Detection of the spatial accuracy of an O-arm in the region of surgical interest

Koivukangas, Tapani; Katisko, Jani; Koivukangsa, John P.

doi:10.1117/12.2006934

Cited by 1 publication

(7 citation statements)

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“…The evaluated CT device was a surgical 3-D scanner, the O-arm, and the MRI device a 1.5-T scanner. The results display the possible sources of distortions that can affect the image quality of each scanner as partially also covered by earlier authors 5,13 in the predetermined ROSI. [13][14][15] Other sources of error were minimized as the study was done in regular, ambient hospital conditions.…”

Section: Discussionmentioning

confidence: 93%

“…[13][14][15] Other sources of error were minimized as the study was done in regular, ambient hospital conditions. By optimizing the imaging parameters 5,7 for obtaining the most suitable contrast in the images, we could qualitatively perform the assessment with all possible imaging-related errors minimized to render results that are most suitable for comparison. These imaging parameters are also commonly used in the image acquisition for IGS procedures.…”

Section: Discussionmentioning

confidence: 99%

“…7 Thus, the objective of this study was to detect the spatial accuracies 5,8,9 and possible geometrical distortions 10 affecting the image quality and localization of features in three-dimensional (3-D) CT 6,7,11,12 and MR images. [7][8][9] The purpose was then to compare the quality of the images using both modalities.…”

Section: Introductionmentioning

confidence: 99%

“…These advantages have led to safer operations and to shorter recovery times. [1][2][3][4] Usually, IGS uses preoperative image data of the patient 3 meaning that the surgeon has to take into account the possible image distortions and artifacts 5 and also changes that occur in the patient's anatomy during operations. Other sources that affect the quality of IGS include technical accuracy, registration accuracy, and application accuracy.…”

Section: Introductionmentioning

confidence: 99%

“…By choosing correct imaging parameters and applicable registration technique, the registration accuracy may be improved. 5 Application accuracy is a measure of the combined overall accuracy of the IGS operation. 4 Image artifacts decrease the quality of medical images, making them less useful for diagnosis and especially for IGS procedures.…”

Section: Introductionmentioning

confidence: 99%

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Detection of the spatial accuracy of a magnetic resonance and surgical computed tomography scanner in the region of surgical interest

Koivukangas¹,

Katisko

Koivukangas

2014

J. Med. Imag

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Abstract. In image-guided surgeries (IGSs) and radiology, images are the main source of information. As image data provide the differentiation between normal and abnormal tissues in the human, the images need to be reliable and they need to provide accurate spatial representation of the patient. This research concentrates on the accuracy assessment of IGS devices in general and then specifically on the spatial accuracy of a common magnetic resonance (MR) imager and a mobile three-dimensional surgical computed tomography (CT) scanner. The accuracy assessment tool had been designed to be universal and to enable its use in the hospital setting. In this study, it was used in detecting the spatial accuracy of a commercial surgical CT scanner, the O-arm, and a 1.5-T MR imager. The results show the tendency of magnetic resonance imaging to produce slight decreases in spatial accuracy toward the fringes of the images from the isocenter. Furthermore, the results indicate that the accuracy of both scanners was within pixel size and thus highly accurate in the region of surgical interest of this study.

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Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%