Dosimetry device for quantification of radiation

Patent metadata

Field	Value
Publication number	US-11619749-B2
Application number	US-201917257729-A
Country	US
Kind code	B2
Filing date	Jun 28, 2019
Priority date	Jul 5, 2018
Publication date	Apr 4, 2023
Grant date	Apr 4, 2023

Abstract

Provided herein is a dosimetry device for quantifying the dosage of radiation emitted from a radiation source, the device comprising: (i) a radiation dose indicator; (ii) an optical means to capture the color change; and (iii) a software means to compare the optical density of the dose indicator as compared to a predetermined calibration curve. Also provided herein is a method of quantifying the dosage of radiation emitted from the radiation source. Further provided herein is use of said dosimetry device in various medical, food and industrial applications.

First claim

We claim:

1. A dosimetry device for quantifying a dosage of radiation emitted from a radiation source, the device comprising:
(i) a radiation dose indicator comprising a radiation sensitive film prepared from polyacetylene, lithium, sodium, potassium or zinc salt of polyacetylene capable of measuring an amount of radiation emitted from a radiation source, wherein the radiation measured may be in a radiation dose range of about 0.01 Gray (Gy) per second to about 10,000 Gray (Gy) per second and producing a representation of the amount of radiation emitted as a color change;
(ii) an optical means configured to capture the color change produced by the dose indicator after the dose indicator is exposed to the amount of radiation; and
(iii) software configured to compare an optical density of the color change produced by the dose indicator with a predetermined calibration curve to quantify the dosage of radiation emitted from the radiation source, wherein the predetermined calibration curve is developed using a percentage of optical density versus a cumulative radiation dosage, and wherein the predetermined calibration curve is based on an optical density-red linear response characteristic of the radiation dose sensor.

2. The dosimetry device of claim 1 , wherein the radiation sensitive film is a radiochromic film.

3. The dosimetry device of claim 1 , wherein the radiation sensitive composition comprises a marker.

4. The dosimetry device of claim 3 , wherein the marker comprises a dye or a pigment.

5. The dosimetry device of claim 1 , wherein the optical means is selected from the group consisting of a smart phone camera, a high definition camera, a magnifying camera, a magnifying microscope, a densitometer, an image scanner, a video camera a TV camera, and an optical imaging device.

6. The dosimetry device of claim 1 , wherein the software comprises a software program based on quantification algorithms capable of characterizing the color change in the form of color spaces, converting the color spaces into a numerical dosimetry data set and comparing the numerical dosimetry data set to a pre-determined color versus radiation dose response data set.

7. The dosimetry device of claim 6 , wherein the numerical dosimetry data set is capable of being up-loaded into a cloud computing environment, enabling access to a plurality of information networks and software management tools.

8. The dosimetry device of claim 1 , wherein the dosimetry device is regulatory compliant and is configured to be used to facilitate safe storage of blood in blood bags, sterilization of surfaces and solutions, medical imaging, medical or industrial equipment quality assurance testing, UV light measurement, food processing and storage, and transportation of radiation sensitive materials.

9. A method of quantifying a dosage of radiation emitted from a radiation source, comprising the steps of:
(i) exposing a dosimetry device to irradiation, said dosimetry device comprising a radiation sensitive indicator comprising a radiation sensitive film prepared from polyacetylene, lithium, sodium, potassium or zinc salt of polyacetylene configured to measure an amount of radiation emitted from the radiation source, wherein the radiation measured by the indicator may be in a radiation dose range of about 0.01 Gray (Gy) per second to about 10,000 Gray (Gy) per second and produce a visual representation of the amount of radiation as a color change;
(ii) capturing the color change of the dose indicator after exposure to the amount of radiation using an optical means; and
(iii) comparing an optical density corresponding to the color change to a predetermined calibration curve to quantify the dosage of radiation emitted from the radiation source, wherein the predetermined calibration curve is developed using percentage optical density versus cumulative radiation dosage, and wherein the predetermined calibration curve is based on an optical density-red linear response characteristic of the radiation dose sensor.

10. The method of claim 9 , wherein the optical means is a photographic densitometer.

11. The method of claim 9 , wherein the optical means is a smart phone.

Assignees

• Isp Investments Llc

Inventors

• Crohn Robert
• Hood David K

Classifications

• G01J1/0219

  Electrical interface; User interface · CPC title

• G01T1/06 Primary

  Glass dosimeters {using colour change; including plastic dosimeters} · CPC title

• G01T1/08

  Photographic dosimeters {(photometry G01J1/52)} · CPC title

• G01J2001/0261

  Pocket size; Card size · CPC title

• G01T1/04 Primary

  Chemical dosimeters (G01T1/06, G01T1/08 take precedence) · CPC title