Advances in clinical application of CT in the image-guided radiotherapy / 中国癌症杂志

ABSTRACT

Three-dimensional conformal radiotherapy with intensity-modulated radiation beams significantly enhances the ability to produce sharp dose gradients in the boundaries between a tumor and nearby critical structures.Small uncertainties in the daily repositioning of patients can lead to the overdose of the critical structure and the escape of the target volume.It emphasizes the need to improve the ability to localize the target for treatment. And the image-guided radiotherapy was development.Although steady streams of enhanced new methods of imaging are being introduced to improve treatment guidance and treatment verification,the development of kilovoltage cone-beam CT integrated with the medical linear accelerator for the specific purpose of guiding therapy will permit localization and targeting of soft-tissue structures at the time of treatment.In this review,we focus on the clinical application of CT in the image-guided radiotherapy.