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B Mesurolle

Publications and source records attributed to B Mesurolle.

49 records · Page 3Linked to original sources
PubMed1997

[Angiographic identification of spinal cord arteries before bronchial artery embolization].

Ischemic spinal cord injury is the major risk of bronchial artery embolization. The spinal artery may be overlooked on initial intercostobronchial trunk arteriography, as a result of reverse flow within the intercostal branch. Its identification, conversely, is easier on postembolization angiography. An illustrative case is presented, with angiographic correlation. The pathophysiology of the reverse flow is discussed. Technical recommendations are proposed for its detection.

Adult↗
PubMed1997

[Foreign body granuloma mimicking bronchial tumor. Aspects in x-ray computed tomography with views by virtual endoscopy].

The aim of this study is to report the spiral CT findings of an endobronchial foreign body (chicken's bone) unknown on the postero-anterior chest radiograph and on the first bronchoscopy. The double originality of this case is the association with endobronchial actinomycosis mimicking a bronchial neoplasm and the utilization of virtual endoscopy by endoluminal 3D reconstruction in this context which has never been reported. The endoluminal 3D reconstruction of the bronchial tree could help guide the endoscopic procedure by better localization of the lesions.

Bronchi↗
PubMed1996

[Failures and complications of bronchial artery embolization].

Bronchial artery embolization (BAE) is well accepted and widely used for management of massive and recurrent hemoptysis. Recurrent hemoptysis occurs in 20% of cases. It may be due to partial embolization, recruitment of other systemic collaterals, recanalization of an embolized artery, or progression of primary disease. Severe complications of BAE are limited to spinal cord injury, oesophageal necrosis, and bronchial ischemia. The proper application of bronchial arteriography and embolization techniques depends on a thorough knowledge of the arterial anatomy, a meticulous catheterization technique, the use of nonionic or lowosmolarity contrast materials, and adequate positioning of the catheter. In these optical conditions of safety, BAE is the treatment of choice for severe and recurrent hemoptysis.

Bronchi↗
PubMed1996

[Retrospective analysis of 44 adrenal puncture biopsies under x-ray computed tomographic guidance].

Fourty-four CT-guided adrenal biopsies were performed on 43 patients aged 12-74 years old (mean 57 years). The results (benign adrenal tissue, malignant tissue, and nondiagnostic) were compared with outcomes. Diagnostic samples were obtained in 86% of patients. Among the 37 proved cases with diagnostic results (10 benign, 27 malignant), there were 26 true-positives, 1 false-negatives and 10 true-negatives. CT-guided adrenal biopsy had an accuracy of 82%, a sensitivity of 96%, a negative predictive value of 83%. In the 6 patients with nondiagnostic samples 1 mass proved malignant and two masses proved benign. Seven minor complications occurred in 7 patients (6 pneumothoraces and 1 retroperitoneal hemorrhage). CT-guided adrenal biopsy is a simple safe and well tolerated technique. In oncologic patients, obtaining benign adrenal tissue was highly predictive of benignity.

Adolescent↗
PubMed1996

[Focal nodular hyperplasia and spontaneous intrahepatic porto-portal communication].

One case of typical focal nodular hyperplasia of the liver on CT but not proven at pathology was associated with a variation of the intrahepatic portal venous system. The absence of the horizontal segment of the left portal vein with portal supply between the anterior segmental branch of the right portal vein and the umbilical portion of the left portal vein was observed. This finding observed is significant for planning liver surgical procedure such hepatic lobectomy as the incision would interrupt the portal supply.

Female↗
PubMedDate not supplied

Motion artifacts of the aorta simulating aortic dissection on spiral CT.

