Dosage Calculator

HOW TO USE: Enter any two fields in a formula and the answer will appear in the third field.

To start again, use the "Clear" button at the bottom to clear all the fields.

After using the Dosage Calculator, please use the Feedback form at the bottom of the page to offer feedback and ask questions.

Laser research often quotes fluence as the "dose" in J/cm2 (Joules per centimetre square).

To calculate this you must first know the irradiance (beam power density) in W/cm2.

This is calculated by dividing the power by the beam spot size.

NOTE : Power Density is not the size of the aperture. The beam spot size is usually much smaller than than the aperture and needs to be measured with a beam profiler. This is a skilled job that should be done by an experienced laser engineer / physicist. Tell them you would like to have the 1/e2 irradiance.

Once you have the irradiance you can calculate the treatment time for the fluence (energy density) you wish to deliver (often called "dose").

Alternatively, you can calculate the fluence you are delivering by entering the irradiance and treatment time.

Some laser research just quotes the Energy expressed in Joules.

If you are writing a scientific paper or planning some research please contact James Carroll @ THOR for help with your project.

Power, beam area and power density (irradiance)
Average Power [W]

Beam Spot Size [cm²]		Power Density (irradiance) [W/cm²]



Energy Density (fluence)
[J/cm²]

Time in Seconds [s]		Power Density (irradiance) [W/cm²]



Energy in Joules
[J]

Time in Seconds [s]		Average Power [W]

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THOR Photomedicine Ltd is an ISO 13485:2016 certified medical device company.

The THOR LX2.3 Photobiomodulation system has a medical CE mark (EC certificate). It is indicated for oral mucositis, tendinopathies, joint pain, neck pain and back pain for marketing in the UK, EU and Australia.

The THOR LX2.3 Photobiomodulation system is also FDA Cleared for marketing in the United States for: Temporary increase in local blood circulation, temporary relief of minor muscle and joint aches, pains and stiffness and relaxation of muscles; for muscle spasms, and minor pain and stiffness associated with arthritis.

Excluding the THOR LED Helmet, THOR LX2 and NovoTHOR systems are manufactured under conditions fulfilling the quality system requirements of Annex II, excluding (4), of the directive 93/42/EEC as amended and satisfy the applicable international harmonised standards.

Positive systematic reviews published by:

The British Medical Journal (BMJ), The Lancet, the International Association for the Study of Pain (IASP), the World Health Organisation (WHO), the Multinational Association for Supportive Care in Cancer (MASCC), the European Society for Medical Oncology (ESMO)

Appropriate regulatory clearance or approvals include:

Photobiomodulation Equipment and Training - THOR Photomedicine

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Dosage Calculator

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