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Biomedical subjects

H C Yeh

Publications and source records attributed to H C Yeh.

At least 91 records · Page 5Linked to original sources
PubMed1981

Ultrasonography and computed tomography of gastric wall lesions.

The ultrasonographic features of gastric wall lesions were studied in 40 patients and correlated with the CT findings in 14. Features diagnostic of tumor included (a) an infiltrative lesion causing thickening of the gastric wall, which can be localized or diffuse and smooth or irregular; (b) a globular mass, nodular or irregular, poorly or irregularly echogenic or containing a necrotic cavity; and (c) a combination of both, resulting in a rather complicated configuration. Gastritis and gastric ulcers also cause thickening of the gastric wall, but to a lesser extent.

Carcinoma↗
PubMed1981

Diagnosis of popliteal cyst: double-contrast arthrography and sonography.

One hundred consecutive patients who had trauma to the knee were examined by sonography and double-contrast arthrography to evaluate the presence or absence of popliteal cyst. In 58 cases both tests were negative, while in 15 both were positive. Each of those 15 patients had pain and/or a palpable mass behind the knee. In 27 remaining patients the arthrogram demonstrated a popliteal cyst that was not detected on the sonogram. None of the 27 patients complained of pain in the popliteal fossa or had a palpable mass in the area. The sonographic findings, however, showed good correlation with these clinical symptoms. This paper attempts to analyze these discrepancies and to evaluate the advantages and disadvantages of each method.

Diatrizoate Meglumine↗
PubMed1981

Prenatal genetic diagnosis in a triplet gestation.

The increasing incidence of multiple gestations and the need for genetic diagnosis often pose a question as to the safety of amniocentesis in these cases. Under careful sonographic control and using indigo carmine as a marker, a technique for amniocentesis in a triplet gestation is presented.

Amniocentesis↗
PubMed1980

Ultrasonography and computed tomography of peritoneal mesothelioma.

Eleven patients with malignant peritoneal mesothelioma were examined with ultrasonography. Four of them were also examined with computed tomography (CT). A sheetlike mass was seen in seven patients and a localized irregular mass was seen in four. No nodular or globular masses were seen. Ascites was present in all patients except one, and an omental mass in addition to a peritoneal mass was found in two. Extremely rapid progression of mesothelioma occurred in one patient, and disappearance of mesothelioma and ascites occurred in another. Ultrasonography was, in general, superior to CT in demonstrating peritoneal masses, especially in the presence of ascites.

Adult↗
PubMed1980

Sonography of the adrenal glands: normal glands and small masses.

To evaluate sonographic imaging of the normal adrenal glands, anterior transverse and longitudinal scans were made on 200 patients who had no evidence of adrenal disease. In 78 additional patients who were suspected of having adrenal masses, anterior and posterior transverse and longitudinal scanning and longitudinal oblique scanning were done. Anterior transverse scanning proved to be the best single method of scanning the adrenal gland and small adrenal masses. The normal adrenal gland which is 3-6 mm thick and adrenal masses as small as 1.3 cm can be delineated. Although the frequency of visualizing normal adrenal glands (78.5% on the right and 44% on the left) with sonography is not as high as with CT, masses are more readily detected than the normal glands. The accuracy for detecting adrenal masses is very high, with a false-negative rate of only 3%. Sonography can be a useful screening test for many patients who are suspected of having adrenal masses. However, for obese patients the image is degraded and a higher false-positive rate (3.5%) is obtained. CT provides better resolution for such patients.

Adenoma↗
PubMed1980

Ultrasonography and computed tomography of the liver.

Both CT scanning and ultrasonography are diagnostic modalities of choice for the evaluation of the liver. The physical principles of these studies differ and, therefore, so do the techniques used and the information provided. A comparison of the results obtained from each of them in the investigation of such processes as jaundice, tumors, hematomas, and diffuse parenchymal disease is offered.

Biopsy↗
PubMed1979

Ultrasound diagnosis of ectopic ureterocele.

Three children with ectopic ureteroceles were examined with ultrasound, intravenous urography and cystography. In all cases the ultrasound studies outlined the ectopic ureterocele within the fluid-filled bladder and in one case added additional information regarding the non-functional portion of the duplication and its ureter.

Adolescent↗
PubMed1979

Anatomic models of the tracheobronchial and pulmonary regions of the rat.

Models of the lung airways of a rat were developed from complete measurements of the tracheobronchial airways. A silicone rubber cast of the tracheobronchial airways of a rat lung was prepared and all individual airway segments down to and including the terminal bronchioles were measured to obtain the segment diameters, lengths, branching angles and angles of inclination to gravity. Models of the rat tracheobronchial airways were constructed based on the original measurements and the subsequent analysis. Some mathematical assumptions about acinar anatomy distal to terminal bronchioles were made to extend the models to include pulmonary regions. Emphasis was placed on the "Typical Path Lung Model" which used one typical pathway to represent either a whole lung or a lobe of the lung. The models are simple and can be applied in calculation of physiologic variables or particle deposition during inhalation in various lobes of the lung.

Animals↗
PubMed1979

Ultrasonography of the brachiocephalic arteries.

Sixteen patients with various lesions involving the brachiocephalic arteries were studied ultrasonographically. The examination was very useful in diagnosing aneurysms of the peripheral arteries and in differentiating an aneurysm from other causes of palpable pulsatile masses, such as a tortuous artery and tumor beneath an artery. The ultrasound technique used for evaluation of these lesions is described.

Adult↗
PubMed1979

Ultrasonography and computed tomography of carcinoma of the gallbladder.

Ultrasonography and CT have been used to diagnose carcinoma of the gallbladder, since in most patients the diagnosis cannot be made through radiography alone. Ultrasonography was performed on 14 patients and CT on 7. Ultrasonographic findings are classified into four types. Frequently, there are gallstones, dilated bile ducts, or metastatic lesions in the liver or retroperitoneal lymph nodes. The diagnosis was made or suggested by ultrasonography in 84.6% of patients. Findings on CT correlated well with the ultrasonographic features.

Adult↗
PubMed1979

Ultrasonography of peritoneal tumors.

Peritoneal masses arising from different types of primary carcinoma were studied ultrasonographically in 34 patients as well as with computed tomography in 3 patients. In shape, the masses were nodular, mantle- or sheetlike, or irregular. The peritoneal line was usually obliterated unless the mass was very small. When a considerable amount of ascites was present, peritoneal implants as small as 2-3 mm could be delineated.

Humans↗