Publications by authors named "Takeshi Johkou"
To evaluate the clinical usefulness of gantry tilt scanning as an image reconstruction technique for avoiding artifacts caused by metallic dental fillings. Gantry tilt scanning was used with multidetector-row computed tomography for imaging in patients with dental fillings. Using a novel PC-based program, the oblique images obtained were reconstructed to transverse images using nearest neighbor and bilinear interpolation methodologies in order to avoid metallic streak artifacts.
View Article and Find Full Text PDF[influence and improvement of metal artifacts in dental structures by CT for radiation treatment planning: reconstruction of transverse images using oblique images by gantry tilt scanning].
Nihon Hoshasen Gijutsu Gakkai Zasshi
March 2007
Article Synopsis
- Intensity-modulated radiation therapy (IMRT) requires precise treatment planning, which is often affected by metal artifacts from dental structures in CT images at the oropharynx region.
- These artifacts hinder the visualization of tumors and lymph nodes, leading to inaccurate CT values that can impact radiation treatment.
- To address this, researchers simulated treatment planning using both normal and artifact-affected CT images and found that using CT images without artifacts leads to more accurate target volume measurements and improved dose distribution.