Preliminary results from a Monte Carlo study of breast tumour imaging with low-energy high-resolution collimator and a modified uniformly-redundant array-coded aperture

Alnafea, Mohammed; Wells, Kevin; Spyrou, N. M.; Saripan, M. Iqbal; Guy, Matthew; Hinton, Paul

doi:10.1016/j.nima.2006.01.124

Cited by 20 publications

(15 citation statements)

References 8 publications

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“…Thus, all the major physics aspects of the imaging system are considered. Further details of the MCS are available in [4] and references therein.…”

Section: A Monte Carlo Simulation Methodsmentioning

confidence: 99%

“…As an alternative approach to dedicated instrumentation development [1][2][3], we have been investigating [4,5] the application of a Modified Uniformly Redundant Array (MURA) planar Coded Aperture (CA), instead of using a collimator, coupled to standard clinical gamma camera for breast tumour imaging. This is particularly attractive at General/County Hospital level, where the cost of running an additional dedicated imaging system may be prohibitive.…”

Section: Introductionmentioning

confidence: 99%

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Near Field Corrections for Coded Aperture Imaging in Scintimammography

Alnafea

Wells

Guy

et al. 2006

2006 IEEE Nuclear Science Symposium Conference Record

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Abstract-In this work we study the form of artifacts arising with near-field imaging geometries associated with using coded apertures for Scintimammography (SM) using a combination of Monte Carlo Simulation (MCS), Pseudo-Ray Tracing (PRT) and a new, but simple approach called binary mask shift. The latter method predicted the shape artifacts that are due to off-axis sources and finite size of the object but ignores the effect of varying the angle of incidence of the gamma-rays. The background artifact pattern produced by uniform 2D and 3D source objects of different sizes using a PRT method compared with the corresponding data obtained with MCS suggest that both methods produce striking similarities. From these results we are encouraged to believe that the so-called near field distortion observed with distributed planar and 3D sources, as might be found in SM using coded apertures, can be easily predicted and corrected.

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“…Thus, all the major physics aspects of the imaging system are considered. Further details of the MCS are available in [4] and references therein.…”

Section: A Monte Carlo Simulation Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Near Field Corrections for Coded Aperture Imaging in Scintimammography

Alnafea

Wells

Guy

et al. 2006

2006 IEEE Nuclear Science Symposium Conference Record

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“…Thus, it appears to be well matched to the imaging objectives in SM. While related prior work has also considered, this approach is characterized by gross simpliications in terms of clinical reality [53,54].…”

Section: Summary Of the Role Of Diferent Imaging Modalitiesmentioning

confidence: 99%

Detection and Diagnosis of Breast Diseases

Alnafea¹

2018

Breast Imaging

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Cancer is a disease that starts in a localized organ or tissue and then grows out of control. Breast cancer is an important health problem as in the Western world; it is the second most frequent cause of cancer death in women (after lung cancer). The incidence rate, however, rises dramatically over the age of 50 years. This is may be due to several risk factors, such as family history, genetics, early menstruation, late menopause, and other factors, that have not yet been identiied. The problems of breast diseases have prompted global governments to put constant eforts to increase patient's recovery level against this disease. Early and accurate detection with mass screening programs helps improves a woman's chances for successful treatment. It also minimizes pain, sufering, and anxiety that surround patients and their families. The current and the most cost-efective technique used for screening and diagnosis of breast cancer is X-ray mammography. It is the state-of-the-art for earlier detection to improve both prognosis and survival rate. This is may be due to its good availability, high sensitivity, and relatively low cost/patient. The goal of this chapter is to introduce the problems caused by breast cancer. Starting with an overview of the requirement for breast tumor imaging and the diagnostic techniques used for breast cancer assessment are briely described, highlighting the advantages and disadvantages of each technique. In addition, the problems associated with a relatively new functional breast imaging technique namely scintimammography were introduced and discussed. The intention that the chapter provide the reader with suicient background on the available diagnostic techniques of breast tumor imaging approach, as well as an overview of the literature.

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“…We previously presented a report on the validation of this MCNP5 code and also algorithm developed in this study (Musarudin et al, 2013). In addition, MCNP5 code also had been used previously for single photon emission computed tomography and gamma camera modeling (Alnafea et al, 2006;Saripan et al, 2007Saripan et al, , 2009Saad et al, 2011;Roslan et al, 2010).…”

Section: Image Reconstructionmentioning

confidence: 99%