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Your search keyword '"BABYN, P. S."' showing total 159 results
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159 results on '"BABYN, P. S."'

22. Severe acute respiratory syndrome (SARS): chest radiographic features in children

Author

Babyn, Paul S., Chu, Winnie C. W., Tsou, Ian Y. Y., Wansaicheong, Gervais K. L., Allen, Upton, Bitnun, Ari, Chee, Thomas S. G., Cheng, Frankie W. T., Chiu, Man-Chun, Fok, Tai-Fai, Hon, Ellis K. L., Gahunia, Harpal K., Kaw, Gregory J. L., Khong, Pek L., Leung, Chi-Wai, Li, Albert M., Manson, David, Metreweli, Constantine, Ng, Pak-Cheung, Read, Stanley, and Stringer, David A.

Published
2004
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24. Deep learning-based age estimation from chest CT scans

Author

Azarfar, Ghazal, Ko, Seok-Bum, Adams, Scott J., and Babyn, Paul S.

Abstract

Purpose: Medical imaging can be used to estimate a patient’s biological age, which may provide complementary information to clinicians compared to chronological age. In this study, we aimed to develop a method to estimate a patient’s age based on their chest CT scan. Additionally, we investigated whether chest CT estimated age is a more accurate predictor of lung cancer risk compared to chronological age. Methods: To develop our age prediction model, we utilized composite CT images and Inception-ResNet-v2. The model was trained, validated, and tested on 13,824 chest CT scans from the National Lung Screening Trial, with 91% for training, 5% for validation, and 4% for testing. Additionally, we independently tested the model on 1849 CT scans collected locally. To assess chest CT estimated age as a risk factor for lung cancer, we computed the relative lung cancer risk between two groups. Group 1 consisted of individuals assigned a CT age older than their chronological age, while Group 2 comprised those assigned a CT age younger than their chronological age. Results: Our analysis revealed a mean absolute error of 1.84 years and a Pearson’s correlation coefficient of 0.97 for our local data when comparing chronological age with the estimated CT age. The model showed the most activation in the area associated with the lungs during age estimation. The relative risk for lung cancer was 1.82 (95% confidence interval, 1.65–2.02) for individuals assigned a CT age older than their chronological age compared to those assigned a CT age younger than their chronological age. Conclusion: Findings suggest that chest CT age captures some aspects of biological aging and may be a more accurate predictor of lung cancer risk than chronological age. Future studies with larger and more diverse patients are required for the generalization of the interpretations.

Published
2023
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45. Primary meningeal tumors in children: correlation of clinical and CT findings with histologic type and prognosis

Author

Hope, J K, Armstrong, D A, Babyn, P S, Humphreys, R R, Harwood-Nash, D C, Chuang, S H, and Marks, P V

Subjects
Adolescent, Infant, Sarcoma, Prognosis, nervous system diseases, Child, Preschool, otorhinolaryngologic diseases, Journal Article, Meningeal Neoplasms, Humans, Child, Meningioma, Tomography, X-Ray Computed, neoplasms, Melanoma
Abstract

PURPOSE: To identify the radiologic features that might help in preoperative differentiation of the meningiomas from the remaining primary meningeal tumors, in particular the malignant tumors. METHODS: The clinical and computed tomographic features of 21 children with histologically proved primary meningeal tumors were analyzed. FINDINGS: Benign tumors (meningiomas) are more likely to occur in older children, to have longer symptom duration, and to have CT appearances similar to the "typical" adult meningioma. Atypical CT features suggest a malignant meningeal tumor, such as meningeal sarcoma, melanoma, or meningeal primitive neuroectodermal tumor. The recent identification of a new subtype of meningioma (a "sclerosing" group) is discussed. This is common in children and the CT and clinical features are similar to those seen in other meningiomas. It is frequently mistaken histologically for an intraaxial tumor, or for an atypical or malignant meningioma. These sclerosing meningiomas may also show brain invasion but despite this, in the short term, the prognosis is no different from other meningiomas. CONCLUSION: The bad reputation previously ascribed to childhood primary meningeal tumors should be confined to that small group that are malignant. Meningiomas have a more favorable outlook.

Published
1992

46. Liver MR Imaging in Children: Current Concepts and Technique

Author

Chavhan, Govind B., Shelmerdine, Susan, Jhaveri, Kartik, and Babyn, Paul S.

Abstract

Key concepts in pediatric liver MR imaging are discussed, including the pertinent anatomy and vascular supply of the liver; technical aspects of MR imaging, including sedation, radiofrequency coils, sequences, dynamic imaging, contrast media, and diffusion-weighted imaging; and principles of interpretation related to focal liver lesions.

Published
2016
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49. The early plasma concentration of 51Cr-EDTA in patients with cirrhosis and ascites

Author

Wanasundara, Surajith N., Wesolowski, Michal J., Puetter, Richard C., Burniston, Maria T., Xirouchakis, Elias, Giamalis, Ioannis G., Babyn, Paul S., and Wesolowski, Carl A.

Abstract

The aim of the study was to determine which of three two-parameter fitting functions (exponential, linear-log, and negative-power function of time) most accurately models early chromium-51-EDTA (51Cr-EDTA) plasma concentration data prior to 120 min in patients with cirrhosis and ascites and understand how these fitting functions affect the calculation of the area under the plasma concentration curve (AUC).

Published
2015
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50. Pediatric radiology.

Author

Kushner, D C, primary, Siegel, M J, additional, Ball, W S, additional, Sty, J R, additional, Cleveland, R H, additional, Babyn, P S, additional, and Rosenfield, N S, additional

Published
1995
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