AROI-ESTRO GYN Teaching Course

CT

Advantages

Limitations

• Adenopathy • Defining Advanced disease • Monitoring Distant metastases • Planning placement of radiation ports • Guiding percutaneous biopsies • Electron density of tissues for dose calculation algorithms • Image acquisition of less than 1 min in multislice CT • Spatial relationship between brachytherapy , uterus and other organs visible. • Organs at risk: CT and MRI equal

• Ionizing radiation • Normal organ contours, borders between organs and uterine parts not clearly visible even after oral, rectal, i.v contrast • Tumour detection • Overestimation of early parametrial spread • Early involvement of bladder wall and vagina not reliable • Radiation changes • Cervix and residual disease

• Target volumes based contouring overestimated the contour width.