Badawi Lab - UC Davis
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1 News 68 Publications 10 Members

Use of positron emission tomography in oncology and its potential role to assess response to imatinib mesylate therapy i...

Van Den Abbeele, Ad Ramsey D. Badawi

Published in European Journal of Cancer

The reliability of established anatomical imaging techniques, such as computed tomography (CT) and magnetic resonance imaging (MRI), is compromised in following response to certain types of treatment if metabolic improvement occurs before morphologic change is apparent. Thus, traditional imaging techniques cannot discriminate early tumor response b...

Performance and limitations of positron emission tomography (PET) scanners for imaging very low activity sources.

Freedenberg, Mi Ramsey D. Badawi Tarantal, Af Cherry, Sr

Published in Physica Medica

Emerging applications for positron emission tomography (PET) may require the ability to image very low activity source distributions in the body. The performance of clinical PET scanners in the regime where activity in the field of view is <1 MBq has not previously been explored. In this study, we compared the counting rate performance of two clini...

Positron emission tomography in male violent offenders with schizophrenia.

Wong, Mt Fenwick, Pb Lumsden, J Fenton, Gw Maisey, Mn Lewis, P Ramsey D. Badawi

Published in Psychiatry Research

The FDG PET brain scans from 31 offenders with schizophrenia and schizoaffective disorder from a maximum security mental hospital were compared with those of normal controls (N = 6) in terms of relative FDG uptake in a range of regions covering frontal and temporal regions. The patient sample was divided into those who had a history of repetitive v...

Nontyphoidal salmonella pericarditis: a case of Salmonella typhimurium phage type 2 pericarditis.

Ramsey D. Badawi Nageh, T Walker, D Wray, R

Published in International Journal of Cardiology

Radiation risks to personnel and public during the treatment of malignant glioma using interstitial brachytherapy.

Baldock, C Hughes, Sw Sofat, A Batchelor, S Ramsey D. Badawi

Published in British Journal of Radiology

125I seeds are used in brachytherapy for the treatment of malignant gliomas. The use of such radioactive sources is associated with a certain radiological hazard to both personnel and members of the public. This hazard should be quantified so that the ALARA principle of radiological protection may be implemented satisfactorily. A study was undertak...

Optimization of noise-equivalent count rates in 3D PET.

Ramsey D. Badawi Marsden, Pk Cronin, Bf Sutcliffe, Jl Maisey, Mn

Published in Physics in Medicine and Biology

We have used noise-equivalent count (NEC) rates to optimize count rate performance for 3D acquisition in PET in a wide range of situations, with particular reference to imaging of the torso. We have also compared NEC performance for 2D and 3D acquisition in order to establish the conditions under which 3D mode offers an improvement over 2D mode. Me...

A technique for hemostasis and closure after percutaneous aortic valve replacement.

Ramsey D. Badawi

Published in Catheterization and Cardiovascular Interventions

Access closure is the key to successful retrograde percutaneous aortic valve replacement. It requires large-bore femoral arterial access (18-28F) which most operators manage with surgical access and closure under general anesthesia. We report a case example of how, using our center s peripheral interventional experience, we have developed a techniq...

Excitation spectroscopy in multispectral optical fluorescence tomography: methodology, feasibility and computer simulati...

Abhijit Chaudhari Ahn, S Levenson, R Ramsey D. Badawi Cherry, Sr Leahy, Rm

Published in Physics in Medicine and Biology

Molecular probes used for in vivo optical fluorescence tomography (OFT) studies in small animals are typically chosen such that their emission spectra lie in the 680-850 nm wavelength range. This is because tissue attenuation in this spectral band is relatively low, allowing optical photons even from deep sites in tissue to reach the animal surface...

Non-rigid registration of serial dedicated breast CT, longitudinal dedicated breast CT and PET/CT images using the diffe...

Jonathan Santos Abhijit Chaudhari Joshi, Aa Andrea Ferrero Yang, K Boone, Jm Ramsey D. Badawi

Published in Physica Medica

Epidemiology and outcome of Crohn s disease in a teaching hospital in Riyadh.

Al-Ghamdi, As Al-Mofleh, Ia Al-Rashed, Rs Al-Amri, Sm Aljebreen, Am Isnani, Ac El-Badawi, R

Published in World Journal of Gastroenterology

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