A5052809885- Digital Radiography and Breast Imaging
- Radiology practices and education
- Radiation Dose and Imaging
- Medical Imaging Techniques and Applications
- AI in cancer detection
- Radiomics and Machine Learning in Medical Imaging
- Digital Imaging in Medicine
- Advanced X-ray and CT Imaging
- Distributed and Parallel Computing Systems
- Congenital Diaphragmatic Hernia Studies
- Prenatal Screening and Diagnostics
- Dental Radiography and Imaging
- Congenital Anomalies and Fetal Surgery
- Teratomas and Epidermoid Cysts
- Medical Image Segmentation Techniques
- Surgical Simulation and Training
- Image Retrieval and Classification Techniques
- Renal cell carcinoma treatment
- Anatomy and Medical Technology
- Advanced Radiotherapy Techniques
- Lung Cancer Diagnosis and Treatment
- Augmented Reality Applications
- Advanced Data Compression Techniques
- Medical Imaging and Pathology Studies
- Spinal Fractures and Fixation Techniques
University of Pennsylvania
2007-2022
Children's Hospital of Philadelphia
2002-2022
Hospital of the University of Pennsylvania
1997-2021
University of Pennsylvania Health System
2001-2011
New York University
1981-2008
Georgetown University
1989-2005
Georgetown University Medical Center
1993-2005
Toshiba (Japan)
2005
Oregon Health & Science University
2002
National Institutes of Health
1997-2000
Six patients were reviewed who had renal angiomyolipoma (1.2-4.0 cm) in which only minimal amounts of fat evident on CT. The content the lesion was appreciated because tissue attenuation measurements small areas low within tumors performed and thin-section (5-mm) nonenhanced CT scans used. lesions could be identified 10-mm sections three cases but 5-mm others. In two cases, seen thin sections. Careful sampling low-density regions mass must a single region interest over entire tumor will...
To improve the ability of ultrasound to distinguish benign from malignant breast lesions, we used quantitative analysis image texture. Eight cancers, 22 cysts, 28 fibroadenomata, and fibrocystic nodules were studied. The true nature each lesion was determined by aspiration (for some cysts) or open biopsy. Analysis texture performed on digitized video output scanner using fractal statistical methods. most useful features those derived co-occurrence matrices images. Using two together...
In 1982, the American College of Radiology (ACR) and National Electrical Manufacturers Association (NEMA) formed a committee to develop standards for interconnection digital imaging devices. Version 1.0 standard, published in 1985, specifies hardware interface supporting point-to-point (not network) image transmission, data dictionary (a set rules encoding information), commands initiate transactions. 2.0, 1988, also addresses transmission provides semantic by which messages (streams bits...
The purpose of the study was to develop quantitative and qualitative criteria for diagnosing fatty liver on contrast-enhanced helical CT.Differential liver-spleen attenuation evaluated between 80 120 sec after injection in 76 patients who underwent CT. Unenhanced CT images had earlier established when minus spleen difference less than or equal -10 H (n = 18). Four observers not seen unenhanced used assess presence a five-point Likert scale, geographic areas spared from infiltration, relative...
The sonographic detection of echogenic, soft-tissue mass within the veins lower extremities assures diagnosis deep venous thrombosis (DVT). However, remains inconclusive when fresh thrombus and/or artifacts are present lumen vein. study attempts to augment clinical utility real-time sonography in DVT, based on premise that total obliteration vein by probe compression should not be possible presence thrombi. Sonography and contrast venography extremity were performed 20 patients with...
Four histopathological indices of malignancy--cellularity, pleomorphism, vascularity, and necrosis--were correlated with the positive-contrast CT scan in 84 patients pathologically proved astrocytoma. Vascularity necrosis best supratentorial tumors, while vascularity cellularity significantly cerebellar astrocytomas. These findings indicate that degree malignancy a astrocytoma can be inferred from contrast-enhanced scan, but this is not generally possible posterior fossa tumors.
To test the reliability of established ultrasound (US) parameters in predicting outcome first-trimester pregnancy.The authors retrospectively reviewed 2,655 US scans 2,285 patients. Parameters tested against were (a) a yolk sac and mean gestational diameter 8 mm on transvaginal scans, (b) an embryo 16 (c) difference between crown-rump length less than 5 (oligohydramnios) at 5.5-9.0 weeks gestation.Thirty (22%) 135 patients without sacs with 8-mm developed live embryos: 24 had normal...
The purpose of this study is to report the sonographic appearance focal thyroid nodules that prove be lymphocytic thyroiditis on fine-needle aspiration.In a patient population undergoing sonography for palpable nodular disease without known thyroiditis, had wide variety appearances. They most commonly appeared as solid hyperechoic with ill-defined margins. However, echogenicity was variable, and calcification cystic-appearing regions were also noted. vascularity these assessed color Doppler...
To report the ultrasound (US) features in prenatal cases of suspected congenital pulmonary airway malformation or unspecified lung lesions with a final surgical pathologic diagnosis lobar overinflation (CLO).Institutional Review Board-approved radiology and clinical database searches from 2001 to 2017 were performed for prenatally diagnosed CLO. All patients had detailed US examinations addition magnetic resonance imaging (MRI). Size, echotexture, vascularity assessed US, signal MRI....
Carcinoma adherent to the carotid artery may be present in advanced head and neck cancers. Angiography, ultrasound, computerized tomography (CT), magnetic resonance imaging (MRI) are available for preoperative evaluation of artery. This study demonstrates that CT is not accurate demonstrating malignant invasion Ultrasonography appears best modality assessing invasion. Magnetic prove helpful this determination.
Lymphatic malformations are benign lesions that result from abnormal development of the lymphatic and venous systems. These may be detected during routine prenatal ultrasound screening, typically demonstrate imaging findings a multiseptate cystic lesion lacking solid components, vascularity, calcifications. We report 73 cases prenatally describe greater variability in their sonographic appearance than previously reported, including purely mixed with Appreciation this increased is important...
Our goal was to determine if normal and abnormal pregnancies could be distinguished at smaller sac sizes with a higher frequency transvaginal transducer than 5-MHz transducer.Thirty-nine patients potentially identified were immediately reimaged 9-5-MHz transducer. We compared our ability visualize the yolk sac, embryo, cardiac activity relative mean diameter on imaging both frequencies in women pregnancies.Of 39 pregnancies, 22 (56%) or probably normal. Using transducer, first seen 6.4-mm...