Biomedical subjects

W M Dinn

Publications and source records attributed to W M Dinn.

7 recordsLinked to original sources

PubMed1978

Computed tomography in genitourinary pathology.

Computed tomography (CT) provides accurate localization of pathologic processes within the abdomen and also frequently contributes information regarding the nature of the process. A review of 50 patients with suspected genitourinary pathology studied with CT suggests that this new noninvasive diagnostic modality can provide increased diagnostic accuracy but that it will not replace conventional abdominal radiography and intravenous urography as the primary screening examination for such patients. Situations in which CT has proved valuable include: (1) evaluation of areas which are relatively "blind" on conventional radiography: anterior and posterior margins of kidneys, paravertebral and midline portions of retroperitoneum, and base of bladder; (2) evaluation of patients with severely compromised function of one or both kidneys, including assessment of amount of functioning renal parenchyma and possible demonstration of cause of obstructive hydronephrosis; (3) evaluation of patients in whom intravenous urography is contraindicated; (4) differentiation of solid from cystic masses of kidney; (5) evaluation of spread of tumor outside boundaries of kidney; and (6) staging of bladder tumors.

Abscess↗

PubMed1977

Computed tomographic scanning in children.

Computed tomographic scanning (CT) has been effectively utilized in evaluating the pediatric patient. Our experience with CT of the chest and abdomen in 19 patients has been described. The advantages offered by CT include: a unique anatomic display, the lack of morbidity, and an acceptable radiation dosage. Few technical disadvantages exist. Further application of this unique technique can be predicted.

Abdominal Neoplasms↗

PubMed1977

Correlation of computed tomography, gray scale ultrasonography, and radionuclide imaging of the liver in detecting space-occupying processes.

The abilities of computed tomography (CT; scanning time=2.7 min), gray scale ultrasonography, and radionuclide imaging to detect and characterize space-occupying processes in the liver were compared. A numerical rating scale which emphasized detection abilities resulted in ultrasonography scoring 3.5 CT 3.2, and radionuclide imaging 2.9. CT resulted in no false positives and 6 false negatives, caused mainly by motion artifacts. The simplest technique, radionuclide imaging, also had the smallest number (2) of false negatives; it is therefore recommended as the screening procedure of choice. Sonography or CT should be done for those patients with a prior suspicious finding.

Carcinoma, Hepatocellular↗

PubMed1977

Isodense masses on CT: differentiation by gray scale ultrasonography.

Alterations in echo patterns enable isodense structures and lesions to be clearly identifiable by gray scale ultrasonography when they are not distinguishable by computed tomography (CT). In certain clinical situations this capability is a distinct advantage of ultrasound over CT. Findings in three cases with abnormalities visualized by ultrasound, but not by CT, are presented. In addition, a cadaver was scanned with CT and ultrasound and then sectioned in corresponding transverse planes for anatomic correlation.

Dysgerminoma↗

PubMed1977

Radionuclide imaging, computed tomography, and gray-scale ultrasonography of the liver: a comparative study.

Transmission computed tomography (CT), gray-scale ultrasonography, and scinitillation-camera imaging were compared for detection of intrahepatic space-occupying processes. Fifty patients with suspected liver disease were studied by the three modalities. In the 35 cases with confirmed abnormalities, the madalities were rated on a scale of 0 to 5 in terms of their detection value; Each modality was found to have definite advantages and disadvantages. The mean score of ultrasound was highest (3.61), followed by nuclear medicine (3.11) and then CT (2.77). The combination of ultrasound and nuclear medicine identified all lesions, whereas CT alone or in combination with another technique occasionally failed to detect abnormal foci. In the future, the relative efficacy of these procedures may change with improved imaging technology and increased interpreter experience.

Carcinoma, Hepatocellular↗

PubMed1976

The radiology of the superior intercostal veins.

The superior intercostal veins define the pleural reflections of the caudad extent of the posterior junction line. They are paired structures which drain the first three intercostal spaces and join the azygous on the right and the accessory hemiazygous on the left. Because of their location posterior and lateral to the esophagus and trachea, their pleural reflections may be altered early in the course of a focal nodal disease of the posterior mediastinum.

Azygos Vein↗

PubMed1976

Intestinal perforation. An infrequent complication of ventriculo-peritoneal shunts.

Bowel perforation by ventriculo-peritoneal shunts occurred in two children with no abdominal symptoms. The diagnosis in each instance was confirmed by opacification of the colon in one child and the small bowel in the other via contrast medium injection of the distal shunt tubing. "Shuntograms" are recommended for all patients with no readily evident cause of dysfunctioning cerebrospinal fluid-peritoneal shunts.

Cerebrospinal Fluid Shunts↗