Low contrast in x-ray attenuation imaging between different materials of low electron density is a limitation of traditional x-ray radiography. Phase contrast imaging offers the potential to improve the contrast between such materials, but due to the requirements on the spatial …
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The Pseudo Random Arterial Modulation (PRAM) is a non-invasive MRI based method to measure blood flow. It does not require any contrast agent but rather uses water protons in the body as the contrast. PRAM is based on a pseudo random sequence of inversions and non-inversions of …
A more complete understanding of lumbar spine kinematics could improve diagnoses and treatment of low back pathologies and may advance the development of biomechanical models. Kinematics describes motion of the five lumbar vertebrae without consideration for the forces that caus…
Medical images constitute a special class of images that are captured to allow diagnosis of disease, and their "correct" interpretation is vitally important. Because they are not "natural" images, radiologists must be trained to visually interpret them. This training process inc…
Breast cancer is the most frequently diagnosed cancer and ranks second among cancer deaths in the U.S. for women. Microcalcification detection and characterization plays an important role in the early diagnosis of breast cancer and is one of the earliest signs of malignancy. The…
The purpose of this quantitative, correlational research study was to evaluate the relationship between occupational stresses and job satisfaction among the radiologic technologists working in hospitals in the eastern province of Saudi Arabia. The predictor variable for this stu…
In this thesis 6 and 18 MV photon beams for a Varian linear accelerator were simulated using a general purpose Monte Carlo code MCNP5 (Monte Carlo N-Particle Transport Code). The potential of MCNP5 is explored to calculate the dose in high dose gradient regions. In addition, MCN…
The structure of the health service in Iran has been described and the role and position of Radiology within the service explained. A comparison has been made between the current basic recommendations and requirement of the IAEA for a radiology service and requirements as laid d…
The processing of an emotional stimulus involves a multi-step process that includes appraising and identifying a stimulus as well as producing an affective state in response. Many individuals with depressive disorders such as major depressive disorder (MDD) experience impairment…
This thesis's work focuses on the clinical applications of U-Net on MRI image segmentation, with various dimensions and depths based on the clinical question. Chapter 1 is a brief introduction to magnetic resonance imaging. Chapter 2 introduces convolutional neural network and U…
Amaç: Bu araştırmada elit kürekçiler ile sedanter bireylerin nöroanatomik farklılıklarının araştırılması hedeflenmiştir. Gereç ve Yöntem: : 18-35 yaş arasındaki 15 elit kürekçi ile 15 sedanter gönüllüden Manyetik Rezonans (MR) ile toplanan anatomik beyin görüntüleri bölütlenerek…
It has been widely accepted that plastic changes occur after brain damage that are thought to aid in functional and structural recovery. While there is ample evidence that plastic changes do indeed occur after damage, there is also evidence that certain representations within th…
Simulating Annealing Algorithm (SAA) has been proposed for optimization of the Intensity-Modulated Radiation Therapy (IMRT). Despite the advantage of the SAA to be a global optimizer, the SAA optimization of IMRT is an extensive computational task due to the large scale of the o…
Amaç Bu çalışma ilk kez elektif koroner anjiyografi olacak hastalara verilen eğitimin anksiyete üzerine etkisinin belirlenmesi amacıyla yapıldı. Gereç ve Yöntem Deneysel olarak yapılan bu araştırmanın evrenini Nisan 2019 Haziran 2019 tarihleri arasında İstanbul İl Sağlık Müdürlü…
Atherosclerotic plaque rupture at the carotid bifurcation is a major cause of stroke. While plaques vulnerable to rupture progress under significant influence from the local biochemical environment, and often experience a chronic or acute inflammatory process, mechanical forces …