Penetration detection method for bone cutting tool in craniotomy procedures

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Kuosmanen, Petri Haeri, Shahab 2017-05-11T10:36:36Z 2017-05-11T10:36:36Z 2017-05-08
dc.description.abstract Craniotomy is a common neurosurgical procedure in which the skull is opened to allow the surgeon access to the brain. The skull bone is to be cut without damaging underlying delicate tissues. A powered cutting instrument is used to cut the skull bone. In conventional methods, sometimes the safety of underlying tissues is compromised while cutting the skull bone. A new method of controlling the cutting tool penetration is introduced, which is based on vibrational analysis of the cutting process. Typically, amplitudes of vibrations are very sensitive to small changes in cutting parameters and this makes it difficult to rely on vibrational analysis methods in control systems. Alternatively, a method introduced in this work which relies on existence of a very specific frequency component, called corresponding frequency, in the frequency spectrum. The corresponding frequency is a function of known parameters such as rotational speed and number of the cutting edges of the cutting tool. The existence of this specific frequency component indicates that the tool tip has not penetrated under the skull bone. However, when this frequency component vanishes the control system realizes that the penetration depth of the cutting tool shall be reduced to eliminate the excessive penetration under the skull. The cutting vibrations for different cutting tool designs are measured. The FFT analysis results are studied and utilized for comparing the cutting tools. Based on the results cutting tools are categorized as cutters or vibrators. The design of the best cutter and vibrator tools are combined to design a new type of cutting tool, called hybrid tool. The hybrid tool is a cutting tool design that is optimized to work with the introduced method of cutting tool penetration detection. en
dc.format.extent 60 + 8
dc.language.iso en en
dc.title Penetration detection method for bone cutting tool in craniotomy procedures en
dc.type G2 Pro gradu, diplomityö fi Insinööritieteiden korkeakoulu fi
dc.subject.keyword penetration detection en
dc.subject.keyword breakthrough detection en
dc.subject.keyword bone cutting en
dc.subject.keyword robotic surgery en
dc.subject.keyword vibration analysis en
dc.identifier.urn URN:NBN:fi:aalto-201705114697
dc.programme.major Mechanical Engineering fi
dc.programme.mcode IA3027 fi
dc.type.ontasot Master's thesis en
dc.type.ontasot Diplomityö fi
dc.contributor.supervisor Kuosmanen, Petri
dc.programme Konetekniikan koulutusohjelma fi
dc.ethesisid Aalto 8997
dc.location P1

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