BURKE, BENJAMIN,FALLONE, B. GINO,WACHOWICZ, KEITH,RATHEE, SATYAPAL
申请号：
CA2827636
公开号：
CA2827636A1
申请日:
2013.09.19
申请国别(地区):
CA
年份:
2015
代理人:
摘要：
A computer-implemented method is provided for reducing artefacts in an MRIimage as a result of radiation induced current in collector coils of an MRIapparatus. Themethod comprises the following steps. Selecting a plurality of pixels in a k-space imageprior to generation of the MRI image. Analysing each of the plurality ofselected pixels todetermine whether a pixel intensity is greater than a predefined globalthreshold. Foreach pixel having pixel intensity greater than the predefined globalthreshold, determiningwhether the pixel lies within a signal region of the k-space image or outsideof the signalregion of the k-space image. For each pixel that lies outside of the signalregion,modifying the pixel intensity to be similar to a background pixel intensity,thereby creatinga modified k-space image. Generating the MRI image based on the modified k-spaceimage. A non-transitory computer readable medium and a radiation therapysystemconfigured to implement the method are also provided.
