma and eight with hepatic metastases. Five patients with hepatocellular carcinoma received more than one injection. Treatment tolerance was excellent, as assessed clinically and by means of liver function tests.

Hepatic artery injection of I-131-labeled lipiodol. Part I. Biodistribution study results in patients with hepatocellular carcinoma and liver metastases.

Biodistribution of iodine-131-labeled Lipiodol Ultra-Fluide (I-131 LUF) injected into the hepatic artery was studied scintigraphically in 47 patients with hepatocellular carcinoma (n = 23), hepatic metastases (n = 14), or normal livers (n = 10). The investigation was extremely well tolerated. I-131 LUF concentrated mainly in the liver (L) and the lungs (l), with L/L + l activity ratios greater than 75% for all three groups of patients.

[Comparison of MRI and scanning coupled with myelography in the diagnosis of cervicobrachial neuralgia].

A prospective study was undertaken to compare the accuracy of surface coil magnetic resonance imaging (MRI) and computed tomography with myelography (CTM) in the determination of cervical radiculopathy with or without myelopathy. Twenty five patients underwent both imaging studies. The separately imaging diagnosis and the surgical findings were the basis of this study.

[A new diagnostic method of spondylodiscitis. Magnetic resonance imaging].

Twenty four patients who were hospitalized for a suspicion of spondylodiscitis were prospectively evaluated with magnetic resonance imaging (MRI), radiology and radionuclide studies. Fifteen patients had an infectious spondylodiscitis, four had a vertebral degenerative disease, four had a rheumaticus spondylodiscitis, one had a chemical spondylodiscitis. The microbiological examinations and the clinical development bore the diagnosis out.

[Value of magnetic resonance imaging in the diagnosis of recurrent postoperative lumbosciatica].

Twelve patients who had a subsequent lumbar sciatica after surgery were evaluated with computerized tomography (C.T.) and magnetic resonance imaging (M.

[Angioplasty in primary Budd-Chiari syndrome. Apropos of 3 cases].

Three patients with the primary Budd-Chiari syndrome were treated by percutaneous transluminal angioplasty. Results showed an apparent poor response to angioplasty of irregular stenoses of the suprahepatic vessels and a good response when stenosis was due to membrane, but recurrence of the latter lesion after several months. The transient efficacy of this procedure in cases with a suprahepatic or caval membrane suggests that it be used pre-operatively for this indication.

[The organization of work in radiology. Preparation for computerized appointments].

After four years' experience of the use of a computer-based system for establishing appointments for radiologic examinations, a more elaborate organization is envisaged and its broad outlines described. The developed ideas should assist preparation of one part of the specifications of a computer-based system for a department of medical imaging.

[Emergency uterine embolization in postpartum hemorrhage secondary to coagulopathy].

Acute post-partum hemorrhage secondary to a coagulation disorder was successfully treated by embolization of the uterine arteries. The technique used is described, and the place of embolization as an alternative to surgical procedures discussed.

Pubic pain syndrome in sportsmen: comparison of radiographic and scintigraphic findings.

We studied 32 cases of pubic pain in sportsmen and compared the radiographic and scintigraphic findings. Six case histories are presented in detail. The pubis/sacrum uptake ratio obtained by the use of scan techniques appears to be a useful parameter for following the evolution of the pain.

[Percutaneous spinal and sacroiliac biopsies for diagnostic purposes].

The history of puncture biopsy of the spine is outlined, and a current method using a vertebral disc approach described, including principles (premedication, instrumentation, and puncture techniques), treatment of biopsy samples, and indications and contraindications of the procedure. Results are presented and compared with those reported in the literature.

[Traps in hepatobiliary echotomography caused by technical artifacts and the method of evading them].

Errors encountered during evaluation of hepatobiliary ultrasonography explorations due to various artefacts are described. These are mainly due to the problem of the lateral resolution of ultrasonographic recordings leading to false negatives and positives during diagnosis of the pathological process, lithiasis and cholecystitis. These are also the cause of errors during ultrasound guiding of needle punctures and thus the precision of the explorations.