RADIATION DOSIMETER
A radiation dosimeter for measuring the dose of radiation applied during radiation therapy includes a substrate, a phosphor containing layer including a stimulable phosphor and a binder on a side of the substrate, the weight ratio of the binder to the phosphor in the phosphor containing layer is 10 or higher, a colorant, and optionally a layer in contact with the phosphor containing layer. The colorant provides a total light absorbance of the layers applied on the side of the substrate containing the phosphor containing layer of at least 0.04 at the stimulation wavelengths of the stimulable phosphor.
1 - 10 . (canceled)
11 . A radiation dosimeter for measuring a dose of radiation applied during radiation therapy, the radiation dosimeter comprising:
a substrate;
a phosphor containing layer including a stimulable phosphor and a binder on a first side of the substrate;
a colorant; and
an optional layer in contact with the phosphor containing layer; wherein
a weight ratio of the binder to the stimulable phosphor in the phosphor containing layer is 10 or higher; and
the colorant provides a total light absorbance of all layers applied on the first side of the substrate of at least 0.04 at stimulation wavelengths of the stimulable phosphor.
12 . The radiation dosimeter according to claim 11 , wherein the stimulable phosphor includes BaFBr(I):Eu, BaSrFBr:Eu, or CsBr:Eu.
13 . The radiation dosimeter according to claim 11 , wherein the colorant is contained in the phosphor containing layer.
14 . The radiation dosimeter according to claim 12 , wherein the colorant is contained in the phosphor containing layer.
15 . The radiation dosimeter according to claim 11 , wherein the optional layer is a top layer on top of the phosphor containing layer.
16 . The radiation dosimeter according to claim 12 , wherein the optional layer is a top layer on top of the phosphor containing layer.
17 . The radiation dosimeter according to claim 15 , wherein the colorant is contained in the top layer.
18 . The radiation dosimeter according to claim 16 , wherein the colorant is contained in the top layer.
19 . The radiation dosimeter according to claim 12 , wherein the optional layer is an intermediate layer located between the phosphor containing layer and the substrate.
20 . The radiation dosimeter according to claim 19 , wherein the colorant is contained in the intermediate layer.
21 . The radiation dosimeter according to claim 17 , wherein the colorant is contained in the phosphor containing layer and in the top layer.
22 . The radiation dosimeter according to claim 11 , wherein the weight ratio of the binder to the stimulable phosphor in the phosphor containing layer is 15 or higher.
23 . The radiation dosimeter according to claim 12 , wherein the weight ratio of the binder to the stimulable phosphor in the phosphor containing layer is 15 or higher.
24 . The radiation dosimeter according to claim 12 , wherein an amount of the colorant is at least 0.008 mg/cm 2 .
25 . The radiation dosimeter according to claim 11 , wherein the substrate consists of a white polyethylene terephthalate foil.
26 . The radiation dosimeter according to claim 12 , wherein the substrate consists of a white polyethylene terephthalate foil.
27 . The radiation dosimeter according to claim 12 , wherein the substrate consists of a black polyethylene terephthalate foil.
28 . The radiation dosimeter according to claim 12 , wherein the colorant includes particles.
29 . A method of measuring a radiation dose comprising the steps of:
exposing the dosimeter according to claim 12 to radiation;
stimulating the irradiated dosimeter with visible light so as to emit light; and
measuring intensity of the light emitted by the stimulated dosimeter.
30 . The method according to claim 29 , wherein the radiation consists of protons.