PURPOSE: Motion artifacts of the ascending aorta may impair image quality and simulate an intimal flap or a false channel. The purpose of this study is to evaluate the prevalence, amplitude, and extent of motion artifacts of the aorta in spiral CT and to specify the effects of acquisition and reconstruction parameters on these artifacts. METHOD: One hundred seventy-one thoracic spiral CT examinations were retrospectively analyzed by two reviewers. The analysis sought to determine the presence, location, amplitude, and extent of artifacts of the ascending aorta. RESULTS: Aortic artifacts were detected on spiral CT in 57% of cases. The mean amplitude and mean extent were 4+/-4 and 6+/-7 mm, respectively. Artifacts in the ascending aorta were significantly higher with the 360 degrees linear interpolation (LI) algorithm than with the 180 degrees LI algorithm. CONCLUSION: The prevalence of motion artifacts on spiral CT is higher in this study than the reported prevalence in incremental CT. However, this higher prevalence is significantly reduced when the 180 degrees LI algorithm is used.

Aortic Dissection↗
PubMedDate not supplied

Dual-slice helical CT of the thoracic aorta.

With the advent of helical CT, the capability of noninvasive imaging of the thoracic aorta has been enhanced considerably. In this article, we describe the potential of helical CT using dual-slice technology to evaluate thoracic aortic diseases such dissection, aneurysm, trauma, infection, inflammation, thromboembolic disease, and postoperative complications. Technical considerations for optimal CT imaging as well as limitations of helical CT are highlighted.

Adult↗
PubMedDate not supplied

Volumetric quantification of coronary artery calcifications using dual-slice spiral CT scanner: improved reproducibility of measurements with 180 degrees linear interpolation algorithm.

PURPOSE: The purpose of this work was to determine the reproducibility of coronary total calcium score (TCS) with dual-slice helical CT and compare three acquisition protocols. METHOD: Fifty patients (59 +/- 10 years old) underwent dual-slice helical CT (collimation = 2 x 2.5 mm) and coronary angiography. Two successive scans were performed, resulting in three sets of images: pitch = 1, 360 degrees linear interpolation (LI) (A360); pitch = 1, 180 degrees LI (A180); and pitch = 1.5, 180 degrees LI (B180). TCS values, calculated using a volumetric method with a threshold of 90 HU, were compared, and the interscan variation was determined. Diagnostic performances were compared with receiver operating characteristic curves. RESULTS: Protocol A360 provided significantly lower TCS than protocols A180 and B180 (p < 0.0001). No statistical difference was seen between A180 and B180, which provided the lowest interscan variation (40 +/- 58%). However, no significant clinical impact of the observed interscan variations was found. CONCLUSION: Reproducibility of TCS with dual-slice helical CT is improved by the 180 LI algorithm. However, dual-slice helical CT is not sufficiently reproducible to allow serial quantification of TCS over time.

Adult↗
PubMedDate not supplied

Unusual radiologic findings in the thorax after radiation therapy.

Radiation therapy is used to treat many intrathoracic and chest wall malignancies. A variety of changes may occur after radiation therapy to the thorax. Radiation therapy produces dramatic effects in the lung. Pulmonary necrosis is an uncommon, severe, late complication of adjuvant postoperative radiation therapy. Bronchiolitis obliterans with organizing pneumonia is a distinct clinicopathologic entity characterized by patchy, migratory, peripheral air-space infiltrates. Radiation therapy can also cause spontaneous pneumothorax, mesothelioma, and lung cancer. In the mediastinum, radiation therapy may cause thymic cysts, calcified lymph nodes, and esophageal injuries. Cardiovascular complications of radiation therapy are often delayed and insidious. Premature coronary artery stenosis occurs after radiation therapy to the mediastinum. Radiation therapy may also give rise to calcifications of the ascending aorta, pericardial disease, valvular injuries, and conduction abnormalities. Women who undergo thoracic irradiation before the age of 30 years have a high risk of developing a second breast cancer. Radiation-induced sarcomas are an infrequent but well-recognized complication of radiation therapy. Other chest wall injuries due to radiation therapy are osteochondroma and rib or clavicle fractures. Knowledge of the imaging features of injuries caused by radiation therapy can prevent misinterpretation as recurrent tumor and may facilitate further treatment.

Bone and Bones↗