Publications by authors named "H Watabe"
Significance: For therapeutic approaches for upper tract urothelial carcinomas, the absorption and reduced scattering coefficients of these tissues are essential parameters to quantitatively evaluate the distribution of light treatment effects.
Aim: The and spectra of the human ureter, fatty tissue, ureteral and renal pelvic carcinomas, and porcine ureter and fatty tissue are measured over 400 to 700 nm to evaluate projected light penetration depths .
Approach: The optical properties were determined with a double integrating sphere optical system and inverse Monte Carlo methods.
Article Synopsis
- A dosimeter must be calibrated in a field with energy and dose rates similar to its intended measurement environment, especially in areas like nuclear reactors and radiation therapy where high-energy photons are present.
- The Japan Atomic Energy Agency and National Metrology Institute of Japan provide high-energy reference fields for testing dosimeters, containing photon energies above several megaelectronvolts.
- The study assessed the performance of two-cavity ionization chambers in these high-energy fields, confirming their accuracy for air kerma measurements with an acceptable level of uncertainty.