Kazuki Iwama

  • Citations Per Year
Learn More
AIM To investigate the frequency and characteristics of interfractional rectal displacement in patients with prostate cancer treated with image-guided intensity-modulated radiation therapy (IG-IMRT) using helical tomotherapy. PATIENTS AND METHODS Data for a total of 256 patients were analyzed. Megavoltage computed tomography (MVCT) images were acquired(More)
AIM To investigate the correlation between frequency of action level of interfractional rectal displacement requiring repeated precaution in patients with prostate cancer and late toxicity from image-guided intensity-modulated radiation therapy (IG-IMRT) using helical tomotherapy. PATIENTS AND METHODS We examined 264 patients who underwent IG-IMRT during(More)
AIM To analyze intrafractional organ motion in patients with lung cancer treated with image-guided stereotactic body radiotherapy using helical tomotherapy (SBRT-HT). PATIENTS AND METHODS Data from 25 patients with lung cancer who received 50 Gy/5 fractions of SBRT-HT were analyzed. Slow-scan megavoltage computed tomography (MVCT) images were acquired(More)
INTRODUCTION Radiotherapy is a standard treatment for prostate cancer, and image-guided radiotherapy is increasingly being used to aid precision of dose delivery to targeted tissues. However, precision during radiotherapy cannot be maintained when unexpected intrafraction organ motion occurs. CASE PRESENTATION We report our experience of internal organ(More)
AIM To examine the compatibility of the measured and calculated dose for the treatment of lung lesions by helical tomotherapy. MATERIALS AND METHODS The administered dose was measured a total of 55 times at 22 points with a radiophotoluminescence glass dosimeter (RPLGD) inserted in the position of an anthropomorphic Rando Phantom. Two Gy were prescribed(More)
AIM To evaluate an appropriate planning target volume (PTV) margin in for one to three vertebral metastases using megavolt computed tomography (MVCT) images during the course of image-guided and stereotactic intensity-modulated radiotherapy (IGRT-IMRT) by use of helical tomotherapy. PATIENTS AND METHODS A total of 25 lesions in 24 patients with vertebral(More)
AIM To analyze an intrafractional organ motion for patients with prostate cancer using soft tissue matching by megavolt computed tomography (MVCT) images during the course of image-guided intensity-modulated radiotherapy (IGRT-IMRT) using helical tomotherapy. PATIENTS AND METHODS Data from a total of 10 patients with prostate cancer who received IGRT-IMRT(More)
  • 1