Quasi monochromatic synchrotron radiation source based on compact X-band linear accelerator and terra watt laser for medical diagnostics

ABSTRACT

X-ray has many useful applications in different research field such as solid state physics, biology, microscopy, medical imaging and diagnostics. One of the great interests in medical application is the Coronary Arterio Graphy [CAG] in which the coronary artery is visualized by contrast agent [iodine] injected into the artery by a catheter that inserted into the artery. This technique is very invasive for patient and associated with high irradiation dose for the patient and for the medical doctor too due to the wide energy spectrum emitted from the X-ray tube used in this technique. In this paper we avoided all the shortcomings of the aforementioned technique by introducing a new, cheap and compact system to produce hard X-ray based on electron-laser collision which enables the physicians to visualize the coronary artery dynamically. The dynamic visualization was possible in this technique due to the high flux of the X-ray photons, which is about 10[11] photons/second. This technique utilizes the advantage of the K-edge attenuation of the iodine [Z = 53] at X-ray energy of 33.169 KeV; hence a monochromatic X-ray radiation just above this energy will give high contrast ratio and clear image. The contrast agent [iodine] in this technique will be injected intravenously instead of using a catheter that inserted into the artery. For that reason the new technique is known as an Intra Venous Coronary Arterio Graphy [IVCAG]. The X-ray flux generated from laser-electron collision has been optimized using CAIN code, while the accelerating cavities of the X-band linear accelerator were designed and optimized using SUPERFISH code. Several scenarios have been proposed to achieve our final goal of compact and stable hard x-ray sources. The progress of the system is presented too