Search PubMed⌕ Search

Biomedical subjects

B G Coleman

Publications and source records attributed to B G Coleman.

86 records · Page 5Linked to original sources
PubMed1979

Nonuniform attenuation in computed tomography study of the cirrhotic liver.

Diffuse hepatocellular processes are not well imaged by most radiologic modalities. At present, CT has not added significantly to the evaluation of hepatocellular disease, particularly in the cirrhotic liver. The CT patterns of cirrhosis previously described are reviewed, and the pathophysiology of cirrhosis is discussed. In 3 cases, a pattern was seen in cirrhotic livers characterized by nonuniform attenuation with varied response to administration of intravenous contrast agents. With further evaluation of fatty infiltration and cirrhosis, CT may prove helpful in understanding these disease processes.

Contrast Media↗
PubMed1979

Endometriosis: clinical and ultrasonic correlation.

Thirteen patients with surgically proven endometriosis underwent ultrasonography as part of their diagnostic evaluation. An attempt was made to assess the sonographic characteristics of endometriosis to determine if a characteristic pattern would emerge when the clinical presentations and physical findings were coupled with the ultrasonic picture. Ultrasound showed pelvic masses in all patients. Most masses appeared spherical and separate from the uterus and were cystic or predominantly cystic with scattered peripheral echoes. This retrospective study suggests a more useful role for ultrasound than previously recognized in the clinical management of patients with endometriosis.

Adult↗
PubMed1979

Fibrous lesions in the lower extremities in neurofibromatosis.

Multiple fibrous lesions have been noted in the lower extremities of patients with neurofibromatosis (Recklinghausen's disease). These lesions are probably a combination of fibrous cortical defects, nonossifying fibromas, and intraosseous neurofibromas. When several fibrocystic lesions frequent the knee areas in an adolescent, neurofibromatosis should be suspected.

Adolescent↗
PubMedDate not supplied

Intrauterine low density in women over 50. Assessment of significance and recommendations for follow-up.

Patients over 50 years old with intrauterine low density on enhanced computed tomography were analyzed. Uterine volume and volume of intrauterine low density were calculated. Intrauterine low density was expressed as a percent of uterine volume. At 1-year follow-up, 23 (63.9%) had uterine malignancy and 13 (36.2%) had benign findings. All patients whose intrauterine low density exceeded 35% of the total uterine volume had a malignancy (p < 0.001). If intrauterine low density exceeds 35% of uterine volume, evaluation of uterine malignancy should be performed regardless of symptoms.

Aged↗
PubMedDate not supplied

Comparison of resistive index versus pulsatility index in assessing the benign etiology of adnexal masses.

Retrospective analysis of pelvic sonograms with colorguided spectral Doppler evaluation of 189 adnexal masses yielded four malignancies, 20 benign neoplasms, 32 cysts, and 14 endometriomas. Fifty-eight masses were presumed benign on additional imaging. Pulsatility index (PI) < 1.0 was seen in 70% neoplasms, 63% benign cysts and 50% endometriomas. Thirteen percent of benign cysts and no neoplasms had resistive index (RI) < 0.4. Fifty percent malignancies had PI < 1.0. None had RI < 0.4. Both thresholds lack sufficient sensitivity and specificity for distinguishing benign and malignant lesions.

Adolescent↗
PubMedDate not supplied

Sonography of transjugular intrahepatic portosystemic shunts: detection of elevated portosystemic gradients and loss of shunt function.

PURPOSE: To evaluate the role of ultrasound (US) in the detection of elevated portosystemic gradients and loss of shunt function in patients with a transjugular intrahepatic portosystemic shunt (TIPS). MATERIALS AND METHODS: The authors' prospectively compared 151 Doppler hepatic sonograms with follow-up portal venograms in 64 patients with TIPS. Sonographic data from within the portal system, hepatic arteries, and three areas within the TIPS were collected. Statistical analysis of these parameters was used to establish the US criteria for shunt dysfunction. RESULTS: Midshunt velocity thresholds of less than 50 and less than 60 cm/sec yielded sensitivities and specificities of 46% and 93%, and 57% and 89%, respectively, for the detection of portosystemic gradients exceeding 15 mm Hg. Use of a threshold midshunt velocity of less than 60 cm/sec or main portal vein velocity of less than 40 cm/sec raised the shunt dysfunction detection sensitivity to 86%, with a specificity of 54%. CONCLUSION: Doppler US is an effective noninvasive screening tool for detecting elevated portosystemic gradients and evaluating the functional status of a TIPS. Midshunt velocities of less than 60 cm/sec or main portal vein velocities less than 40 cm/sec are a useful threshold for detecting shunt dysfunction.

Adult↗
PubMedDate not supplied

CT demonstration of pulmonary effects of tangential beam radiation.

Breast cancer is sometimes treated with an excisional biopsy and a radiation portal limited to the breast and the adjacent chest wall, especially in patients with negative lymph node dissections. The beam passes through this portion of the chest wall tangentially. Such radiation can result in changes in the included lung parenchyma that are pleural-based and sharply demarcated from the normal lung on CT lung windows. In our experience CT lung windows were more sensitive than chest radiography in showing these changes. Such changes must be recognized and differentiated from pleural metastases. Computed tomography also resulted in a more specific diagnosis than chest radiography because it better localized the abnormality to the radiation portal.

Adult↗
PubMedDate not supplied

CT diagnosis of villous adenoma.

Villous adenoma may have a specific appearance on barium enema examination but specific CT findings of villous adenoma have not been previously described. Two recently encountered cases of villous adenoma in the rectum had a distinctive pattern on CT. Suggested criteria for CT diagnosis of villous adenoma include a homogeneous water density component of less than 10 HU, occupying more than half the lesion and eccentric on the luminal side of the mass. This low density component interfaces with the majority of the luminal surface of the lesion. No air-fluid level is seen and the lesion should not have a round cystic configuration. A description of these findings is illustrated and discussed.

Adenoma↗