OALib Journal
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Jan 17, 2024Open    Access

Mass Stopping Power and Range of Alpha Particles in Biological Human Body (Water and Eye Lens Tissue)

Arwa Alshibel, Khalda T. Osman
We used the MATLAB Program to calculate the mass stopping power and range of alpha particles in biological human body tissues (such as water and the eye lens tissues) at energies between 0.2 and 200 MeV. The Bethe Block formula was used to calculate the mass stopping power, and the simple integration (continuous slowing down approximation) method was used to calculate the alpha particle ranges. Empirical formulae were developed to determine mass-stopping power and ranges of water and eye lens ti...
Open Access Library J.   Vol.11, 2024
Doi:10.4236/oalib.1111081


Oct 30, 2023Open    Access

Mass Stopping Power and Range of Alpha Particles in Biological Human Body Tissues (Blood, Brain, Adipose and Bone)

Arwa Alshibel, Khalda T. Osman
The mass stopping power and range of alpha particles in biological human body tissues (blood, brain, adipose, and bone) were computed using the MATLAB Program at energies ranging from 0.2 MeV to 200 MeV. The Bethe Block formula was used to compute the mass stopping power. Furthermore, the alpha particle ranges at the tissues were calculated using the simple integration (continuous slowing down approximation) method. The results of mass-stopping power versus energy and range versus energy were gr...
Open Access Library J.   Vol.10, 2023
Doi:10.4236/oalib.1110775


Sep 30, 2021Open    Access

Ultraviolet Radiation Index over Abuja, Nigeria

Enoch O. Elemo, Efua A. Ogobor, Otonye E. Mangete, Benjamin G. Ayantunji, Kemi B. Doherty, Hauwa A. Sani, Odunjoye S. Tomori, Mohammed L. Abdulkareem
The sunlight that gets to the earth’s surface is composed of three major types of radiation. The Infrared radiation is what gives sunlight its warmth. Visible light helps us see. And lastly the ultraviolet radiation (UV) which poses the most damaging effects of the sunlight cannot be seen nor felt. The UV data over Wuse, Abuja, Nigeria (9.08°N, 7.48°E) was recorded with the Davis wireless vantage pro2 weather station for the year 2020. The research showed that the UV index was higher at ...
Open Access Library J.   Vol.8, 2021
Doi:10.4236/oalib.1107924


Jun 28, 2021Open    Access

Validation of a 3D Pretreatment Quality Assurance Tool for Volumetric Modulated Arc Therapy (VMAT)

C. Francis Djoumessi Zamo, M. Ndontchueng Moyo
Implementation of a pretreatment quality assurance (QA) system needs a strong validation process and a good comprehension of the tool. The aim of this study is to validate COMPASS (IBA Dosimetry, Germany) as our 3D pre- treatment QA tool for system of Pinnacle as treatment planning system and an ELEKTA synergy linear accelerator. Validation of the systems was performed with static and dynamic plans on AAPM TG-119 phantom and 10 real VMAT plans for prostate and head and neck. Comparison between p...
Open Access Library J.   Vol.8, 2021
Doi:10.4236/oalib.1107434


Apr 30, 2021Open    Access

The Influence of the Minimum Dynamic Leaf Gap on VMAT Plans Quality

C. F. Djoumessi Zamo, M. Ndontchueng Moyo, A. Colliaux, V. Blot-Lafond
The aim of the present work is to investigate the influence of dynamic minimum leaf gap into Pinnacle3 on VMAT plans quality. Three treatment machines were modeled in our TPS with a different value of dynamic minimum leaf gap of 5, 10 and 20 mm. VMAT plans of AAPM TG-119 phantom and twenty clinical real cases were planned on each machine. Based on AAPM TG-119 guidelines, we compared the machine on their ability to fulfill the dose goals; the pretreatment quality assurance was done with COMPASS Q...
Open Access Library J.   Vol.8, 2021
Doi:10.4236/oalib.1107378


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