Performance Characteristics and Quality Assurance Aspects of Kilovoltage Cone-Beam CT on Medical Linear Accelerator

Image quality and stability of image-guided radiotherapy (IGRT) devices: A comparative study

“…The radiation oncologist makes decisions which influence patient therapy based on those images. This makes it imperative that quality assurance of IGRT equipment is integrated into the quality management of a radiotherapy department [11][12][13]. Furthermore, new treatment concepts such as adaptive radiotherapy (ART) and online planning are heavily dependent on information acquired with IGRT equipment.…”

Variation of patient imaging doses with scanning parameters for linac-integrated kilovoltage cone beam CT

“…Combination of optimized scanning parameters should be properly chosen to reduce patient imaging dose while maintaining the same image quality [19][20][21]. In our another study [22] which shows that the spatial resolution increased from 5l p/cm to7l p/cm when the tube voltage varied from 80 kV to140 kV.…”

American Society for Therapeutic Radiology and Oncology (ASTRO) and American College of Radiology (ACR) Practice Guidelines for Image-Guided Radiation Therapy (IGRT)

“…Fiducial markers do not provide information about changes in the size and shape of tumors that may occur during a several-week course of radiation therapy (9)(10)(11)(12)(13). Various modalities, including orthogonal imaging, ultrasonography, or CT, can be used for real-time imaging of the tumor and surrounding tissues during radiation therapy.…”

“…Conventional CT or cone beam CT using kilovoltage X-rays (kVCT) can be used to identify most superficial or deep-seated tumors (11,12). Ultrasonography depicts echogenicity differences between tumors and the surrounding tissues and has been used for several years, mainly for localizing the prostate and other superficial tumors (9).…”