|Image-guided radiation therapy (IGRT) is utilization of imaging, while the patient undergoes radiation. This enables us to directly view the process of radiation and accurate and precise treatment can be expected. Computed tomography (CT), magnetic resonance imaging (MRI), ultrasound (US) and x-ray imaging can be used to deliver Radiation therapy. Imaging allows us to alter the power or location of the radiation in par with the tumor size, location etc.
Scientific journals contain articles that are peer reviewed, to ensure that articles meet the journal's standards of quality, and scientific validity. The publication of the results of research is an essential part of the scientific method. If they are describing experiments or calculations, they must supply enough details that an independent researcher could repeat the experiment or calculation to verify the results. Each such journal article becomes part of the permanent scientific record.