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Biomedical subjects

A M De Schepper

Publications and source records attributed to A M De Schepper.

At least 181 records · Page 10Linked to original sources
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CT angiography: basic principles and post-processing applications.

The introduction of spiral and more specifically multidetector CT scanners has provided unique opportunities in the field of CT angiography. It has also stressed the need of a basic knowledge of post-processing 3D imaging techniques to obtain maximum information of the CT data set. Aim of this article is to give a basic review of technical issues concerning CT angiography, with special attention to 3D imaging techniques such as surface shaded display (SSD), maximum intensity projection (MIP) and volume rendering (VR).

Angiography↗
PubMedDate not supplied

The pelvic congestion syndrome: role of the "nutcracker phenomenon" and results of endovascular treatment.

PURPOSE: Pelvic Congestion Syndrome (PCS) is a less known pathologic condition in multiparous women. The major symptoms are: low abdominal pain, dyspareunia or postcoital ache, gluteal or thigh varices, and emotional disturbances. The purpose of this retrospective study is to evaluate the pathogenesis, diagnosis and immediate, and long-term clinical results of the endovascular treatment of PCS. METHODS AND MATERIALS: From February 1992 until January 2000, 67 diagnostic ovarian vein phlebographies followed by transcatheter embolization were performed in 66 patients with pelvic varicosities. These patients were traced back and submitted to a standardized questionnaire. The data of 48 patients was obtained this way. RESULTS: In 83%, extrinsic compression of the left renal vein between the aorta and the superior mesenteric artery--known as the "nutcracker phenomenon"--was observed together with congestion of the left ovarian vein and pelvic varicosities. The technical success rate of endovascular embolization was 96%. The initial clinical success rate was 86%, with a long-term benefit for 75% of the patients. After embolization there was a reduction in pain intensity, pain attacks, and emotional disturbances. Globally there was a mean reduction of complaints of 73% (Visual Analog Scale). CONCLUSION: The "nutcracker phenomenon" was detected in most of the treated patients and could explain the congestion of the left ovarian vein. Transcatheter embolotherapy is an effective way of treating pelvic varicosities, resulting in a great improvement of the quality of life for most of the patients. In experienced hands the procedure is relatively simple, and it is well tolerated. Moreover it can be performed in one step with the diagnostic phlebographic procedure.

Adolescent↗
PubMedDate not supplied

Massive infarction of a recurrent phyllodes tumor of the breast: MRI-findings.

We report the imaging findings in an infarcted phyllodes tumor of the breast. A 40-year-old woman presented ten months after surgery for a benign phyllodes tumour with a palpable lump under the scar. We performed clinical examination, mammography, sonography, and MRI. The radiological diagnosis was a postoperative hematoma with granulation tissue. Surgery was performed. Histological diagnosis revealed an infarcted phyllodes tumour. This case illustrates the radiological presentation of a completely infarcted phyllodes tumour. As far as we know, imaging findings of an infarcted phyllodes tumour have not been reported yet.

Adult↗
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Heterotaxy syndrome.

Explore the source record for details and available documents.

Abnormalities, Multiple↗
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Unusual musculoskeletal manifestations of Lyme disease.

We report on the imaging features of musculoskeletal abnormalities in a 52-year-old woman suffering from Lyme disease presenting with acrodermatitis chronica atrophicans (ACA). The patient developed recurrent attacks of migratory asymmetrical oligoarthritis, involving articular and peri-articular structures, including the metatarsophalageal (MTP) joints, scapular bone, thoracic spine, elbow, gluteal area, knee, ankle and metacarpophalangeal (MCP) joints. Six months after the first symptoms, Magnetic Resonance Imaging (MRI) showed bone marrow oedema within the proximal phalanx of the right fifth toe, adjacent to an ACA rash. A year after the onset of the disease, swelling at the right scapular region occurred, and MRI showed osseous, periosteal and soft tissue involvement of the superior margin of the right scapula and adjacent rib. On MRI of the spine, there was bone marrow infiltration with irregular delineation of the anterior corner of the thoracic vertebrae 4 to 6, corresponding to an osteoblastic bony lesion on radiographic examination. This case report is unique, because MRI documentation of bony abnormalities and periarticular soft tissue swelling, accompanying an attack of ACA has never been reported previously. Moreover, involvement of the osseous spine and the scapular bone have never been described in the radiological literature.

Acrodermatitis↗
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Accessory navicular bone: not such a normal variant.

