Biomedical subjects

L Steyaert

Publications and source records attributed to L Steyaert.

12 recordsLinked to original sources

PubMed1991

Denta Scan: CT software program used in the anatomic evaluation of the mandible and maxilla in the perspective of endosseous implant surgery.

A radiological technique, using a new CT software program for the evaluation of alveolar process height and width, is presented. Irradiation is kept within acceptable limits when this technique is used. Measurements obtained with this technique were compared with those obtained on panoramic radiographs in 40 "half-jaws" (21 maxillar and 19 mandibular). We found that new indications for implantation emerge in the mandibular region because 'Denta Scan' can sometimes show possibilities to place implants on the buccal side of the canal (2 of 19 mandibular cases) when no possibilities are present above the canal on both the panoramic radiographs and Denta Scan images. In the maxillar region Denta Scan avoids unnecessary interventions by demonstrating the insufficient width of the alveolar ridge, often missed on panoramic radiographs (4 of 21 maxillar cases). Moreover the use of Denta Scan allows the use of implants with optimal length and diameter (23 of the 40 cases), giving better long-term results.

Alveolar Process↗

PubMed1990

[Dynamic MRI of temporomandibular joint: technique and application].

Internal derangements or disk dysfunctions represent the most frequent pathology of the temporomandibular joint (TMJ). The radiological study of TMJ dysfunction was, for a long time, restricted to arthrography. More and more MR is used to study the TMJ, because MR, allows non-invasive visualisation of without the use of X-rays. Moreover a "dynamic" MR technique can be used to study disk movements during mouth opening. A lot of the internal derangement problems can be solved with this technique and arthrography can often be avoided. This dynamic MR technique is described and some cases are discussed.

Adult↗

PubMed1990

Tissue characterization of atheromatous plaques: correlation between ultrasound image and histological findings.

Fifty-four atheromatous plaques of carotid arteries, obtained at autopsy, were scanned with a high-resolution real-time instrument, then histologically examined. Comparison between atherogenesis assessed first by histology then by ultrasonography allowed us to differentiate young from old plaques. An old plaque is characterized by a dense heterogeneous echo pattern and irregular borders or ulceration. Previous studies have shown a correlation between the presence of hemorrhage and ulceration of atheromatous plaques in the carotid, and the frequency of cerebral complications. Since these characteristics were mainly found in older plaques, we consider them to be the most important ones clinically.

Arteriosclerosis↗

PubMed1990

Herniography in adults: review and personal studies.

In 120 adults (87 men, 33 women) with suspicion of a hernia but with normal physical examination, herniography disclosed 125 positive findings correlated with the clinical manifestations. There were no false positive or false negative herniographic diagnoses among 25 patients who underwent surgery. Herniography is a useful examination to evaluate patients with an uncertain or normal physical examination and with clinical manifestations suggestive for hernia. This relatively simple technique and the use of a non-ionic contrast medium are well tolerated.

Adolescent↗

PubMed1990

Ultrasonographic findings in peptic ulcer: a report on 24 cases proven endoscopically.

A series of 24 patients is presented who had routine upper abdominal sonography for reason of atypical abdominal pain; in all cases the sonographically suggested diagnosis of a mucosal ulceration was proved by a following endoscopy. The ultrasonic findings were localized thickening of the gastric wall in combination with presence of liquid intragastrically in a fasting patient.

Endoscopy, Gastrointestinal↗

PubMed1990

Giant angiomyolipoma with atypical arteriovenous shunting: CT and angiographic studies.

The advent of both ultrasound and computerized tomography made the pre-operative diagnosis of angiomyolipoma much easier. However, differentiation from retroperitoneal, perinephric space and especially intrarenal liposarcoma remains difficult or impossible. Angiographic findings are atypical and often do not allow differentiation from renal cell carcinoma. Early filling of the renal vein in renal cell carcinoma is sometimes used to distinguish renal cell carcinoma from angiomyolipoma. A case of a giant angiomyolipoma with arteriovenous shunting and early filling of the renal vein is described.

Angiography↗

PubMed1988