Αποτελέσματα Αναζήτησης
21 Μαρ 2016 · A 1 J/cm² dose can be applied to 5cm² of skin, while the same 1 J/cm² dose could be applied to 50cm² of skin. The dose per area of skin is the same (1J & 1J) in each case, but the total energy applied (5J vs 50J) is vastly different, potentially leading to different systemic outcomes.
UVR, VL, and IR are optical radiation. VL can be divided by color: blue/violet (400–500 nm), green (500–565 nm), yellow (565–590 nm), orange (590–625 nm), or red (625–700 nm). Similarly, UVR is separated into separate spectra: UVA (320–400 nm), UVB (290–320 nm), UVC (200–290 nm), and extreme (EUV; 10–120 nm).
17 Ιουν 2021 · The entrance skin dose (or entrance surface dose), abbreviated as ESD, is the measure of the radiation dose that is absorbed (measured in milligray) by the skin as it reaches the patient. Entrance skin dose is a directly measurable quantity, often, measured using thermoluminescent dosimeters (TLD) 1. Entrance skin dose is often a benchmark ...
Recommendations. The choice of dose fractionation takes into account patient factors, tumour and field size. The following schedules are examples of those appropriate for the treatment of skin SCCs and BCCs either definitively or adjuvantly:
Ionizing radiation can be either electromagnetic waves (photons) on the high-energy end of the electromagnetic spectrum (very high UV, X-rays, and gamma-rays), or energetic subatomic particles, ions, and atoms moving at high speeds. Figure 1 illustrates the more common types of ionizing radiation.
The time to deliver the total dose will depend on the energy output of the source/irradiance. Here is a typical chart that uses estimated skin phototypes to determine the initial dose and subsequent increments each treatment, in the absence of erythema.
THz radiation is an electromagnetic wave with a frequency that lies in between the infrared and microwave regions—namely, in the 0.1- to 10-THz range (1 THz = 10 12 Hz). 3 Its wavelengths and photon energies range from 3 mm to 30 μ m and from 0.41 to 41 meV, respectively.
