Spatial Resolution Measurement On Ultra-Low Dose CT Image In a Long Axial Field Of View PET-CT Scanner

Hillen, Tygo (2023) Spatial Resolution Measurement On Ultra-Low Dose CT Image In a Long Axial Field Of View PET-CT Scanner. Bachelor's Thesis, Biomedical Engineering.

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Abstract

PET-CT imaging is useful for various reasons in oncology or in other departments. However, a patient is exposed to a certain amount of dose during every scan from both the PET scan and the CT scan. This dose can have negative effects on the health of a patient in the long term and should therefore be minimised as much as possible. This study investigates the spatial resolution of an Ultra Low Dose scanning protocol. This protocol is created by adding a tin filter, reducing the current and increasing the pitch. The effect of this protocol on the spatial resolution is assessed and compared to the routine protocol used currently. To investigate this a catphan 600 phantom was used to evaluate the spatial resolution both in-plane (X, Y) and cross-plane(Z). Before the spatial resolution could be assessed a noise reduction technique was applied called averaging. The spatial resolution was assessed with different methods to be compared with each other as well. A Point Spread Function was used besides a Slice Sensitivity Profile and an MTF. The results showed that the spatial resolution cross-plane reduced by 0.5 mm to 1.5 mm. In the X,Y plane the spatial resolution is reduced by 0 mm to 1 mm, this claim however still requires more investigation to prove.

Item Type:	Thesis (Bachelor's Thesis)
Supervisor name:	Tsoumpas, C. and Willemsen, A.T.M.
Degree programme:	Biomedical Engineering
Thesis type:	Bachelor's Thesis
Language:	English
Date Deposited:	05 Jul 2023 09:48
Last Modified:	17 Jul 2023 12:47
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/30260

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