Research Papers/Topics in Medical Physics

Estimation Of Contralateral Breast Dose For Tangential Breast Irradiation Using Gafchromic Film Ebt2

ABSTRACT The dose to the contralateral breast for tangential breast irradiation has been estimated using Gafchromic films EBT2. The data collected consisted of measurements taken with anthropomorphic female Rando phantom. The EBT2 films were scanned and read using ScanMaker 9800XL plus and ImageJ software. A calibration curve was constructed using fourth – order polynomial fit to the data and a calibration equation was obtained from the graph which was used to convert the grey values ...

Quality Control And Dosimetry Of A Wooden Couch Top For Megavoltage External Beam Radiotherapy.

ABSTRACT  The purpose of this study was to determine an appropriate locally fabricated wood sample that could be used to replace the wire mesh incorporated at the treatment area of EBRT couch top to circumvent dose discrepancies associated with the sagging effect of the wire mesh as a result of prolonged use. Linear attenuation coefficient and transmission factor were determined at three stipulated field sizes (5cm x 5cm, 10cm x 10cm,15cm x 15cm) and two treatment depths of 0.5...

The Effects Of Crystalloid Solutions On The Human Blood Coagulation System

ABSTRACT Crystalloid solutions are used in clinical practice for resuscitation and correction of electrolyte imbalances. However, up to 25% of individuals may develop dysfunctions of haemostasis following fluid infusions, complicating resuscitation and outcome. Studies on the effects of crystalloids solutions on human blood coagulation have produced conflicting results: either suggesting procoagulant effects or impaired coagulation. The mechanisms for these discrepant results remain unc...

Assessment Of Mean Glandular Dose To Patients From Digital Mammography Systems

ABSTRACT Mean glandular dose assessment of patients undergoing digital mammography examination has been done. A total of 297 patient data was used for the study. Basic Quality Control tests were done to ascertain the performance of the equipment used. The results of Quality Control tests indicated that the three Mammography units used for this study were functioning within the internationally acceptable performance criteria. Patients with a breast thickness of 30 mm within the two age g...

Comparison Of Treatment Indices Between Telecobalt Machine And Linear Accelerator-Based Treatment Plans For Selected Conformal Radiotherapy Cases

ABSTRACT The use of telecobalt machine in radiotherapy is of concern in developing countries where there is a limited resource. As such, the study was to ascertain if telecobalt (cobalt60) machine could be feasible to generate and deliver treatment plans with optimal treatment indices comparable to those of a linear accelerator (Linac). Retrospective DICOM-Radiotherapy images of patients earmarked for treatment of breast, prostate and lung cancer obtained from the European Society for Ra...

Neutron Capture Throw Interaction Neutron with Material

Abstract :-neutron capture, type of nuclear reaction in which a targetnucleus absorbs a neutron (uncharged particle), thenemits a discrete quantity of electromagnetic energy(gamma-ray photon). The target nucleus and the productnucleus are isotopes, or forms of the same element. Thusphosphorus-31, on undergoing neutron capture, becomesphosphorus-32. The heavier isotope that results may beradioactive, so that neutron capture, which occurs withalmost any nucleus, is a common way of pro...

Verification and Monitoring of Radiation using Invivo and In-vitro Dosimetry in External Beam Radiotherapy in Libya

Abstract Radiation therapy has been used in the treatment of cancer patients since its discovery in 1895, and these techniques were always in continuous scientific and technical development. It was necessary to introduce diode in-vivo dosimetry for radiation measurements to control the dose administered to patients. The patient simulating device, planning system and treatment machine are tested regularly according to set protocols developed by national and international organizations...

Assessment of Grid Alignment of X-Ray Units in Khartoum State.

AbstractThis study aimed to assess grid alignment for radiology departments in Khartoum state.A total of 10 x-ray units in radiology departments in Khartoum state from different manufacture were tested by grid alignment test tool and the optical density for radiographic film was read by transition densitometer .In this study the final result showed that the percentage of grid misalignment for x-ray machines was (40%), less than those with grid alignment x-ray machines (60%).Which means ...

Assessment Of Design Of Nuclear Medicine Department Design And Radiation Safety

ABSTRACTThe purpose of this study is to highlight the importante of radiation protection in nuclear medicine, to assess the level of application of Radiation safety measures programs in the nuclear medicine department. This study was done in selected departments of nuclear medicine included the National Center for radiotherapy ,Alneilin , Fadil and Royal Care using questionnaire for workers for evaluation of radiation safety inthe departments, in the period from...

Assessment Of Gamma Camera Quality Control Performance In National Cancer Institute -Wad Madani

AbstractThis Study Was Performed To Assess The Performance Of Gamma Camera Quality Control System In National Cancer Institute-Wad Madani Department Of Nuclear Medicine For The Following Parameters: Uniformity, Energy Resolution And Physical Inspection Peaking Using Tc99m. The Samples Of This Study For Quality Control Reading Includes 61 (Readings), Extrinsic Uniformity 52, Energy Resolution 9. Were The Data Collected In Period From January To June 2020.All Results That Was Obtained From...

Evaluation Of Performance Of The SPECT Camera In Elnilien Medical Diagnostic Centre In Khartoum

AbstractThe objective of this study is to evaluate the performance of the SPECT gamma camera at Alnilien Medical Diagnostic Centre of Khartoum This study was carried out in Nuclear Medicine Department in Alnelein Medical Diagnostic Centre (NMDC) and the results were compared with the international guidelines. The study evaluates the following parameters: energy resolution, uniformity, sensitivity and linearity All results that obtained from the study have been co...

Evaluation of the Operation system for the hydrometric Measurement stations using Value Engineering

AbstractIntegrating Administrative and Engineering Sciences, It hasprofound effect in Enriching both for the good of mankind, Asthe value management Approach depends on the Organizationof Scientific Steps in order to reach the point of balance betweenquality, cost and time ,Which invited engineers to exploit andapply this approach during the different phases of the project toachieve this balance in all aspects of technical andadministrative project in general.And the Proportion of hi...

A comparative Study for Analysis and Classification of the Electronic Passport using Genetic Algorithm and Logistic Regression ( Case study of the Sudanese Electronic Passport)

AbstractFor the purpose of comparison of the traditional statistical methods used in analysing and classifying data with a vast amount of information and modern statistical methods computerized to obtain relationships and models that help in extracting useful information and support for decision making and hence the problem of study in how Employing this field in the organization, analysis and classification of such a large amount of data, and the establishment of a general rule concern...

Measurement of the Prostate Motion in External Beam Radiotherapy

Abstract:Organ motion in Radiotherapy induce an error in the received dose by the tumourtherefore this experimental study conducted at different hospitals in Sudan(Radiation and Isotopes Centres of Khartoum (RICK) and Antalya clinic centre inperiod of 7 months, from May 2014 to December 2014.The main objective of this study was to detect and measure the periodicphysiological prostate motion during external beam radiotherapy (inspiration andexpiration) , to accurate and continuous tumor...

Evaluation of Image Quality in Fluoroscopy Machines in Khartoum State

Fluoroscopy refers to the use of an X ray beam and a suitable image receptor for viewing images of processes or instruments in the body in real time. Fluoroscopic imaging trades the high signal to noise ratio (snR) of radiography for high temporal resolution, as factors that maintain patient dose at an acceptable level must be used. The aim of this study was to perform quality control (QC) of image quality for three digital fluoroscopy units used c a r d io va s ...


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