REKONSTRUKSI 4D CITRA MRI ALIRAN DARAH DAN TROMBUS PADA PASIEN ANEURISMA AORTA ABDOMINALIS

Karyati, Cut Maisyarah (2013) REKONSTRUKSI 4D CITRA MRI ALIRAN DARAH DAN TROMBUS PADA PASIEN ANEURISMA AORTA ABDOMINALIS. PhD thesis, Gunadarma University.

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Abstract

Abdominal aortic aneurysm (AAA) is the most common location of an aneurysm in the blood vessel diseases. Therapeutic indications for AAA non-rupture is mainly based on the criteria of maximum diameter of the aneurysm. Commonly accepted therapeutic indication is when the largest diameter reaches 5.5 cm. In fact, some small aneurysms (less than 5.5 cm) can rupture, while the bigger may not. In addition, there are other variability that have big influence in the evolution of diameter on small AAA was observed, such as the presence of thrombus in the AAA, the velocity profile of blood flow, and the blood volume inside the AAA. Image processing is a job out of range for a doctor. Thus, improve the living material modeling techniques and simplifies the material biomechanical that still a matter of discussion, will create new opportunities for the application of Information Technology in medical area. Deformable models approach for image segmentation of dynamic blood flow has been used and developed in conjunction with the method of scalar volume data (isosurface) to produce image reconstruction which can represent the anatomy of the aortic aneurysm with blood flow animation in each category of thrombus. This method has been proven to successfully presenting the animation of blood flow based on distinction the color of vector that adapted to the direction of blood flow in each coordinate axis (x, y, z). White color which has the highest intensity value has been successfully visualized as a color that represents the presence of thrombus in the aneurysm. The results of this research can be used by relevant experts in the field of Cardiovascular whose using MRI for observations, as well as helping the aortic surgeon in the decision to perform surgery before the rupture of the aortic wall that causes death. The result of this research is a software that can categorize thrombus in the small AAA. This software also can extract and reconstruct the image of the blood flow along with the animation of blood flow in each thrombus category automatically. In addition, this software can process the calculation of the size of thrombus area, the maximum diameter, blood flow velocity and volume of blood flow. In this study, it can be seen that the presence of thrombus parameters can affect the volume and blood flow velocity, ie, the larger thrombus would further reduce the volume and blood flow velocity. However, the presence of thrombus, blood flow velocity and volume of blood flow has not been shown to affect the evolution of diameter of the small AAA. Keywords : Abdominal Aortic Aneurysm , Blood Flow, Image Processing, MRI, Thrombus

Item Type: Thesis (PhD)
Subjects: Q Science > Q Science (General)
Divisions: Program Doktoral > Doktoral Teknologi Informasi
Depositing User: Mr Reza Chandra
Date Deposited: 25 May 2016 06:31
Last Modified: 25 May 2016 06:31
URI: http://repository.gunadarma.ac.id/id/eprint/1598

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