The accessory navicular is often erroneously considered as a normal anatomic and roentgenographic variant. Three distinct types of accessory navicular bones have been described. The type 2 and 3 variants have been associated with pathologic conditions such as posterior tibial tendon tear and painful navicular syndrome and therefore should not be arbitrarily dismissed as a roentgenologic variant in a symptomatic patient. The pathogenesis and radiologic findings are discussed and illustrated.

Arthrography↗
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Imaging of tumours of the foot and ankle.

The general presentation of osseous and soft-tissue neoplasms of the foot and ankle is not different from lesions encountered in other parts of the body and imaging features may be nonspecific. Some lesions, however, have a predilection for the foot and ankle and may have typical imaging features, such as plantar fibromatosis or intraosseous lipoma. This presentation aims to give an overview of bone and soft-tissue tumours of the foot and ankle and to discuss the strength of each imaging modality in the diagnosis.

Ankle↗
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[Structure and content of the radiological report: an audit of 94 reports from a university education center].

Efficient communication between the radiologist and the referring clinician is an essential feature of high quality radiology practice. The written report, the only result of the radiological investigation most clinicians will see, should therefore comply with a number of quality criteria. As far as reporting in Dutch is concerned, these criteria have not been clearly defined. Articles on the radiology report are scarce and mostly focus on reporting in English. We have investigated the quality of radiology reporting in a university hospital in Flanders, the Dutch speaking part of Belgium. A weighed sample of 94 reports of 24 radiologists (staff members and radiologists-in-training) was blinded and evaluated by a qualified radiologist with ten years of experience as a writer and editor-in-chief medical magazines. A scoring system was applied, based on five criteria: comprehensible, problem-oriented, correct Dutch, concise, and direct. This article gives an overview of the results and takes a closer look at three of the 94 reports examined.

Humans↗
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Congenital abnormalities of the osseous spine: a radiological approach.

The spine may act as a useful window to the diagnosis of many congenital malformations syndromes and skeletal dysplasias. However, radiological identification of these syndromes remains a difficult task, because there are so many syndromes and dysplasias to remember. Moreover, many spinal abnormalities are non-specific and there is much overlap between different genetic and congenital disorders. Consequently, many radiologists cringe when these topics are discussed. The purpose of this short review is to provide the general radiologist a workable primer for systematic analysis of spinal abnormalities encountered in genetic disorders, which may be helpful in (differential) diagnosis.

Bone Diseases, Developmental↗
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Imaging approach for differential diagnosis of jaw lesions: a quick reference guide.

The radiologists will be frequently consulted to evaluate a variety of maxillomandibular lesions or may incidentally encounter these lesions on routine plain films, computed tomography (CT) or magnetic resonance (MR) studies. This article provides the reader a diagnostic approach pattern when confronted with an unknown jaw lesion. The radiologic analysis for differential diagnosis primarily depends on specific cardinal and additional radiographic criteria on plain film studies. Cardinal radiographic criteria include the density of the lesion and the location with regard to the adjacent tooth structures within the jaw. Additional criteria in the evaluation of jaw lesions are demarcation, morphological characteristics, cortical involvement, periosteal and soft tissue changes.

Ameloblastoma↗
PubMedDate not supplied

Tumors and tumor-like lesions of the jaw: radiolucent lesions.

Radiolucent lesions within the jaws represent a whole variety of lesions. Generally, they can be classified into two categories. The first category comprises well circumscribed lesions, either unilocular, multilobular or multilocular. They may be further subdivided into odontogenic or nonodontogenic lesions. The key feature that distinguishes these two subgroups is the relationship with the underlying dentition. Poorly circumscribed radiolucent lesions are the second category and consist of acute infectious disease and primary or metastatic malignancies. Although many of these lesions may present with non-specific imaging characteristics, careful analysis of a combination of imaging parameters may suggest a presumptive diagnosis. This article discusses the imaging features on different imaging techniques that may be useful in the characterization of these lesions.

Diagnosis, Differential↗
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Tumors and tumor-like lesions of the jaw mixed and radiopaque lesions.

Radiopaque lesions and lesions of mixed radioopacity are far less frequent than their radiolucent counterparts. Included in this spectrum are infectious and metastatic disease, inherited and developmental disorders and rare tumoral lesions. This article deals with the imaging features that may assist in the (differential) diagnosis of these lesions. in many instances, the radiological characterization is typical (osteoma, enostoma, fibrous dysplasia, Paget disease...), obviating the need for further invasive histological confirmation. Other lesions may share overlapping clinical, radiological and pathological features. In these cases, correlation of histopathological diagnosis with clinical findings and imaging features is of utmost importance for a correct diagnosis.

Diagnosis, Differential↗