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Biomedical subjects

B Raval

Publications and source records attributed to B Raval.

51 records · Page 3Linked to original sources
PubMed1980

Progressive massive fibrosis developing after brief coal dust exposure: evaluation with CT scanning and radionuclide angiocardiography.

Two patients are described who developed progressive massive fibrosis (PMF) after exposure to coal dust for only four and seven years, respectively, in Belgian coal mines in the post-war period. It seems likely from consideration of epidemiological data that these men were exposed to massive concentrations of coal dust during their time in the mines. In one patient in a computerized tomography scan clearly showed the extent of the PMF and brought out the degree of calcification in the center of the masses. Radionuclide angiocardiographic evaluation showed depressed right ventricular function which is probably a result of pulmonary hypertension, and also showed marked distortion of the pulmonary vascular bed. It is believed that these are the first reported instances of CT scanning and radionuclide angiocardiography in this condition.

Coal Mining↗
PubMed1979

The spectrum of liver disease on CT.

Computed tomography (CT) is a useful imaging modality in a variety of liver diseases. The roles of radionuclide liver scanning, ultrasound and CT in liver disease are discussed and characteristic CT findings of cystic disease, trauma, abscess, primary and metastatic malignancy, fatty infiltration, hemochromatosis, and obstructive jaundice are illustrated.

Adolescent↗
PubMedDate not supplied

Fast magnetic resonance in vascular diseases of the abdomen.

Fast magnetic resonance (MR) imaging provides a consistent and predictable appearance of vascular abnormalities as shown by four patients with thrombi, dissection and aneurysm. Fast MR images are obtained during breath-holding, resulting in an absence of respiratory motion artifacts. The time of MR study is much less with fast MR than with spin echo sequences.

Abdomen↗
PubMedDate not supplied

Feasibility of fast MR imaging of the liver at 1.5 T.

A phantom with T1 and T2 relaxation times encompassing normal liver and liver lesions was constructed to evaluate fast magnetic resonance pulse sequences using TR from 21-100 milliseconds, TE 12-60 milliseconds and flip angles from 5 degrees-90 degrees. Ten of these fast MR sequences were then selected and compared with conventional spin-echo sequences in normal volunteers (n = 3) and in patients with liver lesions (n = 6). Subjectively, the fast MR sequences eliminated motion artefacts. Objectively, 8 of 10 fast sequences had signal-to-noise ratios comparable to spin-echo imaging whereas only 2 of 10 had contrast-to-noise ratios that were similar to spin-echo imaging. This preliminary study, performed at 1.5 Tesla, does not show any clear-cut advantage of fast imaging over spin-echo imaging in the detection of liver lesions. The use of a liver tissue equivalent phantom provides a rapid, practical approach in evaluation of fast scans.

Humans↗
PubMedDate not supplied

Leiomyoma involving the gastrocolic ligament: CT demonstration.

A case of a large leiomyoma involving both the transverse colon and the greater curvature of the stomach is presented. Computed tomography (CT) demonstrated contiguous extension of the mass along the gastrocolic ligament. Although similar findings have been described in colonic and gastric carcinoma and in omental metastases, this is the first report in which these findings were due to a leiomyoma.

Adult↗
PubMedDate not supplied

Spontaneous necrosis and hemorrhage in an enlarged accessory spleen: CT demonstration.

Enlargement of an accessory spleen following splenectomy may be due to compensatory hypertrophy or recurrence of hematologic or other disorders. Spontaneous necrosis and hemorrhage in an accessory spleen are rarely described. We report a case in which an enlarged accessory spleen complicated by spontaneous hemorrhage was identified on computed tomography (CT) and confirmed at surgery.

Adult↗
PubMedDate not supplied

Intrathoracic stomach. Another cause of IVC pseudothrombosis.

We report the case of a patient with a large hiatal hernia accompanied by partial gastric volvulus in whom the computed tomography (CT) findings mimic the appearances of thrombus in the inferior vena cava (IVC). To our knowledge, this has not been previously reported as a cause of "pseudothrombosis" of the IVC on CT.

Aged↗
PubMedDate not supplied

Computed tomography of vaginitis emphysematosa.

Vaginitis emphysematosa is characterized by multiple gas-filled spaces in the vagina and exocervix. Although the diagnosis can be made on physical examination and on plain radiography, it is important to recognize its appearance on CT since it may constitute a serendipitous finding that should be differentiated from more serious diseases that have a similar appearance.

Adult↗